Find cheap flights from Washington Dulles Airport to Denver

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IAD — DEN
Jul 1 — Jul 81
Round-trip
1 adult
Economy
0 bags
From?
To?
Fri 7/1
Fri 7/8

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Good to know

Low season

January

High season

May

Cheapest flight

$145

Average price round-trip

$352

Good deal round-trip

$480

Good deal one-way

$267
Best time to beat the crowds with an average 31% drop in price.
Most popular time to fly with an average 27% increase in price.
Flight from Washington, D.C. Dulles Intl to Denver Intl
(avg. price over the last 2 weeks)
or less
or less

When to book flights from Washington Dulles Airport to Denver Intl

Estimated round-trip price
Average price per month
Flight prices as travel date approaches

Top tips for finding a cheap flight from IAD to Denver

  • Looking for a cheap flight? 25% of our users found flights on this route for $267 or less one-way and $480 or less round-trip.
  • The cheapest flight from Washington Dulles Airport to Denver was found 62 days before departure, on average.
  • Book at least 4 weeks before departure in order to get a below-average price.
  • High season is considered to be April, May and June. The cheapest month to fly is January.
  • Morning departure is around 10% more expensive than an evening flight, on average*.
*Average of the lowest prices shown in KAYAK’s search results for departures within the next 30 days

