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$78+ Cheap flights from Denver to San Francisco (DEN - SFO)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/14. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — SFO
Oct 19 — Oct 261
Sun 10/19
Sun 10/26
1 adult, Economy
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Cheapflights Tip: The best prices from Denver Intl to San Francisco are usually found in February or January, booked 81 days in advance, depart on a Friday or Thursday and return on a Friday

Cheap flight deals from Denver to San Francisco

Discover tips and strategies to find the most affordable flight options for your journey from Denver (DEN) to San Francisco (SFO). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated September 19, 2025.

Round-trip from

$106
(CheapOair)

One-way from

$78
(Frontier)

Popular in

July

Cheapest in

February

Average price

$217

Good round-trip deal

$186 or less

Good one-way deal

$116 or less
From Denver Intl to San Francisco
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One-way flight from Denver Intl to San Francisco
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Highest demand for flights based on searches. 16% potential increase in price ($42 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($7 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Price to beat on a round-trip flight from Denver Intl to San Francisco.
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Price to beat on a one-way flight from Denver Intl to San Francisco.
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Find flight deals from Denver to San Francisco

Cheapest flights from Denver to San Francisco
Explore the most affordable flight options available from Denver to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 19, 2025.

This CheapOair deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/258:41 pmDEN - SFO
Nonstop2h 48mFrontier
Wed 10/296:34 amSFO - DEN
Nonstop2h 44mFrontier
Deal found 9/16$106
This Cheapflightsfares deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/158:39 pmDEN - SFO
Nonstop2h 48mFrontier
Wed 10/226:34 amSFO - DEN
Nonstop2h 44mFrontier
Deal found 9/16$108
This Cheapflightsfares deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/39:21 amDEN - SFO
1 stop8h 22mFrontier
Sat 11/86:34 amSFO - DEN
Nonstop2h 44mFrontier
Deal found 9/15$109
This CheapOair deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/66:00 amDEN - SFO
1 stop12h 48mFrontier
Mon 11/106:34 amSFO - DEN
Nonstop2h 44mFrontier
Deal found 9/16$110
This Cheapflightsfares deal was found by Cheapflights users on 9/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/238:41 pmDEN - SFO
Nonstop2h 49mFrontier
Tue 9/307:10 amSFO - DEN
Nonstop2h 37mFrontier
Deal found 9/17$111
This Cheapflightsfares deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/36:30 amDEN - SFO
Nonstop2h 45mFrontier
Wed 10/86:34 amSFO - DEN
Nonstop2h 44mFrontier
Deal found 9/16$112
This Cheapflightsfares deal was found by Cheapflights users on 9/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/84:56 pmDEN - SFO
Nonstop2h 49mFrontier
Tue 11/118:02 amSFO - DEN
Nonstop2h 43mFrontier
Deal found 9/17$113
This Kiwi.com deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/78:39 pmDEN - SFO
Nonstop2h 48mFrontier
Sat 10/116:44 amSFO - DEN
Nonstop2h 44mFrontier
Deal found 9/16$115
This Cheapflightsfares deal was found by Cheapflights users on 9/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/27:45 amDEN - SFO
Nonstop2h 48mFrontier
Mon 11/33:25 pmSFO - DEN
Nonstop2h 43mFrontier
Deal found 9/18$116
This CheapOair deal was found by Cheapflights users on 9/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/307:45 amDEN - SFO
Nonstop2h 48mFrontier
Sun 11/28:09 pmSFO - DEN
Nonstop2h 41mFrontier
Deal found 9/18$117

Cheapflights Fare Finder

 
Customize your flight search to find flights from Denver to San Francisco that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated September 19, 2025.
Use the filters below to find and compare flights from Denver to San Francisco that are best for you.

