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Cheap flights from San Francisco to Denver from £56

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 31/1. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — DEN
27 Nov — 4 Dec1
1 adult
1 adult, Economy, 0 bags

Cheapflights Tip: The best prices from San Francisco to Denver Intl are usually found in January or March, booked 53 days in advance, depart on a Wednesday or Tuesday and return on a Monday

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Cheapest flights from San Francisco to Denver
Explore the most affordable flight options available from San Francisco to Denver. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 28 October 2025.

Fri 14/1106:34SFO - DEN
Nonstop2h 44mFrontier
Sun 16/1107:45DEN - SFO
Nonstop2h 48mFrontier
Deal found 27/10£105
Thu 4/1212:15SFO - DEN
Nonstop2h 25mSouthwest
Mon 8/1220:45DEN - SFO
Nonstop2h 45mSouthwest
Deal found 27/10£118
Sat 6/1218:20SFO - DEN
1 stop16h 24mAlaska Airlines
Tue 9/1215:42DEN - SFO
1 stop8h 03mAlaska Airlines
Deal found 28/10£132
Sun 14/1205:00SFO - DEN
Nonstop2h 40mUnited Airlines
Wed 17/1215:59DEN - SFO
Nonstop2h 51mUnited Airlines
Deal found 26/10£133
Wed 19/1107:00SFO - DEN
1 stop27h 34mAlaska Airlines
Wed 3/1206:45DEN - SFO
1 stop8h 18mAlaska Airlines
Deal found 26/10£134
Tue 18/1107:00SFO - DEN
1 stop11h 06mAlaska Airlines
Tue 2/1218:59DEN - SFO
1 stop14h 07mAlaska Airlines
Deal found 26/10£137
Thu 25/1205:00SFO - DEN
Nonstop2h 40mUnited Airlines
Tue 30/1205:45DEN - SFO
Nonstop2h 55mUnited Airlines
Deal found 27/10£144
Tue 18/1107:00SFO - DEN
1 stop11h 06mAlaska Airlines
Wed 19/1108:20DEN - SFO
1 stop8h 27mAlaska Airlines
Deal found 28/10£146
Mon 15/1211:25SFO - DEN
1 stop6h 59mAlaska Airlines
Mon 22/1218:48DEN - SFO
1 stop6h 39mAlaska Airlines
Deal found 27/10£147

Cheap flight deals from San Francisco to Denver

Discover tips and strategies to find the most affordable flight options for your journey from San Francisco (SFO) to Denver (DEN). 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 28 October 2025.

Round-trip from

£88

One-way from

£56

Popular in

June

Cheapest in

January

Average price

£177

Good one-way deal

£161 or less
Southwest
  • Southwest
  • 7/2-11/2
  • Nonstop
  • 5h 25m total
  • San Francisco to Denver
Search Deals
Alaska Airlines
  • Alaska Airlines
  • 7/2
  • 1 total stop
  • 15h 58m total
  • San Francisco to Denver
Search Deals
Highest demand for flights based on searches. 8% potential increase in price (£12 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (£3 potential savings vs. average return price).
Search Deals
Average for round-trip flights in October 2025
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Price to beat on a one-way flight from San Francisco to Denver Intl.
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Cheapflights Fare Finder

 
Customise your flight search to find flights from San Francisco to Denver 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 858,174 searches. Data last updated 28 October 2025.
Use the filters below to find and compare flights from San Francisco to Denver that are best for you.

Fly from

San Francisco

Fly to

Denver

Route

Depart

Return

Price

San FranciscoDenver

SFO - DEN

SFODEN

San Francisco

Fri 6/2

17:16-23:58

1 stop5h 42m

Denver Intl

Mon 9/2

12:34-16:32

1 stop4h 58m

£102

San FranciscoDenver

SFO - DEN

SFODEN

San Francisco

Wed 28/1

06:05-09:35

Nonstop2h 30m

Denver Intl

Thu 29/1

10:40-14:20

1 stop4h 40m

£107

San FranciscoDenver

SFO - DEN

SFODEN

San Francisco

Thu 15/1

05:50-09:20

Nonstop2h 30m

Denver Intl

Mon 19/1

06:10-10:30

1 stop5h 20m

£110

San FranciscoDenver

SFO - DEN

SFODEN

San Francisco

Thu 29/1

07:00-18:41

1 stop10h 41m

Denver Intl

Mon 2/2

13:34-20:12

1 stop7h 38m

£117

San FranciscoDenver

SFO - DEN

SFODEN

San Francisco

Sat 6/12

20:55-00:30

Nonstop2h 35m

Denver Intl

Sat 13/12

06:00-07:50

Nonstop2h 50m

£118

San FranciscoDenver

SFO - DEN

SFODEN

San Francisco

Sat 6/12

20:31-11:44

1 stop14h 13m

Denver Intl

Tue 9/12

15:42-22:45

1 stop8h 03m

£132

San FranciscoDenver

SFO - DEN

SFODEN

San Francisco

Thu 12/2

05:10-08:47

Nonstop2h 37m

Denver Intl

Sun 15/2

07:45-09:40

Nonstop2h 55m

£140

San FranciscoDenver

SFO - DEN

SFODEN

San Francisco

Wed 3/12

07:45-15:55

2 stops7h 10m

Denver Intl

Wed 10/12

13:25-20:10

2 stops7h 45m

£140

San FranciscoDenver

SFO - DEN

SFODEN

San Francisco

Tue 13/1

17:02-23:58

1 stop5h 56m

Denver Intl

Sun 18/1

11:49-21:58

2 stops11h 09m

£146

San FranciscoDenver

SFO - DEN

SFODEN

San Francisco

Wed 3/12

06:00-11:09

1 stop4h 09m

Denver Intl

Wed 3/12

18:22-22:13

1 stop4h 51m

£148

Flights are sorted by cheapest return flights first.

