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

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Wed 1/17
Wed 1/24
Any month
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Good to Know

Low Season:
October
Best time to beat the crowds
2%
expected price decrease
High Season:
November
Most popular time to fly
5%
expected price increase
Average Price:
$530
(avg. price over the last 2 weeks)
Good Deal:
$402
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 $401 or less.
The cheapest flight from San Francisco to Denver International was found 27 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 October, November and December. The cheapest month to fly is October.
Morning departure is around 6% cheaper 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 24m, covering a distance of 965 miles.
How many flights are there between San Francisco and Denver International?
There are 729 (nonstop) flights between San Francisco and Denver International per week, averaging 111 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 ($96)
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 New Zealand (21 times daily), United (21 times daily), Air Canada (20 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, Tuesday is the cheapest day to fly on average and Monday is the most expensive. Flying from Denver International back to San Francisco, the best deals are generally found on Saturday, with Tuesday being the most expensive.

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

Airports
Origin
San Francisco
$96
only
$96
Destination
Denver
$96
only
$96
Tue, Jan 30
SFO
DEN
2h 31m
Wed, Jan 31
DEN
SFO
2h 52m
Trip: 2 days
4.9OkayShow reviews
Overall 4.9 Okay
Based on 636 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
Excellent 8.0

Efficiency. Food prices were affordable.

Tight space. Limited bathrooms. $40 for carry on or checked baggage. Seat prices ranged from $5 to over $40. No inflight conveniences.

SFO
DEN
Okay 5.3

The Frontier app is easy to use

Uncomfortable seats. Expensive luggage- check in and carry on prices are the same and both high.

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

At the check in terminal someone did take my info to refund my flight to denver since it was delayed by 5 hours.

The flight was delayed five hours so I had to book a flight with another airliner prior to receiving a refund from frontier. Frontiers phone service is horrible. I coul not get a hold of a person to request a refund or book another flight. And the price of the trip does not include carry on baggage or free seat choice. This wa all extra.

Tue, Jan 23
SFO
DEN
2h 31m
Tue, Feb 6
DEN
SFO
2h 54m
Trip: 15 days
4.9OkayShow reviews
Overall 4.9 Okay
Based on 636 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
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 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

At the check in terminal someone did take my info to refund my flight to denver since it was delayed by 5 hours.

The flight was delayed five hours so I had to book a flight with another airliner prior to receiving a refund from frontier. Frontiers phone service is horrible. I coul not get a hold of a person to request a refund or book another flight. And the price of the trip does not include carry on baggage or free seat choice. This wa all extra.

SFO
DEN
Mediocre 2.0

Flight crew were rude.

Mon, Jan 29
SFO
DEN
2h 31m
Wed, Feb 7
DEN
SFO
2h 52m
Trip: 10 days
4.9OkayShow reviews
Overall 4.9 Okay
Based on 636 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 from SFO to Denver was canceled and I missed this flight. Had to pay more money for a mnother flight.

SFO
DEN
Okay 5.3

The Frontier app is easy to use

Uncomfortable seats. Expensive luggage- check in and carry on prices are the same and both high.

SFO
DEN
Mediocre 2.0

Flight was delayed 6 hrs while other flights to Denver kept taking off

SFO
DEN
Excellent 8.0

Quick boarding / deplaning

You have to PAY for a CARRY ON. That's just deceptive so I recommend doing the math when you book your next flight and go for other airlines even if their price is slightly higher than Frontier.

Mon, Jan 29
SFO
DEN
2h 31m
Wed, Feb 7
DEN
SFO
2h 52m
Trip: 10 days
4.9OkayShow reviews
Overall 4.9 Okay
Based on 636 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 from SFO to Denver was canceled and I missed this flight. Had to pay more money for a mnother flight.

SFO
DEN
Excellent 8.0

Quick boarding / deplaning

You have to PAY for a CARRY ON. That's just deceptive so I recommend doing the math when you book your next flight and go for other airlines even if their price is slightly higher than Frontier.

