Cheap flights from San Diego to Denver
Cheap return flights from San Diego to Denver
Find the best deals
All prices shown are per person based on return flights only. Prices found in the last 48 hours.
Denver flight facts
What you need to know
What are the cheapest airlines?
- Frontier Airlines
- Southwest Airlines
- Spirit Airlines
These airlines usually offer the cheapest flights from San Diego to Denver.
What airlines fly indirectly?
- American Airlines
- United Airlines
- Delta Air Lines
These airlines fly from San Diego to Denver, but you’ll have at least one layover.
How long is the flight?
2 hours 15 minutes
This is the shortest flight time from San Diego to Denver.
Alternative flights from the UK to Denver
Check out prices for other routes
Alternative flights from San Diego
You might find cheaper flights nearby
Today alone, Netflights has searched over five flights. 05 / Feb / 2026 is currently the lowest priced day of the year to fly the San Diego/Denver route. There are around 35 flights on any given week from the UK to Denver and the cheapest month to fly right now is February. Not suitable? Try running another search or viewing all cheap flight deals.
How to get cheap flights from San Diego to Denver
Tips and advice from our flight experts
You've searched for flights from San Diego to Denver. We've found 25 flights and compared them to give you the best offer. Frontier Airlines is, on average, the cheapest for this route. Look out for them! The cheapest offer we've found is a one-way ticket for the route from San Diego to Denver on 03/02/2026 at 18:40 for £59.
We've scanned hundreds of airfares from dozens of airlines across the globe. In total, we've found 10 airlines that operate the 1,200 km flight from San Diego to Denver.
To find the best offers, consider booking 2-3 months in advance or looking for last-minute deals. Flying during off-peak seasons can also save you money. Frontier Airlines is a popular and budget-friendly option for this route, with an average flight duration of 2 hours 15 minutes. After selecting an offer, fill out your information and proceed to payment. Don't forget to check our flight + hotel service to book everything at once, saving you time and money!
Other popular destinations near Denver
Where other people are flying to