Deals found on 26/10

Showing 1-10 of 21 results
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Best time to book a flight from San Francisco to Denver

Have a flexible travel schedule? Discover the best time to fly to Denver from San Francisco with our price prediction graph.
Estimated return 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 San Francisco to Denver

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

Use this chart to determine the optimal time to book a return flight from San Francisco to Denver. Price data was last updated on 24 October 2025.

The price you pay for your flight from San Francisco to Denver may vary depending on when you book. For the best chance of a lower fare, look to book 53 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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

Currently, February is the cheapest month in which you can book a flight from San Francisco to Denver (average of £21). Flying from San Francisco to Denver in June is currently the most expensive (average of £80). 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 SFO to DEN?

Find hourly flight availability from San Francisco to Denver. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 28 October 2025.

When flying from San Francisco to Denver, the time of day you fly usually plays a role in the price. Save by searching for a flight in the afternoon, which can drop the price by up to 32% versus a flight at midday.

Reviews of airlines servicing Denver

Get insights into the airlines that provide service to Denver. 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 Denver. Reviews last updated 28 October 2025.
See what other customers who have flown with Frontier from San Francisco to Denver have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Frontier
5.8
Fair
3,124 reviews
Check prices

Comfort

5.5

Overall

5.8

Crew

6.7

Boarding

6.1

Food

4.6

Entertainment

4.4

Reviews

1 / 20
2.0
Mediocre

Shawn,Sept 2025

SAN - SFO

The flight was over booked and was unadble to get help with issue. I could not get a refund or rebooked in order to make my trip
Frontier
5.8
Fair
3,124 reviews
Frontier
5.8
Fair
3,124 reviews
Check prices

Comfort

5.5

Overall

5.8

Crew

6.7

Boarding

6.1

Food

4.6

Entertainment

4.4

Reviews

1 / 20
2.0
Mediocre

Shawn,Sept 2025

SAN - SFO

The flight was over booked and was unadble to get help with issue. I could not get a refund or rebooked in order to make my trip

Related info for your journey

Find useful and relevant information for your journey from San Francisco to Denver. 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 San Francisco to Denver?

    If you book a flight from San Francisco to Denver, you will be flying from San Francisco to Denver Intl. Flights to Denver Intl (DEN) from San Francisco (SFO) take 2h 35m for a nonstop flight. There are 34 flights from San Francisco to Denver per day from 1 airline.

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

    This flight path from San Francisco to Denver Intl was viewed by 35 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 San Francisco to Denver?

    There are many flights that can get you from San Francisco to Denver in 2h 30m. Fly via Southwest, United Airlines, or Alaska Airlines to get the fastest option. Airlines will cover a distance of 964 mi. Both multi-stop and direct flights can be found to your destination and back.

  • What is the cheapest airline to fly from San Francisco to Denver round-trip?

    Flying on Frontier is currently your cheapest option to Denver, with prices starting at £60. You may be able to fly from San Francisco to Denver for 65% less than the average price by searching for this airline.

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

    Before booking your flight to Denver from San Francisco, check out the most reliable airlines to get you to your destination on time: SWISS (93%), Asiana Airlines (88%), Virgin Australia( 85%).

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

    Looking at all options, your cheapest flight can be booked for £141. While the most popular route (San Francisco - Denver Intl) can be booked for £108 on average, our data indicates £161 when flying from San Francisco to Denver.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from San Francisco to Denver 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 San Francisco to Denver?

    Currently, February is the cheapest month in which you can book a flight from San Francisco to Denver (average of £21). Flying from San Francisco to Denver in June is currently the most expensive (average of £80). 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

Travelling to a place near Denver?

Book flights to Denver if you plan to visit one of these locations
Winter Park
Frisco

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for San Francisco to Denver

See prices for flight routes from nearby airports that may be better suited for you.
Los Angeles to Denver flights
Ontario to Denver flights
San Diego to Denver flights
Santa Ana to Denver flights

Top airline flying from San Francisco to Denver

Discover the top airline that operate flights from San Francisco to Denver. 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 858,174 searches. Data last updated 28 October 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest£60Average£114FlexibilityNo cancel feeOn-time62%
Search Frontier flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from San Francisco to Denver?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from San Francisco to Denver. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

Why should you use Cheapflights to find cheap flight tickets from San Francisco to Denver?

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Denver from San Francisco.

Can Cheapflights find flights from San Francisco to Denver with no change fees?

Yes! Cheapflights helps users easily find flights from San Francisco to Denver with no change fees.

Can Cheapflights notify me if prices for flights from San Francisco to Denver become cheaper?

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Denver from San Francisco today and book when prices fit your budget.

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