Find cheap flights from Washington to Colorado

Find cheap flights from Washington to Colorado

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Round-trip
Economy
Boston (BOS)
Colorado
Thu 8/5
Thu 8/12
Any month
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Good to know

Low season

AugustBest time to beat the crowds with an average 6% drop in price.

High season

DecemberMost popular time to fly with an average 18% increase in price.

Average price round-trip

$480(avg. price over the last 2 weeks)

Good deal round-trip

$77or less

Good deal one-way

$45or less

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Top 5 airlines serving from Washington to Colorado

Scores according to KAYAK customer reviews

8.3
Alaska Airlines
Overall score based on 29,525 reviews
8.5
Boarding
8.3
Comfort
8.8
Crew
7.9
Entertainment
7.9
Food
Airline reviews

Cons: "Delayed boarding but received notification from Kayak was good."

Pros: "Aircraft was clean and comfortable. Crew was efficient and friendly. The whole experience was excellent!"
Cons: "There was lots of entertainment available but plain old music was not an option. What if I don't want to watch a movie or TV, just listen to music!"

Cons: "Seat cushions are too thin."

Pros: "The seat was comfortable and the plane wasn’t over booked."
Cons: "I didn’t like that we took off an hour late."

Cons: "Two rows up from us, I kid threw up all over the center aisle as we were pulling away from the gate. We returned to the gate to allow a cleaning crew to board and clean. However, the cleaning job was rushed and left remnants of the throw up behind which smelled the whole 2.5 hour flight. It really felt unsanitary and unsafe being that it’s unknown what caused the child to get sick. It very well could have been a stomach virus and could have infected the people in rows around the incident due to the mediocre cleaning job. I understand that it’s important to keep flights on-time, especially for connecting flights, but the safety of the passengers and their health should ALWAYS be the #1 priority."

Pros: "Comfortable seats with nice details; power ports; drinks and snacks."
Cons: "Boarding in Seattle was ridiculous. Security took a massive amount of time, and we barely arrived in time for th flight despite arriving hours early. The attendants at the gate were a bit rude and begrudgingly accommodating."

Cons: "Employees who just don't care"

Cons: "I missed the flight"

Pros: "Management as well as staff nice...First trip with Alaska and made my trip nice .. Got a good deal price too."
Cons: "Nothing."

Pros: "Plane very warm, not comfortable. Only one pass for beverage service."
Cons: "Very warm air vents did not work."

Cons: "boarding was late due to repairs on the plane"

Cons: "i wish Alaska would fly straight to Denver from Montana. I fly from Montana to Denver a lot and it ends up being a whole day of travel instead of a couple hour flight."

Pros: "It was a short flight. The overhead bins weren't overloaded."
Cons: "Boarding was a hassle. The flight was too crowded. The food was non-existent.. Seats were uncomfortable."

Pros: "It was on time and friendly"

Cons: "Two out of three USB ports would not hold cable on my premium seat row. Would not recommend if something as simple as USB port inoperable is not handled by cabin service or maintenance. We paid additional fees for this seating and couldn’t keep device charged. Very disappointing"

Pros: "I didn't have to set next to a 500 pound cow."
Cons: "Your beer and wine is sooooooo expensive."

Cons: "Food and wine way over priced."

Pros: "Brand new airplane with comfortable Recaro seats. Great food and wine. Excellent service."
Cons: "Nothing. Alaska Airlines provides the best service available."

Cons: "45 minute delay due to fog"

Pros: "I'm a big fan of Alaska Airlines and their partner Horizon Airlines. I travelled from Edmonton to Denver via Seattle last night. All the staff if pleasant and treats you as a valued customer."

Pros: "Friendly staf. comfortable seats. And no charging for checknig my bags."

Pros: "Boarding was a breeze, crew communicated well, seats were comfortable, plane wasn't too hot or too cold"
Cons: "Had a problem with checking my baggage in anchorage which led to $300 being held from my account for 5 days. They refunded my baggage fee though"

Pros: "Everything but…"
Cons: "You lost my backpack with $2000 worth of hiking gear that I will not be able to replace before I am supposed to leave on a trip. How could this happen?! This bag was full of all the material possessions in the world that matter to me."

