Cheap flights from Denver to San Francisco from $139 APA, DEN → SFO

Found recently, and the cheapest we hold

What have prices looked like?

Over 49 days, 24 Sept to 12 Nov, the cheapest return we saw each day was $94 to $211.

Those were the prices on those days, not today's.

Could nearby dates be cheaper?

We hold no other 2-night return fares leaving within 3 days of 11 Dec to compare.

Every date we hold

62 fares on 4 departure dates

Found recently, and the cheapest we hold

What have prices looked like?

Over 50 days, 24 Sept to 12 Nov, the cheapest one-way we saw each day was $47 to $151.

Those were the prices on those days, not today's.

Could nearby dates be cheaper?

No. We hold one-way fares on 1 other departure date within 3 days of 25 Nov, and it is not cheaper.

Every date we hold

15 fares on 3 departure dates

Which month looks cheapest?

December 2026 is the cheapest month — from $69.

Return

Fares 30 to 59 days before departure were typically 59% lower than 0 to 6 days before departure.

From the cheapest return each day between 24 Sept and 12 Nov (49 days), grouped by how many days ahead the flight left; one adult in economy.

Each range covers different departure dates, so this compares typical fares, not the same trip priced twice.

Prices reflect recent searches — current fares may differ.

One-way

Fares 14 to 29 days before departure were typically 49% lower than 7 to 13 days before departure.

From the cheapest one-way each day between 24 Sept and 12 Nov (50 days), grouped by how many days ahead the flight left; one adult in economy.

Each range covers different departure dates, so this compares typical fares, not the same trip priced twice.

Prices reflect recent searches — current fares may differ.

How much is a return flight from Denver to San Francisco?

The cheapest return found recently is $175 with Frontier Airlines, 11 Dec to 13 Dec, found yesterday. The cheapest return we hold, of any age, is $145 with Frontier Airlines, 25 Dec to 12 Jan 2027, found 5 days ago. The cheapest return fare on each of 4 departure dates is usually $165 to $310.

How much is a one-way flight from Denver to San Francisco?

The cheapest one-way found recently is $139 with Frontier Airlines, 25 Nov, found 3 days ago. The cheapest one-way we hold, of any age, is $69 with Frontier Airlines, 23 Dec, found 6 days ago. The cheapest one-way fare on each of 3 departure dates is usually $104 to $533.

What is the cheapest month to fly from Denver to San Francisco?

December 2026 is the cheapest month for a one-way, from $69, 23 Dec, found 6 days ago.

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

In 49 days of prices between 24 Sept and 12 Nov, return fares 30 to 59 days before departure were typically 59% lower than 0 to 6 days before departure. In 50 days of prices between 24 Sept and 12 Nov, one-way fares 14 to 29 days before departure were typically 49% lower than 7 to 13 days before departure.

Is there a direct flight from Denver to San Francisco?

Yes, the cheapest nonstop return found recently is $333 with Frontier Airlines, 26 Dec to 3 Jan 2027, found 4 days ago. The cheapest nonstop one-way found recently is $80 with Frontier Airlines, 23 Dec, found 6 days ago.

How long is the flight from Denver to San Francisco?

The cheapest nonstop one-way found recently, with Frontier Airlines on 23 Dec, takes 2 h 53 min from Denver International Airport (DEN) to San Francisco International Airport (SFO). The cheapest one-way found recently, with Frontier Airlines on 25 Nov, takes 17 h 55 min with 1 stop.

Which airlines have the cheapest flights from Denver to San Francisco?

Between 11 Dec and 27 Dec, Frontier Airlines has the cheapest return on all 4 departure dates we hold. Between 24 Nov and 23 Dec, Frontier Airlines has the cheapest one-way on 2 of the 3 departure dates we hold, and JSX Air on 1.