Trips

Find Cheap Flights from San Francisco to Denver International (SFO - DEN)

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Fri 8/17
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San Francisco to Denver International Flight Information

Avg. Flight Duration 2h 38m
Flights Arrive in Denver International
Flights Depart from San Francisco
Flight Price $107
Distance 965 miles
Airlines Frontier, United

Good to Know

Low Season:
January
Best time to beat the crowds
2%
expected price decrease
High Season:
June
Most popular time to fly
16%
expected price increase
Average Price:
$188
(avg. price over the last 2 weeks)
Good Deal:
$128
or less (round trip)

When to Book Flights from San Francisco to Denver International

Average price per month
Flight prices as travel date approaches
-1 day
-2 days

Top Tips for Finding a Cheap Flight

Looking for a cheap flight? 25% of our users found flights on this route for $128 or less.
The cheapest flight from San Francisco to Denver International was found 30 days before departure, on average.
Book at least 2 weeks before departure in order to get a below-average price.
High season is considered to be May, June and July. The cheapest month to fly is January.
Morning departure is around 30% more expensive than an evening flight, on average*.
*Average of the lowest prices shown in KAYAK’s search results for departures within the next 30 days

FAQs for Booking San Francisco to Denver International Flights

How long does a flight from San Francisco to Denver International take?
An average nonstop flight takes 2h 25m, covering a distance of 965 miles.
How many flights are there between San Francisco and Denver International?
There are 706 (nonstop) flights between San Francisco and Denver International per week, averaging 102 per day.
Which airlines provide the cheapest flights from San Francisco to Denver International?
In the past 3 days, the cheapest round-trip tickets were found on Frontier ($107) and United ($184)
Do I need a passport to fly between San Francisco and Denver International?
No.
Which airlines fly most frequently between San Francisco and Denver International?
Air Canada (28 times daily), Air New Zealand (26 times daily), United (24 times daily) are the most frequent flyers on this route.
What’s the cheapest day of the week to fly San Francisco to Denver International?
For San Francisco to Denver International, Monday is the cheapest day to fly on average and Wednesday is the most expensive. Flying from Denver International back to San Francisco, the best deals are generally found on Wednesday, with Friday being the most expensive.

Book cheap flights from San Francisco to Denver International (round-trip)

Airports
Origin
San Francisco
$107
only
$107
Destination
Denver
$107
only
$107
Mon, Aug 27
SFO
San Francisco
DEN
Denver International
2h 25m
Wed, Sep 5
DEN
Denver International
SFO
San Francisco
2h 48m
Trip: 10 days
4.9OkayShow reviews
Overall 4.9 Okay
Based on 643 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
SFO
DEN
Okay 4.6

Price for flight was good.

Charge you for everything including carry on when we left Charlotte, buy not on the way back. Almost as much as the flight on the way out. Employees were rude in Charlotte but ok on planes and in San Francisco and Denver. Long flight delay in Denver on the way out. Not sure I will fly again. This was my first time on Frontier.

SFO
DEN
Mediocre 2.0

Nothing

The fight was delayed 3hrs

SFO
DEN
Mediocre 2.0

The fact that I almost got home. Almost.

After 4 hours of no information as to why the plane was not boarding, we boarded. Then we were asked to exit the plane and told it was cancelled. Then we had to wait 8 hours with the worst customer service and had to book a flight with United in order to st home. Awful experience.

SFO
DEN
Mediocre 2.0

My flight from SFO to Denver was canceled and I missed this flight. Had to pay more money for a mnother flight.

SFO
DEN
Mediocre 2.0

My flight was cacelled. Me amonst other passenger did not get a voucher for a hotel. So I spent 18hours at the SFO airport. My layover in Denver then was 9hours. By the time I got to Phoenix I have been travelling over 29hours. On top of it all I was charged for my baggage as well as my backpack

Wed, Sep 12
SFO
San Francisco
DEN
Denver International
2h 30m
Sun, Sep 16
DEN
Denver International
SFO
San Francisco
2h 38m
Trip: 5 days
6.9GoodShow reviews
Overall 6.9 Good
Based on 182 reviews
Overall
7.2
Boarding
7.4
Comfort
7.0
Crew
7.7
Entertainment
6.5
Food
6.5
SFO
DEN
Mediocre 3.0

Flight delayed over an hour. Connecting flight was held but luggage was left behind and had to be retrieved late the next night.