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

At the check in terminal someone did take my info to refund my flight to denver since it was delayed by 5 hours.

The flight was delayed five hours so I had to book a flight with another airliner prior to receiving a refund from frontier. Frontiers phone service is horrible. I coul not get a hold of a person to request a refund or book another flight. And the price of the trip does not include carry on baggage or free seat choice. This wa all extra.

SFO
DEN
Excellent 8.0

Efficiency. Food prices were affordable.

Tight space. Limited bathrooms. $40 for carry on or checked baggage. Seat prices ranged from $5 to over $40. No inflight conveniences.

Tue, Feb 20
SFO
DEN
2h 24m
Wed, Feb 21
DEN
SFO
2h 52m
Trip: 2 days
4.9OkayShow reviews
Overall 4.9 Okay
Based on 636 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 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
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

Nothing

The fight was delayed 3hrs

SFO
DEN
Excellent 8.0

Efficiency. Food prices were affordable.

Tight space. Limited bathrooms. $40 for carry on or checked baggage. Seat prices ranged from $5 to over $40. No inflight conveniences.

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

Tue, Feb 27
SFO
DEN
2h 24m
Wed, Feb 28
DEN
SFO
2h 52m
Trip: 2 days
4.9OkayShow reviews
Overall 4.9 Okay
Based on 636 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
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

SFO
DEN
Mediocre 2.0

Flight crew were rude.

SFO
DEN
Okay 5.3

The Frontier app is easy to use

Uncomfortable seats. Expensive luggage- check in and carry on prices are the same and both high.

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, Jan 30
SFO
DEN
2h 31m
Wed, Feb 7
DEN
SFO
2h 52m
Trip: 9 days
4.9OkayShow reviews
Overall 4.9 Okay
Based on 636 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 8.0

Quick boarding / deplaning

You have to PAY for a CARRY ON. That's just deceptive so I recommend doing the math when you book your next flight and go for other airlines even if their price is slightly higher than 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
Okay 5.3

The Frontier app is easy to use

Uncomfortable seats. Expensive luggage- check in and carry on prices are the same and both high.

SFO
DEN
Mediocre 2.0

Nothing

The fight was delayed 3hrs

Tue, Feb 6
SFO
DEN
2h 34m
Wed, Feb 14
DEN
SFO
2h 52m
Trip: 9 days
4.9OkayShow reviews
Overall 4.9 Okay
Based on 636 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
SFO
DEN
Mediocre 2.0

At the check in terminal someone did take my info to refund my flight to denver since it was delayed by 5 hours.

The flight was delayed five hours so I had to book a flight with another airliner prior to receiving a refund from frontier. Frontiers phone service is horrible. I coul not get a hold of a person to request a refund or book another flight. And the price of the trip does not include carry on baggage or free seat choice. This wa all extra.

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 was delayed 6 hrs while other flights to Denver kept taking off

SFO
DEN
Mediocre 2.0

Nothing

The fight was delayed 3hrs

SFO
DEN
Excellent 8.0

Efficiency. Food prices were affordable.

Tight space. Limited bathrooms. $40 for carry on or checked baggage. Seat prices ranged from $5 to over $40. No inflight conveniences.

Wed, Feb 7
SFO
DEN
2h 45m
Tue, Feb 13
DEN
SFO
2h 54m
Trip: 7 days
4.9OkayShow reviews
Overall 4.9 Okay
Based on 636 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
SFO
DEN
Okay 5.3

The Frontier app is easy to use

Uncomfortable seats. Expensive luggage- check in and carry on prices are the same and both high.

