Which airline has the best punctuality record on San Francisco to Denver flights?

Over the past year, United Airlines have had the lowest number of delays on this route, with just 12% of flights being delayed.

What is the most punctual flight time for San Francisco to Denver flights?

Historically, flights departing at night are less likely to be delayed, whereas flights leaving in the early afternoon tend to experience delays more often.

How often are flights from San Francisco to Denver delayed?

About 18% of weekly flights between San Francisco and Denver have experienced delays in the past year, with the average delay time being 148 minutes.

What day of the week experiences the fewest flight delays on this route?

Saturday tends to have the lowest number of delays on this route, whereas Thursday has historically faced a higher average of delays compared to other days of the week.

How popular is this San Francisco to Denver flight route?

This flight path from San Francisco to Denver Intl was viewed by 10 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 40m. Fly via United Airlines or Delta 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 £112. You may be able to fly from San Francisco to Denver for 49% less than the average price by searching for this airline.

Weekly flight availability from San Francisco to Denver

The most flights from SFO to DEN are scheduled on a Monday (58 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (11 on average).

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.

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).

What are the cheapest flights from San Francisco to Denver?

Looking at all options, your cheapest flight can be booked for £53. While the most popular route (San Francisco - Denver Intl) can be booked for £180 on average, our data indicates £176 when flying from San Francisco to Denver.

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 (80%), Air New Zealand (75%), Air Canada( 75%).

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 30m for a nonstop flight. There are 23 flights from San Francisco to Denver per day from 1 airline.

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.

£80+ Cheap Flights from San Francisco to Denver

Cheap flight deals from San Francisco to Denver

Enter your travel dates to find the best prices.

Cheapest

Best

Direct

Last-minute

One-way

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 8 September 2026.

Thu 1/1021:13 -

Nonstop2h 40m

Wed 7/1006:00 -

Nonstop2h 41m

Deal found 8/9£160

Tue 10/1109:25 -

1 stop6h 45m

Thu 12/1121:30 -

Nonstop2h 50m

Deal found 4/9£168

Fri 2/1019:43 -

Nonstop2h 40m

Mon 12/1005:00 -

Nonstop2h 41m

Deal found 7/9£174

Tue 6/1011:00 -

Nonstop2h 35m

Tue 13/1020:40 -

Nonstop2h 40m

Deal found 8/9£175

Wed 21/1008:10 -

1 stop6h 05m

Sat 24/1008:45 -

2 stops6h 50m

Deal found 8/9£179

Tue 27/1017:45 -

1 stop16h 17m

Sat 31/1015:30 -

1 stop20h 11m

Deal found 7/9£179

Sat 26/907:23 -

1 stop10h 09m

Tue 29/908:08 -

2 stops8h 13m

Deal found 4/9£181

Tue 27/1013:25 -

Nonstop2h 30m

Fri 30/1011:45 -

Nonstop2h 40m

Deal found 8/9£182

Wed 7/1015:20 -

1 stop6h 30m

Tue 13/1020:40 -

Nonstop2h 40m

Deal found 7/9£182

Tue 27/1006:20 -

2 stops9h 36m

Mon 2/1118:42 -

1 stop6h 14m

Deal found 7/9£183

Thu 8/1016:49 -

1 stop6h 04m

Sat 10/1018:42 -

1 stop6h 14m

Deal found 8/9£185

Find flight deals from San Francisco to Denver

Round-trip from	£160
One-way from	£80
Popular in	June
Cheapest in	February
Average price	£210
Good one-way deal	£161 or less

United Airlines
1/10-3/10
Nonstop
5h 21m total
San Francisco to Denver

Search Deals

Southwest
21/10-31/12
Nonstop
2h 35m total
San Francisco to Denver

Search Deals

Highest demand for flights based on searches. 15% potential increase in price (£31 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease (£5 potential savings vs. average return price).

Search Deals

Average for round-trip flights in September 2026

Search Deals

Price to beat on a one-way flight from San Francisco to Denver Intl.