SFO
DEN
Mediocre 3.0

Crew was nice.

The seats and leg room is way to small and crowded.

SFO
DEN
Okay 5.0

staff were professional

airline overbooked the flight from SFO to DEN again. every time this happens, this leads to a huge customer disappoint and you lose faithful customers to other airlines, in the hope that the repeated overbooking won't happen again.

SFO
DEN
Excellent 10.0

It was incredible to get my flight moved up so my layover was much shorter.

SFO
DEN
Okay 4.6

Nothing

Travel first class during normal breakfast hours and your choice is Raisin Bran? This is the Way United cuts cost and treats there premium class members? Beyond that you are also required to pay for WiFi? I won’t bother flying United again.

Tue, Aug 28
SFO
San Francisco
DEN
Denver International
2h 25m
Wed, Sep 5
DEN
Denver International
SFO
San Francisco
2h 48m
Trip: 9 days
4.9OkayShow reviews
Overall 4.9 Okay
Based on 643 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
SFO
DEN
Mediocre 2.0

Nothing

The fight was delayed 3hrs

SFO
DEN
Okay 5.6

Frontier makes it easy to travel w infants. They let you board first. With an infant, they allow you to bring a stroller, car seat and breast pump and a diaper bag for the baby in addition to your personal item st no additional cost. I thought it would be impossible to be able to have everything I needed without breaking the bank when traveling across the United States.

SFO
DEN
Mediocre 2.0

The relented after I begged for a refund, but the customer services Dept is just about powerless to solve basic issues and take care of customers

Fly at your own peril, because they could leave you stranded for days if a single plan breaks down or become cancelled, as there is no plan B

SFO
DEN
Okay 4.0

The fact that every time I fly frontier, there is a delay

SFO
DEN
Mediocre 2.0

Flight crew were rude.

Tue, Sep 18
SFO
San Francisco
DEN
Denver International
2h 37m
Tue, Sep 25
DEN
Denver International
SFO
San Francisco
2h 48m
Trip: 8 days
4.9OkayShow reviews
Overall 4.9 Okay
Based on 643 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
SFO
DEN
Mediocre 2.0

Flight crew were rude.

SFO
DEN
Excellent 8.3

The flight was great. Everything you could expect from flying cross country.

The seats literally will break a back, I am in very good shape, I don't have back problems but this morning after my ride I have never had such a problem getting around. Love what you are trying to do bringing low cost airfare but the seats needs to be better

SFO
DEN
Okay 4.6

Price for flight was good.

Charge you for everything including carry on when we left Charlotte, buy not on the way back. Almost as much as the flight on the way out. Employees were rude in Charlotte but ok on planes and in San Francisco and Denver. Long flight delay in Denver on the way out. Not sure I will fly again. This was my first time on Frontier.

SFO
DEN
Mediocre 2.0

The fact that I almost got home. Almost.

After 4 hours of no information as to why the plane was not boarding, we boarded. Then we were asked to exit the plane and told it was cancelled. Then we had to wait 8 hours with the worst customer service and had to book a flight with United in order to st home. Awful experience.

SFO
DEN
Mediocre 2.0

Nothing

The fight was delayed 3hrs

Mon, Oct 8
SFO
San Francisco
DEN
Denver International
2h 28m
Tue, Oct 16
DEN
Denver International
SFO
San Francisco
2h 48m
Trip: 9 days
4.9OkayShow reviews
Overall 4.9 Okay
Based on 643 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
SFO
DEN
Mediocre 2.0

My flight was cacelled. Me amonst other passenger did not get a voucher for a hotel. So I spent 18hours at the SFO airport. My layover in Denver then was 9hours. By the time I got to Phoenix I have been travelling over 29hours. On top of it all I was charged for my baggage as well as my backpack

SFO
DEN
Okay 4.6

Price for flight was good.

Charge you for everything including carry on when we left Charlotte, buy not on the way back. Almost as much as the flight on the way out. Employees were rude in Charlotte but ok on planes and in San Francisco and Denver. Long flight delay in Denver on the way out. Not sure I will fly again. This was my first time on Frontier.

