Cheap Flights from Denver International to San Francisco International

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Compare Denver International to San Francisco International flight deals

Find the cheapest month or even day of the year to fly to San Francisco International

Book the best San Francisco International fare with no extra fees

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Flight deals from Denver International to San Francisco International

Looking for a cheap last-minute deal or the best return flight from Denver International Airport to San Francisco International Airport? If you want to travel next month, return fares start from $67. Find the lowest prices on one-way and return tickets right here.

San Francisco.$67 per passenger.Departing Sat, 24 Oct, returning Tue, 27 Oct.Return flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from Denver International on Sat, 24 Oct, arriving in San Francisco International.Inbound direct flight with Frontier Airlines departs from San Francisco International on Tue, 27 Oct, arriving in Denver International.Price includes taxes and charges.From $67, select.

San Francisco.$67 per passenger.Departing Mon, 16 Nov, returning Tue, 8 Dec.Return flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from Denver International on Mon, 16 Nov, arriving in San Francisco International.Inbound direct flight with Frontier Airlines departs from San Francisco International on Tue, 8 Dec, arriving in Denver International.Price includes taxes and charges.From $67, select.

San Francisco.$67 per passenger.Departing Sat, 14 Nov, returning Mon, 16 Nov.Return flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from Denver International on Sat, 14 Nov, arriving in San Francisco International.Inbound direct flight with Frontier Airlines departs from San Francisco International on Mon, 16 Nov, arriving in Denver International.Price includes taxes and charges.From $67, select.

San Francisco.$67 per passenger.Departing Thu, 29 Oct, returning Wed, 4 Nov.Return flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from Denver International on Thu, 29 Oct, arriving in San Francisco International.Inbound direct flight with Frontier Airlines departs from San Francisco International on Wed, 4 Nov, arriving in Denver International.Price includes taxes and charges.From $67, select.

San Francisco.$136 per passenger.Departing Wed, 9 Dec, returning Wed, 16 Dec.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Denver International on Wed, 9 Dec, arriving in San Francisco International.Inbound indirect flight with Frontier Airlines, departs from San Francisco International on Wed, 16 Dec, arriving in Denver International.Price includes taxes and charges.From $136, select.

San Francisco.$146 per passenger.Departing Wed, 9 Dec, returning Sat, 12 Dec.Return flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from Denver International on Wed, 9 Dec, arriving in San Francisco International.Inbound direct flight with Frontier Airlines departs from San Francisco International on Sat, 12 Dec, arriving in Denver International.Price includes taxes and charges.From $146, select.

San Francisco.$214 per passenger.Departing Thu, 14 Jan, returning Tue, 19 Jan.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Denver International on Thu, 14 Jan, arriving in San Francisco International.Inbound indirect flight with Frontier Airlines, departs from San Francisco International on Tue, 19 Jan, arriving in Denver International.Price includes taxes and charges.From $214, select.

San Francisco.$223 per passenger.Departing Mon, 1 Feb, returning Sat, 6 Feb.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Denver International on Mon, 1 Feb, arriving in San Francisco International.Inbound indirect flight with Frontier Airlines, departs from San Francisco International on Sat, 6 Feb, arriving in Denver International.Price includes taxes and charges.From $223, select.

San Francisco.$225 per passenger.Departing Thu, 21 Jan, returning Mon, 25 Jan.Return flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from Denver International on Thu, 21 Jan, arriving in San Francisco International.Inbound direct flight with Frontier Airlines departs from San Francisco International on Mon, 25 Jan, arriving in Denver International.Price includes taxes and charges.From $225, select.

San Francisco.$240 per passenger.Departing Thu, 24 Dec, returning Mon, 11 Jan.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Denver International on Thu, 24 Dec, arriving in San Francisco International.Inbound indirect flight with Frontier Airlines, departs from San Francisco International on Mon, 11 Jan, arriving in Denver International.Price includes taxes and charges.From $240, select.

San Francisco.$242 per passenger.Departing Sat, 12 Dec, returning Sat, 9 Jan.Return flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from Denver International on Sat, 12 Dec, arriving in San Francisco International.Inbound direct flight with Frontier Airlines departs from San Francisco International on Sat, 9 Jan, arriving in Denver International.Price includes taxes and charges.From $242, select.

San Francisco.$381 per passenger.Departing Thu, 11 Feb, returning Mon, 15 Feb.Return flight with United.Outbound direct flight with United departs from Denver International on Thu, 11 Feb, arriving in San Francisco International.Inbound direct flight with United departs from San Francisco International on Mon, 15 Feb, arriving in Denver International.Price includes taxes and charges.From $381, select.

San Francisco.$382 per passenger.Departing Thu, 28 Jan, returning Thu, 4 Feb.Return flight with United.Outbound direct flight with United departs from Denver International on Thu, 28 Jan, arriving in San Francisco International.Inbound direct flight with United departs from San Francisco International on Thu, 4 Feb, arriving in Denver International.Price includes taxes and charges.From $382, select.

San Francisco.$489 per passenger.Departing Fri, 12 Mar, returning Fri, 26 Mar.Return flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from Denver International on Fri, 12 Mar, arriving in San Francisco International.Inbound direct flight with Frontier Airlines departs from San Francisco International on Fri, 26 Mar, arriving in Denver International.Price includes taxes and charges.From $489, select.

San Francisco.$583 per passenger.Departing Fri, 26 Feb, returning Fri, 12 Mar.Return flight with United.Outbound direct flight with United departs from Denver International on Fri, 26 Feb, arriving in San Francisco International.Inbound direct flight with United departs from San Francisco International on Fri, 12 Mar, arriving in Denver International.Price includes taxes and charges.From $583, select.