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Cheapflights Fare Finder

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 San Francisco - DEN Denver Intl

SFODEN

San Francisco

Wed 3/2

14:12-23:17

1 stop8h 05m

Denver Intl

Wed 31/12

00:00-23:00

Nonstop0h 00m

£90

San FranciscoDenver

SFO San Francisco - DEN Denver Intl

SFODEN

San Francisco

Wed 2/12

14:16-23:14

2 stops7h 58m

Denver Intl

Wed 31/12

00:00-23:00

Nonstop0h 00m

£94

San FranciscoDenver

SFO San Francisco - DEN Denver Intl

SFODEN

San Francisco

Wed 3/2

06:05-15:09

2 stops8h 04m

Denver Intl

Wed 31/12

00:00-23:00

Nonstop0h 00m

£94

San FranciscoDenver

SFO San Francisco - DEN Denver Intl

SFODEN

San Francisco

Mon 5/10

10:29-23:47

1 stop12h 18m

Denver Intl

Wed 31/12

00:00-23:00

Nonstop0h 00m

£94

San FranciscoDenver

SFO San Francisco - DEN Denver Intl

SFODEN

San Francisco

Tue 2/3

06:05-15:09

2 stops8h 04m

Denver Intl

Wed 31/12

00:00-23:00

Nonstop0h 00m

£94

San FranciscoDenver

SFO San Francisco - DEN Denver Intl

SFODEN

San Francisco

Tue 8/12

14:16-23:14

2 stops7h 58m

Denver Intl

Wed 31/12

00:00-23:00

Nonstop0h 00m

£94

San FranciscoDenver

SFO San Francisco - DEN Denver Intl

SFODEN

San Francisco

Sat 3/10

06:23-21:49

2 stops14h 26m

Denver Intl

Wed 31/12

00:00-23:00

Nonstop0h 00m

£94

Fastest return journey

San FranciscoDenver

SFO San Francisco - DEN Denver Intl

SFODEN

San Francisco

Mon 1/3

10:00-15:09

1 stop4h 09m

Denver Intl

Wed 31/12

00:00-23:00

Nonstop0h 00m

£95

San FranciscoDenver

SFO San Francisco - DEN Denver Intl

SFODEN

San Francisco

Wed 7/10

09:20-19:25

2 stops9h 05m

Denver Intl

Wed 31/12

00:00-23:00

Nonstop0h 00m

£99

San FranciscoDenver

SFO San Francisco - DEN Denver Intl

SFODEN

San Francisco

Thu 1/10

05:00-08:40

Nonstop2h 40m

Denver Intl

Sat 3/10

05:00-06:41

Nonstop2h 41m

£160

Flights are sorted by cheapest return flights first.

Deals found on 7/9

Showing 1-10 of 21 resultsSorted by cheapest first

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.

SFO-DEN

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

Prices

Airlines

Delays

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

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 70 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 £174). Flying from San Francisco to Denver in June is currently the most expensive (average of £287). 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?

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 54% versus a flight in the afternoon.

How much does it cost for a return flight from San Francisco to Denver?

Airfare is typical for this route at the moment.

San Francisco to Denver flights typically cost between £160 and £281 in October.
The cheapest return price found within the last 5 days was £160 on United Airlines (1 Oct–3 Oct).

Reviews of airlines servicing Denver

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

5.6

Fair

2,611 reviews

Check prices

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

5.6

Fair

2,611 reviews

Frontier

5.6

Fair

2,611 reviews

Check prices

Reviews

1 / 20

2.0

Mediocre

Shri,Feb 2026

MCO - DEN

Related info for your journey

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 30m for a nonstop flight. There are 23 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 10 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 40m. Fly via United Airlines or Delta 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 £112. You may be able to fly from San Francisco to Denver for 49% 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 (80%), Air New Zealand (75%), Air Canada( 75%).
What are the cheapest flights from San Francisco to Denver?
Looking at all options, your cheapest flight can be booked for £53. While the most popular route (San Francisco - Denver Intl) can be booked for £180 on average, our data indicates £176 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 £174). Flying from San Francisco to Denver in June is currently the most expensive (average of £287). 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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Top airline flying from San Francisco to Denver

Airline	Cheapest	Average	Flexibility	On-time
Frontier	Cheapest£112	Average£139	FlexibilityNo cancel fee	On-time62%	Search Frontier flights

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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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Cheap flights from San Francisco to Denver from £80

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 21/10. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from San Francisco to Denver

Cheapest flights from San Francisco to DenverExplore 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 8 September 2026.

