Find cheap flights from Denver to San Francisco

Cons: "Plane wasn’t clean (trash at my seat)"

Cons: "Dumped out in cargo to take a bus? Late late late"

Pros: "yes"
Cons: "Lost baggage in Kathmundu"

Pros: "Everything"
Cons: "Nothing"

Pros: "very attentive crews."

Cons: "Pilots were 50 mins late"

Pros: "good food and good movie selection."

Pros: "Seating choice"
Cons: "Boarding wasn't as bad as Delta... god they suck"

Pros: "Boarding and special request was excellent. We requested wheel chair for my mother and it was waiting at each arrival."

Cons: "Timeliness"

Cons: "The staff was exceptionally kind and understanding"

Cons: "When we landed we sat on the tarmac for over 30 minutes when they said 10 minutes."

Cons: "None"

Cons: "Nothing, all was perfect!"

Cons: "Everything."

Pros: "Everything"
Cons: "My cabin bag has been misplaced and I siding receive the same."

Cons: "delays on both departure and arrival mobile boarding pass system did not work."

Pros: "Everything went smooth and was great besides the boarding."
Cons: "Boarding seemed to take quite quite awhile, not sure what the deal was but once we were boarded they kicked it into high gear"

Pros: "I did not like anything. The worst experience. I checked in through your site and got 11F seat which was changed when I took boarding card at airport to 32F. Later I came to know that they sold my seat even after my check in. So pathetic behavior. Never recommend this airline. They should learn from some of the Asian airlines."

Pros: "Great airline delayed 2 hours because of a new paint job on the plane. Sat on the runway in sfo"

Cons: "Delayed"

Pros: "It was all good."

Cons: "My luggages was not come at the destination. We don’t have clothes to changes for 2 days."

Cons: "No soft drinks. Really."

Cons: "the person nwxt to me was hesitant to stand ip when I wanted to go bathroom. Ither than that I lived it. Attendants were super nice which makes experience different."

Cons: "No comfort given to passengers despite 2.5 hr delay in leaving and another 1 hr on the ground after landing"

Pros: "Partnership with Virgin. Drink orders."
Cons: "boarding process didn’t go by the script and was a mess"

Pros: "Everything was easy and normal. I felt everyone was treated well."

Cons: "At boarding, when overhead bins are full, you cannot force passengers to check their bags if they had planned not to. I was in a rush when I land and because it was delayed too I did not want to also have to wait for my bag at baggage claim. I was completely late to an event I was to be at."

Pros: "Comfortable seats with free TV, movies, on time departure"
Cons: "Nothing"

Pros: "Movies"
Cons: "Bathroom was disgusting, there wasn’t a trash so people threw their hand towels on the floor."

Cons: "Snotty steward in the back. Not pleasant."

Cons: "Reading lights did not work. Fortunately I could move"

Pros: "Everyone is so helpful and cheery"

Pros: "The boarding process. The take off and the landing were great."
Cons: "Not enough room between passengers. Especially when you do not know the person next to you. More elbow room would be great. This is for the general seating. The isles are narrow too."

Pros: "Pleasant staff"

Pros: "Poutin"
Cons: "Higher bagge fees and missed the bus"

Cons: "Everything!!!"

Pros: "Team very nice and polite."
Cons: "All the airplanes should have screens"

Pros: "The extra seat next to me."
Cons: "The fact that my baggage got left in Portland."

Pros: "normal."
Cons: "."

Pros: "Polite staff, efficient, all around great."

Pros: "Free wine"

Pros: "No delay, nice n comfortable"

Cons: "The lady on the kiosk this morning was annoyingly rude."

Cons: "Had a very muggy gross smell in there."

Pros: "More travel miles with AA CC MEMBERSHIP"

Cons: "Delays layover very poor"

Pros: "Nothing got seat by the toilet"
Cons: "Everything stressed"

Pros: "I would like to have ore of a grace period to check baggage."

Cons: "Bad social distance"

Cons: "100% as always.. delta has never disappointed! Keep up the good work guys"

Pros: "Felt safe and sanitary"

Cons: "Everything was really nice. The snacks were good. I don’t know if there are excellent t snacks but very good."