SFO
DEN
Mediocre 2.0

Nothing

The fight was delayed 3hrs

SFO
DEN
Mediocre 3.6

On time

Small tight seats no recline nopocket

SFO
DEN
Mediocre 2.0

The relented after I begged for a refund, but the customer services Dept is just about powerless to solve basic issues and take care of customers

Fly at your own peril, because they could leave you stranded for days if a single plan breaks down or become cancelled, as there is no plan B

Mon, Nov 5
SFO
San Francisco
DEN
Denver International
2h 35m
Tue, Nov 13
DEN
Denver International
SFO
San Francisco
2h 54m
Trip: 9 days
4.9OkayShow reviews
Overall 4.9 Okay
Based on 643 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
SFO
DEN
Okay 4.6

Price for flight was good.

Charge you for everything including carry on when we left Charlotte, buy not on the way back. Almost as much as the flight on the way out. Employees were rude in Charlotte but ok on planes and in San Francisco and Denver. Long flight delay in Denver on the way out. Not sure I will fly again. This was my first time on Frontier.

SFO
DEN
Mediocre 2.0

The fact that I almost got home. Almost.

After 4 hours of no information as to why the plane was not boarding, we boarded. Then we were asked to exit the plane and told it was cancelled. Then we had to wait 8 hours with the worst customer service and had to book a flight with United in order to st home. Awful experience.

SFO
DEN
Mediocre 2.0

Nothing

The fight was delayed 3hrs

SFO
DEN
Mediocre 2.0

My flight was cacelled. Me amonst other passenger did not get a voucher for a hotel. So I spent 18hours at the SFO airport. My layover in Denver then was 9hours. By the time I got to Phoenix I have been travelling over 29hours. On top of it all I was charged for my baggage as well as my backpack

SFO
DEN
Okay 5.6

Frontier makes it easy to travel w infants. They let you board first. With an infant, they allow you to bring a stroller, car seat and breast pump and a diaper bag for the baby in addition to your personal item st no additional cost. I thought it would be impossible to be able to have everything I needed without breaking the bank when traveling across the United States.

Tue, Sep 11
SFO
San Francisco
DEN
Denver International
2h 37m
Tue, Sep 18
DEN
Denver International
SFO
San Francisco
2h 36m
Trip: 8 days
4.9OkayShow reviews
Overall 4.9 Okay
Based on 643 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
SFO
DEN
Mediocre 3.3

Crew were very nice

$3 for soft drink. Late flight on departure and return. Won't fly Frontier again.

SFO
DEN
Mediocre 2.0

My flight from SFO to Denver was canceled and I missed this flight. Had to pay more money for a mnother flight.

SFO
DEN
Excellent 8.3

The flight was great. Everything you could expect from flying cross country.

The seats literally will break a back, I am in very good shape, I don't have back problems but this morning after my ride I have never had such a problem getting around. Love what you are trying to do bringing low cost airfare but the seats needs to be better

SFO
DEN
Okay 4.0

The fact that every time I fly frontier, there is a delay

SFO
DEN
Okay 5.6

Frontier makes it easy to travel w infants. They let you board first. With an infant, they allow you to bring a stroller, car seat and breast pump and a diaper bag for the baby in addition to your personal item st no additional cost. I thought it would be impossible to be able to have everything I needed without breaking the bank when traveling across the United States.

Tue, Oct 16
SFO
San Francisco
DEN
Denver International
2h 28m
Sat, Oct 20
DEN
Denver International
SFO
San Francisco
2h 48m
Trip: 5 days
4.9OkayShow reviews
Overall 4.9 Okay
Based on 643 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
SFO
DEN
Mediocre 2.0

Nothing

The fight was delayed 3hrs

SFO
DEN
Excellent 8.3

The flight was great. Everything you could expect from flying cross country.

The seats literally will break a back, I am in very good shape, I don't have back problems but this morning after my ride I have never had such a problem getting around. Love what you are trying to do bringing low cost airfare but the seats needs to be better

SFO
DEN
Mediocre 3.3

Crew were very nice

$3 for soft drink. Late flight on departure and return. Won't fly Frontier again.

SFO
DEN
Okay 4.6

Price for flight was good.

Charge you for everything including carry on when we left Charlotte, buy not on the way back. Almost as much as the flight on the way out. Employees were rude in Charlotte but ok on planes and in San Francisco and Denver. Long flight delay in Denver on the way out. Not sure I will fly again. This was my first time on Frontier.

