Cheap Flights from Denver to San Diego from AU$ 40

Flight FAQs

• Which airlines offer the cheapest flights from Denver (DEN) to San Diego (SAN)?

  Based on Trip.com data, Frontier Airlines offers one-way fares as low as AU$ 40 on Cheapest nonstop routes (e.g. DEN to SAN on Fri, Jun 5), while Frontier Airlines offers Cheapest nonstop round-trips from AU$ 78 departing on Tue, May 19 and returning on Sat, May 23.

• Which airlines offer direct flights from Denver to San Diego?

  At the moment, you can catch a direct flight from Denver to San Diego with the following airlines, including: Alaska Airlines Selected airlines are based on historical data collected from flight bookings users made on Trip.com within the last 90 days.

• How long is the flights from Denver (DEN) to San Diego (SAN)?

  It takes about 2 hours 29 minutes to fly from Denver (DEN) to San Diego (SAN).

• When is the best time to book flights from Denver to San Diego?

  By analyzing data from all airlines on the Trip.com flight calendar, it looks like the best time to book a flight from Denver to San Diego is around 40 days (6 weeks) in advance, and the best time to fly is usually on Tuesday, Wednesday, and Saturday. Tuesday typically offers the cheapest flights for departure, while Saturday offers the best return deals.

• How many flights are there per week from Denver to San Diego?

  Based on Trip.com data in the past 4 weeks, there is 28 flight per week flying from Denver to San Diego. You can check the weekly schedule for popular airlines on this route below: Alaska Airlines: S/M/-/-/-/-/- -- AS3308 (06:46)

• How can I find the best deals on flights from Denver to San Diego?

  To find best deals on flights from Denver to San Diego, you can use various tools on Trip.com:
  · Be flexible with your travel dates to get the cheapest flight deal. Now the cheapest flight deal is on Fri, Jun 5, with one-way flights priced at just AU$ 40.
  · Compare airlines strategically. Budget carriers often provide the lowest base fares, while we found the most affordable airline currently operating on this route is Frontier Airlines.
  · Set up price alerts to easily monitor ticket prices without having to check every day.
  · Check Trip.com flight deals and promo codes frequently.
  · Avoid peak season unless you book very early. It seems the peak season for San Diego travel is around July.
  · Get exclusive promo codes for Trip.com app users.

• When is the best time to book a flight from Denver to San Diego to get the best price?

  The cheapest months to fly from Denver to San Diego is December, when demand for travel is lower.

• Which upcoming date is the cheapest for flights from Denver to San Diego?

  After crunching the numbers on our May flight calendar, it's currently cheapest to fly from Denver to San Diego on May 28, 2026 with Frontier Airlines, with prices starting at AU$ 40.

• Which airports can I fly through when travelling to San Diego from Denver?

  You can land at any one of the following hubs in San Diego, with Denver International Airport to San Diego International Airport (DEN-SAN) is by far the most common option on this route: McClellan-Palomar Airport (CLD) Marine Corps Air Station Miramar (NKX) San Diego International Airport (SAN).

• What is the time difference between Denver and San Diego?

  The time difference between San Diego and Denver is 1h.

• How can I change or cancel my flight ticket from Denver to San Diego?

  Tickets can only be changed or cancelled if permitted by airline policy. To submit a change or cancellation request, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and segment, and submit a request. Please note that additional charges may apply according to the airline ticket policy. However, if the flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For more details about change and cancellation policies, please check the customer support pages.