California Tower and palm trees in Balboa Park, San Diego

Cheap Flights from Denver (DEN) to San Diego (SAN)

  • About 852 miles
  • About 2.2 hours
  • Best months: May, Sep, Oct
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Planning a trip from Denver to San Diego? This 852-mile hop between DEN and SAN takes about 2.2 hours, and Frontier and Alaska are among the carriers we see on it. Fares start around $131 in recent searches.

Tips for finding a lower fare

  • Aim for May, Sep and Oct when demand to San Diego is softer.
  • Book carry-on only if you can. Basic fares from Frontier often add bag fees.
  • Look at one-way fares on Alaska and Frontier separately; mixing airlines can beat a round trip.

Airlines on this route

Frontier, Alaska, United

Things to see in San Diego

  • San Diego Zoo
  • Coronado Beach

Frequently asked questions

When is the cheapest time to fly from Denver to San Diego?

Fares on DEN to SAN are often lower in May, Sep and Oct. Prices move with demand, so compare a few dates on the partner site before you decide.

How long is the flight from DEN to SAN?

A nonstop flight takes about 2.2 hours. Itineraries with a connection take longer, depending on the layover.

Which airlines fly from Denver to San Diego?

Carriers we commonly see on this route include Frontier, Alaska and United. Schedules and availability change, so check current options when you search.

How far ahead should I book DEN to SAN?

For most domestic trips, booking about 1 to 3 months ahead gives a good balance of price and choice. Holiday travel is better booked earlier.

Is the price I see here the final price?

No. Fares shown on this page are indicative and change often. The final price, taxes and fees are shown on the partner site at booking.

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