Cons: "Terrible delays"

Pros: "Good"

Cons: "Better food offerings"

Pros: "No food, late by hour"

Cons: "Sat on tarmac for 20 mins because we were early..."

Pros: "Service by crew. I was flying economy but it was par to business class."

Pros: "Very comfortable, no complaints."

Pros: "The guy announcing the boarding was a hoot! Great sense of humor."

Cons: "No delays. And have the terminal bridge in working order"

Pros: "Nothing spectacular."
Cons: "The headrests won’t stay up. And it’s hot."

Pros: "Yes"
Cons: "Took off late. Other than that very comfortable and great experience"

Cons: "Have rhe right to carry at least one luggage per person at no cost. Besides carry on and personal item. Tickets prices and luggage costs are extremely expensive."

Pros: "Staff from Check in to aircraft very pleasant. Snack choice in Coach impressive."

Pros: "If offering free WiFi to Amex platinum card holders it needs to work f"
Cons: "Fix it"

Pros: "Having three seats."
Cons: "I had three seats to myself! After getting elbowed all the way from Amsterdam to Minneapolis, I was tired and I slept three good hours."

Pros: "That it got me home"

Pros: "Check in Denver super helpful Gate staff hustled to turn around flight Flight crew excellent"
Cons: "Flight delayed, almost missed international connections"

Pros: "Boarding, friendliness of staff"

Pros: "Everything was easy and smooth."

Cons: "I will avoid middle seat from now on"

Pros: "On time"
Cons: "Take a long time to taxi to the gate & getting off the plane."

Pros: "Nothing"
Cons: "Multilpe delays"

Cons: "late leaving, arriving and taxing."

Cons: "Engine problems-2 hour delay"

Pros: "Everyone was fairly friendly"
Cons: "Cramped foot room"

Pros: "Great selection of movies"

Pros: "Food was plenty."
Cons: "Long security lines at Logan. No free WiFi"

Cons: "Bags never arrived at the listed baggage claim. After 45 min, I saw bags on a different claim station and I notified everyone standing around. BUT, I filed a claim with Delta and was immediately given 2500 miles, as guaranteed!"

Pros: "Delta is great"

Cons: "See above"

Cons: "Got in early"

Cons: "Force me to take a bad seat"

Pros: "The temp"
Cons: "It was too hot."

Pros: "What a city.. Unique for hell sure..."
Cons: "Nothing"

Pros: "Boarding super excellent! Also: Best landing I've ever experienced! Props to the pilot!!"

Pros: "Newer plane with movies."
Cons: "Airlines pack you on so tight."

Pros: "Maintained high standards of service despite massive delay."
Cons: "Boarding and departure was messy because of the delay"

Pros: "We'd paid extra for main cabin so hot to choose seats and got in flight entertainment.. Staff were friendly."
Cons: "No free wifi."

Pros: "The boarding was efficient"
Cons: "Three hour departure delay. No explanation given. No apology."

Pros: "I love Delta. Smooth boarding. Quality service. Keep it up!"

Pros: "The moviea"
Cons: "The time of night"

Pros: "COURTESY"

Pros: "I didn't like anything because the fly leat 3 hours"

Pros: "Smooth ride. Delta got everything right from takeoff to landing."

Pros: "Excellent customer service. That doesn't seem to happen too often with airlines. Delta has been outstanding."
Cons: "No complaints."

Pros: "Yes made sure mask was in place"
Cons: "No"

Cons: "Traveling in a 737-800, there is no displays at your seat. One must BYOD. Wifi was spotty."

Cons: "Overbooked and crowded, on a Sunday."

Cons: "Everything was dandy!"

Pros: "Nothing."
Cons: "Everything"

Cons: "You were out of earphones"

Pros: "On time. Fast boarding. Comfortable seating."

Pros: "We were allowed to board early with my father, who is disabled."
Cons: "Denver airport was a nightmare with my disabled father. We were given a “wheelchair” but no escort through a nightmarish security scene. Airport is terribly designed, lacking clear signage and navigation. TSA was a disaster and no one seemed remotely concerned about my father’s comfort or needs."

