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Cheap flights from San Francisco to Denver from £49

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 7/2. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — DEN
12 10月 — 19 10月1
1 adult
1 adult, Economy

Cheapflights Tip: The best prices from San Francisco to Denver Intl are usually found in October or January, booked 28 days in advance, depart on a Wednesday or Tuesday and return on a Tuesday

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 12 9月 2025.

Round-trip from

£94

One-way from

£49

Popular in

June

Cheapest in

October

Average price

£146

Good one-way deal

£92 or less
Frontier
  • Frontier
  • 17/10-20/10
  • 1 total stop
  • 14h 24m total
  • San Francisco to Denver
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United Airlines
  • United Airlines
  • 10/1
  • Nonstop
  • 2h 40m total
  • San Francisco to Denver
Search Deals
Highest demand for flights based on searches. 11% potential increase in price (£15 potential increase over avg. return price).
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Cheapest flight prices on average. 2% potential price decrease (£3 potential savings vs. average return price).
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Average for round-trip flights in September 2025
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Price to beat on a one-way flight from San Francisco to Denver Intl.
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Find flight deals from San Francisco to Denver

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 12 9月 2025.

週五 17/1020:21SFO - DEN
Nonstop2h 41mFrontier
週一 20/1008:30DEN - SFO
1 stop11h 43mFrontier
Deal found 10/9£94
週二 30/918:40SFO - DEN
Nonstop2h 37mUnited Airlines
週六 4/1015:55DEN - SFO
Nonstop2h 41mUnited Airlines
Deal found 11/9£98
週六 25/1010:24SFO - DEN
1 stop6h 33mFrontier
週六 1/1112:00DEN - SFO
1 stop5h 03mFrontier
Deal found 10/9£104
週二 14/1005:45SFO - DEN
Nonstop2h 25mSouthwest
週六 18/1010:50DEN - SFO
1 stop6h 55mSouthwest
Deal found 11/9£106
週二 30/916:40SFO - DEN
Nonstop2h 40mUnited Airlines
週五 3/1019:10DEN - SFO
Nonstop2h 44mUnited Airlines
Deal found 10/9£110
週二 4/1105:50SFO - DEN
Nonstop2h 25mSouthwest
週四 6/1105:40DEN - SFO
1 stop5h 55mSouthwest
Deal found 11/9£117
週五 3/1016:50SFO - DEN
Nonstop2h 30mSouthwest
週一 6/1022:30DEN - SFO
Nonstop2h 35mSouthwest
Deal found 10/9£122
週二 21/1010:26SFO - DEN
1 stop7h 44mAlaska Airlines
週二 28/1008:20DEN - SFO
1 stop14h 41mAlaska Airlines
Deal found 10/9£123

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 12 9月 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

週二 7/10

06:35-10:15

Nonstop2h 40m

Denver Intl

週六 11/10

21:10-22:57

Nonstop2h 47m

£98

San FranciscoDenver

SFO - DEN

SFODEN

San Francisco

週五 23/1

21:40-11:39

1 stop12h 59m

Denver Intl

週二 27/1

19:04-23:33

1 stop5h 29m

£124

San FranciscoDenver

SFO - DEN

SFODEN

San Francisco

週三 5/11

14:26-23:51

2 stops8h 25m

Denver Intl

週一 10/11

11:31-17:22

1 stop6h 51m

£147

San FranciscoDenver

SFO - DEN

SFODEN

San Francisco

週二 11/11

14:26-23:51

2 stops8h 25m

Denver Intl

週一 17/11

18:46-08:55

1 stop15h 09m

£147

San FranciscoDenver

SFO - DEN

SFODEN

San Francisco

週二 30/9

20:52-00:29

Nonstop2h 37m

Denver Intl

週六 4/10

13:30-15:12

Nonstop2h 42m

£150

San FranciscoDenver

SFO - DEN

SFODEN

San Francisco

週二 3/3

05:15-08:50

Nonstop2h 35m

Denver Intl

週三 4/3

21:05-22:45

Nonstop2h 40m

£150

San FranciscoDenver

SFO - DEN

SFODEN

San Francisco

週三 1/10

08:55-18:22

1 stop8h 27m

Denver Intl

週一 6/10

12:43-17:45

1 stop6h 02m

£157

San FranciscoDenver

SFO - DEN

SFODEN

San Francisco

週二 21/10

08:27-19:10

2 stops9h 43m

Denver Intl

週五 24/10

07:01-14:01

1 stop8h 00m

£159

San FranciscoDenver

SFO - DEN

SFODEN

San Francisco

週三 11/2

16:31-20:12

Nonstop2h 41m

Denver Intl

週一 16/2

06:00-07:50

Nonstop2h 50m

£159

San FranciscoDenver

SFO - DEN

SFODEN

San Francisco

週三 4/2

12:30-16:00

Nonstop2h 30m

£49

Flights are sorted by cheapest return flights first.

Deals found on 10/9

Showing 1-10 of 18 results
1
2

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 29 August 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 28 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, January is the cheapest month in which you can book a flight from San Francisco to Denver (average of £667). Flying from San Francisco to Denver in July is currently the most expensive (average of £987). 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 12 9月 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 at midday, which can drop the price by up to 62% versus a flight in the evening.

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 12 9月 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
3,177 reviews
Check prices

Food

4.7

Boarding

6.1

Overall

5.8

Entertainment

4.4

Crew

6.7

Comfort

5.5

Reviews

1 / 20
4.0
Okay

Paulina,Jun 2025

MSY - DEN

The staff in the plane and outside of the plane were very rude. My flight was delayed 3 times which i understand was not the staff’s fault but my boarding pass time was never updated which had multiple people very confused and when I asked the question of why no answer was given. They made a handful of people check their bag and upon entering the plane there was still plenty of room.
Frontier
5.8
Fair
3,177 reviews
Frontier
5.8
Fair
3,177 reviews
Check prices

Food

4.7

Boarding

6.1

Overall

5.8

Entertainment

4.4

Crew

6.7

Comfort

5.5

Reviews

1 / 20
4.0
Okay

Paulina,Jun 2025

MSY - DEN

The staff in the plane and outside of the plane were very rude. My flight was delayed 3 times which i understand was not the staff’s fault but my boarding pass time was never updated which had multiple people very confused and when I asked the question of why no answer was given. They made a handful of people check their bag and upon entering the plane there was still plenty of room.

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 37m for a nonstop flight. There are 42 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 33 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 United Airlines, Southwest, 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 64% 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: Asiana Airlines (83%), Air Canada (73%), Virgin Australia( 72%).

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

    Looking at all options, your cheapest flight can be booked for £54. While the most popular route (San Francisco - Denver Intl) can be booked for £75 on average, our data indicates £129 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, January is the cheapest month in which you can book a flight from San Francisco to Denver (average of £667). Flying from San Francisco to Denver in July is currently the most expensive (average of £987). 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

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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
Santa Ana to Denver flights
San Diego 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 12 9月 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest£60Average£124FlexibilityNo 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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