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 8 September 2026.

Best flights from San Francisco to DenverDiscover carefully curated flight deals from San Francisco to Denver that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 8 September 2026.

Discover carefully curated flight deals from San Francisco to Denver that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 8 September 2026.

Direct flights from San Francisco to DenverExplore direct flight options from San Francisco to Denver based on user searches, and compare prices and availability for your desired travel dates. Data last updated 8 September 2026.

Explore direct flight options from San Francisco to Denver based on user searches, and compare prices and availability for your desired travel dates. Data last updated 8 September 2026.

Last-minute flights from San Francisco to DenverDiscover last-minute flight deals from San Francisco to Denver. Data last updated 8 September 2026 and is based on user searches.

Discover last-minute flight deals from San Francisco to Denver. Data last updated 8 September 2026 and is based on user searches.

One-way flights from San Francisco to DenverSearch for one-way flight options from San Francisco to Denver. Find affordable one-way fares based on user searches. Data last updated 8 September 2026.

Search for one-way flight options from San Francisco to Denver. Find affordable one-way fares based on user searches. Data last updated 8 September 2026.

Find flight deals from San Francisco to Denver

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

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.

Cheapflights Insights

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

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 70 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?

What is the cheapest time of day to fly from SFO to DEN?

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 54% versus a flight in the afternoon.

How much does it cost for a return flight from San Francisco to Denver?

Airfare is typical for this route at the moment.

San Francisco to Denver flights typically cost between £160 and £281 in October.The cheapest return price found within the last 5 days was £160 on United Airlines (1 Oct–3 Oct).

Weekly flight availability from San Francisco to Denver

The most flights from SFO to DEN are scheduled on a Monday (58 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (11 on average).

How often are flights from San Francisco to Denver delayed?

About 18% of weekly flights between San Francisco and Denver have experienced delays in the past year, with the average delay time being 148 minutes.

What is the most punctual flight time for San Francisco to Denver flights?

Historically, flights departing at night are less likely to be delayed, whereas flights leaving in the early afternoon tend to experience delays more often.

What day of the week experiences the fewest flight delays on this route?

Saturday tends to have the lowest number of delays on this route, whereas Thursday has historically faced a higher average of delays compared to other days of the week.

Which airline has the best punctuality record on San Francisco to Denver flights?

Over the past year, United Airlines have had the lowest number of delays on this route, with just 12% of flights being delayed.

Reviews of airlines servicing Denver

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.

Related info for your journey

What airports do I use to fly from San Francisco to Denver?

How popular is this San Francisco to Denver flight route?

How long is the flight from San Francisco to Denver?

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

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

What are the cheapest flights from San Francisco to Denver?

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

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

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

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

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.

Complete your trip

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Other flights to Denver

Explore flights to Denver departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 8 September 2026.

Direct flights to Colorado

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San Francisco and Denver flights

Browse other San Francisco and Denver flight options. Last updated on 8 September 2026.

Other flights from San Francisco

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Top airline flying from San Francisco to Denver

Fly with Cheapflights

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

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

Can Cheapflights 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?

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 8 September 2026.

Best flights from San Francisco to Denver
Discover carefully curated flight deals from San Francisco to Denver that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 8 September 2026.

Direct flights from San Francisco to Denver
Explore direct flight options from San Francisco to Denver based on user searches, and compare prices and availability for your desired travel dates. Data last updated 8 September 2026.

Last-minute flights from San Francisco to Denver
Discover last-minute flight deals from San Francisco to Denver. Data last updated 8 September 2026 and is based on user searches.

One-way flights from San Francisco to Denver
Search for one-way flight options from San Francisco to Denver. Find affordable one-way fares based on user searches. Data last updated 8 September 2026.

San Francisco to Denver flights typically cost between £160 and £281 in October.
The cheapest return price found within the last 5 days was £160 on United Airlines (1 Oct–3 Oct).