Cons: "50 minute wait for a gate to deplane. How could there not be a gate at 10:30 pm? It’s not like our arrival was a surprise!?"

Cons: "On Time. Delayed advice 3 times."

Pros: "Comfortable"
Cons: "I was in 10C a So I was able to hear a disgruntled AA employee. Just like office politics. But up in the air. I didn’t need to hear"

Cons: "Delays sucked."

Cons: "Less boarding groups"

Pros: "Highly skilled pilot."

Pros: "Everyone was nice and it went smoothly!"

Cons: "I have changed flights. Been delayed 5 times now. And still haven’t left the USA."

Pros: "No"

Cons: "Never made it"

Cons: "See above"

Pros: "The staff was very nice and passed around several times offering drinks and food"
Cons: "The food selections is literally three things. I ordered the cheese tray and the grapes were rotten. I mean, it is already pricey and on top of that bad quality"

Pros: "Nothing."

Pros: "Not using kayak"
Cons: "Kayak booked me the worst itinerary in the history of air travel!"

Cons: "The flight was delayed. The food was not great. There is not a lot of space in these planes, and it was a long flight. There is no power supply."

Cons: "Lateness, seat comfort and gate checking a duffel bag"

Cons: "the connection time between flights was NOT adequate especially considering I had to go through customs! AA did page me and had a representative (I think his name was Brian) waiting for me to help me get to my connection. He gave me a bright red/orange tag. I still hit some barriers. I was stopped in security and my carry on was put aside to be searched. It sat and sat . I explained to the man I had to go. He said he was working alone, so I had to wait. I was ready to leave it and just run to catch the flight, but the security man said I wasn't allowed to do that. He finally called someone else to search my bag (nothing found) I did make it...barely!"

Pros: "The helpful steward"
Cons: "The bumpy ride"

Pros: "Quick and did good job"
Cons: "After flying Japan Airlines I wish there were more free food and entertainment"

Pros: "Loved the entertainment features. Great movie selection!"
Cons: "Nothing"

Pros: "Flight was on time."

Pros: "Everything was on time and handled efficiently and courteously. I was pleased with everything."

Cons: "Too cold, even with air off above me."

Cons: "experienced a 1hr mechanical delay. it would be nice if refreshments were served."

Pros: "Good connection"

Cons: "For a flight five hours or more I was disappointed that there was no complimentary food. It otherwise it was fine"

Cons: "Maintenance problems, late departures, uncomfortable airlines"

Pros: "See above"
Cons: "See above"

Pros: "Everything"
Cons: "Nothing"

Cons: "No Gogo entertainment"

Pros: "Good free entertainment. Thanks."
Cons: "No good free snacks. Only free drinks."

Pros: "Nothing"
Cons: "Everything"

Pros: "Entertainment"

Cons: "That fact that on both ways they changed our flights which either we got to the destination late or we had to run across the airport so we don't miss our flights"

Cons: "People still using mobiles as we were taking off. Crew seemed not too bothered."

Pros: "Tebsnacks were awesome!!"

Cons: "Sits were not comfortable."

Pros: "Wi fi did not work."

Pros: "No surveys"
Cons: "No surveys"

Pros: "The Denver airport is beautiful"
Cons: "I will never fly AA again - see below"

Pros: "Friendly service"
Cons: "Snacks"

Pros: "how easy it was to purchase ticket on kayak."
Cons: "Being charged for my checked bag unexpectedly at check in."

Pros: "We like the boarding according to row n., which limits the contact with other people."
Cons: "The plane was full, which means no physical distancing was possible."

Cons: "Clear checkin needs to have better coordination with TSA agents."

Cons: "the seats are very uncomfortable."

Pros: "Nothing. United has a long way to go."
Cons: "Food is terrible. Honey nut cheerios is the only cereal choice, great for diabetics."

Cons: "We should have had less in our carry on so we had more leg room. The staff was friendly and very helpful. There was plenty of movies, tv options, and games to pass the time when we weren't sleeping on the over night flight."

Pros: "Read above"

Cons: "United have somehow managed to make their newer planes (777) even less comfortable then their old ones, I thought that was impossible but they found a way."

