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Cheap flights from San Francisco to Denver from $121

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 22/9. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — DEN
18 Jun — 25 Jun1
1 adult

Cheapflights Tip: The best prices from San Francisco to Denver Intl are usually found in January or September, booked 24 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 13 June 2025.

Round-trip from

$236

One-way from

$121

Popular in

June

Cheapest in

January

Average price

$425

Good round-trip deal

$638 or less

Good one-way deal

$194 or less
Frontier
  • Frontier
  • 22/7-29/7
  • Nonstop
  • 5h 29m total
  • San Francisco to Denver
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Southwest
  • Southwest
  • 22/9
  • Nonstop
  • 2h 25m total
  • San Francisco to Denver
Search Deals
Highest demand for flights based on searches. 11% potential increase in price ($68 potential increase over avg. return price).
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Cheapest flight prices on average. 2% potential price decrease ($13 potential savings vs. average return price).
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Average for round-trip flights in June 2025
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Price to beat on a round-trip flight from San Francisco to Denver Intl.
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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 13 June 2025.

Tue 22/706:37SFO - DEN
Nonstop2h 40mFrontier
Tue 29/721:36DEN - SFO
Nonstop2h 49mFrontier
Deal found 11/6$236
Sat 18/1010:55SFO - DEN
Nonstop2h 30mSouthwest
Thu 23/1011:00DEN - SFO
Nonstop2h 30mSouthwest
Deal found 12/6$241
Fri 1/821:15SFO - DEN
Nonstop2h 33mUnited Airlines
Tue 5/816:00DEN - SFO
Nonstop2h 43mUnited Airlines
Deal found 11/6$287
Thu 6/1107:00SFO - DEN
1 stop11h 03mAlaska Airlines
Tue 11/1112:49DEN - SFO
1 stop6h 23mAlaska Airlines
Deal found 13/6$301
Sat 12/705:30SFO - DEN
1 stop5h 28mDelta
Sat 19/718:10DEN - SFO
1 stop5h 41mDelta
Deal found 12/6$333

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 13 June 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

Tue 22/7

06:37-10:17

Nonstop2h 40m

Denver Intl

Tue 29/7

21:36-23:25

Nonstop2h 49m

$236

San FranciscoDenver

SFO - DEN

SFODEN

San Francisco

Sat 18/10

10:55-14:25

Nonstop2h 30m

Denver Intl

Thu 23/10

11:00-12:30

Nonstop2h 30m

$241

San FranciscoDenver

SFO - DEN

SFODEN

San Francisco

Fri 1/8

21:15-00:48

Nonstop2h 33m

Denver Intl

Tue 5/8

16:00-17:43

Nonstop2h 43m

$287

San FranciscoDenver

SFO - DEN

SFODEN

San Francisco

Thu 6/11

07:00-19:03

1 stop11h 03m

Denver Intl

Tue 11/11

12:49-18:12

1 stop6h 23m

$301

San FranciscoDenver

SFO - DEN

SFODEN

San Francisco

Sat 12/7

05:30-11:58

1 stop5h 28m

Denver Intl

Sat 19/7

18:10-22:51

1 stop5h 41m

$333

San FranciscoDenver

SFO - DEN

SFODEN

San Francisco

Mon 22/9

05:30-08:55

Nonstop2h 25m

$121

San FranciscoDenver

SFO - DEN

SFODEN

San Francisco

Mon 8/9

14:42-21:47

1 stop6h 05m

$135

San FranciscoDenver

SFO - DEN

SFODEN

San Francisco

Sat 11/10

05:05-08:40

Nonstop2h 35m

$173

San FranciscoDenver

SFO - DEN

SFODEN

San Francisco

Wed 8/10

08:27-23:47

2 stops14h 20m

$187

San FranciscoDenver

SFO - DEN

SFODEN

San Francisco

Fri 4/7

12:35-18:19

1 stop4h 44m

$210

Flights are sorted by cheapest return flights first.

Deals found on 11/6

Showing 1-10 of 11 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 9 June 2025.

To ensure you get the cheapest price possible for a flight from San Francisco to Denver, you should look to book at least 24 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 13 June 2025.

It’s optimal to fly from San Francisco to Denver in the morning. By choosing this option you can save up to 73% on the cost of your flight, compared to a flight in the afternoon.

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 13 June 2025.

The most flights from SFO to DEN are scheduled on a Thursday (61 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (28 on average).

Rainfall in Denver by month

Plan your trip to Denver by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Denver ranges from 13.0 - 58.0 inches per month. May is typically the wettest month, when rainfall can reach 58.0 mm. January is typically the driest time to visit Denver when rainfall is around 13.0 mm.

Temperature in Denver by month

Plan your trip to Denver by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Denver, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 23.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around -1.0 C).

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 13 June 2025.
See what other customers who have flown with Alaska Airlines, Southwest and Delta from San Francisco to Denver have to say. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very Good
10,000 reviews
Check prices

Entertainment

7.1

Overall

8.0

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

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

Overall

8.0

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

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
4,286 reviews
Alaska Airlines
8.0
Very Good
10,000 reviews
Check prices

Entertainment

7.1

Overall

8.0

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

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
7,946 reviews
Alaska Airlines
8.0
Very Good
10,000 reviews
Check prices

Entertainment

7.1

Overall

8.0

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Hawaiian Airlines
7.9
Good
2,496 reviews
Alaska Airlines
8.0
Very Good
10,000 reviews
Check prices

Entertainment

7.1

Overall

8.0

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

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
8,790 reviews
Alaska Airlines
8.0
Very Good
10,000 reviews
Check prices

Entertainment

7.1

Overall

8.0

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

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 33m for a nonstop flight. There are 48 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 35 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 $236. Other airlines that can offer you cheap pricing are Southwest, from $241, and United Airlines, from $287. Users have found that Frontier 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?

    $121 is the cheapest one-way deal found within the past few days, from Southwest. You may also be able to find cheap deals on Hawaiian Airlines and United Airlines, with prices starting from $135 and $173, 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 Virgin Australia (85%), Air Canada (84%) and Air New Zealand (82%).

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

    The cheapest flight price from San Francisco to Denver is $120. On average you can expect to pay $564. The most popular route, (San Francisco - Denver Intl), can usually be booked for $442.

  • 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

Travelling to a place near San Francisco?

Book flights to San Francisco if you plan to visit one of these locations
Copper Mountain

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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.
Las Vegas to Denver flights
Los Angeles 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 13 June 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$98Average$98FlexibilityNo 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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