FAQs for booking Washington Dulles Airport to Denver flights

Top 3 airlines serving Washington, D.C. Dulles Intl to Denver Intl

Scores according to KAYAK customer reviews
7.9
DeltaOverall score based on 30949 reviews
8.1Boarding
7.8Comfort
8.5Crew
7.8Entertainment
7.5Food
Airline reviews
Cons: "The main economy seats were far too narrow."
Read more about Delta
Cons: "The main economy seats were far too narrow."
Pros: "The crew was very attentive and had great personality. They anticipated any needs we had."
Cons: "Not really an experienced flyer. Overall the flight seemed good. No issues with airline or airport. Just don’t understand self-important people that feel compelled to push the overhead storage limits with their bags."
Pros: "Quickly moving through the airport."
Cons: "Take out old planes. It was really run down."
Pros: "The plane was nice"
Cons: "I’m still sitting in Minneapolis so I would have liked to be at my destination. And I had to pay for the overnight accommodations."
Pros: "Crew was friendly."
Cons: "Wish the seat was more comfortable. Landing was jittery and bumpy."
Cons: "Flight was delayed and completely packed so our family could not get seats together"
Pros: "Love the fact that the head rests move to support your head better."
Cons: "Delayed"
Pros: "Boarding was easy."
Cons: "I am 6' 1" tall and weigh 220, so not out of the ordinary and I felt like I was stuffed into a sardine can."
Pros: "Super comfortable seats. Lots of movie options."
Cons: "Food was not very good"
Pros: "Flight was smooth, arrived early..crew was prompt and courteous."
Pros: "Entertainment"
Cons: "Boarding at JFK.Always messy"
Pros: "Boarding was quick"
Cons: "No entertainment, plane was small"
Pros: "Good entertainment selection and great crew"
Cons: "Seats are more uncomfortable relative to other airlines"
Cons: "First delay notification: 1 hour 20 minutes 1 hour later, Second delay notification: 3 hours 15 minutes 2 hours later: Third delay notification: 3 hour 50 minutes Fourth delay notification: 4 hours 25 minutes Fifth delay notification: 4 hour 32 minutes No explanation for reason. Last time flying Delta."
Pros: "Early and middle seat was open!"
Cons: "Coffee tasted like fish. :("
Pros: "Entertainment choices were excellent, many new movies available, so I was able to see movies is been meaning to watch. There were drinks available."
Cons: "The air vents barely trickle out any air anymore. No relief to be had. Airline crews say hi and goodbye but that doesn't make them friendly."
Pros: "The crew on the airplane was great. We had 2.5 hours turbulences but the crew started to give out drinks as soon they got the ok from the pilot"
Cons: "We went in LGA to the Baggage drop off and the employee there was super rude. On the flight to New York with Delta we had to check our carry ons at the gate because it wasn't enough room for bags in the airplane.so we asked when we checked our one suitcase if we can/should check our carry ons to avoid having to do it at the gate. The delta employee told me sure no problem. He checks in my one suitcase I purchased gives me the tracking paper and says ok have a good flight. I asked him so what is with our carry ons and he told us that that would cost 25$ and we can't check those in at the drop off?!?We ended up taking the carry ons with to the gate and then off course there wasn't enough room on the airplane that we had to check it in. And surprise it was free?? We had never issues with Lufthansa, icelandair etc. with checking our bags at drop off to not needing to carry it around and than still end up to check it at the airplane. Every airline has been more than happy that we volunteer to check our bags that they don't have the trouble at the gate."
Pros: "We boarded close to on time, no hassles. Allowed my husband and me (retired military) to board early, thank you."
Cons: "LAX security is awful. We never left the airport (arrived LAX from Sydney AU) yet were forced thru security again. Had to remove shoes, was scanned and "frisked" by TSA to get to Denver. To go to Australia, Denver TSA waived the removal of shoes, skipped the scan for the metal detector and no one touched me, ditto for LAX on the trip to Sydney. Where's the uniformity or standards for TSA?? Why did I have to be subjected to this garbage on the way home?? This is why I despise flying. It makes no sense to me. This ruined what was a great vacation."
Cons: "Very little leg room."
Pros: "JFK to Denver the flight Attendants were once again great. Lots of entertainment choices again. The usual rough air coming into DIA."
Cons: "From JFK to Denver the seats were to close for leg room by an inch or two. The temperature was hot most of the flight."
Pros: "Fly attenden alwas with a beautiful smile"
Pros: "Love the built in tv’s with free entertainment."
Cons: "The plane got delayed on the runway and the shut the engines off so the plane got super hot, but even after we got up in the air it never cooled down. Normally I’m freezing on flights, but I just sat sweating this whole flight. It was terrible."
Pros: "I usually have had great experiences with Delta. The meal selection was limited. By the time they made it up to my seat they had run out of what we wanted. Also, the entertainment system at my seat and my husbands wasn’t working well. One of the bathrooms had a cabinets Tvst oliiiooooiiooooioiooiiiooiio"
