Cheap Flights from Washington D.C. to San Diego from S$ 175

Frequently Asked Questions

• Which airlines offer the cheapest flights from Washington D.C. (WAS) to San Diego (SAN)?

  Based on Trip.com data, Frontier Airlines offers one-way fares as low as S$ 175 on Cheapest nonstop routes (e.g. IAD to SAN on Sat, Jun 27), while Frontier Airlines offers Cheapest nonstop round-trips from S$ 286 departing on Tue, Jul 21 and returning on Wed, Jul 29.

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

  At the moment, you can catch a direct flight from Washington D.C. to San Diego with the following airlines, including: American 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 a flight from Washington D.C. (WAS) to San Diego (SAN)?

  It takes about 5 hours 39 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 38 flight per week flying from Washington D.C. to San Diego. You can check the weekly schedule for popular airlines on this route below: American Airlines: S/M/T/W/T/F/S -- AA7509 (19:49)

• 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 Sat, Jun 27, with one-way flights priced at just S$ 175.
  · Compare airlines strategically. Budget carriers often provide the lowest base fares, while we found the most affordable airline currently operating on this route is Alaska 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 Washington D.C. to San Diego to get the best price?

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

• Which upcoming date is the cheapest for flights from Washington D.C. to San Diego?

  After crunching the numbers on our June flight calendar, it's currently cheapest to fly from Washington D.C. to San Diego on June 13, 2026 with Frontier Airlines, with prices starting at S$ 145.

• Which airports can I fly through when travelling to San Diego from Washington D.C.?

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

• What is the time difference between Washington D.C. and San Diego?

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

• How can I change or cancel my flight ticket from Washington D.C. 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.