Your next trip, last seen at €18
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The lowest fare we observed for each month. Open a month to see its days, then pick your outbound and return. A day with no price is one we will search for you.
Short answer
We have seen Frontier Airlines fares from San Diego to Denver, non-stop. The lowest fare our own searches returned is €18, seen on 1 Oct 2026. The average across the fares we caught is €67. December 2026 is the cheapest month in our observations, at €18. These are prices our searches returned on the dates shown, not quotes; run a live search for today's fare.
Short answer
We have seen Frontier Airlines fares from San Diego to Denver, non-stop. The lowest fare our own searches returned is €18, seen on 1 Oct 2026. The average across the fares we caught is €67. December 2026 is the cheapest month in our observations, at €18. These are prices our searches returned on the dates shown, not quotes; run a live search for today's fare.
About this route
Explore the fares we observed from San Diego to Denver. Prices move often, so pick your dates to see the latest options.
- Route distance
- 1,340 km
- Reported fastest flight
- 2h 18m
- Airlines seen
- Frontier Airlines
- Alternative airports
- CLD, APA
Route-level information; individual journeys vary.
Published schedules report non-stop service with Frontier Airlines. Check current timetables.
A clearer picture of your fare
Frequently asked
How much is a flight from San Diego to Denver?
The lowest fare we have observed is €18, found on 1 Oct 2026. Prices move, so read it as a floor rather than a quote.
When is the cheapest month to fly from San Diego to Denver?
In our observations December 2026 is the cheapest month so far, at €18.
Are there direct flights from San Diego to Denver?
Yes. We have seen non-stop flights on this route, flown by Frontier Airlines.
Which airlines fly from San Diego to Denver?
These are the carriers we have seen on the route: Frontier Airlines.
How long does the flight from San Diego to Denver take?
The average journey time across the 67 fares we observed is 3h 59m, including any stops. Individual departures vary; the fastest observed flight is listed in the route facts above.
How many of the observed San Diego to Denver fares were non-stop?
57 of the 68 fares we observed were non-stop; the rest included at least one stop. That describes our observations, not every flight that operates.
How observed prices work, what "No data" means and what a fare includes: Read the flight price guide
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Recently observed fares. Prices may change.
Last checked: 1 Oct 2026