Pros: "The staff really helped me out getting on standby so that I didn't have to wait for a 9 hour layover. Overall great experience and great staff."
Pros: "Everything was perfect !! Staff friendly"
Pros: "Great and friendly crew"
Cons: "baggage rules, check in with baggage, change fee for flight when it was not customers issue that caused the 5 min delay! Unable to reach reservation desk on line or via phone (neither was the gate agent)"
Cons: "Seeing as I’m still waiting for my flight, more than five hours later I am not inclined to rank it highly. This airport is an embarrassment and I will try my best to never fly Delta again. Weather is no excuse for this."
Pros: "It got me home, eventually."
Cons: "Poor communication, a 6 hour delay followed by a 7 hour layover (during which we had to sleep on an airport floor because Delta couldn't offer us any hotel vouchers). Gate agents disappeared after 7pm becuase they were due to be done with their shifts when our flight was originally supposed to leave at 6 pm. It felt like we were trapped in the movie The Terminal. Oh! And our bag was misrouted, because that was just how things went those 2 days. All in all a 6 hour trip turned into 18 hours. I could have driven home in that amount of time!"
Cons: "Check in lines were crazy long"
Cons: "My daughter was stuck in SLC for 5 hours because there 1 cancelled flight and 1 delayed flight. It was very upsetting not knowing when she going to arrive in Denver."
Pros: "First leg from San Diego was excellent."
Cons: "Arriving in SLC discovered out flight to Denver was CANCELLED! Had to reschedule to the next day. Not fun!"
Pros: "App is good and convenient to use."
Cons: "The app went down just as we were getting ready to board and luckily i had a printed pass and it took some extra time to check in."
Cons: "Delayed two hours"
Pros: "Got to my placs"
Cons: "Lol put the two fattest people next to each other"
Cons: "I don't like that I already completed this survey several days ago and have been receiving reminders to do so. I guess you don't have a good system in place for knowing who has and has not completed your surveys. That's too bad."
Pros: "Flight attendants and cookies. That's it."
Cons: "We left DC late because of Delta's inefficient boarding process. We landed in Atlanta late. Our flight to Sioux Falls left early, without us. My pregnant wife and I made it to the gate 4 minutes before the scheduled departure and they told us the plane was already gone and there was no way for us to get on the plane. Our bags did make it to Sioux Falls, so my wife didn't have her prenatal vitamins, , we had no clean clothes and we were forced to spend the night in Atlanta. The saddest part of yet another terrible experience with Delta was that they offered us a "discounted" room at a terrible Howard Johnson for $72. I looked online and the same hotel was $65 to book on Kayak. So basically Delta was trying to scam us after they screwed us. Thanks Delta! Instead we paid $200+ to stay at an airport hotel. Every time I fly Delta I regret it, yet occasionally I get forced to take their awful airline to get somewhere I need to go. It never fails to add another bad Delta experience to my long list of failings from this SAD!!! airline."
Pros: "The boarding process in Atlanta was as smooth as could be expected given that it was a full flight. I appreciated the gate announcer's suggestions to everyone about how to ease the overhead baggage crunch."
Cons: "Economy is very tight quarters."
Pros: "Friendliness of staff. Second flight was a newer plane - sweet!"
Cons: "For a long flight perhaps a little more in the snack department."
Pros: "Crew was all very nice"
Cons: "Flying is always uncomfortable"
Cons: "There delay"
Pros: "Free in flight entertainment"
Cons: "One of my bags went to Santa Fe"
Pros: "The crews were very friendly and everything went as planned. It was a nice flight."
Cons: "I didnt like that my flight was canceled and rebooked for no reason. This created me big problem in Athens that they couldnt find my ticket in delta. Also I didnt like that i had to stand and wait for 3 hours in the line because my flight was canceled but no one could let us know if there gonna be any flights within the day. I slept in the airport because i couldnt find a hotel to spend the night close to the airport. They were all full and i had no time to find one since I was waiting there for 3 hours with no informational. I slept on the floor and delta didnt even offer us a blanket. That was my worst trip ever."
Pros: "Attendants and entertainment"
Cons: "Delays for no explained reason"
Pros: "plane had individual movies for free with each seat!"
Pros: "Nothing"
Cons: "Being scammed by the Chinese, China Southern"
Cons: "We did not board at the scheduled time, although I believe we arrived on time. The crew was demeaning and singled out individuals who were causing the aircraft to not move. It was in a very pretentious manner, not like southwest personnel who have similar antics but with a playful tone. The plane is a small one where bags don't fit overhead and many head bumps occur. We arrived fine which mean the flight was successful but it was not very enjoyable."
Pros: "Left on time, arrived early. Great cabin service, attentive and polite. Comfort Plus seats are worth the extra few bucks."
Cons: "Nothing. Low rating for entertainment only because there really wasn't any, but I wouldn't have used it anyway, so no big deal."
