What airlines fly to Denver?

Frontier, United Airlines and Southwest are the top three most popular airlines that fly to Denver from San Francisco according to our data. Frontier is the first choice among our users, with 48% of people opting to fly with this airline when traveling to Denver. Keep in mind that there are 7 different airlines that fly to Denver on a routine basis, so you have a few additional options to choose from.

What is the cheapest airline that flies from San Francisco to Denver Intl?

Frontier, Southwest, and Hawaiian Airlines are the most popular carriers operating from San Francisco to Denver Intl

How many flights depart from San Francisco to Denver on average per week?

The number of flights available between San Francisco and Denver is 340 per week as of July 2025. The most frequent departure day is Wed, with 18% of weekly flights leaving on this day.

How many flights depart from San Francisco to Denver on average per day?

As of July 2025, there are 48 flights per day flying from San Francisco to Denver. The most common time of day flights depart is 6:00AM, with 40% of flights taking off in the afternoon.

When did momondo last update prices for flights from San Francisco Airport to Denver Intl Airport?

Prices for flights from San Francisco Airport to Denver Intl Airport were last updated today.

How many operators does momondo search for flights from San Francisco Airport to Denver Intl Airport?

As of July 2025, there are 7 operators available to choose from for flights from San Francisco Airport to Denver Intl Airport.

How old do you have to be to fly from San Francisco Airport to Denver Intl Airport?

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from San Francisco Airport to Denver Intl Airport.

What documentation or ID do you need to fly to Denver Intl Airport?

The required travel and health documents for your Denver Intl Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Denver Intl Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$43 Cheap Flights from San Francisco to Denver in 2025

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Find the cheapest flights from San Francisco to Denver

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

6:29 am - 10:08 amSFO-DEN

2h 39mnonstop

8:41 pm - 10:30 pmDEN-SFO

2h 49mnonstop

$92Frontier

Find Deal

Mon, Sep 22 - Wed, Sep 24

10:49 am - 2:30 pmSFO-DEN

2h 41mnonstop

8:41 pm - 10:30 pmDEN-SFO

2h 49mnonstop

$96Frontier

Find Deal

Sat, Sep 27 - Tue, Sep 30

6:50 am - 10:30 amSFO-DEN

2h 40mnonstop

8:45 pm - 10:33 pmDEN-SFO

2h 48mnonstop

$106Frontier

Find Deal

Wed, Aug 20 - Sat, Aug 23

6:37 am - 10:17 amSFO-DEN

2h 40mnonstop

9:36 pm - 11:25 pmDEN-SFO

2h 49mnonstop

$107Frontier

Find Deal

Sat, Aug 9 - Sat, Aug 16

6:00 am - 9:44 amSFO-DEN

2h 44mnonstop

10:29 pm - 12:14 amDEN-SFO

2h 45mnonstop

$111Frontier

Find Deal

Wed, Oct 29 - Thu, Oct 30

6:37 am - 10:17 amSFO-DEN

2h 40mnonstop

9:36 pm - 11:25 pmDEN-SFO

2h 49mnonstop

$112Frontier

Find Deal

Tue, Aug 5 - Tue, Aug 12

6:30 am - 10:10 amSFO-DEN

2h 40mnonstop

1:26 pm - 3:10 pmDEN-SFO

2h 44mnonstop

$133United Airlines

Find Deal

Wed, Aug 6 - Wed, Aug 13

5:15 am - 8:40 amSFO-DEN

2h 25mnonstop

9:35 pm - 11:10 pmDEN-SFO

2h 35mnonstop

$148Southwest

Find Deal

Sat, Aug 23 - Mon, Aug 25

11:21 am - 5:29 pmSFO-DEN

5h 08m1 stop

2:35 pm - 8:01 pmDEN-SFO

6h 26m1 stop

$159American Airlines

Find Deal

Thu, Aug 7 - Mon, Aug 11

5:00 am - 8:35 amSFO-DEN

2h 35mnonstop

11:28 am - 3:01 pmDEN-SFO

4h 33m1 stop

$163United Airlines

Find Deal

Sat, Aug 30 - Tue, Sep 2

Frontier flights from San Francisco to Denver

Our best Frontier deals on San Francisco to Denver flight tickets

Frontier

Sep 22

SFO6:29 amSan Francisco

2h 39m

DEN10:08 amDenver Intl

Sep 24

DEN8:41 pmDenver Intl

2h 49m

SFO10:30 pmSan Francisco

$92

Find similar

Frontier

Sep 27

SFO10:49 amSan Francisco

2h 41m

DEN2:30 pmDenver Intl

Sep 30

DEN8:41 pmDenver Intl

2h 49m

SFO10:30 pmSan Francisco

$96

Find similar

Frontier

Aug 20

SFO6:50 amSan Francisco

2h 40m

DEN10:30 amDenver Intl

Aug 23

DEN8:45 pmDenver Intl

2h 48m

SFO10:33 pmSan Francisco

$106

Find similar

United Airlines flights from San Francisco to Denver

Our best United Airlines deals on San Francisco to Denver flight tickets

United Airlines

Aug 6

SFO6:30 amSan Francisco

2h 40m

DEN10:10 amDenver Intl

Aug 13

DEN1:26 pmDenver Intl

2h 44m

SFO3:10 pmSan Francisco

$133

Find similar

United Airlines

Aug 30

SFO5:00 amSan Francisco

2h 35m

DEN8:35 amDenver Intl

Sep 2

DEN11:28 amDenver Intl

4h 33m

1 stop

SFO3:01 pmSan Francisco

$163

Find similar

How to get the cheapest flight ticket from San Francisco to Denver

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Other information

What is the cheapest month to fly to Denver?

