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Cheap flights from San Francisco to Denver from $136

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 28/10. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — DEN
23 Jul — 30 Jul1
1 adult

Cheapflights Tip: The best prices from San Francisco to Denver Intl are usually found in January or October, booked 52 days in advance, depart on a Monday or Sunday 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 18 July 2025.

Round-trip from

$242

One-way from

$136

Popular in

June

Cheapest in

January

Average price

$390

Good round-trip deal

$476 or less
United Airlines
  • United Airlines
  • 16/8-23/8
  • Nonstop
  • 5h 18m total
  • San Francisco to Denver
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Alaska Airlines
  • Alaska Airlines
  • 28/10
  • 1 total stop
  • 6h 20m total
  • San Francisco to Denver
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Highest demand for flights based on searches. 11% potential increase in price ($69 potential increase over avg. return price).
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Cheapest flight prices on average. 2% potential price decrease ($12 potential savings vs. average return price).
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Average for round-trip flights in July 2025
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Price to beat on a round-trip 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 18 July 2025.

Sat 16/805:00SFO - DEN
Nonstop2h 36mUnited Airlines
Sat 23/808:02DEN - SFO
Nonstop2h 42mUnited Airlines
Deal found 17/7$242
Sun 31/809:21SFO - DEN
Nonstop2h 39mFrontier
Sun 7/922:29DEN - SFO
Nonstop2h 47mFrontier
Deal found 17/7$247
Sat 23/806:34SFO - DEN
Nonstop2h 40mMultiple Airlines
Sat 30/811:40DEN - SFO
1 stop5h 44mMultiple Airlines
Deal found 17/7$253
Thu 21/819:45SFO - DEN
Nonstop2h 25mSouthwest
Mon 25/806:45DEN - SFO
1 stop4h 45mSouthwest
Deal found 16/7$258
Wed 1/1011:30SFO - DEN
1 stop7h 57mAlaska Airlines
Thu 2/1021:23DEN - SFO
1 stop12h 49mAlaska Airlines
Deal found 18/7$271
Sat 23/810:55SFO - DEN
1 stop6h 26mDelta
Wed 27/807:20DEN - SFO
1 stop5h 51mDelta
Deal found 18/7$335

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 647,157 searches. Data last updated 18 July 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

Sat 16/8

05:00-08:36

Nonstop2h 36m

Denver Intl

Sat 23/8

08:02-09:44

Nonstop2h 42m

$242

San FranciscoDenver

SFO - DEN

SFODEN

San Francisco

Sun 31/8

09:21-13:00

Nonstop2h 39m

Denver Intl

Sun 7/9

22:29-00:16

Nonstop2h 47m

$247

San FranciscoDenver

SFO - DEN

SFODEN

San Francisco

Sat 23/8

06:34-10:14

Nonstop2h 40m

Denver Intl

Sat 30/8

11:40-16:24

1 stop5h 44m

$253

San FranciscoDenver

SFO - DEN

SFODEN

San Francisco

Thu 21/8

19:45-23:10

Nonstop2h 25m

Denver Intl

Mon 25/8

06:45-10:30

1 stop4h 45m

$258

San FranciscoDenver

SFO - DEN

SFODEN

San Francisco

Wed 1/10

11:30-20:27

1 stop7h 57m

Denver Intl

Thu 2/10

21:23-09:12

1 stop12h 49m

$271

San FranciscoDenver

SFO - DEN

SFODEN

San Francisco

Sat 23/8

10:55-18:21

1 stop6h 26m

Denver Intl

Wed 27/8

07:20-12:11

1 stop5h 51m

$335

San FranciscoDenver

SFO - DEN

SFODEN

San Francisco

Tue 28/10

16:39-23:59

1 stop6h 20m

$136

San FranciscoDenver

SFO - DEN

SFODEN

San Francisco

Mon 18/8

17:15-23:10

1 stop4h 55m

$137

San FranciscoDenver

SFO - DEN

SFODEN

San Francisco

Sun 5/10

05:05-08:40

Nonstop2h 35m

$153

San FranciscoDenver

SFO - DEN

SFODEN

San Francisco

Sun 5/10

06:45-14:00

1 stop6h 15m

$167

Flights are sorted by cheapest return flights first.