Cons: "There are too many announcements on the screen before you can start watching entertainment. It takes about 15 minutes."
Cons: "Short flight, would have appreciated if when asking for pretzels the flaggt attendant didn't hand me the spare bag of his pockets."
Pros: "Really enjoy flying first class."
Cons: "Excellent"
Cons: "My tray table was dirty. It had crumbs on it. The flight was on time which was awesome."
Cons: "The seats are extremely restrictive and in a aisle seat I had the gentleman sitting next to me with thighs touching and attendants brushing by me as I squished to left to avoid contact with him. Entertainment screen between center seat and window seat so I just didn't even try to look at it and mostly just leaned forward to have a little space. Also another inch or 2 was taken by person in front of me putting their seat back. With such restrictive space why is this even possible??? Flying has become ridiculous and I try not to as much as I can."
Pros: "Good entertainment choices."
Cons: "Uncomfortable seat with insufficient legroom wouldn't recline. Inadequate overhead storage (full flight)"
Cons: "The seat went back three inches. I was about to spasm after 4 hours. No movement whatsoever. The flight crew could have moved me but I suppose they were told not to as I had a cheap ticket."
Pros: "It was standard AA service"
Cons: "After flying in Delta Comfort+, American’s forward economy section is just nothing."
Pros: "Crew was tight, friendly, flight comfortable & painless."
Cons: "We landed early but the plane was late 50 minutes into gate. Plane went pst our gate twice, just driving around the terminal."
Cons: "Sat waiting for gate for 30 min"
Cons: "There was literally no entertainment for over three hour flight and our flight was delayed an hour while we were on the plane."
Cons: "I'm expecting more from AA. We were delayed for 2.5 hr since we didn't have a pilot !!!!!"
Pros: "The crew was polite and professional"
Cons: "At Miami check in, American had 40-60 automated terminals available for self check, but only had EIGHT open for use. Caused a needless bottleneck and the transition from there to the bag drop was also poorly laid out and did not provide a logical nor efficient route from one to the other. fix it!"
Cons: "Speaker volume was too high."
Pros: "On time flight. We were even a little early."
Cons: "Those seats are just crammed in there aren’t they?"
Pros: "Crew was great"
Cons: "Absolutely no accommodation for seat assignments and the lady at the gate was so rude for even just asking to sit next to my fiancé even though there were tons of single people on the flight."
Pros: "The flight itself was fine."
Cons: "The gate change was not announced on my phone app (changed from E7 to D49). I hate leaving out of Terminal E at MIA. There is no point to having TSA Pre-Check if you have to stand in line with people who don't have it. I have to remove my liquids and laptop. It's such a shabby, run-down terminal."
Pros: "Crew was good, flight was on time"
Cons: "Old plane, no TVs"
Pros: "Crew was nice"
Cons: "Not enough leg room. They did a gate change and I almost missed the flight because nothing was announced and when I looked at my phone app it had the previous gate."
Pros: "On time"
Cons: "Tiny seats, no snack or napkin with the drink. Noise in back."
Cons: "Flight was delayed so had to drive to connecting city just to make it home."
Cons: "My bags were not checked all the way to my destination, I had to get them re-tagged and checked for this part of the trip and the American Agent was EXTREMELY rude and made us pay oversized bagge fees even though our baggage was within the Qantas allowance, the main carrier for our flight."
Pros: "The plane looks like new. Great seats, phone and tablet holders at the seat back, USB outlet and a smooth flight."
Cons: "The WiFi did not work and so no entertainment for a flight of almost 4 hours."
Pros: "Friendly crew"
Cons: "Tight seating leg room non existent."
Pros: "Landing and deplaning"
Cons: "Literally everything else"
Pros: "Our plane was given to another group going to Orlando so we were delayed almost 4 hours. This after a 5 hour layover."
Cons: "Gate lady was funny about being pissed about the delay."
Pros: "Great service in first class"
Cons: "N/A"
Pros: "Movie and tv selection was good. Boarding was a cinch, we took off exactly on time, seats were comfortable, too."
Cons: "Airline misplaced my boyfriend's checked back with our duty free Portuguese wine in it. It still hasn't been delivered to him the next day. They had three hours to get the bag on the flight."
Cons: "Flight crew was late and didn’t try and make things move faster to make up time. Kept saying they wanted to go Puerto Rico and that’s where they should have been going."
Cons: "Flight was delayed by 90 minutes because the incflight mint flight was late"
Cons: "The male flight attendant was incredibly rude, kept hitting my arms with his body with zero apologies. No manners when taking food and drink orders. Did not seem like he liked his job and in a customer service atmosphere this was extremely disappointing."
Cons: "3rd flight in two weeks suck sitting next to a morbidly obese person. They should be forced to purchase two seats."