SFO
DEN
Mediocre 2.0

The fact that I almost got home. Almost.

After 4 hours of no information as to why the plane was not boarding, we boarded. Then we were asked to exit the plane and told it was cancelled. Then we had to wait 8 hours with the worst customer service and had to book a flight with United in order to st home. Awful experience.

Mon, Dec 24
SFO
San Francisco
DEN
Denver International
2h 29m
Mon, Jan 7
DEN
Denver International
SFO
San Francisco
2h 47m
Trip: 15 days
6.9GoodShow reviews
Overall 6.9 Good
Based on 182 reviews
Overall
7.2
Boarding
7.4
Comfort
7.0
Crew
7.7
Entertainment
6.5
Food
6.5
SFO
DEN
Good 6.0

Flight delayed for 50 minutes, then again for 30 minutes, then again for 20 minutes, etc...

SFO
DEN
Excellent 8.3

The food choices were good and the service was excellent, Always kind and responsive to my needs and attentive.

Boarding could be done by letting people with window seats being seated first, then the middle seats next and finally aisle seats last! That way people would not have to get up from their seats after they have been sitting down to get back up to allow the people in the inner seat to get to their seats a pond boarding the plane after the people in the aisle seat are already sitting!

SFO
DEN
Okay 4.0

Pretty sure my flight attendant was racist though I have no way of proving it. She was downright rude to me, and not a second later was overly courteous to the old, white male sitting in front of me. Also, they were really secretive about offering free drinks. Miserly a**holes didn't want to announce it so when I ordered a vodka they quietly told me it was free. So quietly in fact, that not even my wife sitting next to me heard it.

SFO
DEN
Mediocre 3.0

Crew was nice.

The seats and leg room is way to small and crowded.

SFO
DEN
Excellent 10.0

It was incredible to get my flight moved up so my layover was much shorter.

Sun, Aug 26
SFO
San Francisco
DEN
Denver International
2h 25m
Tue, Aug 28
DEN
Denver International
SFO
San Francisco
2h 43m
Trip: 3 days
4.9OkayShow reviews
Overall 4.9 Okay
Based on 643 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
SFO
DEN
Mediocre 2.0

Nothing

The fight was delayed 3hrs

SFO
DEN
Mediocre 2.0

My flight was cacelled. Me amonst other passenger did not get a voucher for a hotel. So I spent 18hours at the SFO airport. My layover in Denver then was 9hours. By the time I got to Phoenix I have been travelling over 29hours. On top of it all I was charged for my baggage as well as my backpack

SFO
DEN
Okay 4.6

Price for flight was good.

Charge you for everything including carry on when we left Charlotte, buy not on the way back. Almost as much as the flight on the way out. Employees were rude in Charlotte but ok on planes and in San Francisco and Denver. Long flight delay in Denver on the way out. Not sure I will fly again. This was my first time on Frontier.

SFO
DEN
Mediocre 3.6

On time

Small tight seats no recline nopocket

SFO
DEN
Okay 5.6

Frontier makes it easy to travel w infants. They let you board first. With an infant, they allow you to bring a stroller, car seat and breast pump and a diaper bag for the baby in addition to your personal item st no additional cost. I thought it would be impossible to be able to have everything I needed without breaking the bank when traveling across the United States.

Sat, Jan 5
SFO
San Francisco
DEN
Denver International
2h 31m
Sat, Jan 12
DEN
Denver International
SFO
San Francisco
2h 43m
Trip: 8 days
6.9GoodShow reviews
Overall 6.9 Good
Based on 182 reviews
Overall
7.2
Boarding
7.4
Comfort
7.0
Crew
7.7
Entertainment
6.5
Food
6.5
SFO
DEN
Okay 5.0

staff were professional

airline overbooked the flight from SFO to DEN again. every time this happens, this leads to a huge customer disappoint and you lose faithful customers to other airlines, in the hope that the repeated overbooking won't happen again.

SFO
DEN
Mediocre 3.0

Crew was nice.

The seats and leg room is way to small and crowded.