SFO
DEN
Mediocre 2.0

Nothing

The fight was delayed 3hrs

SFO
DEN
Mediocre 2.0

Flight was delayed 6 hrs while other flights to Denver kept taking off

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

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

Tue, Feb 13
SFO
DEN
2h 34m
Wed, Feb 14
DEN
SFO
2h 52m
Trip: 2 days
4.9OkayShow reviews
Overall 4.9 Okay
Based on 636 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 was delayed 6 hrs while other flights to Denver kept taking off

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 8.0

Quick boarding / deplaning

You have to PAY for a CARRY ON. That's just deceptive so I recommend doing the math when you book your next flight and go for other airlines even if their price is slightly higher than Frontier.

SFO
DEN
Mediocre 2.0

Flight crew were rude.

SFO
DEN
Excellent 8.0

Efficiency. Food prices were affordable.

Tight space. Limited bathrooms. $40 for carry on or checked baggage. Seat prices ranged from $5 to over $40. No inflight conveniences.

Tue, Jan 23
SFO
DEN
2h 31m
Wed, Jan 24
DEN
SFO
2h 52m
Trip: 2 days
4.9OkayShow reviews
Overall 4.9 Okay
Based on 636 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
SFO
DEN
Excellent 8.0

Efficiency. Food prices were affordable.

Tight space. Limited bathrooms. $40 for carry on or checked baggage. Seat prices ranged from $5 to over $40. No inflight conveniences.

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
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

Flight crew were rude.

SFO
DEN
Mediocre 2.0

Flight was delayed 6 hrs while other flights to Denver kept taking off

Tue, Mar 13
SFO
DEN
2h 41m
Wed, Mar 14
DEN
SFO
2h 47m
Trip: 2 days
4.9OkayShow reviews
Overall 4.9 Okay
Based on 636 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
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
Excellent 8.0

Efficiency. Food prices were affordable.

Tight space. Limited bathrooms. $40 for carry on or checked baggage. Seat prices ranged from $5 to over $40. No inflight conveniences.

SFO
DEN
Mediocre 2.0

Flight was delayed 6 hrs while other flights to Denver kept taking off

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 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, Jan 22
SFO
DEN
2h 31m
Tue, Jan 30
DEN
SFO
2h 54m
Trip: 9 days
4.9OkayShow reviews
Overall 4.9 Okay
Based on 636 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
Excellent 8.0

Quick boarding / deplaning

You have to PAY for a CARRY ON. That's just deceptive so I recommend doing the math when you book your next flight and go for other airlines even if their price is slightly higher than Frontier.

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

Tue, Jan 23
SFO
DEN
2h 34m
Wed, Jan 31
DEN
SFO
2h 47m
Trip: 9 days
4.9OkayShow reviews
Overall 4.9 Okay
Based on 636 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 2.0

Flight crew were rude.

SFO
DEN
Mediocre 2.0

At the check in terminal someone did take my info to refund my flight to denver since it was delayed by 5 hours.

The flight was delayed five hours so I had to book a flight with another airliner prior to receiving a refund from frontier. Frontiers phone service is horrible. I coul not get a hold of a person to request a refund or book another flight. And the price of the trip does not include carry on baggage or free seat choice. This wa all extra.

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.

Wed, Jan 24
SFO
DEN
2h 45m
Thu, Feb 1
DEN
SFO
2h 54m
Trip: 9 days
4.9OkayShow reviews
Overall 4.9 Okay
Based on 636 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
Excellent 8.0

Quick boarding / deplaning

You have to PAY for a CARRY ON. That's just deceptive so I recommend doing the math when you book your next flight and go for other airlines even if their price is slightly higher than 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

Flight was delayed 6 hrs while other flights to Denver kept taking off

Thu, Jan 25
SFO
DEN
2h 31m
Wed, Feb 7
DEN
SFO
2h 52m
Trip: 14 days
4.9OkayShow reviews
Overall 4.9 Okay
Based on 636 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 was delayed 6 hrs while other flights to Denver kept taking off

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
Okay 5.3

The Frontier app is easy to use

Uncomfortable seats. Expensive luggage- check in and carry on prices are the same and both high.

SFO
DEN
Excellent 8.0

Efficiency. Food prices were affordable.

