$83 Cheap Flights from Denver to San Francisco International in 2025

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Flight deals from Denver to San Francisco International

Looking for a cheap last-minute deal or the best return flight from Denver to San Francisco International? Find the lowest prices on one-way and return tickets right here.

San Francisco.$83 per passenger.Departing Thu, 1 May, returning Wed, 7 May.Return flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from Denver International on Thu, 1 May, arriving in San Francisco International.Inbound direct flight with Frontier Airlines departs from San Francisco International on Wed, 7 May, arriving in Denver International.Price includes taxes and charges.From $83, select.

San Francisco.$99 per passenger.Departing Mon, 21 Apr, returning Wed, 23 Apr.Return flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from Denver International on Mon, 21 Apr, arriving in San Francisco International.Inbound direct flight with Frontier Airlines departs from San Francisco International on Wed, 23 Apr, arriving in Denver International.Price includes taxes and charges.From $99, select.

San Francisco.$99 per passenger.Departing Tue, 22 Apr, returning Thu, 1 May.Return flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from Denver International on Tue, 22 Apr, arriving in San Francisco International.Inbound direct flight with Frontier Airlines departs from San Francisco International on Thu, 1 May, arriving in Denver International.Price includes taxes and charges.From $99, select.

San Francisco.$119 per passenger.Departing Wed, 26 Mar, returning Tue, 1 Apr.Return flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from Denver International on Wed, 26 Mar, arriving in San Francisco International.Inbound direct flight with Frontier Airlines departs from San Francisco International on Tue, 1 Apr, arriving in Denver International.Price includes taxes and charges.From $119, select.

San Francisco.$172 per passenger.Departing Tue, 4 Mar, returning Tue, 11 Mar.Return flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from Denver International on Tue, 4 Mar, arriving in San Francisco International.Inbound direct flight with Frontier Airlines departs from San Francisco International on Tue, 11 Mar, arriving in Denver International.Price includes taxes and charges.From $172, select.

San Francisco.$219 per passenger.Departing Wed, 11 Jun, returning Sat, 14 Jun.Return flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from Denver International on Wed, 11 Jun, arriving in San Francisco International.Inbound direct flight with Frontier Airlines departs from San Francisco International on Sat, 14 Jun, arriving in Denver International.Price includes taxes and charges.From $219, select.

San Francisco.$219 per passenger.Departing Tue, 24 Jun, returning Tue, 1 Jul.Return flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from Denver International on Tue, 24 Jun, arriving in San Francisco International.Inbound direct flight with Frontier Airlines departs from San Francisco International on Tue, 1 Jul, arriving in Denver International.Price includes taxes and charges.From $219, select.

San Francisco.$234 per passenger.Departing Wed, 28 May, returning Sun, 1 Jun.Return flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from Denver International on Wed, 28 May, arriving in San Francisco International.Inbound direct flight with Frontier Airlines departs from San Francisco International on Sun, 1 Jun, arriving in Denver International.Price includes taxes and charges.From $234, select.

Find the cheapest month to fly from Denver to San Francisco International

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Denver to San Francisco International flights are currently cheapest in May.

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Direct flights from Denver to San Francisco International

Denver to San Francisco International: Alternative routes

Compare routes from Denver to San Francisco below. You may find an airport to fly into that's cheaper, faster, or easier than San Francisco International.

Denver to San Francisco: Flight information

The things to know before you go.

Cheapest flight found	$83
Cheapest month to fly	May
Average flight time	2 hrs, 50 mins
Most popular airline	Southwest Airlines
Average flights per week	421

Finding cheap flights from Denver to San Francisco International: Frequently asked questions

How much are return flights from Denver to San Francisco International?

The best price we found for a return flight from Denver to San Francisco International is $83. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.

How long does it take to fly from Denver to San Francisco International?

2 hours and 50 minutes is the average flight time from Denver to San Francisco International.

Which airlines fly direct from Denver to San Francisco International?

Southwest Airlines, United and Air Canada fly direct from Denver to San Francisco International.

How many flights are there a week from Denver to San Francisco International?

As of February 2025, there are 436 flights per week flying from Denver to San Francisco International.

When is the cheapest time to fly from Denver to San Francisco International?

The cheapest month to fly from Denver to San Francisco International is usually February 2025.

Which upcoming date is cheapest to fly from Denver to San Francisco International Airport on?

After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from Denver to San Francisco International Airport on Thursday, 1 May 2025.

Can I get a direct flight from Denver to San Francisco International Airport?

Yes – the average flight time is 2 hours and 50 minutes.