The cheapest month to fly to Denver from San Francisco is in January. Flight prices, which tend to average around $190, are often lower during this time because this is during the off-season. If you don’t want to visit Denver in January, then you should wait until September to fly from San Francisco, when ticket prices are also cheap, with an average price of $195.

What is the cheapest day to depart on your flight to Denver?

The cheapest day to depart on your flight to Denver is on a Friday when prices can be found for as low as $301. This is often the case because there is less demand to fly during this day of the week. The most expensive day to fly to Denver is Sunday, with ticket prices averaging around $375.

What is the cheapest time of day to depart on your flight to Denver?

The cheapest time of day to fly to Denver is in the evening when flights can be purchased for as low as $249. Flights at noon are often more expensive with an average ticket price of $349.

What is the cheapest San Francisco to Denver Intl flight route?

Fly from San Francisco to Denver Intl for the best San Francisco - Denver Intl flight prices

How far in advance should I book a flight to Denver?

You are more likely to see cheaper flights to Denver from San Francisco when booking weeks ahead of your departure date. In general, you can expect to find flights to Denver for around $224 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Denver from San Francisco for as low as $175 on momondo.

What cabin class options are available on San Francisco to Denver Intl flights?

There are 4 cabin classes available to choose from on San Francisco to Denver Intl flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on San Francisco to Denver flights?

You could potentially save up to 8% on your flight if you consider stops on a San Francisco to Denver flight.

How have San Francisco to Denver flight prices changed over time?

As of July 2025, prices for San Francisco to Denver flights are approximately 6% cheaper when compared to flights at the same time last year.

When to book flights from San Francisco to Denver

Are you open to changing your travel dates? Check out the ideal times to fly from San Francisco to Denver according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap San Francisco to Denver (SFO to DEN) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from San Francisco to Denver

Best Price Found	$43
Fastest flight time	2h 25m
Direct flights	Every day
Airports in Denver	1 airport

The best one-way flight to Denver from San Francisco in the past 72 hours is $43. The best round-trip flight deal from San Francisco to Denver found on momondo in the last 72 hours is $92.

The fastest flight from San Francisco to Denver takes 2h 25m

Direct flights go from San Francisco to Denver every day.

There is 1 airport near Denver: Denver Intl (DEN)

Search flight deals

How far is San Francisco to Denver Intl by plane?
The distance between San Francisco and Denver Intl is about 946.3 mi. 2h 25m is a normal flight duration for this route.
When did momondo last update prices for flights from San Francisco Airport to Denver Intl Airport?
Prices for flights from San Francisco Airport to Denver Intl Airport were last updated today.
How many operators does momondo search for flights from San Francisco Airport to Denver Intl Airport?
As of July 2025, there are 7 operators available to choose from for flights from San Francisco Airport to Denver Intl Airport.
How old do you have to be to fly from San Francisco Airport to Denver Intl Airport?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from San Francisco Airport to Denver Intl Airport.
What documentation or ID do you need to fly to Denver Intl Airport?
The required travel and health documents for your Denver Intl Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Denver Intl Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
What is the most popular plane model from San Francisco to Denver?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from San Francisco to Denver is Airbus A321neo (12.59% of total bookings). The next most popular plane models are Boeing 737-800 (11.77%), Boeing 737 MAX 9 (10.98%), and Boeing 737-800 Passenger/BBJ2 (winglets) (9.94%).
What is the most popular airline from San Francisco to Denver?
Based on momondo bookings for this flight route, the most popular airline on flight routes from San Francisco to Denver is Frontier (55% of total bookings). The next most popular airlines are United Airlines (31%), Southwest (13%), and American Airlines (0%).

Best airlines flying from San Francisco to Denver

Compare and see reviews for airlines that fly from San Francisco to Denver with momondo

Airline	Rating	Free Cancellation	Price
Frontier	PriceFrom $59	Free Cancellation	Rating 5.9 3,271 reviews	Search Frontier flights
Allegiant Air	PriceFrom $88	Free Cancellation	Rating 7.2 704 reviews	Search Allegiant Air flights
Alaska Airlines	PriceFrom $116	Free Cancellation	Rating 8.0 10,000 reviews	Search Alaska Airlines flights
Southwest	PriceFrom $157	Free Cancellation	Rating 8.0 4,250 reviews	Search Southwest flights
United Airlines	PriceFrom $158	Free Cancellation	Rating 7.4 8,846 reviews	Search United Airlines flights
American Airlines	PriceFrom $182	Free Cancellation	Rating 7.2 10,000 reviews	Search American Airlines flights
Delta	PriceFrom $196	Free Cancellation	Rating 8.0 7,952 reviews	Search Delta flights