Pros: "Friendly staff. Made up time after a mandatory tire change."
Cons: "Other passengers not listening to the staff."

Cons: "No legroom unless you pay more for it."

Pros: "How friendly and professional"

Pros: "On time and effortless."

Pros: "Able to text ..."
Cons: "No Free beer or alternative gluten free snack"

Pros: "Everything"

Pros: "The plane had the usual wifi, drinks and eats. But USB ports and plugs in economy! That's value!"

Pros: "Flight crew was courteous."

Pros: "It was easy to board and a quick flight overall amazing"
Cons: "Just the people next to me taking more room then need but you hace no power over that."

Cons: "Gate 11c."

Cons: "Nada"

Cons: "not able to know my seat till a day before flight ."

Cons: "Service was amazing"

Pros: "entertainment"
Cons: "very rough landing, delayed flight with little communication"

Pros: "Great service and very organized."

Pros: "price"
Cons: "delayed"

Pros: "Early flight, and short. I think I slept through it. Woke up sore, but eh I'm not surprised by that. I'm a giant and no one woke me up for anything so I was satisfied."

Pros: "The crew and captain were amazing and very apologetic!"
Cons: "I paid an extra $300 for preferred seating because I wanted the extra legroom to sleep. I'm over 6 feet so coach is very uncomfortable. My girlfriend and I got in our seats and 10 minutes later, a crew member walked back and asked us to get off the flight. We got off the flight and were met by police officer. Low and behold, the woman sitting next to us said that she believed we were intoxicated and feared for her safety. I am a police officer and my girlfriend is a nanny/preschool teacher. Not very threatening. The officer on the ground looked us over and asked us a few questions and determined we were not intoxicated and we were no threat to the other passengers. The airline asked us to get back on the flight and we would be sitting in coach because the woman adult children were now sitting in our seats. I told them to book us on another flight with the same seats that I PAID for or put us back in OUR seats on that same flight we just got kicked off of. We were escorted back onto the flight and the crew asked the woman's children to go back to their seats so we could have our seats back. They then asked us not to speak to the woman sitting next to us (which we never did to begin with!!!) and then told us we could have free food and drinks. The whole experience was insanely embarrassed and I can't believe that woman sitting next to us can get away with what she did. I am absolutely livid that they would ask us to get off the flight and then give our seats to the woman's ADULT children without vetting the situation and making the easy determination that we were NOT intoxicated. So embarrassing!!"

Pros: "Glad I discovered Alaska Airlines!"

Pros: "It got cancelled due to 3 inch of snow. And I missed work in Denver because of it. Very inconvenient"
Cons: "I would like to not have it cancel"

Pros: "Offering price"
Cons: "Real price. Ridiculous after carry-on and other fees"

Pros: "Attendants were very friendly and flight arrived early."
Cons: "We were stuck on the runway for 30 minutes."

Pros: "Newer aircraft"
Cons: "1-1/2 hours delay, no reason was given."

Pros: "Ditto statements above"
Cons: "Ditto statements above"

Cons: "I have been on two Alaska Airlines flights on this trip. Neither had any form of entertainment. One flight was 6 hours long and offered to rent out ipads for $17."

Pros: "Promptness of flight"
Cons: "Cramped seating"

Pros: "My favorite airline to travel from Denver to Puerto Rico, round trip, and in Atlanta I will make the stopover, I also feel so safer to travel with my cat ... they are the best airline in everything"
Cons: "Let people who travel with pets earn extra points for taking them with Delta"

Pros: "Delta is doing a great job keeping everything calm and clean during this pandemic!"

Cons: "Nothing all excellent"

Cons: "It was great! Nice job Delta !"

Cons: "flight left without 1/6 of the passengers. ¯\_(ツ)_/¯"

Pros: "Amazing"
Cons: "Nothing"

Cons: "It was fabulous as always! Thank you. I love Delta!"

Cons: "My flight was delayed almost 3 hours. Not good. Once in the air it was fine."

Pros: "The cabin was to warm"
Cons: "The cabin was to warm"

Pros: "The crew was great and the free entertainment was great"
Cons: "Bring back pillows and blankets especially on red eyes out of Anchorage"

Pros: "Everything! Thank you"
Cons: "Nothing. Thanks"

Cons: "Food really bad on both segments."