Fly from

Denver

Fly to

San Francisco

Route

Depart

Return

Price

DenverSan Francisco

DEN - SFO

DENSFO

Denver Intl

Sat 11/1

8:00 am-12:49 pm

1 stop5h 49m

San Francisco

Sat 11/8

6:34 am-10:18 am

Nonstop2h 44m

$121

DenverSan Francisco

DEN - SFO

DENSFO

Denver Intl

Thu 12/11

6:59 pm-8:06 am

1 stop14h 07m

San Francisco

Mon 12/15

9:57 pm-7:24 pm

1 stop20h 27m

$142

DenverSan Francisco

DEN - SFO

DENSFO

Denver Intl

Sat 10/18

2:10 pm-3:45 pm

Nonstop2h 35m

San Francisco

Mon 10/20

6:20 pm-9:45 pm

Nonstop2h 25m

$157

DenverSan Francisco

DEN - SFO

DENSFO

Denver Intl

Tue 10/21

8:00 am-9:40 am

Nonstop2h 40m

San Francisco

Tue 10/21

12:30 pm-3:55 pm

Nonstop2h 25m

$157

DenverSan Francisco

DEN - SFO

DENSFO

Denver Intl

Thu 12/11

6:59 pm-11:48 pm

1 stop5h 49m

San Francisco

Mon 12/15

6:13 pm-11:59 pm

1 stop4h 46m

$165

DenverSan Francisco

DEN - SFO

DENSFO

Denver Intl

Thu 11/27

3:00 pm-4:40 pm

Nonstop2h 40m

San Francisco

Tue 12/2

5:30 am-1:15 pm

1 stop6h 45m

$167

DenverSan Francisco

DEN - SFO

DENSFO

Denver Intl

Wed 10/15

5:50 am-12:20 pm

2 stops7h 30m

San Francisco

Wed 10/22

5:45 am-9:10 am

Nonstop2h 25m

$172

DenverSan Francisco

DEN - SFO

DENSFO

Denver Intl

Sat 11/15

1:25 pm-3:16 pm

Nonstop2h 51m

$79

DenverSan Francisco

DEN - SFO

DENSFO

Denver Intl

Sat 11/22

10:45 pm-12:30 am

Nonstop2h 45m

$79

DenverSan Francisco

DEN - SFO

DENSFO

Denver Intl

Sat 10/11

8:00 am-9:42 am

Nonstop2h 42m

$79

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/16

Showing 1-10 of 19 results
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The best insider tips for Denver to San Francisco flights

Snippets provided in this section are AI-generated based on a summarization of Cheapflights-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
Cheapflights partnered with top experts to bring you the best recommendations for your Denver to San Francisco trip
Airlines
Frontier

Frontier's UpFront Plus offers a guaranteed empty middle seat for added comfort.


Frontier's Zone 1 boarding is available with a carry-on purchase or special fare bundle.

Read more about Frontierby Marisa Garcia
United Airlines

United's Economy Plus offers extra legroom seats towards the front of the economy cabin.


United's Polaris Lounges offer showers, napping areas, and dining for premium passengers.

Read more about United Airlinesby Harriet Baskas
Airports
DEN

Use the A Line train for a quick 37-minute ride from downtown Denver to DEN, avoiding traffic and parking hassles.

Read more about DENby Emily Zemler
SFO

Take BART from SFO to downtown San Francisco in about 40 minutes for an affordable and efficient transit option.

Read more about SFOby Harriet Baskas
Our travel experts
Marisa Garcia

Marisa Garcia

Expert on Frontier

Marisa Garcia

Marisa Garcia

Marisa knows planes inside and out, spending 16 years working on aircraft in hangars at airports around the world. She is an aviation industry expert, specialized in airline interiors and regulations. Ten years ago, she pivoted to journalism. She shares her insights in leading aviation, travel, and business publications and on her site FlightChic.

Read more
Harriet Baskas

Harriet Baskas

Expert on United Airlines and SFO

Harriet Baskas

Harriet Baskas

Harriet is an award-winning journalist who is happiest in an airport or an unusual museum. Her stories about airports, air travel, and the business of travel have appeared on NBC News, CNBC, USA TODAY, The Points Guy and other outlets. She is the creator of the StuckatTheAirport.com blog and the author of nine books. When not out on the road or exploring the latest airport amenities, she’s home in Seattle getting ready for the next adventure.

Read more
Emily Zemler

Emily Zemler

Expert on DEN

Emily Zemler

Emily Zemler

Emily is a freelance writer and book author based in London covering entertainment and travel. Her work has appeared in Los Angeles Times, Observer, and Conde Nast Traveler She has ventured to more than 40 countries and all seven continents, always in search of a great art museum. She has written extensively about hotels, luxury travel, and aviation.

Read more

Best time to book a flight from Denver to San Francisco

Have a flexible travel schedule? Discover the best time to fly to San Francisco from Denver with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Denver to San Francisco

How far ahead should I book a flight from Denver to San Francisco?

Use this chart to determine the optimal time to book a round-trip flight from Denver to San Francisco. Price data was last updated on September 12, 2025.

The best time to book flights from Denver to San Francisco is 81 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from Denver to San Francisco?

Currently, January is the cheapest month in which you can book a flight from Denver to San Francisco (average of $276). Flying from Denver to San Francisco in June is currently the most expensive (average of $357). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from DEN to SFO?