Deals found on 18/7

Showing 1-10 of 11 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 11 July 2025.

To ensure you get the cheapest price possible for a flight from San Francisco to Denver, you should look to book at least 52 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

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

Currently, March is the cheapest month in which you can book a flight from San Francisco to Denver (average of $988). Flying from San Francisco to Denver in December is currently the most expensive (average of $1,617). 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 18 July 2025.

It’s optimal to fly from San Francisco to Denver at midday. By choosing this option you can save up to 11% on the cost of your flight, compared to a flight in the morning.

Weekly flight availability from San Francisco to Denver

Explore weekly flight availability from San Francisco to Denver. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 18 July 2025.

The most flights from SFO to DEN are scheduled on a Friday (59 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (40 on average).

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 18 July 2025.
Read through reviews of airlines operating flights from San Francisco to Denver, such as Alaska Airlines, Southwest, andDelta. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very Good
10,000 reviews
Check prices

Entertainment

7.1

Comfort

7.8

Food

7.1

Overall

8.0

Boarding

8.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very Good
10,000 reviews
Alaska Airlines
8.0
Very Good
10,000 reviews
Check prices

Entertainment

7.1

Comfort

7.8

Food

7.1

Overall

8.0

Boarding

8.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Southwest
8.0
Very Good
4,238 reviews
Alaska Airlines
8.0
Very Good
10,000 reviews
Check prices

Entertainment

7.1

Comfort

7.8

Food

7.1

Overall

8.0

Boarding

8.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Delta
8.0
Very Good
7,958 reviews
Alaska Airlines
8.0
Very Good
10,000 reviews
Check prices

Entertainment

7.1

Comfort

7.8

Food

7.1

Overall

8.0

Boarding

8.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Hawaiian Airlines
7.8
Good
2,583 reviews
Alaska Airlines
8.0
Very Good
10,000 reviews
Check prices

Entertainment

7.1

Comfort

7.8

Food

7.1

Overall

8.0

Boarding

8.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
United Airlines
7.4
Good
8,865 reviews
Alaska Airlines
8.0
Very Good
10,000 reviews
Check prices

Entertainment

7.1

Comfort

7.8

Food

7.1

Overall

8.0

Boarding

8.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

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 40m for a nonstop flight. There are 49 flights from San Francisco to Denver per day from 1 airline.

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

    Flights from San Francisco to Denver Intl have been viewed 36 times in the past calendar month.

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

    Cheapflights users have booked flights from San Francisco to Denver round-trip from $242. Other airlines that can offer you cheap pricing are Frontier, from $247, and Southwest, from $258. Users have found that United Airlines is 30% cheaper than the other options available to this destination.

  • What are the cheapest airlines to fly from San Francisco to Denver one-way?

    $136 is the cheapest one-way deal found within the past few days, from Alaska Airlines. You may also be able to find cheap deals on Southwest and United Airlines, with prices starting from $137 and $153, respectively.

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

    The top 3 most reliable airlines when flying from San Francisco to Denver are Asiana Airlines (78%), Air Canada (76%) and United Airlines (75%).

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

    The cheapest flight price from San Francisco to Denver is $476. On average you can expect to pay $846. The most popular route, (San Francisco - Denver Intl), can usually be booked for $253.

  • 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, March is the cheapest month in which you can book a flight from San Francisco to Denver (average of $988). Flying from San Francisco to Denver in December is currently the most expensive (average of $1,617). 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

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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
Las Vegas 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 647,157 searches. Data last updated 18 July 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$99Average$114FlexibilityNo cancel feeOn-time62%
Search Frontier flights

Fly with Cheapflights

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

Cheapflights helps you search for flights from San Francisco to Denver via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

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?

Users can book flights with no change fees policies with our dedicated filters. Book flights from San Francisco to Denver flexibly with Cheapflights today.

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

Yes! Start tracking prices for San Francisco to Denver flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

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