Cons: "Compared to Virhin Australia crew, Delta staff seem almost poorly trained in comparison. For example, Drlta crew don’t check your pass, don’t immediately move down the aisle to move along tourists busy discussing their seats and then line up for Boarding seems chaotic at best."

Cons: "No meal option and my video screen volume did not work"

Pros: "Nothing"
Cons: "Nothing"

Cons: "Departure delayed by 1hr30"

Cons: "N-S"

Pros: "Boarding was quick"
Cons: "No entertainment, plane was small"

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: "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."

Pros: "."

Cons: "Did not serve the food we asked Limited choice of movies"

Pros: "I loved flying delta comfort. I’m going to do it more often."

Cons: "Old cramped untidy and limited drink service"

Pros: "Nothing"
Cons: "Multilpe delays"

Pros: "This was our first time flying Delta and it was a very pleasurable experience. Boarding was very straight forward and the seats allocated comfortable. A surprise for us was being asked if we would like to move seats from the back of the aircraft to Comfort Economy (we think it was to do with weight balance! but appreciated very much none the less). The flight attendants were very professional and helpful, as you would hope all attendants on all airlines would be. We'd gladly fly Delta again anytime."

Pros: "In a pinch they were able t"

Pros: "Great"
Cons: "Too many announcements"

Pros: "Alaska Airlines is way overpriced and way less comfortable than Delta. I’m a Delta loyalist forever now!"
Cons: "Nothing."

Pros: "Nothing really"
Cons: "Flight delay further to the 30 minutes additional 20 min due to crew being not there"

Cons: "We waited 3 hours for the tarmac in Seattle On Christmas"

Cons: "Too crowded."

Pros: "free texting and entertainment!"
Cons: "our flight was delayed half an hour."

Cons: "No drink or snack service. No trash pick up. No option to purchase or rent headphones"

Pros: "Fast and efficient boarding again! Most impressed!"

Pros: "everything was very nice"

Cons: "Excellent service excellent pilot"

Cons: "As a Platinum AFK/KLM Skyteam member I was NOT allowed to use the Delta Lounge. On the flight the meal choice was poor and the staff were not really geared to serving regular clients. The movie choice was poor. I expected better!"

Pros: "Enjoyed food and movies.Woul"
Cons: "Would like more comedy or romance movies. Becky"

Cons: "Late and missed my international connection"

Pros: "I love the new snack choices! Way to go Delta for offering Kind bars now!! This is awesome."
Cons: "Tiny old plane, props blocked my window view, no entertainment system."

Pros: "Very friendly and helpful staff."

Pros: "The staff of the flight were very friendly and attentive. They were great!"

Pros: "Very attentative."

Cons: "Aircraft was smelling bad! Hygiene is the key"

Pros: "Very professional and caring."

Pros: "Helpful staff. Never felt rushed if I had a question. The special meal (VLML) was excellent. Tasty, filling and nutritious Plenty of foot room in economy."

Cons: "I've only experienced delayed flights with Delta ... and this was no exception. It wasn't weather-related, nor a late flight delivering a plane - just no ground crew to service the plane between flights."

Pros: "nice snack"

Pros: "Nothing. Delta sucks!"
Cons: "Poor management prior boarding"

Pros: "Crew was great."
Cons: "turbulence"

Pros: "1st class flight attendant sat through the entire flight (except for offering drinks and food early in flight). There were passengers NOT wearing masks through the flight but she wouldn't know that since she never left her seat"
Cons: "just about everyting"

Cons: "IFE was not streaming movies, WiFi on but not loading"

Cons: "Spacing people out until this covid is over"

Pros: "Everything was great"
Cons: "Nothing"

Pros: "Appreciated the pilot keeping us informed re: turbulence and avoiding it"

Pros: "I loved everything! Best flight experience in a long time. Really easy, on time, great window seat, thank you"
Cons: "Me probably. You guys were excellent!"

Cons: "The aadvantage app kept crashing so we couldnt watch movies during our overall 8+ hrs travel, on both legs"

Pros: "Nothing"
Cons: "Not allowed unleashed dogs to take my seat or be in my flight"

Cons: "The plane had a mechanical issue that they needed to address (due to the fact that they prior crew did not address it) and we sat in the gate for 2 hours waiting. No worries water was offered by crew and the flight had no food."