Southwest Flights From San Francisco to Denver
Southwest operates around 31 flights from San Francisco to Denver every week. The average price of these flights found in the last 72 hours has been $277, but momondo users have found Southwest deals from San Francisco to Denver from as low as $157 round-trip. Southwest has been scored 8.0/10 in 4,250 reviews.
United Airlines Flights From San Francisco to Denver
$158 is the best United Airlines flight deal from San Francisco to Denver found on momondo over the last 72 hours. The average United Airlines ticket price found was closer to $335, however, with flight time and availability significantly affecting the price. United Airlines (7.4/10 from 8,846 user reviews) flies into Denver from San Francisco 73 times in an average week so prices can vary.

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Why use momondo?

Why should I use momondo to find a flight deal from San Francisco to Denver?

It is quick and easy to find San Francisco to Denver flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Denver that suits you.

Can I find flights from San Francisco to Denver with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Denver from San Francisco with this policy.

How can momondo help me find flights from San Francisco to Denver?

Once you have performed a search for San Francisco to Denver flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from San Francisco to Denver right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of San Francisco to Denver flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

An easier way to manage your Denver trip

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Cheap flights from San Francisco to Denver from $43

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from San Francisco to Denver departing on 8/26. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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Big names and deals

Filter for what you want

Filter for what you want

Trusted and free

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Find the cheapest flights from San Francisco to Denver

Cheap round-trip flights

Cheap one-way flights

Cheap last minute flights

Cheap direct flights

Frontier flights from San Francisco to Denver

Our best Frontier deals on San Francisco to Denver flight tickets

United Airlines flights from San Francisco to Denver

Our best United Airlines deals on San Francisco to Denver flight tickets

See travel insights to Denver from

How to get the cheapest flight ticket from San Francisco to Denver

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Denver?

What is the cheapest day to depart on your flight to Denver?

The cheapest day to depart on your flight to Denver is on a Friday when prices can be found for as low as $301. This is often the case because there is less demand to fly during this day of the week. The most expensive day to fly to Denver is Sunday, with ticket prices averaging around $375.

What is the cheapest time of day to depart on your flight to Denver?

The cheapest time of day to fly to Denver is in the evening when flights can be purchased for as low as $249. Flights at noon are often more expensive with an average ticket price of $349.

What is the cheapest San Francisco to Denver Intl flight route?

Fly from San Francisco to Denver Intl for the best San Francisco - Denver Intl flight prices

How far in advance should I book a flight to Denver?

What cabin class options are available on San Francisco to Denver Intl flights?

There are 4 cabin classes available to choose from on San Francisco to Denver Intl flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on San Francisco to Denver flights?

You could potentially save up to 8% on your flight if you consider stops on a San Francisco to Denver flight.

How have San Francisco to Denver flight prices changed over time?

As of July 2025, prices for San Francisco to Denver flights are approximately 6% cheaper when compared to flights at the same time last year.

What is the cheapest airline that flies from San Francisco to Denver Intl?

Frontier, Southwest, and Hawaiian Airlines are the most popular carriers operating from San Francisco to Denver Intl

What airlines fly to Denver?

How many flights depart from San Francisco to Denver on average per day?

As of July 2025, there are 48 flights per day flying from San Francisco to Denver. The most common time of day flights depart is 6:00AM, with 40% of flights taking off in the afternoon.

How many flights depart from San Francisco to Denver on average per week?

The number of flights available between San Francisco and Denver is 340 per week as of July 2025. The most frequent departure day is Wed, with 18% of weekly flights leaving on this day.

When to book flights from San Francisco to Denver

Cheap San Francisco to Denver (SFO to DEN) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from San Francisco to Denver

Best Price Found

Fastest flight time

Direct flights

Airports in Denver

How far is San Francisco to Denver Intl by plane?

When did momondo last update prices for flights from San Francisco Airport to Denver Intl Airport?

How many operators does momondo search for flights from San Francisco Airport to Denver Intl Airport?

How old do you have to be to fly from San Francisco Airport to Denver Intl Airport?

What documentation or ID do you need to fly to Denver Intl Airport?

What is the most popular plane model from San Francisco to Denver?

What is the most popular airline from San Francisco to Denver?

Best airlines flying from San Francisco to Denver

Compare and see reviews for airlines that fly from San Francisco to Denver with momondo

Southwest Flights From San Francisco to Denver

United Airlines Flights From San Francisco to Denver

Traveling to a place near Denver?

Why use momondo?

Why should I use momondo to find a flight deal from San Francisco to Denver?

Can I find flights from San Francisco to Denver with flexible booking policies on momondo?

How can momondo help me find flights from San Francisco to Denver?

I’m not ready to book a flight from San Francisco to Denver right now. Can momondo alert me if prices change?

An easier way to manage your Denver trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to the United States

Airports servicing Colorado