Cheap flights from Denver to San Diego

One-way fares from $26 · DEN → SAN · prices found by travellers in the last 48 hours

Compare all dates San Diego → Denver
Cheapest fare
$26

Frontier Airlines · Mon, Feb 1

Cheapest month
February

from $26

Direct flights
Yes

Frontier Airlines

Flight time
2h 28m

1,340 km

Get a price alert

We'll email you when Denver → San Diego drops to your price. It's free, and you can stop any time.

Today's cheapest fare is $26. We'll send one email to confirm. See our privacy policy.

Cheapest month to fly from Denver to San Diego

Lowest one-way fare per person in each month. Choose a month to see every date.

  1. November 2026 $62
  2. February 2027 Cheapest $26

Cheapest dates in February 2027

The lowest fares we've seen for each day, cheapest first.

Frontier Airlines
Depart22:29 Mon, Feb 1DEN → SAN 2h 29m · Direct
$26one way, per person
View deal
See every date in February 2027 →

Plan the rest of your trip to San Diego

Where to stay, what to do and getting around, from our travel partners.

Where to stay

Hotels in San DiegoCompare places to stay on Booking.com Find hotels →

Things to do

Things to do in San DiegoTours, attractions and day trips on Klook Explore →

Getting around

Airport transfer in San DiegoPre-book a driver to meet you at arrivals, with Kiwitaxi Book a transfer → Car hire in San DiegoCompare rental cars from major brands on EconomyBookings Compare cars →

About flights from Denver to San Diego

Denver (DEN) and San Diego (SAN) are about 1,340 km apart. Direct flights take around 2h 28m, and recent direct fares were with Frontier Airlines. Over the next few months, one-way fares start from $26, 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 Denver to San Diego?

The cheapest one-way fare we've seen recently is $26 with Frontier Airlines, departing Monday, February 1, 2027. Over the coming months, the lowest fare in each month ranges from $26 to $62.

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

February 2027 currently has the lowest fares, from $26 one way.

Are there direct flights from Denver to San Diego?

Yes. Recent direct fares were with Frontier Airlines.

How long is the flight from Denver to San Diego?

A direct flight takes about 2h 28m. Denver and San Diego are around 1,340 km apart.

Which airlines fly from Denver to San Diego?

Recent fares on this route were with Frontier Airlines.

More cheap flights from Denver

Compare flights to San Diego from other cities →