Find hourly flight availability from Denver to San Francisco. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 19, 2025.

It’s optimal to fly from Denver to San Francisco at noon. By choosing this option you can save up to 27% on the cost of your flight, compared to a flight in the morning.

What is the cheapest day to fly from Denver to San Francisco?

Use this chart to determine the cheapest time to fly round-trip from Denver to San Francisco. Price data was last updated on September 14, 2025.

Travelers seeking maximum savings on their Denver to San Francisco flight should consider departing on Friday evenings when fares are most often at their lowest. Saturday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

How much does it cost to fly round-trip from Denver to San Francisco?

Reviews of airlines servicing San Francisco

Get insights into the airlines that provide service to San Francisco. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to San Francisco. Reviews last updated September 19, 2025.
See what other customers who have flown with Southwest, United Airlines, and Frontier from Denver to San Francisco have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,242 reviews

Entertainment

7.5

Comfort

8.0

Overall

8.0

Boarding

8.1

Crew

8.6

Food

7.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Southwest
8.0
Very good
4,242 reviews
Southwest
8.0
Very good
4,242 reviews

Entertainment

7.5

Comfort

8.0

Overall

8.0

Boarding

8.1

Crew

8.6

Food

7.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
United Airlines
7.4
Good
8,926 reviews
Southwest
8.0
Very good
4,242 reviews

Entertainment

7.5

Comfort

8.0

Overall

8.0

Boarding

8.1

Crew

8.6

Food

7.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Frontier
5.8
Fair
3,171 reviews
Southwest
8.0
Very good
4,242 reviews

Entertainment

7.5

Comfort

8.0

Overall

8.0

Boarding

8.1

Crew

8.6

Food

7.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.

Related info for your journey

Find useful and relevant information for your journey from Denver to San Francisco. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airports do I use to fly from Denver to San Francisco?

    If you book a flight from Denver to San Francisco, you will be flying from Denver Intl to San Francisco. Flights to San Francisco (SFO) from Denver Intl (DEN) take 2h 39m for a nonstop flight. There are 43 flights from Denver Intl to San Francisco per day from 3 airlines.

  • How popular is this Denver to San Francisco flight route?

    The Denver Intl to San Francisco flight path was viewed by 113 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

  • How long is the flight from Denver to San Francisco?

    Frontier, Alaska Airlines, and Southwest can get you from Denver to San Francisco in just under 2h 35m. Your travel time can differ by up to 11h 32m. The distance from Denver to San Francisco is about 964 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines flying from Denver to San Francisco round-trip?

    Currently priced at $58, Frontier will fly you from Denver to San Francisco and back. In addition to Frontier, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Southwest and United Airlines - these airlines can fly you to your destination from $141 and $161, respectively. Users have found that Frontier is 73% cheaper than the other options available to this destination.

  • What are the most reliable airlines from Denver to San Francisco?

    The top 3 most reliable airlines when flying from Denver to San Francisco are Emirates (87%), Air China (82%) and ANA (77%).

  • What are the cheapest flights from Denver to San Francisco?

    Looking for the cheapest flight from Denver to San Francisco? While on average our users pay $787, our data indicates the cheapest price to be $63. The most popular route (Denver Intl - San Francisco), is priced around $113.

  • Can I find deals for flights from Denver to San Francisco that include hotel bookings?

    Yes. In addition to deals on Denver to San Francisco flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Denver to San Francisco?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Denver to San Francisco.

  • Can I find deals for business class flights from Denver to San Francisco?

    Yes. Cheapflights offers flight deals from Denver to San Francisco by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Denver to San Francisco?

    Currently, January is the cheapest month in which you can book a flight from Denver to San Francisco (average of $276). Flying from Denver to San Francisco in June is currently the most expensive (average of $357). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near San Francisco?

Book flights to San Francisco if you plan to visit one of these locations
Roseville
Santa Cruz
Livermore
South San Francisco
Turlock
Antioch
Watsonville
Santa Clara
Manteca
Sunnyvale
Hollister
Vacaville
Foster City
Union City
Vallejo
Burlingame
Redwood City
San Mateo
San Leandro
Lathrop

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Top 3 airlines flying from Denver to San Francisco

Discover the top 3 airlines that operate flights from Denver to San Francisco. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated September 19, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$58Average$164FlexibilityNo cancel feeOn-time62%
SouthwestCheapest$141Average$255FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$161Average$322FlexibilityNo cancel feeOn-time69%

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