Cheap flights from Denver to San Diego from $69 DEN → CLD, SAN

Found recently, and the cheapest we hold

It is also the cheapest return we hold, of any age.

What have prices looked like?

Over 48 days, 24 Sept to 11 Nov, the cheapest return we saw each day was $114 to $390.

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

Could nearby dates be cheaper?

We hold no other 4-night return fares leaving within 3 days of 23 Nov to compare.

Every date we hold

25 fares on 1 departure dates

Found recently, and the cheapest we hold

What have prices looked like?

Over 46 days, 24 Sept to 11 Nov, the cheapest one-way we saw each day was $26 to $140.

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

Could nearby dates be cheaper?

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

Every date we hold

3 fares on 3 departure dates

Which month looks cheapest?

November 2026 is the cheapest month — from $60.

Return

Fares 14 to 29 days before departure were typically 71% lower than 0 to 6 days before departure.

From the cheapest return each day between 24 Sept and 11 Nov (48 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 90 to 179 days before departure were typically 63% lower than 7 to 13 days before departure.

From the cheapest one-way each day between 24 Sept and 11 Nov (46 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 Diego?

The cheapest return found recently is $320 with Frontier Airlines, 23 Nov to 27 Nov, found 4 days ago.

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

The cheapest one-way found recently is $69 with Frontier Airlines, 7 Dec, found 3 days ago. The cheapest one-way we hold, of any age, is $60 with Frontier Airlines, 27 Nov, found 7 days ago. The cheapest one-way fare on each of 3 departure dates is usually $62 to $67.

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

November 2026 is the cheapest month for a one-way, from $60, 27 Nov, found 7 days ago.

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

In 48 days of prices between 24 Sept and 11 Nov, return fares 14 to 29 days before departure were typically 71% lower than 0 to 6 days before departure. In 46 days of prices between 24 Sept and 11 Nov, one-way fares 90 to 179 days before departure were typically 63% lower than 7 to 13 days before departure.

Is there a direct flight from Denver to San Diego?

Yes, the cheapest nonstop return found recently is $349 with Frontier Airlines, 23 Nov to 27 Nov, found 4 days ago. The cheapest nonstop one-way found recently is $69 with Frontier Airlines, 7 Dec, found 3 days ago.

How long is the flight from Denver to San Diego?

The cheapest nonstop one-way found recently, with Frontier Airlines on 7 Dec, takes 2 h 29 min from Denver International Airport (DEN) to San Diego International Airport (SAN).

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

Between 26 Nov and 7 Dec, Frontier Airlines has the cheapest one-way on all 3 departure dates we hold.