Frontier AirlinesDepart22:42
Wed, Dec 23DEN → SFO
2h 53m · Direct
$44one way, per person
View deal
- Cheapest fare
- $44
- Cheapest month
- December
- Direct flights
- Yes
- Flight time
- 2h 53m
Frontier Airlines · Wed, Dec 23
from $44
Frontier Airlines
1,530 km
Get a price alert
We'll email you when Denver → San Francisco drops to your price. It's free, and you can stop any time.
Today's cheapest fare is $44. We'll send one email to confirm. See our privacy policy.
Cheapest month to fly from Denver to San Francisco
Lowest one-way fare per person in each month. Choose a month to see every date.
Cheapest dates in December 2026
The lowest fares we've seen for each day, cheapest first.
Frontier AirlinesPlan the rest of your trip to San Francisco
Where to stay, what to do and getting around, from our travel partners.
About flights from Denver to San Francisco
Denver (DEN) and San Francisco (SFO) are about 1,530 km apart. Direct flights take around 2h 53m, and recent direct fares were with Frontier Airlines. Over the next few months, one-way fares start from $44, and December 2026 is currently the cheapest month to fly.
These prices come from searches travellers made in the last 48 hours, so they move quickly. If you see a good fare, it's worth booking soon. FlightsExp is free to use: you book directly with our travel partner.
Frequently asked questions
How much is a flight from Denver to San Francisco?
The cheapest one-way fare we've seen recently is $44 with Frontier Airlines, departing Wednesday, December 23, 2026. Over the coming months, the lowest fare in each month ranges from $44 to $47.
What is the cheapest month to fly from Denver to San Francisco?
December 2026 currently has the lowest fares, from $44 one way.
Are there direct flights from Denver to San Francisco?
Yes. Recent direct fares were with Frontier Airlines.
How long is the flight from Denver to San Francisco?
A direct flight takes about 2h 53m. Denver and San Francisco are around 1,530 km apart.
Which airlines fly from Denver to San Francisco?
Recent fares on this route were with Frontier Airlines.
More cheap flights from Denver
- Denver to Los Angelesfrom $95
- Denver to Dallasfrom $133
- Denver to Chicagofrom $54
- Denver to Minneapolisfrom $117
- Denver to Miamifrom $151
- Denver to New Yorkfrom $211
- Denver to Las Vegasfrom $68
- Denver to Salt Lake Cityfrom $128
- Denver to San Diegofrom $94
- Denver to Mexico Cityfrom $234
- Denver to Tampafrom $89
- Denver to Austinfrom $81