Cons: "the drink service came through pretty late in the flight. i asked for hot tea. a few minutes later i was provided with extremely hot tea. about 10 minutes later it was a temperature i could tolerate drinking. about 1/3 through the drink i was required to throw away my drink because we were preparing for landing. i understand that, fine. bad timing. it’s just a drink. what was unsatisfactory is that the attendant rudely commented “you have to give us your drink. it’s not that long of a flight.” the comment made me feel like i had done something wrong even though i had just been drinking my tea as soon as it was at a drinkable temperature. i was not impressed with the attendant. also, there weren’t any biscotti cookies."
Pros: "The first leg had awesome pasta.Then, on the 2nd leg, Philly to Denver, they had a "pay for meal" option for turkey with Chutney sandwich - again, delicious. I should add that the service was very good as well."
Pros: "Staff was great!"
Cons: "Seats were really uncomfortable up and reclined. Overhead baggage was full by the time I boarded and there was no enforcement of the carry-on baggage sizes... This needs to be addressed and contributed to our lack of comfort, noting this was the last leg of an 18 hour journey. My body still hurts today after a good nights sleep."
Pros: "Plane was new and entertainment was free. Great service too."
Cons: "American has improved a lot"
Pros: "Boarding process and flight crew were just fine - nothing excellent, just average. The plane was an older model, nothing special. We arrived 10 minutes early but then had to wait 20 minutes for a gate."
Cons: "They had no alcohol and no entertainment on a Transcontinental flight from IAD to LAX. Also once we landed we had to wait 20 for a gate assignment."
Pros: "No excuse on a night flight does the temperature to be 80 plus degrees on the plane."
Cons: "The plastic seats and extreme temperature was brutal. They shut the AC off of down somehow."
Pros: "entertainment displays on the back of every seat headrest. Nice room on Main Cabin Xtra, even with someone in the middle seat."
Cons: "1 of the flight attendants was pushy(older caucasian lady)"
Pros: "Boarding the plane from the back first saved longer queues. Unfortunately people cheat and the boarding officers don't send them back to the right queue. Toilets were clean. Staff excellent. I was glad all my flights were stuffed to the gunnels. Presumably that is best for the environment rather than lots of planes with fewer passengers in each."
Cons: "Passport control with new computer ID checks was fast. Baggage was slow coming. I booked through Netflights and they didn't book me a good seat. If I could have changed it myself they should have told me. On the way to Tampa on 3rd March I couldn't check in within 24 hours and had to wait half an hour while they changed our plane. BA used to do short science programmes which I loved. Shame these have finished."
Pros: "Entertainment."
Cons: "We sat on the runway for 3.5 hours while the crew cleaned up a fuel spill and we waited for a different co-pilot."
Pros: "I fly this route with American pretty often. The cabin crew was good. Everything else seemed sub par."
Cons: "Our take off was delayed, officially due to fueling the plane, but if the plane wasn't fueled ahead of time, someone failed to do their job properly. Also, while I'm starting to think that A320s just suck mechanically for landing (they always seem to land harder than a 737), this one seemed a little extra rough."
Cons: "Unexplained delay in leaving but only arrived about 10 min later than scheduled. Took an hour from pulling into the gate for bags to arrive though which caused me to miss my shuttle. Never had to wait more than 15 min for any other airline at DIA."
Cons: "They did not check the toilets before we left so we were diverted to St. Louis and I arrived in charlotte 3 hours late"
Pros: "Friendly, helpful flight attendants. Flight left and arrived on time, despite being completely full (asking for volunteers to bump). Offered to gate-check our carry-on bags for free to alleviate crowding of overhead bins was fine for us since we already had checked baggage."
Cons: "If you don't pay for the premium seats, the legroom is pretty tight. I'm only 5'8" and I felt it -- if you're 6'+ you better pay for it. This aircraft had screens, but not individual ones so you're stuck watching whatever sitcom replay they pick, although there is a moderate selection of other music. I've been on a newer aircraft with the in-seat power and interactive screens so I know how good it can be, so this was a little disappointing."
Pros: "Flight not entirely sold out. So they let my 14 month grandson have an empty seat between my daughter and I. That was a great gift since he doesn't sleep and is jumping and crawling all over the place. And I'm sure the other passengers were breathing sighs of relief!! Also super smooth landing and nice flight attendants."
Cons: "Flying with an active 14 month old toddler boy and of his "stuff" is nothing less than anxiety provoking. Not much the airline can do.."
Cons: "When your on your honeymoon it sure would be nice to have a seat next to my husband like we requested."
Pros: "I did like sitting on the left side of the plane. There's a little more room. I feel it's horrible how the airline charges so much and cram so many seats in one air craft. Making it a miserable flight."
Cons: "See above"
Cons: "no food"