Pros: "The crew and the fact that they at least acted like they cared."
Cons: "After UA posted a four hour delay for my original flight, I switched to the next available 1.5 hours later. That flight got delayed and then delayed some more, and by the time I got to SFO, the flight I originally booked, landed about 20 minutes later."

Pros: "Food was great"

Cons: "I didn't go on my trip. My course in SF was cancelled and United would n't refund my money or change the dates for my trips because of there basic economy package. They have 3 different economy packages and the economy basic doesn't get refunds and you can't change the flights if needed. It feels like they are banking on increasing there ROI with this basic economy ticket which is 40 -60 dollars cheaper than the next economy package. Intuitively they know people will pick that, but if something comes up the customer is screwed."

Cons: "Hold time on tarmac. Over an hour. In a hurry to board people. If they knew they had a delay due to weather they might have done some better planning"

Cons: "Boarding group is getting huge!!!"

Pros: "Good flight with no issues."
Cons: "No complaints"

Pros: "Cool crew"
Cons: "Delayed flight"

Pros: "Got an aisle seat"
Cons: "Plane was late. No Wi-Fi."

Cons: "Seat space was very tight"

Pros: "I enjoyed my interaction with the other passengers."
Cons: "Several delays compounded to make trip a lot longer and far less comfortable than it needed to be."

Pros: "Nice seats, very helpful staff at ticketing and nice crew"
Cons: "Reservation was deleted so check in took a very long time and my seat (reserved weeks in advance) on the long international flight was reassigned to a very undesirable location."

Cons: "I was charged twice for my ticket"

Pros: "Friendly crew"
Cons: "Sardine can with no amenities. What value."

Pros: "I like that this flight got me from point A to point B. It was uneventful."
Cons: "I am tall and there is never enough leg room"

Pros: "There was a mechanical delay that caused us to leave 1.5hr late. The gate team did a good job keeping us informed of what was going on."
Cons: "Delay kept changing as they tried to fix the problems. Also, wifi did not work so I couldn't use free United entertainment via the app."

Pros: "Crew did a great job. Air China had much better food service."
Cons: "Seats two small, not enough room to stretch your legs. Bathroom to small. Designed for people less than 150lbs, and 5'-6" in height Not comfortable for people over 6' tall."

Pros: "Boarding was easy and organized."
Cons: "Older plain with less leg room. Had to pay to watch a movie. Little bag a snack are little!"

Pros: "The FC Cabin is very comfortable; The service was also excellent"
Cons: "The food was mediocre"

Pros: "It was a brand new aircraft in it was a big one."

Pros: "The stuff were accommodating and fun"

Cons: "flight was 90 mins late."

Pros: "On this flight at least customer service agent gave us seat together. It was very nice of her. Also flight crew were much better. At least I didn't feel like that they hate the customers."

Cons: "No food no entertainment. It's a sad change from how United used to be"

Pros: "Price was good. If it'd been an expensive ticket I'd have been upset"
Cons: "Pay for carry on luggage, last board plane despite having a window so everyone had to get up to let me in, no check in 24 hours in advance unless paying for baggage, in flight entertainment didn't work, seat charging outlet didn't work."

Pros: "Seats were comfy and I liked that the screens on the back of seats had a map of where we were in the flight."
Cons: "Wifi was kind of expensive- I bought 30 minutes for like $3- but it didn't even work. Maybe got 5-10 minutes of actual internet out of it, the rest was frustrating loading pages. Not worth the purchase."

Pros: "Nothing"
Cons: "Couldn't even get me a slightly better seat given all the hassles I'd been put thru up to that point."

Pros: "Flight was shorter than expected"

Cons: "United king of being delayed.."

Pros: "Na"
Cons: "Flight delayed 11 hrs, they could not offer me an alternative to get me to my event in time so after five hours at the airport I had to return home. Their offer was "maybe" a refund and a $10 food credit. Out $500+ lost in hotel fees at my destination- which most importantly, was my ten year grad school reunion!"

Pros: "The flight attendant was really nice"
Cons: "Way too much money for the quality of first glass - I should have never upgraded, ancient."