San Francisco.$646 per passenger.Departing Wed, 23 Jun, returning Tue, 29 Jun.Return flight with United.Outbound direct flight with United departs from Denver International on Wed, 23 Jun, arriving in San Francisco International.Inbound direct flight with United departs from San Francisco International on Tue, 29 Jun, arriving in Denver International.Price includes taxes and charges.From $646, select.

Find the cheapest month to fly from Denver International 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 International to San Francisco International flights are currently cheapest in October.

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Direct flights from Denver International to San Francisco International

Denver International to San Francisco International: Alternative routes

Compare routes from Denver International 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	$67
Cheapest month to fly	October
Average flight time	2 hrs, 50 mins
Most popular airline	Southwest Airlines
Average flights per week	446

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

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

The best price we found for a return flight from Denver International to San Francisco International is $67. 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 International to San Francisco International?

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

Which airlines fly direct from Denver International to San Francisco International?

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

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

As of October 2026, there are 446 flights per week flying from Denver International to San Francisco International.

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

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

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

After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Denver International Airport to San Francisco International Airport on Saturday, 24 October 2026.

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

Currently, Frontier Airlines offers the cheapest flight tickets to San Francisco International.

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

The average time for a direct flight from Denver International Airport to San Francisco International Airport is 2 hours 45 minutes.
The timezone in San Francisco is UTC-8, which is one hour behind Denver.
Each week, there are 85 Denver International Airport to San Francisco International Airport flights. If you want to be on board as early as possible, go for the 05:00 United Airlines flight. If you'd rather make the most of your time before flying, the last departure is at 22:50 with Southwest Airlines.
Give yourself plenty of time to make your DEN to SFO flight. As a rule of thumb, arrive two hours before international departures and an hour ahead for domestic flights.
Travelling during a peak month such as July? School holidays and other popular seasons can result in longer lines at security. Be extra cautious and arrive up to four hours ahead of international flights and two hours before a domestic departure.
With direct flights from Denver International Airport to San Francisco International Airport operated by a number of airlines, getting to San Francisco (and then other parts of the United States) is easy. You can travel nonstop with these carriers:
Most passengers choose to fly with United on this route.
With 76.7% of services landing on schedule, Frontier Airlines is the most punctual carrier offering DEN to SFO flights.
If you'd like to add a stop to your trip, just uncheck 'Direct flights only' when searching for your ticket from Denver International Airport to San Francisco International Airport. These are the most popular stopovers between DEN and SFO:
- Harry Reid International Airport
- Salt Lake City Airport
- Montrose Airport

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

Currently, $33 is the cheapest price we've found for a one-way Denver International Airport to San Francisco International Airport flight. The best price for a return plane ticket is $67. Remember that fares can change due to availability when booking.
It's usually best to book in advance if you're hoping to get cheap tickets from DEN to SFO. That's because airlines change prices based on demand, which tends to rise closer to departure.
May is the cheapest month for flights from Denver International Airport to San Francisco International Airport. If you're looking to fly at a different time of year, the 'Whole month' tool will give you the lowest airfares for every month.
Stay on top of deals for cheap flights from DEN to SFO by setting up a Price Alert. We'll send you an email or push notification on the app when fares go down.
Tailor your flights using filters. Pick your departure and arrival times, airlines and total journey duration. You can also sort results by 'Best,' 'Cheapest' or 'Fastest' flights from Denver International Airport to San Francisco International Airport.

Handy information about Denver International Airport (DEN)

You'll find DEN at 8500 Pena Boulevard.
Denver International Airport maintains a solid on-time performance, making delays less likely. Departures from DEN land at their destination as scheduled 80% of the time.
Central Denver to Denver International Airport is approximately 40 kilometres. Depending on traffic, it'll take about 35 minutes to get there if you're ride-sharing, catching a taxi or driving.
Planning to take public transport? You can expect a journey time of around 35 minutes.
Booking a night at a hotel can take the stress out of getting to the airport on time. If you want somewhere to stay before your flight from Denver International Airport to San Francisco International Airport, check out Baymont by Wyndham Denver International Airport. It's a short drive from DEN.

Arriving at San Francisco International Airport (SFO)

Book a hotel close to SFO if you're on a late Denver International Airport to San Francisco International Airport flight. Choose one of these accommodation options and skip the long transfer:
Explore without limits with a San Francisco International Airport rental car. Book your wheels from Dollar, Thrifty or Hertz and find adventure across San Francisco and beyond.
Lock in the best rate by reserving your vehicle from San Francisco International Airport about one week before your departure date.

When to fly to San Francisco International Airport (SFO)

It's time to choose your dates for your flight from Denver International Airport to San Francisco International Airport. July is the most popular month to head to San Francisco. If you want a more laid-back vibe, go in March.
The warmest month in San Francisco is September, with temperatures ranging between 12ºC and 24ºC. Book your flights from Denver International Airport to San Francisco International Airport in this month if this is the type of weather you like.
If you like travelling in cooler conditions, search for a cheap ticket from DEN to SFO in January. Average temperatures are between 5ºC and 16ºC then.

Explore more of the United States

San Jose is just one of the many places in the United States waiting to be discovered once you've seen the sights of San Francisco. Around 64 kilometres away to the south-east, check out popular attractions including Winchester Mystery House, The Tech Interactive and Santa Clara Valley.
Fresno is another standout destination in the United States and is around 257 kilometres south-east of San Francisco. No journey is complete without seeing Forestiere Underground Gardens, Shinzen Japanese Garden and Fresno Chaffee Zoo.