Delayed over eight hours!

Short flight, 30 minutes, so food was not provided. Not sure how to answer the food emoji

Pros: "This flight was cancelled"
Cons: "Hire better competent people"
Cons: "Wider seats and more leg room"
Cons: "United express flight Tucson to Denver and Denver to Tucson...feet were freezing on both flights."
Pros: "Not much, don't really like flying at night. The crew was nice enough."
Cons: "Our flight to Denver was delayed by 3 hours, so I had to wait for 5 hours. Supposedly we were waiting for another plane because the original plane had a damaged wing. Who knows if these things are true. Maybe they just don't have enough pilots. I missed my connecting flight. Less time unboarding"
Pros: "Crew and entertainment."
Cons: "Offer more food and beverages due to long delay and sitting in the plane for over an hour before take off."
Pros: "We made it home safely and on time."
Cons: "We were sat in the very last seats near bathroom which was noisy and uncomfortable. I actually paid an extra charge so we could be sat together. In flight entertainment didn’t work in my seat. One piece of our luggage was lost."
Cons: "Flight was delayed by 3 hours. Seat bottoms are very short on this plane--several inches shorter than normal."
Pros: "Crew was pleasant and did their job well"
Cons: "The de-ice took way to log and not enough leg room"
Pros: "Good experience. Brought my own entertainment. Comfortable seats for economy cabin. Friendly flight attendants"
Cons: "Second standby adventure of the day got longer as inbound flight was late."
Cons: "Gate agent ‘bag Nazi’"
Pros: "The pilots were informative with their announcements and we were informed of turbulence before it started. We also got in ahead of schedule. I also appreciated being able to ask for a glass of water between services as I had fallen asleep."
Cons: "The negative experiences started before we got on the plane. Boarding began slightly behind schedule and was very disorganized. People were all standing in the boarding area and out into the walkway for the concourse. I feel it would be better to have boarding groups come up individually or two at a time. (While group one boards, group two convenes. Once group one has boarded, invite group three to take their place.) Once group three had boarded, an announcement was made that there was no overhead bin space availble for the entirety of group 4. It seems a bit ridiculous that nearly half the plane wouldn’t have overhead space. It took awhile to board group 4 as everyone had luggage to check and once we finally got down the jetway, we had to wait another few minutes before being able to get to our seats as the flight attendant for first class insisted on taking drink orders while she stood in the aisle. I understand this is a perk of first class but I feel it could be better executed. These seats are boarded in group one so to have drink orders incomplete by the time group four is trying to board is irritating at best and incompetent at worst. Once finally at our seats, it became apparent that the announcement about lack of overhead bin space had been made a bit early. The bins were on the full side but they definitely had space available. Also, much of the space had been taken up by jackets and bags that would have fit under the seats; which I felt could have prevented nearly all of the checked bags. The flight was uneventful with minor annoyances like having to pay for entertainment and any sort of food. Even southwest provides entertainment free of charge and I consider them to be more of a budget airline. If I fly Lufthansa again, I will not take a domestic flight through United and will instead book via southwest to and from the international airport Lufthansa flies out of."
Pros: "Leg room 7 aisle"
Cons: "Pretzels on a 4 our flight? There should have been some food"
Cons: "Never made it on that flight"
Pros: "I made it safely to my destination"
Cons: "I have been flying Lufthansa for over 15 years and the service is steadily declining. It started with issues during online check-in, a delay in Frankfurt which resulted in a very tight connection. I had to leave my bags behind to make it and the ground personell was of zero help. Oh, and premier silver status is good for nothing on Lufthansa. Thanks StarAlliance."
Pros: "The flight was on time"
Cons: "This was a smaller plane (4 seats across). Knowing this, they didn't bring enough luggage carts, so they only brought some of the luggage to the baggage claim and didn't tell us this. 5-6 of us waited and waited and finally asked someone who told us that they had to go back to the plane to get the rest of the luggage. Those of us still waiting got to wait another half hour for our luggage. Talk all they want, United just can't seem to get it right. PS: those of us who had to wait were the ones who got to the San Antonio airport the earliest and thus our luggage was on the plane first."
Pros: "Arrived almost an hour early which was great."
Cons: "Flight was delayed for a hour and half because of equipment. Credit goes to United for promptly putting use on another flight that just came in from Denver. All in a it was a long day."
Pros: "Comfortable seats"
Cons: "Boarding took a long time in the plane. There was confusion as they had passengers going both ways in the aisle .. this forced several ppl to stand in the aisle a long time. One of the air hostess had a major attitude. For example one passenger who was stuck in the middle of other passengers asked her politely if she could help him put the carry on in an overhead bin near her .. and she responded "I cant help you, you need to put it up yourself sir". Not something one expects. She was also terse with passengers, ordering them in an annoyed tone."
