Find Cheap Flights from Colorado to San Francisco

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

Nothing

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.

THe passengers were well behave during and polite

The 2 hour flight delay

Fairly inexpensiveI

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.

The meal.

Very strict on baggage.. Even they don’t compromise for an additional kg in check in bag.you need to pay for most of the things.. even for a drink

very attentive steward, nice snack choices

they allowed too many late people to board after departure on a 100% full flight; not due to lines, but because they were late to the gate

comfortable seating, lots of movie choices. food and drink selections were nice.Galley snack choices were underwhelming

Staff was fair, but nothing compared to the service on JAL from CA to Tokyo. Very loud throughout the flight pushing the drink cart through the 8 Business Class rows instead of just delivering drinks to the 32 people in the section. Once the initial food & beverage service was complete, the service practically disappeared unless i sought them out in the galley.

The crew and the fact that they at least acted like they cared.

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.

Got an aisle seat

Plane was late. No Wi-Fi.

Boarding group is getting huge!!!

On time!

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.

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

THe passengers were well behave during and polite

The 2 hour flight delay

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

Nothing

Everything

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.

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.

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.

That it got me home

Was not allowed to check in even tho flight was delayed. Horrible!

Crew was great

Absolutely no entertainment for a flight that had way more people than my first one. Food options were horrible!

Crew members were all very friendly and made the flight a nice trip as best they could.

It would make a lot more sense for people to board from the back and window seats first so that we are not climbing over each other to get to our tiny seats.

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

Not to much

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.

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

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

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.

Nothing

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.

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

Nothing

Everything

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!

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.

Fairly inexpensiveI

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.

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.

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.

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.

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.

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

Nothing

Everything

Great flight experience overall!

First class seating comfort and service. Even my flight in the main cabin was relatively comfortable, but I'm a smaller stature person so... On time promise kept every flight.

Beverages and biscotti Variety of entertainment Great Crew!!!!!

Only bevarages and biscotti Free entertainment isnt free..$10 wifi charge AND requires personal viewing device Ridiculously small toilets....and only two for large main cabin

Great flight experience!

Clean, new, amplíe seats... in Economy!

45 min delay...

The seats had more legroom on this small 2+2 then the 3+3 we connected from.

No entertainment as we were unable to download the app needed and had no notice before we went to the airport. Because small plane and length of flight only snack items available and our connection was late getting us there and left us no time

Over size person sitting next to me. I was very tight in my space.

Flight was on time and arrived early!

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!

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.

Fairly inexpensiveI

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.

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.

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

First class seating comfort and service. Even my flight in the main cabin was relatively comfortable, but I'm a smaller stature person so... On time promise kept every flight.

Extreme noise from the plane at certain times (mostly takeoff which can't be helped, I guess) Sitting in the first row of first class you get the light from the flight attendant kitchen area right in your face (Seat 1A-3A specifically)

Very strict on baggage.. Even they don’t compromise for an additional kg in check in bag.you need to pay for most of the things.. even for a drink

First class seating comfort and service. Even my flight in the main cabin was relatively comfortable, but I'm a smaller stature person so... On time promise kept every flight.

Great flight experience!

I have never seen a gate attendant call each person by name as she scanned their boarding passes! At Delta I felt welcomed by every employee. Even the pilots greeted the passengers as they exited. All the other airlines just want my money, they want to cram me into smaller and smaller spaces and want me to sit there and shut up so they don't have to interact with me. I will fly Delta every chance I get, even if I have to pay more money.

That I mis my conecting flight to Washington do to one of the crew members being late

I did not like that they would not assign me a seat because the flight appeared to be oversold. Finally I was allowed to board (and it was a good seat location but the seat back was locked in the upright position and I wanted to knap)

Delta Flights are always enjoyable and the staff is always treats you with courtesy

The only thing I don't understand is how the planes are loaded. and this is only a comment and I know you and others carriers have there way of doing things. I just don't understand why you load the first section of the plane first and the back of the plane last, It looks like you would want to load the back and come forward so everyone is not getting hit and stood over while everyone is loading.

Great flight experience!

Asked for ginger ale, was not given one

First class seating comfort and service. Even my flight in the main cabin was relatively comfortable, but I'm a smaller stature person so... On time promise kept every flight.

Extreme noise from the plane at certain times (mostly takeoff which can't be helped, I guess) Sitting in the first row of first class you get the light from the flight attendant kitchen area right in your face (Seat 1A-3A specifically)

Very strict on baggage.. Even they don’t compromise for an additional kg in check in bag.you need to pay for most of the things.. even for a drink

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!

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.

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.

Fairly inexpensiveI

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.

Not to much

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.

Tight seating

Great service for my disabled uncle

Efficient

Small seat space

Plane was on time.

Even as I was checking in for the flight, as an economy traveler, I was constantly reminded of all the things I wasn’t entitled to -all boarding was based on how much you’d paid, not where you were sitting. I didn’t expect special treatment, but once you’re at the gate, boarding agents usually treat passengers equally. Not so with United.

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

Nothing

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.

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.

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!

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.

On time!

Leg space and seat

Plane was on time.

Even as I was checking in for the flight, as an economy traveler, I was constantly reminded of all the things I wasn’t entitled to -all boarding was based on how much you’d paid, not where you were sitting. I didn’t expect special treatment, but once you’re at the gate, boarding agents usually treat passengers equally. Not so with United.

Clean, new, amplíe seats... in Economy!

45 min delay...

Tight seating