Tight space. Limited bathrooms. $40 for carry on or checked baggage. Seat prices ranged from $5 to over $40. No inflight conveniences.

SFO
DEN
Mediocre 2.0

Flight crew were rude.

Sat, Jan 27
SFO
DEN
2h 31m
Tue, Feb 13
DEN
SFO
2h 54m
Trip: 18 days
4.9OkayShow reviews
Overall 4.9 Okay
Based on 636 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
SFO
DEN
Mediocre 2.0

At the check in terminal someone did take my info to refund my flight to denver since it was delayed by 5 hours.

The flight was delayed five hours so I had to book a flight with another airliner prior to receiving a refund from frontier. Frontiers phone service is horrible. I coul not get a hold of a person to request a refund or book another flight. And the price of the trip does not include carry on baggage or free seat choice. This wa all extra.

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 8.0

Efficiency. Food prices were affordable.

Tight space. Limited bathrooms. $40 for carry on or checked baggage. Seat prices ranged from $5 to over $40. No inflight conveniences.

SFO
DEN
Okay 5.3

The Frontier app is easy to use

Uncomfortable seats. Expensive luggage- check in and carry on prices are the same and both high.

SFO
DEN
Mediocre 2.0

Nothing

The fight was delayed 3hrs

Mon, Jan 29
SFO
DEN
2h 31m
Wed, Jan 31
DEN
SFO
2h 52m
Trip: 3 days
4.9OkayShow reviews
Overall 4.9 Okay
Based on 636 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 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

At the check in terminal someone did take my info to refund my flight to denver since it was delayed by 5 hours.

The flight was delayed five hours so I had to book a flight with another airliner prior to receiving a refund from frontier. Frontiers phone service is horrible. I coul not get a hold of a person to request a refund or book another flight. And the price of the trip does not include carry on baggage or free seat choice. This wa all extra.

SFO
DEN
Mediocre 2.0

Flight crew were rude.

SFO
DEN
Mediocre 2.0

Flight was delayed 6 hrs while other flights to Denver kept taking off

Tue, Jan 30
SFO
DEN
2h 31m
Wed, Feb 7
DEN
SFO
2h 52m
Trip: 9 days
4.9OkayShow reviews
Overall 4.9 Okay
Based on 636 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
SFO
DEN
Excellent 8.0

Quick boarding / deplaning

You have to PAY for a CARRY ON. That's just deceptive so I recommend doing the math when you book your next flight and go for other airlines even if their price is slightly higher than Frontier.

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

Flight crew were rude.

SFO
DEN
Mediocre 2.0

At the check in terminal someone did take my info to refund my flight to denver since it was delayed by 5 hours.

The flight was delayed five hours so I had to book a flight with another airliner prior to receiving a refund from frontier. Frontiers phone service is horrible. I coul not get a hold of a person to request a refund or book another flight. And the price of the trip does not include carry on baggage or free seat choice. This wa all extra.

Mon, Feb 5
SFO
DEN
2h 24m
Tue, Feb 13
DEN
SFO
2h 47m
Trip: 9 days
4.9OkayShow reviews
Overall 4.9 Okay
Based on 636 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 from SFO to Denver was canceled and I missed this flight. Had to pay more money for a mnother flight.

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
Okay 5.3

The Frontier app is easy to use

Uncomfortable seats. Expensive luggage- check in and carry on prices are the same and both high.

SFO
DEN
Mediocre 2.0

Flight crew were rude.

SFO
DEN
Excellent 8.0

Quick boarding / deplaning

You have to PAY for a CARRY ON. That's just deceptive so I recommend doing the math when you book your next flight and go for other airlines even if their price is slightly higher than Frontier.

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San Francisco to Denver International Flight Information

Avg. Flight Duration 2h 42m
Flights Arrive in Denver International
Flights Depart from San Francisco
Flight Price $96
Distance 965 miles
Airlines Frontier