SFO
DEN
Okay 4.0

Pretty sure my flight attendant was racist though I have no way of proving it. She was downright rude to me, and not a second later was overly courteous to the old, white male sitting in front of me. Also, they were really secretive about offering free drinks. Miserly a**holes didn't want to announce it so when I ordered a vodka they quietly told me it was free. So quietly in fact, that not even my wife sitting next to me heard it.

SFO
DEN
Mediocre 3.0

It was a quick flight.

They ran out of baggage space quickly. United needs to police bag sizes more. It’s not fair that people boarding the plane in the second half should have to check a bag because the first half of people brought on way oversized carry on bags and took up more than their fair share of space.

SFO
DEN
Good 6.0

Staff was nice!

I didn't like the luggage restrictions associated with our tickets.

Mon, Dec 3
SFO
San Francisco
DEN
Denver International
2h 35m
Tue, Dec 4
DEN
Denver International
SFO
San Francisco
2h 44m
Trip: 2 days
4.9OkayShow reviews
Overall 4.9 Okay
Based on 643 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
SFO
DEN
Mediocre 3.6

On time

Small tight seats no recline nopocket

SFO
DEN
Mediocre 2.0

My flight was cacelled. Me amonst other passenger did not get a voucher for a hotel. So I spent 18hours at the SFO airport. My layover in Denver then was 9hours. By the time I got to Phoenix I have been travelling over 29hours. On top of it all I was charged for my baggage as well as my backpack

SFO
DEN
Mediocre 2.0

The fact that I almost got home. Almost.

After 4 hours of no information as to why the plane was not boarding, we boarded. Then we were asked to exit the plane and told it was cancelled. Then we had to wait 8 hours with the worst customer service and had to book a flight with United in order to st home. Awful experience.

SFO
DEN
Excellent 8.3

The flight was great. Everything you could expect from flying cross country.

The seats literally will break a back, I am in very good shape, I don't have back problems but this morning after my ride I have never had such a problem getting around. Love what you are trying to do bringing low cost airfare but the seats needs to be better

SFO
DEN
Okay 4.6

Price for flight was good.

Charge you for everything including carry on when we left Charlotte, buy not on the way back. Almost as much as the flight on the way out. Employees were rude in Charlotte but ok on planes and in San Francisco and Denver. Long flight delay in Denver on the way out. Not sure I will fly again. This was my first time on Frontier.

Tue, Feb 5
SFO
San Francisco
DEN
Denver International
2h 35m
Sun, Feb 10
DEN
Denver International
SFO
San Francisco
2h 47m
Trip: 6 days
4.9OkayShow reviews
Overall 4.9 Okay
Based on 643 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
SFO
DEN
Mediocre 3.6

On time

Small tight seats no recline nopocket

SFO
DEN
Mediocre 2.0

Nothing

The fight was delayed 3hrs

SFO
DEN
Okay 4.6

Price for flight was good.

Charge you for everything including carry on when we left Charlotte, buy not on the way back. Almost as much as the flight on the way out. Employees were rude in Charlotte but ok on planes and in San Francisco and Denver. Long flight delay in Denver on the way out. Not sure I will fly again. This was my first time on Frontier.

SFO
DEN
Mediocre 3.3

Crew were very nice

$3 for soft drink. Late flight on departure and return. Won't fly Frontier again.

SFO
DEN
Mediocre 2.0

My flight from SFO to Denver was canceled and I missed this flight. Had to pay more money for a mnother flight.

Fri, Oct 5
SFO
San Francisco
DEN
Denver International
2h 28m
Mon, Oct 8
DEN
Denver International
SFO
San Francisco
5h 40m
Trip: 4 days
4.9OkayShow reviews
Overall 4.9 Okay
Based on 643 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
SFO
DEN
Mediocre 2.0

Flight crew were rude.

SFO
DEN
Mediocre 2.0

My flight from SFO to Denver was canceled and I missed this flight. Had to pay more money for a mnother flight.

SFO
DEN
Mediocre 3.3

Crew were very nice

$3 for soft drink. Late flight on departure and return. Won't fly Frontier again.