Cons: "Boarding at Dulles was stupid. The line for 1st class and Premier was against the wall, so these passengers had to fight their way through the lines for passengers in sections 3,4,5 just to get to their line. It would make more sense to have groups 1 & 2 in lines which face the door, and keep the lines for 3,4,5 as they are--that is, parallel to the wall. Or, have the lines in the opposite order, so that 1&2 are closest to the concourse, and 5 is next to the wall I actually felt sorry for these 'privileged' passengers who had to fight their way through the other boarding lines just to board when their section was called"
Pros: "Your seating was spacious!"
Cons: "The unfriendliness of the crew."
Pros: "Everything"
Cons: "Nothing"
Pros: "I wish it was always this easy."
Cons: "I wish the seats and leg room could be a little more generous for those of us who don't fly first class."
Pros: "Not much. We did arrive alive, which is the best part of it."
Cons: "Late, very late without any explanation. Only one food service in flight."
Pros: "The boarding procedure, and flight were completely uneventful. Flight attendants were nice. Slept through the snack if there was one offered."
Cons: "Seatback entertainment by directv is getting a little old at this point. I didn't test it but I believe you can watch content on demand on your own device instead but it's hard to keep the seat back screen turned off. Be weary of tight international to domestic connections at IAD. I had an hour and a half between flights and made it to the gate when they had called group 5 for boarding. This is with Global Entry, TSA Pre-check and priority tags on my bags. I'm sure many others without the above were not so lucky."
Cons: "I had a man sit next to me who was in the wrong seat but didn't move. He told the girl to keep his seat and he would stay next to me. He was so big he was in my space and had didn't make any effort to try not to spill over in my area. I had to put a magazine next to my thigh because his body was so hot it was damp! I hated the entire trip. I was cramped up and extremely uncomfortable. This is simply unacceptable to have this happen because huge people can't fit in one seat. I want these obese people to be required to purchase 2 seats because they take mine."
Pros: "Well, the plane didn't crash, so that was nice. The plane was clean and the newer 737-900s are pretty decent."
Cons: "Every time I fly United, I pretty much feel like it is an honor on the level of being knighted to get the privilege to fly with this airline. Thank you so much for being willing to take my money in exchange for a service, United. Bless you. I'm sure if you spend $10k + a year with them, they'll happily massage your feet as you ride along, but anyone else seems to be each flight attendant's personal enemy that they must frustrate as often as possible. Also, thank you, United, you beautiful prom queen you, for changing my seat from a window to a middle because it pleased you. It honors me to be your jest."
Pros: "Pilot made up for a late departure & we arrived in Denver a few minutes early. Skies were abut rough for a short time."
Pros: "The flight crew was welcoming and friendly throughout the flight. Even the pilot walked through the plane and chatted with the passengers prior to the flight and also made an announcement wishing a young boy a happy birthday from the flight crew."
Pros: "Nothing I won't be flying united again!"
Cons: "The lady at the gate when boarding was not friendly and was not willing to help us get seats together. I was traveling with my mother, husband and two infant children. And it was like pulling teeth to get any information out of her. She did not even tell us we could board early to get situated on plane! I also called earlier that morning and spoke with a man on he phone at united who told me he put us all in the same row. That was a lie bc when we checked in at the gate to get our seats the lady said no one was sitting next to each other! That lady was rude and short tempered! Awful experience will never fly again!!"
Pros: "Security was quick and efficient. Boarding was extremely organized. The airline attendants were attentive. The pilot on United informed us when the possibility of hitting turbulence occurred so we could adjust accordingly. Overall, great travel experience."
Pros: "The stewards were nice and they were prompt. The plane seemed to be well cleaned inside and they were quick to get everyone boarded and bags stowed underneath. The pilot knew what he was doing and I had no worries there. Everyone was doing their jobs as well as they could be done."
Cons: "The air nozzle above my seat was broken and would not turn off so I freezing the entire flight, as well as the tray table seeming like it was meant for the lap of an infant versus myself and I can't imagine how someone with longer legs than myself dealt with the way it folded down. The take off was rough either seemingly due to tires or perhaps a rough runway. The wifi on the plane would not work. It worked ok my first flight but not on the second. I don't know why and no one knew why either, had the latest app and it was updated to the current version."
Pros: "I liked that they were polite and friendly during the national United flight groundings due to the computer error."
