Cheap flights from Denver International to San Francisco International

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Flight deals from Denver International to San Francisco International

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

When is the cheapest time 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 May.

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$97
Cheapest month to flyMay
Average flight time2 hrs, 46 mins
Most popular airlineUnited
Average flights per week418

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

The best price we found for a round-trip flight from Denver International to San Francisco International is $97. 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.
2 hours and 46 minutes is the average flight time from Denver International to San Francisco International.
United, Southwest Airlines and Air Canada fly direct from Denver International to San Francisco International.
There are 418 flights per week flying from Denver International to San Francisco International, as of May 2025.
The cheapest month to fly from Denver International to San Francisco International is usually May 2025.
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 Thursday, May 22, 2025.
Yes – the average flight time is 2 hours and 46 minutes.
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.
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.
Currently, Frontier Airlines offers the cheapest flight tickets to San Francisco International.

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

  • Book a direct flight from Denver International Airport to San Francisco International Airport and you'll be in the air for an average of 2 hours 45 minutes.

  • The timezone in San Francisco is UTC-7, which is one hour behind Denver.

  • Flights from DEN to SFO start at 05:01 — the earliest with Frontier Airlines. The latest departure is at 22:55 with Southwest Airlines. In total, you can choose from 128 weekly Denver International Airport to San Francisco International Airport flights.

  • Your DEN to SFO flight won't wait if you're running late, so get to the airport on time. Arrive up to one hour in advance for domestic flights and two hours ahead when you're traveling internationally.

  • You'll likely experience bigger queues during popular months like July. Arriving up to four hours in advance for international flights and two hours for a domestic departure will give you ample time for security and boarding.

  • You'll find a range of airlines operating direct flights from Denver International Airport to San Francisco International Airport. When you're ready to kick off your San Francisco vacation, let one of these carriers take you to this exciting corner of United States:

  • Frontier Airlines is the most frequently booked airline on this route.

  • United Airlines is the most punctual carrier offering DEN to SFO flights, with 75.67% of its services arriving on schedule.

  • We make it a cinch to book a flight with a stopover. To see all your options for tickets from Denver International Airport to San Francisco International Airport, uncheck 'Direct flights only.' Then, pick a flight offering a stop long enough to explore the city of your choice. Some great stopovers between DEN and SFO include:

    • Harry Reid Airport (formerly McCarran Airport)

    • Montrose Regional Airport

    • Salt Lake City International Airport

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

  • At the moment, $40 is the lowest price we've seen for a one-way Denver International Airport to San Francisco International Airport flight. The best price for a return plane ticket is $97. Keep in mind that fares could change due to availability at the time of booking.

  • Book six months before your departure date. After crunching the numbers on our calendar, this is how far you'll want to book ahead to secure cheap tickets from DEN to SFO.

  • Plan your trip for May. That's the cheapest month for flights from Denver International Airport to San Francisco International Airport. If you're flexible with your travel dates, try out the 'Whole month' tool to see the cheapest airfare across every month.

  • Getting your hands on cheap flights from DEN to SFO is a cinch with Price Alerts. All you need to do is create one of these automatic alerts and we'll get in touch when a lower fare pops up.

  • Choose your preferred arrival and departure times, number of stops and airlines with the filters. Or sort your results by 'Cheapest' to see the best deals on flights from Denver International Airport to San Francisco International Airport.

Handy information about Denver International Airport (DEN)

  • DEN's address is 8500 Pena Boulevard.

  • Denver International Airport has an excellent on-time record, making delays less likely. Departures from DEN make it to their destination as scheduled 80.23% of the time.

  • Denver International Airport is around 40 kilometers from central Denver. If you're driving, ride-sharing or catching a cab from the center, it'll take you 35 minutes or so to arrive, depending on the traffic.

  • Catching public transport? Expect a journey time of around 1 hour 30 minutes.

  • Searching for a place to stay before your flight from Denver International Airport to San Francisco International Airport? Check out Baymont by Wyndham Denver International Airport. Enjoy a good night's sleep here before heading to DEN.

Arriving at San Francisco International Airport (SFO)

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

  • San Francisco International Airport to central San Francisco has a drive time of about 20 minutes. It's approximately 21 kilometers away.

  • If you're traveling by public transport, expect a journey time of roughly 45 minutes.

When to fly to San Francisco International Airport (SFO)

  • August is the busiest month for flights from Denver International Airport to San Francisco International Airport. To escape the crowds, travel to San Francisco in February.

  • Lock in your flight from Denver International Airport to San Francisco International Airport for September if you want to go to San Francisco during its warmest month. You can expect temperatures of between 12ºC (54ºF) and 22ºC (72ºF).

  • Search for cheap tickets from DEN to SFO in January if you like cooler conditions. Temperatures are at their lowest then, ranging between 6ºC (43ºF) and 16ºC (61ºF) on average.

Explore more of United States

  • San Jose is just one of the many cities in United States waiting to be explored once you've taken in the sights of San Francisco. Around 64 kilometers away to the south-east, top sights here include Winchester Mystery House, Rosicrucian Egyptian Museum and San Jose Museum of Art.

  • Around 257 kilometers south-east of San Francisco, Fresno is another essential stop in United States. Experience this destination's highlights firsthand at Forestiere Underground Gardens, Fresno Chaffee Zoo and Shinzen Japanese Garden.

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.