Cheap flights from Denver to San Diego
from 67 US$
From 164 USD — compare hundreds of airlines
The cheapest month is usually 2026-11 · 67 US$
See prices for my dates →Live fares from 100+ sites — free, with no hidden fees.
About this route
Compare flights from Denver to San Diego, a about 1,340 km route (around 2h 10m nonstop). We gather live prices from hundreds of airlines and agencies so you can find the cheapest and book on the official site, with no hidden fees. Direct flights are available. Airlines such as Frontier Airlines, United Airlines, Southwest Airlines operate this route.
When to buy and when to fly
Prices by date
Fares found by date — cheapest days in green.
How to get the best price
Airlines on this route
FAQ
What's the cheapest month to fly Denver to San Diego?
It's usually 2026-11, from 67 USD. Use the price calendar to compare other dates.
How long is the flight from Denver to San Diego?
A nonstop flight takes about 2h 10m and covers around 1,340 km. Connecting itineraries take longer.
Are there direct flights from Denver to San Diego?
Yes, this route has nonstop flights. Filter by "nonstop" to see them.
Which airlines fly from Denver to San Diego?
Frontier Airlines, United Airlines, Southwest Airlines operate this route, among others. Compare them all in the results.
When should I book Denver–San Diego flights?
As a rule of thumb, booking 3–8 weeks ahead and avoiding weekends and holidays tends to give the best prices. Use the calendar to spot the cheapest dates.
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Denver → San Diego · Live fares from 100+ sites — free, with no hidden fees.