How can I find the best flight deal to San Francisco International?

We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to San Francisco International but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.

When is the best time to book flights to San Francisco?

We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to San Francisco is around 40 days in advance, so don’t leave your flight to the last minute.

Which is the cheapest airline to fly from Denver to San Francisco International with?

The cheapest airline that flies to San Francisco International is Frontier Airlines .

Travelling from Denver to San Francisco International Airport (SFO): what you need to know

Denver's main airport is Denver International Airport (DEN). Explore your options for flying out of this base when searching for flights from Denver to San Francisco International Airport (SFO).
Hop on a direct flight from Denver to San Francisco International Airport and you'll be in the air for around 2 hours 43 minutes.
San Francisco International Airport is located in San Francisco. The city operates in the UTC-7 timezone and is 1 hour behind Denver.
Denver International Airport (DEN) to San Francisco International Airport (SFO) is the most popular route. There are 128 direct weekly flights to choose from. If you prefer a later start to the day, hop on the last flight with Southwest Airlines at 22:55. Go for the first DEN to SFO departure operated by Frontier Airlines at 05:01 if you want to get going earlier.
Arriving two hours before an international flight and one hour ahead of a domestic departure are golden rules for hassle-free flying. Be at the airport with enough time to catch your flight from Denver to SFO.
Travelling during a peak month like July? High seasons (like summer, Christmas/New Year and spring break) can add another hour at check-in and security. Play things extra safe and arrive up to four hours before international flights and two hours before domestic departures.

Airports in Denver

Denver International Airport (DEN)

Denver International Airport (DEN) will have you travelling directly to your destination. Nonstop flights from Denver to San Francisco International Airport (SFO) operate out of this terminal.
At DEN, there's a good selection of airlines offering direct flights from Denver to San Francisco International Airport, including:
The distance from central Denver to DEN is around 40 kilometres. Check out travel apps like Google Maps for the best route, whether you want to drive or use public transport.
Get your flight from Denver to San Francisco International Airport off to a relaxed start. Only a short drive from Denver International Airport, stay at SpringHill Suites Denver Airport and be well-rested for the journey ahead.

About San Francisco International Airport (SFO)

Book a hotel near SFO if you're catching a late flight from Denver to San Francisco International Airport. Choose one of these options and avoid the hassle of a long transfer:

Getting from San Francisco International Airport (SFO) to central San Francisco

From San Francisco International Airport, San Francisco is approximately 21 kilometres away. It takes around 20 minutes to get to the centre driving.
It typically takes 47 minutes if you're travelling on public transport.

How to find the cheapest flights from Denver to San Francisco International Airport (SFO)

The best price we've found for a one-way ticket from Denver to San Francisco International Airport is $51. The cheapest price for a return flight is $83. Remember fares may change due to demand at the time of booking.
To snag flight tickets from Denver to SFO, reserve your trip 8 months ahead of your departure.
The cheapest month for tickets from Denver to San Francisco International Airport is May. Use the 'Whole month' search feature to find the most affordable day to fly if you're flexible with your plans.
Create a Price Alert and track any changes on this route through push notifications or email. You'll know straight away when the fares drop. Good timing makes all the difference when searching for flight tickets from Denver to SFO.
Use the filters to tailor your flights from Denver to San Francisco International Airport. Enter your ideal departure and arrival times, airlines and number of stops. You can also sort your results by 'Cheapest' to find the best deals.

The best time to fly from Denver to San Francisco International Airport (SFO)

February is the quietest time to travel to San Francisco. Alternatively, follow the crowds and take off in August. This is the busiest month for flights from Denver to San Francisco International Airport.
The warmest month in San Francisco is September, with the temperature ranging between 12ºC and 22ºC. Book your flights from Denver to SFO in this month if this is the type of weather you enjoy.
January has average temperatures of between 6ºC and 16ºC. Look for cheap flights from Denver to San Francisco International Airport around that time if you like travelling in cooler conditions.

More about San Francisco

After locking in your flight from Denver to San Francisco International Airport, think about where you'd like to stay in this city. Make one of these options your base for exploring San Francisco:
Golden Gate Bridge and Alcatraz Island are just a couple of the popular attractions to add to your San Francisco to-do list. Keep the momentum going by heading to Lombard Street.

Complete your San Francisco trip with a car rental

Exit all those tabs and let us do the hard work for you. We can also help you find deals on car rentals in San Francisco once you've booked your cheap flight from Denver to San Francisco International Airport. Easily compare prices in one place and drive off with the perfect ride for less.