SFO
DEN
Mediocre 2.0

The relented after I begged for a refund, but the customer services Dept is just about powerless to solve basic issues and take care of customers

Fly at your own peril, because they could leave you stranded for days if a single plan breaks down or become cancelled, as there is no plan B

SFO
DEN
Mediocre 2.0

Nothing

The fight was delayed 3hrs

Tue, Jan 8
SFO
San Francisco
DEN
Denver International
2h 35m
Sun, Jan 13
DEN
Denver International
SFO
San Francisco
2h 45m
Trip: 6 days
4.9OkayShow reviews
Overall 4.9 Okay
Based on 643 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
SFO
DEN
Mediocre 3.3

Crew were very nice

$3 for soft drink. Late flight on departure and return. Won't fly Frontier again.

SFO
DEN
Okay 4.0

The fact that every time I fly frontier, there is a delay

SFO
DEN
Okay 5.6

Frontier makes it easy to travel w infants. They let you board first. With an infant, they allow you to bring a stroller, car seat and breast pump and a diaper bag for the baby in addition to your personal item st no additional cost. I thought it would be impossible to be able to have everything I needed without breaking the bank when traveling across the United States.

SFO
DEN
Excellent 8.3

The flight was great. Everything you could expect from flying cross country.

The seats literally will break a back, I am in very good shape, I don't have back problems but this morning after my ride I have never had such a problem getting around. Love what you are trying to do bringing low cost airfare but the seats needs to be better

SFO
DEN
Mediocre 2.0

Nothing

The fight was delayed 3hrs

Wed, Nov 28
SFO
San Francisco
DEN
Denver International
2h 35m
Sun, Dec 2
DEN
Denver International
SFO
San Francisco
2h 54m
Trip: 5 days
4.9OkayShow reviews
Overall 4.9 Okay
Based on 643 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
SFO
DEN
Okay 5.6

Frontier makes it easy to travel w infants. They let you board first. With an infant, they allow you to bring a stroller, car seat and breast pump and a diaper bag for the baby in addition to your personal item st no additional cost. I thought it would be impossible to be able to have everything I needed without breaking the bank when traveling across the United States.

SFO
DEN
Mediocre 2.0

Flight crew were rude.

SFO
DEN
Mediocre 3.6

On time

Small tight seats no recline nopocket

SFO
DEN
Okay 4.0

The fact that every time I fly frontier, there is a delay

SFO
DEN
Mediocre 2.0

Nothing

The fight was delayed 3hrs

Wed, Aug 29
SFO
San Francisco
DEN
Denver International
2h 25m
Mon, Sep 3
DEN
Denver International
SFO
San Francisco
2h 43m
Trip: 6 days
4.9OkayShow reviews
Overall 4.9 Okay
Based on 643 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
SFO
DEN
Mediocre 2.0

The relented after I begged for a refund, but the customer services Dept is just about powerless to solve basic issues and take care of customers

Fly at your own peril, because they could leave you stranded for days if a single plan breaks down or become cancelled, as there is no plan B

SFO
DEN
Mediocre 2.0

Nothing

The fight was delayed 3hrs

SFO
DEN
Mediocre 3.6

On time

Small tight seats no recline nopocket

SFO
DEN
Excellent 8.3

The flight was great. Everything you could expect from flying cross country.

The seats literally will break a back, I am in very good shape, I don't have back problems but this morning after my ride I have never had such a problem getting around. Love what you are trying to do bringing low cost airfare but the seats needs to be better

SFO
DEN
Okay 4.0

The fact that every time I fly frontier, there is a delay

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Prices are per person and are for e–tickets and include all taxes & fees in USD.

We attempt to get accurate prices, however, prices are not guaranteed.

Here's why:

We’re not the seller.
At KAYAK we don’t set the prices, so it’s not possible for us to guarantee what other companies are selling.

We compile tonnes of data for you
Our service lets you quickly and easily compare results from hundreds of travel sites at once. In this sense, KAYAK is a search engine and we can't guarantee prices we find.

Why aren’t prices accurate 100% of the time?
Prices on airline seats, hotel rooms and car rentals can change frequently. Several people may also be trying to buy the same travel option simultaneously. As a result, you may find, on occasion, that certain prices are no longer available.

If you have more questions or if you have a bad price to report to us,
please send us an and someone from our team will get back to you promptly.

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The fares displayed include all taxes and fees for economy class travel and were found by the provider in the last 72 hours. Seats are limited and may not be available on all flights and days. Fares are subject to change and may not be available on all flights or dates of travel. Some carriers charge additional fees for extra checked bags. Please check the carriers' sites.

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