Frontier AirlinesDepart06:15
Tue, Feb 23SFO → DEN
2h 40m · Direct
$45one way, per person
View deal
- Cheapest fare
- $45
- Cheapest month
- February
- Direct flights
- Yes
- Flight time
- 2h 40m
Frontier Airlines · Tue, Feb 23
from $45
Frontier Airlines
1,530 km
Get a price alert
We'll email you when San Francisco → Denver drops to your price. It's free, and you can stop any time.
Today's cheapest fare is $45. We'll send one email to confirm. See our privacy policy.
Cheapest month to fly from San Francisco to Denver
Lowest one-way fare per person in each month. Choose a month to see every date.
Cheapest dates in February 2027
The lowest fares we've seen for each day, cheapest first.
Frontier AirlinesPlan the rest of your trip to Denver
Where to stay, what to do and getting around, from our travel partners.
About flights from San Francisco to Denver
San Francisco (SFO) and Denver (DEN) are about 1,530 km apart. Direct flights take around 2h 40m, and recent direct fares were with Frontier Airlines. Over the next few months, one-way fares start from $45, and February 2027 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 San Francisco to Denver?
The cheapest one-way fare we've seen recently is $45 with Frontier Airlines, departing Tuesday, February 23, 2027. Over the coming months, the lowest fare in each month ranges from $45 to $107.
What is the cheapest month to fly from San Francisco to Denver?
February 2027 currently has the lowest fares, from $45 one way.
Are there direct flights from San Francisco to Denver?
Yes. Recent direct fares were with Frontier Airlines.
How long is the flight from San Francisco to Denver?
A direct flight takes about 2h 40m. San Francisco and Denver are around 1,530 km apart.
Which airlines fly from San Francisco to Denver?
Recent fares on this route were with Frontier Airlines.
More cheap flights from San Francisco
- San Francisco to Los Angelesfrom $68
- San Francisco to Las Vegasfrom $35
- San Francisco to New Yorkfrom $144
- San Francisco to Dallasfrom $77
- San Francisco to Manilafrom $493
- San Francisco to Ontariofrom $75
- San Francisco to San Diegofrom $18
- San Francisco to New Delhifrom $485
- San Francisco to Phoenixfrom $46
- San Francisco to Taipeifrom $247
- San Francisco to Chicagofrom $218
- San Francisco to Moscowfrom $504