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Cheap flights from San Francisco to Denver from £45

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 16/4. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — DEN
10 Apr — 17 Apr1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from San Francisco to Denver Intl are usually found in October or August, booked 53 days in advance, depart on a Tuesday or Saturday and return on a Monday

Cheap flight deals from San Francisco to Denver

Enter your travel dates to find the best prices.

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 11 March 2026.

Sat 11/406:00
SFO
-
DEN
Nonstop2h 47m
Frontier
Sat 18/421:25
DEN
-
SFO
Nonstop3h 00m
Frontier
Deal found 9/3£90
Tue 21/419:40
SFO
-
DEN
1 stop7h 19m
Frontier
Tue 28/413:40
DEN
-
SFO
1 stop8h 59m
Frontier
Deal found 6/3£93
Sun 12/422:57
SFO
-
DEN
1 stop28h 02m
Frontier
Mon 20/422:29
DEN
-
SFO
Nonstop2h 58m
Frontier
Deal found 9/3£95
Fri 10/422:08
SFO
-
DEN
1 stop10h 35m
Frontier
Fri 17/422:29
DEN
-
SFO
Nonstop2h 58m
Frontier
Deal found 7/3£105
Sat 11/418:43
SFO
-
DEN
Nonstop2h 51m
Frontier
Sun 19/406:00
DEN
-
SFO
1 stop5h 50m
Frontier
Deal found 9/3£120
Mon 20/422:01
SFO
-
DEN
1 stop10h 42m
Frontier
Mon 27/407:15
DEN
-
SFO
Nonstop2h 58m
Frontier
Deal found 6/3£123
Tue 21/419:07
SFO
-
DEN
Nonstop2h 52m
United Airlines
Tue 28/405:15
DEN
-
SFO
Nonstop2h 50m
United Airlines
Deal found 9/3£132
Wed 13/506:00
SFO
-
DEN
Nonstop2h 52m
Frontier
Wed 20/522:29
DEN
-
SFO
1 stop11h 20m
Frontier
Deal found 10/3£132

Find 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 11 March 2026.

Round-trip from

£90

One-way from

£45

Popular in

December

Cheapest in

October

Average price

£184

Good round-trip deal

£135 or less
Frontier
  • Frontier
  • 11/4-18/4
  • Nonstop
  • 5h 47m total
  • San Francisco to Denver
Search Deals
Frontier
  • Frontier
  • 16/4
  • Nonstop
  • 2h 51m total
  • San Francisco to Denver
Search Deals
Highest demand for flights based on searches. 8% potential increase in price (£11 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£3 potential savings vs. average return price).
Search Deals
Average for round-trip flights in March 2026
Search Deals
Price to beat on a round-trip flight from San Francisco to Denver Intl.
Search Deals

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 11 March 2026.
Use the filters below to find and compare flights from San Francisco to Denver that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

San FranciscoDenver

SFO - DEN

SFODEN

San Francisco

Tue 5/5

10:32-22:29

2 stops10h 57m

Denver Intl

Sat 9/5

06:05-12:29

1 stop7h 24m

£140
Fastest return journey

San FranciscoDenver

SFO - DEN

SFODEN

San Francisco

Tue 21/4

19:15-22:50

Nonstop2h 35m

Denver Intl

Tue 28/4

20:25-22:10

Nonstop2h 45m

£147

San FranciscoDenver

SFO - DEN

SFODEN

San Francisco

Wed 13/5

09:30-17:35

1 stop7h 05m

Denver Intl

Wed 20/5

05:40-08:53

1 stop4h 13m

£161

San FranciscoDenver

SFO - DEN

SFODEN

San Francisco

Sat 16/5

13:35-23:52

1 stop9h 17m

Denver Intl

Tue 19/5

05:40-12:29

2 stops7h 49m

£170

San FranciscoDenver

SFO - DEN

SFODEN

San Francisco

Tue 21/4

10:32-22:29

2 stops10h 57m

Denver Intl

Tue 28/4

12:30-23:37

2 stops12h 07m

£174

San FranciscoDenver

SFO - DEN

SFODEN

San Francisco

Sat 11/4

14:30-23:23

1 stop7h 53m

Denver Intl

Sat 18/4

05:30-08:59

1 stop4h 29m

£176

San FranciscoDenver

SFO - DEN

SFODEN

San Francisco

Tue 21/4

13:35-23:56

1 stop9h 21m

Denver Intl

Thu 23/4

06:00-20:14

1 stop15h 14m

£188

San FranciscoDenver

SFO - DEN

SFODEN

San Francisco

Sat 11/4

06:15-12:00

1 stop4h 45m

Denver Intl

Sat 18/4

08:45-19:20

2 stops11h 35m

£199

San FranciscoDenver

SFO - DEN

SFODEN

San Francisco

Mon 20/4

15:40-23:45

2 stops7h 05m

Denver Intl

Mon 27/4

20:10-00:10

1 stop5h 00m

£210

San FranciscoDenver

SFO - DEN

SFODEN

San Francisco

Wed 1/4

06:25-14:20

2 stops6h 55m

Denver Intl

Sun 5/4

06:15-11:05

1 stop5h 50m

£225

Flights are sorted by cheapest return flights first.

Deals found on 8/3

Showing 1-10 of 23 resultsSorted by cheapest first
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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 6 March 2026.

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, January is the cheapest month in which you can book a flight from San Francisco to Denver (average of £43). Flying from San Francisco to Denver in July is currently the most expensive (average of £78). 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 11 March 2026.

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 morning, which can drop the price by up to 61% 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 11 March 2026.
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
5.7
Fair
3,034 reviews
Check prices

Crew

6.6

Boarding

6.0

Entertainment

4.3

Food

4.6

Comfort

5.5

Overall

5.7

Reviews

1 / 20
2.0
Mediocre

Shri,Feb 2026

MCO - DEN

Plane was dirty, food strewn all over the floor. The flight attendant was dozing in her chair for most of the flight. Even the announcements sounded so unenthusiastic. The seats are old and dirty, the seat belts look worn out.
Frontier
5.7
Fair
3,034 reviews
Frontier
5.7
Fair
3,034 reviews
Check prices

Crew

6.6

Boarding

6.0

Entertainment

4.3

Food

4.6

Comfort

5.5

Overall

5.7

Reviews

1 / 20
2.0
Mediocre

Shri,Feb 2026

MCO - DEN

Plane was dirty, food strewn all over the floor. The flight attendant was dozing in her chair for most of the flight. Even the announcements sounded so unenthusiastic. The seats are old and dirty, the seat belts look worn out.

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 47m for a nonstop flight. There are 44 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 25 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 47m. Fly via Frontier to get the fastest option. Airlines will cover a distance of 964 mi. Generally, flights for this route are direct.

  • 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 £105. You may be able to fly from San Francisco to Denver for 43% 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: Volaris (96%), Frontier (85%), ANA( 85%).

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

    Looking at all options, your cheapest flight can be booked for £114. While the most popular route (San Francisco - Denver Intl) can be booked for £132 on average, our data indicates £140 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 £43). Flying from San Francisco to Denver in July is currently the most expensive (average of £78). 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

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
Santa Ana to Denver flights
Ontario 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 11 March 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest£105Average£140FlexibilityNo 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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