Cheap Flights from Washington D.C. to San Diego from $137

Frequently Asked Questions

• What are the cheapest flights from Washington D.C. to San Diego (WAS-SAN)?

  Based on Trip.com data, Frontier Airlines offers one-way fares as low as $137 on Cheapest nonstop routes (e.g. DCA to SAN on Tue, Oct 6), while Frontier Airlines offers Cheapest nonstop round-trips from $175 departing on Sun, Sep 6 and returning on Sun, Sep 13.

• Which airlines offer direct flights from Washington D.C. to San Diego?

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

• How long does it take to fly from Washington D.C. (WAS) to San Diego (SAN) and what is the distance?

  It takes around 6 hours 31 minutes to fly from Washington D.C. (WAS) to San Diego (SAN).

• When is the best time to book flights from Washington D.C. 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 Washington D.C. 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 Washington D.C. to San Diego?

  Based on Trip.com data in the past 4 weeks, there is 36 flight per week flying from Washington D.C. to San Diego. You can check the weekly schedule for popular airlines on this route below: Alaska Airlines: S/M/T/W/T/F/S -- AS015 (11:18) United Airlines: S/-/T/W/T/F/S -- UA1930 (09:17)

• How can I find the best deals on flights from Washington D.C. to San Diego?

  To find best deals on flights from Washington D.C. 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 Tue, Oct 6, with one-way flights priced at just $137.
  · 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 are flight tickets from Washington D.C. (WAS) to San Diego (SAN) the cheapest?

  The cheapest months to fly from Washington D.C. to San Diego is November, when demand for travel is lower.

• Which upcoming date is cheapest to fly from Washington D.C. to San Diego on?

  After crunching the numbers on our September flight calendar, it's currently cheapest to fly from Washington D.C. to San Diego on September 5, 2026 with Frontier Airlines, with prices starting at $175.

• Which airports can I fly into San Diego from Washington D.C.?

  You can arrive at any of the following airports in San Diego: San Diego International Airport (SAN), McClellan-Palomar Airport (CLD), and Marine Corps Air Station Miramar (NKX). Flights from Dulles International Airport to San Diego International Airport (IAD-SAN) are by far the most popular option for this route.

• Is there any time difference between Washington D.C. and San Diego?

  The time difference between San Diego and Washington D.C. is 3h.

• How do I change or cancel my ticket from Washington D.C. to San Diego?

  Tickets can only be changed or canceled 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.

• What is the average cost of a one-way flight from Washington D.C. to San Diego?

  Based on Trip.com data for flights departing in the next 30 days, the average one-way fare from Washington D.C. to San Diego is $268. Fares vary by travel date, airline and availability.

• What is the average cost of a round-trip flight from Washington D.C. to San Diego?

  Based on Trip.com data for travel in the next 30 days, the average round-trip fare from Washington D.C. to San Diego is $499. The final price depends on the outbound and return dates, airline and fare conditions.

• How do I book flights from Washington D.C. to San Diego on Trip.com?

  Enter Washington D.C. and San Diego, choose your travel dates and passengers, then compare flights by price, duration and baggage. Select a fare, review the change and cancellation rules, enter traveler details and complete payment to receive your confirmation.

• Are there budget airlines on the Washington D.C. to San Diego route?

  Frontier Airlinesare the most popular budget airlines flying from Washington D.C. to San Diego. Check baggage, seat and payment fees before comparing the final price.