Cons: "Flight got delayed. We paid for assigned seating for our almost 85 yo mom. And the change in flight no one asked for to get seated in the front of plane. Instead she was seated all the way in the back. It was physically exhausting for her."

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 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: "Overhead bins were newly done with plenty of space since carryon can be placed vertical on side. Decide holder built into the seat was very nice."

Pros: "Nice staff"

Pros: "Pleasent"

Pros: "Pretty standard flight"
Cons: "Inconvenient timing and overcrowded with obnoxious children sitting on laps. No attempts made to change their behavior by crew or parents."

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."

Cons: "3+ hour flight with no TV/ entertainment"

Pros: "Not using kayak."
Cons: "Worst flights in history. It took three days to get from Italy to the US. Do not use kayak!"

Pros: "They got us there quickly."

Pros: "Ahead of schedule"

Pros: "Seats were too tight and too close together."

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."

Pros: "Nothing in particular"
Cons: "Outlet did not work"

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."

Pros: "Nice people"

Pros: "Same"
Cons: "Same"

Pros: "Courteous professional staff!"
Cons: "I couldn't imagine a smaller space for traveling - rediculously small!"

Cons: "there was screens but no movies or anything"

Cons: "Everything. Had to sleep overnight in airport and was late coming home."

Pros: "Wonderful, again. Will fly American any chance I get!"

Cons: "No tvs!!"

Cons: "the new seats are awful"

Pros: "Tv and power outlets"
Cons: "This one attendant didn't get her name but was very cold to me"

Cons: "Long delay"

Pros: "Crew"
Cons: "Small plane"

Pros: "Good serice,"
Cons: "Good service to switch flight pattern from greenville to new bern but still a delay that cause a 2 flight connection. Lots of on-line issues with check-in, overall a stressful day, hopefully it will all work out!"

Pros: "More improved than the last trip I took with AA to Denver. Efficient boarding."

Pros: "Everything"

Cons: "The flight was 3 hrs late, of which 1.5 before boarding, and almost 1.5 stuck in the plane."

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.."

Pros: "Cheap. Easy. Got me to my destination"

Pros: "Crew"
Cons: "Had to board three times, two different planes. I understand mechanical problems, but 3 hours later, and on another plane, the captain starts making stuff up, saying that the only reason we hadn't moved in the last hour was because people were using the bathroom, then something about having to deplane because the plane couldn't back up with us on it because of some sensor? And then, surprise ! All of the sudden they noticed there was an issue with his and some of the crews' hours and we had to wait till they could locate more crew. But they gave us each a 1/3 glass of water and later a $12 food voucher which didn't even cover a meal and beverage. Whoop-de-do. 7 hours later we finally boarded for the third and last time. The crew on the other hand stayed professional and friendly."

Cons: "The only downfall of the flight was the seating. Having to pay extra for an emergency exit row to get more leg room isn't good practice."

Cons: "Seats too small and the gentleman next to me was a big guy so crowded over into my seat some."

Pros: "Very friendly staff"

Pros: "The plane was new on the interior and comfortable."

Cons: "The customer service from AA representitives in the airport was completely unnacceptable and the absolute worst service I have recieved in an airport to date! One incident during this trip was as follows: When arriving in Charlotte and running to catch my connecting flight, I arrived as the lady at the desk was closing the door, she looked at me and rolled her eyes. When I went up to the desk along with the other passengers arriving from the same flight as me the AA representative said "Hurry up , I want to go home!! At a point I'm just going to cut you off and that will be it!" She was of no help to me in anyway amd was forced tonstay the night in charlotte ; Normally this would not have been such a big deal, However I am on emergency leave from the Navy rushing home because I have a very serious family emergency, that representitive was very lucky I held my temper! From now on thanks to the poor unproffessional customer service I received I will no longer be flying American Airlines!"

Pros: "World class"

Pros: "The text messages from United"

Pros: "Minimal amount of announcements"
Cons: "Seat was uncomfortable and toilets were in need of cleaning."

