Find Cheap Flights from Colorado to San Francisco

Cons: Baggage fees... oh and every flight was late and if they couldn't fill a plane, they would push people back to the next one to combine the loads and have the nerve to say it's a delay caused by TSA. My return flight home was delayed almost 3 hours, I missed my layover and there were no other flights out to my destination til the next day. I was a full day late and missed a very important interview thanks to Frontiers poor ethics.

Pros: This was the last time that frontier receives any of my money.

Cons: All flights are late, always. Seat and luggage fees are much too expensive. Never again Frontier.

Pros: Friendliness of the SF counter agent.

Cons: Hidden charges! The quoted price did NOT include additional exhorbitant baggage charges, charges for in flight food and drinks, fixed seat backs. This was a classic case of bait and switch

Cons: Everything. The flights are constantly being delayed. Poor selection of snacks and beverages. If people are going to pay $3 for a can of orange juice. It should be a lot better than concentrate minute maid. There are no business class seats. None of the seats recline on the whole plane. Im still waiting for a voucher from a previously canceled flight.

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: United king of being delayed..

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: The employees were very helpful on both legs of the journey and the conneting flights were conveniently located in the same area. Pilot was good about letting us know time frame of mechanical issue repair while on tarmack.

Cons: The seats were incredibly uncomfortable. Must be the type of plane because never really had issues on other flights. We noticed many carry on bags others brought on bosrd were oversized. On leg from Kalispell to Denver the crew were diligent in spotting larger bags and tagging them for under plane storage for the flight. From Den to SFO however not so much. This led to most bins being filled ahead of our group 4 boarding with larger than permitted carry on bags. Obviously larger! Luckily we were able to put our smaller bags (which we made sure fit to overhead storage specs ahead of time) under the seat for flight but that made an uncomfortable 2.5 hour journey. Actually over 3 hrs because there was a mechanical problem which had us sitting on the tarmack for over 30 minutes from Den to SFO. We've flown United before without much incident but this trip in particular was pretty crappy.

Pros: Afert we have to comeback to the GATE in Atlanta,the next Aiplane was good and the flight was great.

Cons: Well,the trouble was not the Crew or the Air Steward,but it was something wrong with the start the engine.

Cons: It was late

Cons: More leg room and seat width. I don’t like having other passengers pressed against me.

Pros: Inflight entertainment was the best I’ve seen in coach. Free games, movies, moving map, etc.

Cons: The seating is too cramped. It has just gone past what is reasonable. Seems too tight on both the knees and elbow room.

Cons: screaming children tended to instead of placated.

Pros: Price

Cons: Seating is tight

Cons: if flight was delayed should at least provide complementary soft drinks...

Pros: I arrived at my intended destination.

Cons: They charged me for a CARRY ON which no other airline does or has ever done and they don't tell you until you're at the gate. It cost money to check a bag, so I didn't but it costs double to bring s carry on which seems like a manipulative, strategic move on their part. Awful frontier. Just awful.

Pros: Flight was shorter than expected

Pros: Personal entertainment system

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

Pros: On time from Checking In and Departure

Pros: That eventually I made it to SFO. Also too that the jerk sitting in front of me was corrected by a fellow traveler. All through the flight the guy kept egging for a fight with someone but thankfully disappointed.

Cons: When my ticket was originally resevered I printed out the flight info than. I was to go out Alaska and come back on Frontier. On the day of my flight I checked my email and was confused because it showed Frontier instead and if I checked in online I had to pay 15.00 more dollars to pick a seat. This is at 4:00a.m. in the morning and my visa is downstairs. I'm not paying another 15 for a seat I should already have. When I get to airport, I'm told not Alaska but Virgin. I run to Virgin only to find it's Frontier and instead of 7:15 the flight leaves at 7:00 and I had to wait in line to get this info because kiosk wouldn't let me log on. Needless to say I had to book the next flight that came 8 hours later. Why so few flights to SFO and if all three of you are connected why couldn't the rep. book me on one of the other two? I was responsible to get there 2 hours ahead but I could have made it if the paperwork had not been so confusing.

