Cheap Flights from San Francisco to Washington D.C. from S$ 109

Frequently Asked Questions

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

  Based on Trip.com data, Frontier Airlines offers one-way fares as low as S$ 109 on Cheapest nonstop routes (e.g. SFO to IAD on Tue, Aug 25), while Frontier Airlines offers Cheapest nonstop round-trips from S$ 198 departing on Wed, Aug 12 and returning on Mon, Aug 17.

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

  At the moment, you can catch a direct flight from San Francisco to Washington D.C. with the following airlines, including: United Airlines 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 a flight from San Francisco (SFO) to Washington D.C. (WAS)?

  It takes about 5 hours 51 minutes to fly from San Francisco (SFO) to Washington D.C. (WAS).

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

  By analyzing data from all airlines on the Trip.com flight calendar, it looks like the best time to book a flight from San Francisco to Washington D.C. 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 San Francisco to Washington D.C.?

  Based on Trip.com data in the past 4 weeks, there is 77 flight per week flying from San Francisco to Washington D.C.. You can check the weekly schedule for popular airlines on this route below: United Airlines: S/M/T/W/T/F/S -- UA1678 (08:35) United Airlines: S/-/-/-/-/-/S -- UA2382 (08:21)

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

  To find best deals on flights from San Francisco to Washington D.C., 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, Aug 25, with one-way flights priced at just S$ 109.
  · 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 Washington D.C. travel is around July.
  · Get exclusive promo codes for Trip.com app users.

• When is the best time to book a flight from San Francisco to Washington D.C. to get the best price?

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

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

  After crunching the numbers on our August flight calendar, it's currently cheapest to fly from San Francisco to Washington D.C. on August 12, 2026 with Frontier Airlines, with prices starting at S$ 121.

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

  You can land at any one of the following hubs in Washington D.C., with San Francisco International Airport to Ronald Reagan Washington National Airport (SFO-DCA) is by far the most common option on this route: Ronald Reagan Washington National Airport (DCA) Dulles International Airport (IAD).

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

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

• How can I change or cancel my flight ticket from San Francisco to Washington D.C.?

  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.

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

  Based on Trip.com data for flights departing in the next 30 days, the average one-way fare from San Francisco to Washington D.C. is S$ 342. Fares vary by travel date, airline and availability.

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

  Based on Trip.com data for travel in the next 30 days, the average round-trip fare from San Francisco to Washington D.C. is S$ 657. The final price depends on the outbound and return dates, airline and fare conditions.

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

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

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

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