Pros: "Yes"

Pros: "Fast and friendly"

Pros: "Good job"

Pros: "Very helpful assistance staff, food and drinks delicious, excellent service onboard"
Cons: "At Denver assistance hadn’t been arranged"

Cons: "Only bathroom on the plane was closed due to issues. Plane was cold and cramped."

Cons: "What happened to complimentary snacks?!"

Pros: "New flight was amazing from Everett"
Cons: "Highly recommend fly from Paine Field"

Pros: "Nothing"
Cons: "When I spoke to the United person last week to confirm baggage and carry on requirements. He said I could take a carry on when I turned up to the gates I was charged another fee for my carry on bag. What is baffling is that when I arrived at Denver people were getting complementary check in baggage. I’m so dissatisfied with the booking and the amount it has now cost me ruining any savings I’d had for sanfrancisco"

Cons: "Delays in flights were a disappointment"

Cons: "Missed connection due to mechanical"

Cons: "Crowded planes."

Pros: "Everything was very nice."

Pros: "Everything was on time and all the staff were professional and friendly"

Pros: "The variety of movies"
Cons: "No daily wifi"

Pros: "Not much. Did not get some"
Cons: "Delayed and cancelled"

Cons: "The temperature on the plane was cool."

Pros: "Fast easy."
Cons: "Pricey."

Pros: "good planes, smooth ride"

Pros: "Nothing unusual every was smooth"
Cons: "Not applicable"

Pros: "Nothing"
Cons: "Everything"

Pros: "Staff was nice!"
Cons: "I didn't like the luggage restrictions associated with our tickets."

Pros: "Curtial personnel"
Cons: "Late departures both ways."

Pros: "It was fine."

Pros: "Nothing"
Cons: "Nothing"

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: "Got there on time."
Cons: "Private screening does not work well. Very little kneeroom. No room in seat back pockets to put anything."

Pros: "Suitcase arrived at the carrousel on time , much better than Houston."

Cons: "Delayed and got downgraded without refund of difference"

Pros: "United payed for the room and 20 bucks for food."
Cons: "Late. Missed the connection to Gillette and had to stay overnight."

Pros: "Sucks"

Cons: "Unreliable wifi."

Pros: "There was more complimentary snacks available."

Pros: "Getting off the plane"
Cons: "Bathrooms weren't working, huge lines in aisle, lackluster service. Overhead bins were full by Group 3. late takeoff."

Pros: "They worked me into the next morning out of Bismarck"
Cons: "Lack of hotel. They did not even offer a hotel."

Pros: "United seems to be recycling which is a good thing."
Cons: "The obnoxious child sitting behind me. He kicked the seat and pulled on the tray."

Cons: "Didn't receive my carry-on when arrived in ELP. Finally got it the next day."

Pros: "Everything went smoothly"

Pros: "Quick boarding"

Pros: "It was fine!!"

Pros: "New plane, wifi, arrived 27 mins early"

Pros: "Cancelled."

Pros: "Perfect, but I did upgrade to United's business plus."

Pros: "I recoment it..."
Cons: "No complementary food!!!"

Pros: "We had a good trip. Thank You All"

Cons: "Lost all my luggage"

Cons: "Alcohol was to expensive"

Pros: "Relatively easy to change flights due to weather delays"
Cons: "United personnel did not seem too chipper."

Pros: "Some staff tried to be helpful and we kind."
Cons: "We were bumped off our connecting flight by a Frontier staff member in Spokane, WA, and then had to pay $60 each to get on the flight we were originally supposed to be on. Will be calling to see about a refund."

Pros: "I made it to my destination"
Cons: "It’s Frontier so it’s not supposed to be amazing. Not having to pay for a drink of water would have been nice though.."

Cons: "Being able to cancel without paying extra"

Cons: "A soft drink that doesn’t cost money!!"

Pros: "Everything"
Cons: "Nothing"

Pros: "Nothing"
Cons: "Window seat and a beverage"

Pros: "Is good"
Cons: "Yes"

Pros: "Nothing"
Cons: "Everything"

Cons: "They need to stop having so many delays"

Cons: "Bathroom was beyond tiny"

Cons: "So grateful for all of the help we received!! Thank you!"

Cons: "Ridiculous surcharges, no water, no coffee"

Cons: "Check in"

Pros: "Frontier was smooth and efficient, didn’t have any issues."