Pros: I arrived at my intended destination.

Cons: They charged me for a CARRY ON which no other airline does or has ever done and they don't tell you until you're at the gate. It cost money to check a bag, so I didn't but it costs double to bring s carry on which seems like a manipulative, strategic move on their part. Awful frontier. Just awful.

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

Pros: Good

Cons: Good

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

Pros: nothibg

Cons: ecerythung

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.

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: Friendliness of the SF counter agent.

Cons: Hidden charges! The quoted price did NOT include additional exhorbitant baggage charges, charges for in flight food and drinks, fixed seat backs. This was a classic case of bait and switch

Cons: I did not like the lack of space.

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

Pros: Nothing

Cons: Frontier is the worst airline. No sense of flight time, service is horrible, seats are terrible, flight stinks. And prices are not cheap at all. They fly whenever they like.

Pros: Nice Hosts?

Cons: Cant watch TV for free- stuck watching gold rush whatever that is. Seats were uncomfortable knees felt cramped up smelled funny could not sleep, because the seats were not comfortable we sat at the gate for too long we took off late why didnt we de-ice beforehand? I dont understand why they say "we need to check your bags" when there is plenty of overhead space. It's stupid

Pros: nothibg

Cons: ecerythung

Cons: Seats in economy were cramped! Chair barely leaned back at all. Woke up with a sore neck. Cabin was freezing!

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

Cons: Horrible flight canceled 12 hours before

Pros: Not to much

Cons: Was like riding a city bus. Even in row one didn't have much room to stretch out. Check in took awhile. Only thing they had going for them was good pilots and staff. But the planes are trash no entertainment, little selection of food and drinks. Don't suggest at all.

Pros: I arrived at my intended destination.

Cons: They charged me for a CARRY ON which no other airline does or has ever done and they don't tell you until you're at the gate. It cost money to check a bag, so I didn't but it costs double to bring s carry on which seems like a manipulative, strategic move on their part. Awful frontier. Just awful.

Pros: Nice flight with competent crew.

Cons: Kiosks did not work for check-in so I had to queue up and wait for help. Then I got charged $45 for a carry-on. Not a great start to the day.

Pros: Not to much

Cons: Was like riding a city bus. Even in row one didn't have much room to stretch out. Check in took awhile. Only thing they had going for them was good pilots and staff. But the planes are trash no entertainment, little selection of food and drinks. Don't suggest at all.

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: Fairly inexpensiveI

Cons: I did not like the fact that I was charged $45 for a carry on piece of luggage both ways. It added $90 to the cost of my trip.

Cons: The man next to me farted at least 30 times. He was overweight and I'm sure it is uncomfortable for him to get up and go to the restroom. This is unacceptable, though, and there should be a no-farting policy.

Cons: Stewardess very rude

Pros: I paid for 2 seats and they took my seat and did not reimburse me

Cons: They should of reimbursed me for my seat that they took

Cons: If we had access to the WiFi to watch shows earlier like United does, that would be nice.

Pros: nothing. Plane never left.

Cons: Airlines that actually fly. We ended up renting a car and driving the 3.5 hours from Charlotte to Savannah and actually beat the flight that finally left after 11 pm and landed 1 am. We should have gotten the car much sooner and driven instead of sitting at the airport for 8 hours.

Pros: Personal entertainment system

Pros: The flight attendant was really nice

Cons: Way too much money for the quality of first glass - I should have never upgraded, ancient.

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: The stewardess was very hard to understand in English.

Pros: I didn’t like anything about it.

Cons: I almost missed my flight because you oversold . Your agent at the gate wasn’t friendly at all. I had to call the customer service so I get my seat.

Pros: I arrived at my intended destination.

Cons: They charged me for a CARRY ON which no other airline does or has ever done and they don't tell you until you're at the gate. It cost money to check a bag, so I didn't but it costs double to bring s carry on which seems like a manipulative, strategic move on their part. Awful frontier. Just awful.