Pros: "On time from Checking In and Departure"

Cons: "No on board entertainment unless you had your own device, which I didn't."

Cons: "EVERYTHING. My flight was originally scheduled for 650p. I understand that weather can cause delays. That's OK. However, the flight departure kept getting shifted. We ended up boarding for a 9:58p departure. I was told there was no more overhead space for my bag and forced to check it. When I got on the plane at 930p, there was clearly enough overhead room for my bag. I'm not sure why I was forced to check it. We then sat from 930p to 958p. We pulled away from the gate and then were told that we had to wait another 20 min. We turned off the engine and then waited until sometime between 1130-45 ON THE AIRPLANE on the runway. Is this even legal?? We finally took off and landed at 115a PST. I waited for 35 min for my bag that they forced me to check. They loaded our bags onto the wrong carousel, which caused all of us to be waiting for our bags in the wrong place for 10 minutes. This was the worst experience I've ever had flying. It wasn't the delay but the lack of clarity, being forced to sit on that plane for hours, and having my bag taken. I got to the airport in Denver at 550p PST and got home to SF at 3a PST for a 2 hour flight."

Cons: "Food was mediocre. Some staff was friendly, some was NOT"

Pros: "nothibg"
Cons: "ecerythung"

Cons: "Power outlets worn out and won't hold a plug so they are unusable"

Cons: "The stewardess was very hard to understand in English."

Pros: "On time"

Pros: "Got to sfo early which I always appreciate"
Cons: "Boarding took about an hour because people didn't seat in their assigned seats and the flight attendants didn't notice until a family who had purchased seats together found their seats occupied. About 8-12 people had to switch seats, absolutely ridiculous"

Pros: "Left in time"
Cons: "The plane was so unbelievably hot. The air hardly blew out of the vents. Also, they left the lights on the entire time on a flight that left at 10pm and arrived at 12:30pm (11:30pm local time). It made for a very uncomfortable ride"

Pros: "There was nothing to like"
Cons: "Departed 45 mins late. Flight attendants too old, opinionated and grouchy for the job. Ground crew not any better."

Pros: "Free wifi, one free snack and drink, overall one personal item and one free carry on bag."
Cons: "Wifi wasn't excellent and the crew should tell the passengers that they give out one free snack and drink."

Cons: "Worst landing ever ."

Pros: "I thought everything and everyone were great!"

Pros: "Loved the full experience with the airline including the boarding experience."
Cons: "The food options could have been improved!"

Pros: "Everyone was helpful and friendly."
Cons: "Not charge so much for luggage and carry-ons."

Pros: "Nothing"
Cons: "Crew members could have been more friendly, boarding could have been quicker, no compensation for extreme delay"

Pros: "Good"
Cons: "Good"

Cons: "It's $40 to bring a carry on... really?"

Cons: "The flight was delayed an hour and the website would never work on my phone to check in and pay for our baggage."

Cons: "I did not like the lack of space."

Pros: "I arrived safely"

Pros: "Nothing"
Cons: "Everything"

Cons: "They didn't know how to handle the unpleasant situation of having delay due to "the plane is having some problems and they will try to fix it asap before departure"."

Pros: "Gate crew at Denver on May 2nd (afternoon) were just disorganized and confused. She was just stressed out for no reason. Seems like not a people's person and can't stay calm at ALL. Can't handle stress at all"

Pros: "Nothing."
Cons: "After building in additional fees paid for seats didn't really cost less than competing airlines. No reclining seats. First airline where you had to pay for everything including soda."

Pros: "Wonderful service"

Cons: "Seriously, extra charge for a seat and carryon? Crappy plane, etc."

Pros: "Nothing"
Cons: "My layover went from 7hrs to 11yrs. Changed gates 3x. Communication was poor."

Pros: "Personnel were very polite and tried to be helpful."
Cons: "Our luggage was not loaded onto the plane. The lost luggage support at SFO was friendly but extremely inefficient."

Pros: "Great people"
Cons: "But no leg room"

Cons: "They lost my luggage, never filed my claim until two days and 3 people later, and I didn't receive my bag back until 4 days after and the delivery guy was mad at me because even though I told 3 different people my address and wrote it down before leaving the airport, they never told him."

