There are most likely no direct flights on the Denver — San Diego route
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A non-stop flight is the most convenient and comfortable way to fly from Denver to San Diego, despite the fact that sometimes flights with transfers can cost significantly less.
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Answers to questions about the route that travelers are most interested in.
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There are most likely no direct flights on the Denver — San Diego route
The cost of a one-way flight from Denver to San Diego ranges from $44 (October 2026) to $155 (August 2026). On average, the ticket price is about $100–$155.
Denver — San Diego
08/12/2026
Departure
Direct flight
AS1618
starting at $175
Denver — San Diego
08/14/2026
Departure
Direct flight
UA1281
starting at $181
Denver — San Diego
08/22/2026
Departure
Direct flight
UA5507
starting at $346
Denver — San Diego
08/26/2026
Departure
Direct flight
WN1659
starting at $290
starting at $170
starting at $181
starting at $290
starting at $59
More than 4 airlines operate flights from Denver to San Diego, including Alaska Airlines, United Airlines, Southwest Airlines, and Frontier Airlines. This is a popular route, so passengers can choose tickets based on budget and preferences. Ticket prices start from $59, and our service lets you instantly compare all options. The variety of offers simplifies planning: you can choose budget fares or more comfortable options with baggage included or extra services. We help you find the best deals so your trip is cost-efficient.
The cheapest flight ticket from Denver to San Diego according to data for the last 48 hours costs $59
Often the best time to buy tickets from Denver to San Diego is 2 months before departure.
Based on statistics over the past years, the lowest prices for flights from Denver to San Diego can be found flying in these months: October, August.
The fastest flights from Denver to San Diego start from 2 hours 25 minutes in the air.
The following airlines operate direct flights on the route Denver — San Diego: Alaska Airlines, United Airlines, Southwest Airlines
The cheapest one-way flight from Denver to San Diego departs on 08/25/2026, is operated by Frontier Airlines and costs $59
The cheapest roundtrip flight from Denver to San Diego departs on 09/12/2026, is operated by Frontier Airlines and costs $109
Fastest flight from Denver to San Diego takes 2h 25m
There are direct flights on this route 3 days a week: We, Fr, and Sa
The distance between Denver and San Diego is 1340km (831 miles). There are 36 direct flights from Denver to San Diego. The time difference between Denver and San Diego is 1h. Flights from Denver begin at 5:45 AM. The latest flight from Denver departs at 10:29 PM
We couldn't find any special offers for flights from Denver to San Diego