Find Cheap Flights from Colorado to San Francisco

Cons: The crew was rude to the passengers. They charge form 9$ to 40$ for seat selection. Charge for a Carry on bag (anything that doesn't fit under your seat). The flights had maintenance issue, hence delayed. I will absolutely avoid traveling with frontier in the future.

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.

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: Nothing

Cons: Everything

Pros: Got an aisle seat

Cons: Plane was late. No Wi-Fi.

Pros: Food was great

Pros: On time!

Cons: Boarding group is getting huge!!!

Pros: there was an open seat between aisle and window seat!!! however I did pay extra $40 for that seat. so nice to be able to move without constantly knocking into person sitting smashed next to you! great AA crew, polite & professional. on time departure and arrival. comfortable cabin, seats

Cons: would be nice to have individual entertainment screen - instead it was above every few seats

Pros: The airlines don't allow enough room to sit comfortably. I am 6' 2" 250 lbs. My knees touch the back of the seat in front of me and there is no room side to side. Very uncomfortable.

Pros: Plane was clean

Cons: My belongings stolen

Pros: Punctual, connexion gate very close

Pros: We left early

Pros: Nothing

Cons: I missed my flight due to Tsa

Pros: One of the flight attendants was nice.

Cons: 5+ hours and just some bagged snacks. Had to wait forever for soda. Screen was difficult to work - touch wasn’t working. Much smaller program selection than flights 6 days ago from RSW to LAX via ATL.

Pros: Everything went smoothly. Baggage was at carousel before we were, a first.

Cons: Everything was fine.

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.

Cons: Website would not let me check in the day before or the morning or my flight. There was an error every time and I almost got to the end once. I could not change the time of my transportation and arrived 10 minutes past the check in deadline (an hour prior to the flight taking off). I was refused access to the flight and offered a flight 5 hours later. The staff was rude and not helpful. I had heard negative things about Frontier and now I know why.

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

Pros: THe passengers were well behave during and polite

Cons: The 2 hour flight delay

Cons: Connecting flight was delayed by one hour!!!!!

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.

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: THe passengers were well behave during and polite

Cons: The 2 hour flight delay

Pros: THe passengers were well behave during and polite

Cons: The 2 hour flight delay

Pros: The clerk was accommodating enough to look up other airlines where I could purchase another ticket. She also told me to never trust the alerts or website and to show up on scheduled time. I wish I had known this an hour earlier and $400 later. Thanks Frontier!

Cons: Got alerts from Frontier and checked their website and both said that the flight had been delayed an hour and a half. I showed up an hour before the delayed departure time and the clerk told me that the plane was loading and I would not be able to board. I understand I should have showed up earlier but my rating is based on the dishonesty of the time I was given.

Cons: Website would not let me check in the day before or the morning or my flight. There was an error every time and I almost got to the end once. I could not change the time of my transportation and arrived 10 minutes past the check in deadline (an hour prior to the flight taking off). I was refused access to the flight and offered a flight 5 hours later. The staff was rude and not helpful. I had heard negative things about Frontier and now I know why.

Cons: The crew was rude to the passengers. They charge form 9$ to 40$ for seat selection. Charge for a Carry on bag (anything that doesn't fit under your seat). The flights had maintenance issue, hence delayed. I will absolutely avoid traveling with frontier in the future.

Pros: On time!

Pros: Personal entertainment system

Cons: Boarding group is getting huge!!!

Pros: Good flight with no issues.

Cons: No complaints

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: The clerk was accommodating enough to look up other airlines where I could purchase another ticket. She also told me to never trust the alerts or website and to show up on scheduled time. I wish I had known this an hour earlier and $400 later. Thanks Frontier!

Cons: Got alerts from Frontier and checked their website and both said that the flight had been delayed an hour and a half. I showed up an hour before the delayed departure time and the clerk told me that the plane was loading and I would not be able to board. I understand I should have showed up earlier but my rating is based on the dishonesty of the time I was given.

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: THe passengers were well behave during and polite

Cons: The 2 hour flight delay

Cons: Boarding group is getting huge!!!

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.

Pros: Got an aisle seat

Cons: Plane was late. No Wi-Fi.

Cons: Flight was 65 mins delayed due to mechanical issues. Updates came from flight attendants insisting gate agents update the flight status.

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.

Cons: The crew was rude to the passengers. They charge form 9$ to 40$ for seat selection. Charge for a Carry on bag (anything that doesn't fit under your seat). The flights had maintenance issue, hence delayed. I will absolutely avoid traveling with frontier in the future.

Cons: Too many hiccups on Frontier website. Hidden fees and/or charges for everything. Delayed flights. Unfriendly team.

Pros: THe passengers were well behave during and polite

Cons: The 2 hour flight delay

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.

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

Cons: Connecting flight was delayed by one hour!!!!!

