Cheap flights from San Francisco to San Diego from $19 SFO → CLD, SAN

Found recently, and the cheapest we hold

What have prices looked like?

Over 49 days, 24 Sept to 11 Nov, the cheapest return we saw each day was $41 to $111.

At $139, the cheapest return found recently is above that range.

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

Could nearby dates be cheaper?

We hold no other 7-night return fares leaving within 3 days of 7 Dec to compare.

Every date we hold

93 fares on 10 departure dates

Which month looks cheapest?

March 2027 is the cheapest month — from $84.

Found recently, and the cheapest we hold

It is also the cheapest one-way we hold, of any age.

What have prices looked like?

Over 49 days, 24 Sept to 11 Nov, the cheapest one-way we saw each day was $17 to $30.

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 12 Dec, and it is not cheaper.

Every date we hold

5 fares on 5 departure dates

Which month looks cheapest?

December 2026 is the cheapest month — from $19.

Return

Fares 14 to 29 days before departure were typically 59% lower than 0 to 6 days before departure.

From the cheapest return each day between 24 Sept and 11 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 30 to 59 days before departure were typically 78% lower than 0 to 6 days before departure.

From the cheapest one-way each day between 24 Sept and 11 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.

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

The cheapest return found recently is $139 with Frontier Airlines, 7 Dec to 14 Dec, found 2 days ago. The cheapest return we hold, of any age, is $84 with Frontier Airlines, 2 Mar 2027 to 4 Mar 2027, found 6 days ago. The cheapest return fare on each of 10 departure dates is usually $144 to $230.

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

The cheapest one-way found recently is $19 with Frontier Airlines, 12 Dec, found 2 days ago. The cheapest one-way fare on each of 5 departure dates is usually $19 to $114.

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

March 2027 is the cheapest month for a return, from $84, 2 Mar 2027 to 4 Mar 2027, found 6 days ago. December 2026 is the cheapest month for a one-way, from $19, 9 Dec, found 3 days ago.

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

In 49 days of prices between 24 Sept and 11 Nov, return fares 14 to 29 days before departure were typically 59% lower than 0 to 6 days before departure. One-way fares 30 to 59 days before departure were typically 78% lower than 0 to 6 days before departure.

Is there a direct flight from San Francisco to San Diego?

Yes, the cheapest nonstop return found recently is $139 with Frontier Airlines, 7 Dec to 14 Dec, found 2 days ago. The cheapest nonstop one-way found recently is $19 with Frontier Airlines, 12 Dec, found 2 days ago.

Every nonstop date from San Francisco to San Diego

How long is the flight from San Francisco to San Diego?

The cheapest nonstop one-way found recently, with Frontier Airlines on 12 Dec, takes 1 h 43 min from San Francisco International Airport (SFO) to San Diego International Airport (SAN).

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

Between 16 Nov and 2 Mar 2027, Frontier Airlines has the cheapest return on 8 of the 10 departure dates we hold, Alaska Airlines on 1 and Southwest Airlines on 1. Between 15 Nov and 30 Jun 2027, Frontier Airlines has the cheapest one-way on 4 of the 5 departure dates we hold, and Alaska Airlines on 1.