Pros: "Nothing"
Cons: "2 hours delayed flight. No one behind the counter to discuss it. Seats are hard with no head support and they do not decline, there is no in-flight entertainment, no free drinks, complimentary snacks are limited and bland. We must have sat on the tarmac for 40 mins before departing, and upon arrival waited on the tarmac for another 30 mins. The longest two hour flight ever. I know Frontier is a coach airline but why isn't there any televisions, or even a magazine to kill time?"

Pros: "Nothing"
Cons: "Delays, gate changes, lack of notification, last minute changes."

Cons: "Frontier is an airlines that doesn't care about its customer. Period!"

Cons: "one hour late"

Cons: "Late again"

Cons: "I had to pay $50 for my bag"

Pros: "I did not like anything about this trip. The check in process was a pain. The boarding was chaos... (Of course, same 2 careless ladies were in charge."
Cons: "I did not like anything about this trip. The check in process was a pain. The boarding was chaos... (Of course, same 2 careless ladies were in charge)."

Pros: "Went exactly as described"

Pros: "Plane interior was bright and new."
Cons: "Baggage retrieval. Chairs don't recline."

Pros: "The staff was a well oiled machine! Very funny & accommodating. They were all very friendly & helpful to all of the passengers. Everything was clean & orderly."

Pros: "Early, friendly staff"
Cons: "No WiFi"

Pros: "The crew was nice."
Cons: "Uncomfortable seats. Not enough space. Makes nervous flyers even more anxious. No entertainment. No TVs. No charging or WiFi."

Pros: "Forced to order a $50 Uber because the flight was delayed over 3hrs. I would like a refund since I always take public transit and allowed for some delays to still be able to take the A-line train. With no explanations our flight was delayed over 3hrs which made us land after the last train and when I talked with frontier agents they said that public transport schedules were not their problem, however their delay prevented me from using RTD and accruing a large charge for a ride home."
Cons: "I was not happy with the large delay along with the horrible customer service. For being a low end airline you should understand that your customers can not afford rides from the airport and rely heavily on the train from dia."

Pros: "Nothing"
Cons: "Everything"

Cons: "Everything, poos policies that do not satisfy the customer."

Cons: "Plane was too hot"

Pros: "Personnel were great"
Cons: "Luggage took over an hour"

Cons: "50 minutes late with no warning"

Cons: "40 minutes and still no bags"

Cons: "The same 2 screaming babies entire flights. Attendants allowed with no assistance."

Cons: "There were several delays."

Cons: "5 hr delay with no explanation."

Cons: "Frontier is an awful scam of an airline."

Cons: "8 dollars for a can of soda? really?"

Pros: "Loved the pilots humor!!"

Pros: "Wish they had free snacks."

Pros: "Sort of cheap"
Cons: "Cheap at every level. Makes you feel unsafe. Are they cutting on cheap pilots too?"

Pros: "Nothing."
Cons: "Customers service"

Cons: "I did not know you all do not provide complimentary beverages and snacks. I did not know I had to purchase a seat to sit in for check in and only one carry-on was allowed."

Pros: "Getting off the plane."
Cons: "Everything else."

Pros: "Nothing"

Pros: "someone stole an item from my suitcase"

Pros: "There is noting positive for me to say"

Pros: "Plane was delayed till the next morning... It was terrible"

Pros: "Excelente"

Cons: "Lost my luggage and people at check in were rude"

Read more about Alaska Airlines
COVID-19 information

Safety measures for airlines flying from Washington to Colorado

Airlines flying from Washington to Colorado have enacted additional safety measures and adjusted policies to better accommodate travelers. Policies vary by airline.