Cons: Too many hiccups on Frontier website. Hidden fees and/or charges for everything. Delayed flights. Unfriendly team.

Pros: Plane was clean

Cons: My belongings stolen

Pros: The airlines don't allow enough room to sit comfortably. I am 6' 2" 250 lbs. My knees touch the back of the seat in front of me and there is no room side to side. Very uncomfortable.

Pros: Seats

Cons: WiFi was weak...things were stolen out of my carry on checked at the gate in Charlotte...I had the only bag checked at the gate.

Cons: Poor they lost my luggage. They did not allowed me to take my suitcas whit me because the plan was too small. I never travel again whit amercan airlines

Cons: Website would not let me check in the day before or the morning or my flight. There was an error every time and I almost got to the end once. I could not change the time of my transportation and arrived 10 minutes past the check in deadline (an hour prior to the flight taking off). I was refused access to the flight and offered a flight 5 hours later. The staff was rude and not helpful. I had heard negative things about Frontier and now I know why.

Cons: The crew was rude to the passengers. They charge form 9$ to 40$ for seat selection. Charge for a Carry on bag (anything that doesn't fit under your seat). The flights had maintenance issue, hence delayed. I will absolutely avoid traveling with frontier in the future.

Pros: THe passengers were well behave during and polite

Cons: The 2 hour flight delay

Pros: The clerk was accommodating enough to look up other airlines where I could purchase another ticket. She also told me to never trust the alerts or website and to show up on scheduled time. I wish I had known this an hour earlier and $400 later. Thanks Frontier!

Cons: Got alerts from Frontier and checked their website and both said that the flight had been delayed an hour and a half. I showed up an hour before the delayed departure time and the clerk told me that the plane was loading and I would not be able to board. I understand I should have showed up earlier but my rating is based on the dishonesty of the time I was given.

Pros: I was in business class and the individual cubicles were so comfortable. I slept well. The airline attendant was so attentive and helpful

Cons: Going through LAX what a mess

Cons: On both segments of the trip American changed my seat which I. I’d not realize until boarding. Way to late to protest. You pay for preferred seating but then get bumped to a lousy seat with no explanation. Likely because I was a single traveler and an American employee wanted my seat. Better not happen on the return flight

Pros: It was quick.

Cons: Flying these days is no better than taking a local bus.

Pros: Puntual, connexion gates very closed,

Cons: I need to paid 100$ or more to have a seat

Pros: Everything was fine. Delta did a great job.

Cons: The kid screaming in my ear for 3 hours

Pros: Nothing

Cons: I missed my flight due to Tsa

Pros: One of the flight attendants was nice.

Cons: 5+ hours and just some bagged snacks. Had to wait forever for soda. Screen was difficult to work - touch wasn’t working. Much smaller program selection than flights 6 days ago from RSW to LAX via ATL.

Pros: Nice people

Cons: Waiting at gate in KC

Pros: Friendly staff and fast service.

Pros: The arrival gate was extemely close to the departing gate. I did not have to walk the usually long and exhausting distance from one terminal to another. Thank goodness.

Cons: Broarding was well organized by groups andmoved quickly. The choice of dinner was not an option. By the time the stewardess reached me, only pasta was left. But having italian gelato for dessert was an acceptable compensation. Breakfast ,however, was ho..hummm without any redeeming compensation. choice of beverages was refreshing.

Pros: Wonderful timely departure and landing

Cons: None

Pros: The flight was fine, despite the distance.

Pros: I was in business class and the individual cubicles were so comfortable. I slept well. The airline attendant was so attentive and helpful

Cons: Going through LAX what a mess

Pros: The airlines don't allow enough room to sit comfortably. I am 6' 2" 250 lbs. My knees touch the back of the seat in front of me and there is no room side to side. Very uncomfortable.

Cons: They lost my luggage. They did not allow me to take her whit me in the plane because i did not fit a suitcase that always travel on top because is small suitcase terrible I will never travel again with amercan airlines

Pros: Puntual, connexion gates very closed,

Cons: I need to paid 100$ or more to have a seat

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.

Cons: The crew was rude to the passengers. They charge form 9$ to 40$ for seat selection. Charge for a Carry on bag (anything that doesn't fit under your seat). The flights had maintenance issue, hence delayed. I will absolutely avoid traveling with frontier in the future.

Pros: The clerk was accommodating enough to look up other airlines where I could purchase another ticket. She also told me to never trust the alerts or website and to show up on scheduled time. I wish I had known this an hour earlier and $400 later. Thanks Frontier!

Cons: Got alerts from Frontier and checked their website and both said that the flight had been delayed an hour and a half. I showed up an hour before the delayed departure time and the clerk told me that the plane was loading and I would not be able to board. I understand I should have showed up earlier but my rating is based on the dishonesty of the time I was given.

Pros: Nothing

Cons: Everything