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: Price of the ticket sfo- denver

Cons: - no email from frontier reminding about check-in. - surprise charge of carry on luggage - deprature delayed by 2 HS and no acknowledgement of that by the crew

Cons: We missed this flight because our earlier flight was delayed and all frontier would do is tell us that we could “google” flights on other airlines to get us where we needed to go. No hotel voucher for the forced overnight, no refund for the missed leg, nothing. I really don’t understand how this company is in business.

Pros: Crew was pleasant

Cons: They charge for: a checked bag, a CARRY-ON bag, and your seat choice. There is no on-flight entertainment. The seats don't recline. The check-in counter has massive lines of people and is clearly understaffed. The gate is frequently empty and abandoned with zero people to answer your questions. Flights are late without good reason. Gate agents are understaffed, uninformed, and frazzled. Gate changes were poorly communicated and disorganized. Frontier management and leadership: you should be embarrassed.

Pros: Nothing

Cons: Everything

Cons: I did not like the lack of space.

Pros: Never made the connecting flight.

Pros: Just fine, beverage service was friendly.

Cons: The entertainment system was out the entire flight. The flight attendants were just talking to each other as we left, even when I tried to say thank you.

Pros: Very helpful flight crew.

Cons: A little unexpectedly bumpy.

Pros: Comfortable Seating!

Cons: Flight delayed Quite a bit.

Pros: Crew was very nice.

Cons: A choice between pretzels and other snacks.

Pros: There was only one flight attendant but he was very friendly and worked very hard

Cons: The checkin process is awful if you fly basic economy. This is the second time I have flown basic economy on United and you have to wait in line for 20 minutes to get a boarding pass and then have someone inspect the size of your personal item. You cannot check in and get a boarding pass online.

Pros: Love the ability to watch films on my device by way of United WiFi

Cons: Better snacks

Pros: I sat next to two of the flight attendants prior to our departure. When they got up to board, their negative comments about getting on the plane made me think Wow, why are you doing this job, if you don't really want to go. The two attendants at the check in, they need some training.

Cons: More professional staff.

Pros: Loved the pilot telling us a little about the flight crew and their piloting experience(Air Force) , and how he kept us abreast of flight status/timing , as well as our location at various points along the route. The crew was very very nice!

Cons: More leg room

Pros: Diverted for unclear reasons. Stuck in TSY with hotel voucher to an overbooked hotel; trying to find out of pocket accommodations after long day of no food at MIDNIGHT was a real downer! I’ll let ya know if I make it home TODAY!!!

Pros: Everything met my expectations

Cons: Refreshments

Pros: Free movies

Cons: Bad food, cramped seating, slow food service

Pros: I arrived safely

Cons: When I bought the tickets, I didn't realize a carry on luggage is and extra $45. That's $90 added to the ticket price. Buyer beware

Pros: The crew were great and considerate knowing a large portion of the passengers had just had a horrible flight from Atlanta.

Cons: Can't fault anything but the lack of healthy and/or meal options on the menu

Pros: Nothing

Cons: Crew members could have been more friendly, boarding could have been quicker, no compensation for extreme delay

Pros: Food was so good. Crew was also very nice.

Cons: Seem that they turned off the air conditioning once we landed in the cabin got on the warm side.

Pros: Nothing

Cons: I came from a long trip from France, the seat I was assigned was not reclinable, close to the restroom. I was totally exhausted from the previous flight, not able to sleep at all and when I tried to stretch my legs by sitting sidewards on the aisle a crew member keep bothering me to keep my legs out

Pros: Crew was the best I have had in 2019 on Delta, the only good crew.

Cons: Everything at the Atlanta Airport. From the airport and staff itself to those working for Delta Airlines. It has been so bad, that I am thinking of flying with American Airlines again and avoiding the Atlanta Airport all together. Absolutely the worst airport in the country, Delta not much better