Heightened sanitation

Daily cleaning, installation of cabin HEPA filters on flights from Washington to Colorado

Mandatory masks

Masks required on board, masks provided on flights from Washington to Colorado

Social distancing seating

Middle seats unavailable to book on flights from Washington to Colorado

Pre-flight testing

Testing for antibodies, testing for symptoms for flights from Washington to Colorado

Book cheap flights from Washington to Colorado

Recent round-trip flight deals

8/19
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Frontier
2h 21m
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Frontier
2h 25m
DEN - GEG
8/31
Tue
1 stop
Multiple Airlines
13h 54m
SEA - DEN
9/7
Tue
nonstop
Multiple Airlines
3h 03m
DEN - SEA
8/17
Tue
1 stop
Spirit Airlines
17h 11m
SEA - DEN
8/19
Thu
1 stop
Spirit Airlines
21h 36m
DEN - SEA
8/27
Fri
nonstop
Multiple Airlines
2h 50m
SEA - DEN
8/31
Tue
1 stop
Multiple Airlines
8h 26m
DEN - SEA
9/2
Thu
nonstop
Frontier
2h 43m
SEA - DEN
9/6
Mon
nonstop
Frontier
2h 54m
DEN - SEA
9/29
Wed
nonstop
Multiple Airlines
2h 41m
SEA - DEN
10/6
Wed
1 stop
Multiple Airlines
8h 45m
DEN - SEA
9/16
Thu
nonstop
Multiple Airlines
2h 41m
SEA - DEN
9/21
Tue
1 stop
Multiple Airlines
6h 15m
DEN - SEA
9/24
Fri
nonstop
Multiple Airlines
2h 38m
SEA - DEN
9/28
Tue
1 stop
Multiple Airlines
6h 15m
DEN - SEA
9/20
Mon
2 stops
Spirit Airlines
17h 42m
SEA - DEN
9/28
Tue
1 stop
Spirit Airlines
6h 15m
DEN - SEA
8/31
Tue
1 stop
Spirit Airlines
13h 54m
SEA - DEN
9/3
Fri
1 stop
Spirit Airlines
18h 51m
DEN - SEA
9/4
Sat
nonstop
United Airlines
2h 41m
PAE - DEN
9/7
Tue
nonstop
United Airlines
2h 58m
DEN - PAE
10/23
Sat
nonstop
Alaska Airlines
2h 39m
SEA - DEN
10/24
Sun
nonstop
Alaska Airlines
3h 10m
DEN - SEA
8/31
Tue
nonstop
United Airlines
2h 15m
GEG - DEN
9/7
Tue
nonstop
United Airlines
2h 27m
DEN - GEG
8/26
Thu
1 stop
American Airlines
14h 13m
GEG - DEN
8/29
Sun
1 stop
American Airlines
16h 49m
DEN - GEG
9/11
Sat
1 stop
Delta
6h 24m
GEG - COS
9/14
Tue
1 stop
Delta
4h 28m
COS - GEG
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Recent one-way flight deals

8/22
Sun
nonstop
Frontier
2h 21m
GEG - DEN
8/31
Tue
1 stop
Spirit Airlines
13h 54m
SEA - DEN
8/20
Fri
1 stop
Spirit Airlines
7h 23m
SEA - DEN
8/15
Sun
nonstop
Frontier
2h 21m
GEG - DEN
8/20
Fri
nonstop
Frontier
2h 50m
SEA - DEN
8/18
Wed
nonstop
Frontier
2h 50m
SEA - DEN
8/19
Thu
nonstop
Frontier
2h 43m
SEA - DEN
8/12
Thu
nonstop
Frontier
2h 21m
GEG - DEN
8/31
Tue
1 stop
Spirit Airlines
13h 54m
SEA - DEN
8/17
Tue
1 stop
Spirit Airlines
13h 54m
SEA - DEN
8/22
Sun
1 stop
Spirit Airlines
27h 18m
SEA - DEN
8/27
Fri
nonstop
Alaska Airlines
2h 40m
SEA - DEN
8/26
Thu
nonstop
United Airlines
2h 15m
GEG - DEN
9/4
Sat
nonstop
United Airlines
2h 41m
PAE - DEN
9/7
Tue
nonstop
Alaska Airlines
2h 40m
SEA - DEN
8/24
Tue
1 stop
Multiple Airlines
26h 26m
SEA - COS
10/5
Tue
1 stop
Multiple Airlines
17h 28m
GEG - DEN
8/25
Wed
1 stop
Multiple Airlines
26h 52m
SEA - COS
9/9
Thu
nonstop
Delta
2h 35m
SEA - DEN
8/26
Thu
1 stop
American Airlines
7h 45m
GEG - DEN
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