Cons: "I did not like the terrifying situation in which the pilot said we would be landing in 15 minutes (at this point we were close enough to the ground that I could see cars ) but then without any further announcement proceeded to point the plane upwards and started flying up up up so that all the city lights disappeared and all I could see were stars next to us. I asked 2 different flight attendants wtf was going on and they both said "oh he's just looking for smooth air" which was clearly BS because I was in the very last row of the plane and if there had been rough air I would have been the first to feel it. After inexplicably shooting upwards for what felt like an eternity we finally turned around and ultimately landed and guess what, no rough air to be found. Now I know why airplane pilots update you all the time, because when he pulls a maneuver like that without any warning it is terrifying and all I could think of was the suicidal dude in Germany from Lufthansa. Not cool. Other than that the flight was fine and they were really nice despite the like 3 hour delay or whatever it was. It cost me an extra $60 cause I arrived so late my husband and baby couldn't pick me up anymore but they offered a credit for a future flight so it's ok. I appreciate the gesture."
Cons: "Boarding was late, then, after boarding, we were advised leaving was delayed due to no fuel service available, then other problems arouse, over all, we sat at the gate for over 2 hours before take off."
Pros: "Crew friendly, but every thing else simply as usual."
Cons: "No meal if you can' afford first class."
Pros: "Great and attentive."
Cons: "Seats were a bit uncomfortable although very clean."
Pros: "We ran from customs to our gate with 7 minutes to spare."
Cons: "My seat belt appeared to be on the verge of fraying. Too bad we would have to pay for entertainment. It was free on the international flight. The seats were old, narrow and did not have much padding."
Pros: "Nothing"
Cons: "I'm usually a patient person, but my flight was supposed to leave at 525am and didn't leave until 730. This was the first flight in the morning. We boarded, waiting 30 minutes on the plane, they told us to get off because there were computer issues. Why wasn't that checked before everybody was boarded? Once we got on the plane we had to wait another 30 minutes for the crew to get someone's luggage from under the plane. Why wasn't that done while the computer was getting fixed? I didn't get to Denver until 1040am missed my flight and didn't get to get on my connection until 500pm. In the meantime I called to get on a different flight at 1, but the guy on the phone didn't actually book me a seat. The gate people weren't very nice."
Pros: "Easy to board and check in, good price"
Cons: "It was extra to check luggage"
Pros: "Everything was fine"
Cons: "Na"
Pros: "Boarding, crew"
Cons: "Stale bag of snacks, expensive options for entertainment were a little co fusing as far as directions go."
Cons: "A la ahora de irnos hubo muchos contratiempo por el tiempo pero por el vuelo después que nos fuimos fue excelente"
Pros: "It's seems like no one cares about passengers in this airline.... Rude services"
Cons: "Sorry, I can never give comfort a rating above poor as long as airlines keep making economy class seats smaller and smaller."
Cons: "The leg room was terrible."
Pros: "Very friendly and helpful staff."
Cons: "The fact that we had a connecting flight to minot from Denver. Arrived late to Denver because of weather, but my stroller that I had left on the jetway in Seattle was never put on the plane which I didn't know until I got to minot. I was going to wait for it in denver, but I would have missed my flight to minot had I waited 5 more minutes. We arrived to minot only to find out that our 3 suitcases, one stroller and 2 car seats were never in the flight. Awful! And my connecting flight was even delayed an extra 55 min so I don't quite know where my things are."
Cons: "Male flight attendant gave male psgr next to me 4 bottles of scotch free for having to sit in last row, yet the other 5 of us in last row were not offered anything like that. When psgr next to me became drunk he apologized and needed our help finding his connection when he got off plane."
Pros: "The stewardesses were kind."
Cons: "United didn't even try to hold my connection even though I could have made it if they held it 10 minutes (and it had no further connections). Instead they sent it out early. They had no other flights to my destination until 3pm the next day. The hotels were full and no rental cars were available."

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5h 58mDEN-IAD
$386
9/17Sat
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8h 42mIAD-DEN
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1 stopAmerican Airlines
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$387
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1 stopUnited Airlines
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2 stopsAmerican Airlines
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1 stopDelta
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5h 30mDEN-IAD
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3h 21mDEN-IAD
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1 stopUnited Airlines
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$383
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8h 18mIAD-DEN
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7h 45mDEN-IAD
$384
10/8Sat
1 stopDelta
6h 27mIAD-DEN
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1 stopDelta
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9/17Sat
2 stopsAmerican Airlines
8h 42mIAD-DEN
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1 stopAmerican Airlines
7h 36mDEN-IAD
$387
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1 stopUnited Airlines
5h 25mIAD-DEN
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nonstopUnited Airlines
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$388
9/28Wed
1 stopAmerican Airlines
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10h 57mIAD-DEN
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Washington Dulles Airport - Denver Flights

Departure:

Washington Dulles Airport (IAD)United States

Destination:

Denver (DEN)United States

Return flight deals:

Denver - Washington Dulles Airport

Cabin classes:

$640
$698
$1,000
$342

Browse destinations:

$321