Pros: "Friendly attitude"
Cons: "Should be an agent helping people in line at ticket counter. More ticket counter agents."

Cons: "Pay $2 for a juice? And $25 for a skateboard? Hidden charges suck."

Pros: "Nothing"
Cons: "Everything"

Pros: "Nothing."
Cons: "Everything."

Cons: "Delay"

Pros: "the low fares"
Cons: "the delays and carry on charges"

Cons: "Frontier doesn't lease enough gates. Waited 35 minutes after landing for gate to clear. Both flights. Frontier late in unloading bags. Waited 40 minutes at luggage carousel. Frontier lost my bag"

Pros: "nothing"
Cons: "trash airline"

Pros: "Inexpensive"
Cons: "Seat extremely uncomfortable for a person my height (6') and not adjustable in any way. Not a ton of leg room either, though not noticeably less legroom than other airlines."

Pros: "None"
Cons: "None"

Pros: "The minimal interaction I had with the Crew suggested that they were nice."
Cons: "It was continuously delayed a total of five times. It was not explained why things were delayed. The spaces were cramped and the trays were small. Leads me to be interested in traveling in other "cheaper" airlines such as Spirit."

Pros: "Delay for too long. It took so long after landing! What are the ground crews doing?"

Cons: "Frontier charges for the most basic amenities that other airlines provide (non alcoholic beverages and carry-on luggage space)."

Cons: "luggage was lost seating very cramped had to rush to board, almost missed connection"

Pros: "Excellente"
Cons: "Excellent"

Pros: "nothing"
Cons: "everything. what has happened to frontier? wont fly them again"

Pros: "The bare bones frontier philosophy leaves nothing to like"
Cons: "Feeling like cattle"

Cons: "Delayed, no notifications"

Cons: "Boarding - people who sit up front go first meaning that those that have seats in the back have to go in past people who are still in the aisles arranging themselves. I could not get a drink of water without paying. Is it really that esxpensive to give a coke and some peanuts??? Paying for seat selection means that some people get in the seats other peoiple want (like window seats) who don't want them. I tryly believe that Frontier is the nickel and diming airline. And I don't believe you had to wait for a gate and 11:30 at night."

Pros: "That they got me to my destination safely."
Cons: "This airline is a joke. Shame on me for booking late and choosing the cheapest ticket. BUT knowing what I now know, I would have selected the Delta flight for $80 more. Here's why: No TSA Pre-Check. This aspects alone is a deal breaker. Pay for carry-on bag AND IT COSTS $40. Pay for beverages, snacks. Seats don't recline - "pre-reclined for your maximum comfort." Whatever Tray table is metal and tiny. You couldn't even fit an iPad mini on it, let alone a lap top. So, I put my MacBook on my lap to work, but it's uncomfortable, MacBook slides off. You're hitting the person next to you with your elbows. AND I have to take off my jacket, to protect my MacBook against hitting the metal tray table, so I got cold. No internet. It's 2016. No internet. It's 2016. Never again."

Pros: "Cheapest airline ever"

Cons: "No snacks no televisions on flight , even seats are worst ."

Pros: "seating too hard- need more cushioning"

Cons: "Very uncomfortable cramped seats that do not recline. The price does not reflect that you have to pay for everything, checked bags, carryon bags, snacks, soda's. No entertainment even during a 4 hour flight."

Pros: "Nothing"
Cons: "Everything"

Cons: "This airline comes up with every idea possible to charge the costomer. I give the airline a star for being sneaky and sly and having rules and policies to rip off passengers. Because it is brilliant that they con you without breaking any laws."

Pros: "Nothing"
Cons: "Horrible service"

Cons: "Frontier nickles and dimes you."

Cons: "I will not fly Frontier again."

Pros: "Flying for cheap. Trays are too small"

Pros: "New seats were slim and yet comfortable and full in the seat. On time departure and arrival Price"
Cons: "No coffee? tea? really? Leg room minimal Tried to choose seat online but only responded if I selected one costing yet more. Only 1 carry on no matter size Not enough space to open lap top fully with small table."