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Cheap flights from San Francisco to Washington, D.C. Dulles Intl Airport from £146

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 3/10. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — IAD
31 May — 7 Jun1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from San Francisco to Dulles Intl

Enter your travel dates to find the best prices.

Cheapest flights from San Francisco to Dulles Intl
Explore the most affordable flight options available from San Francisco to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 1 May 2026.

Wed 6/523:59
SFO
-
IAD
1 stop8h 42m
Frontier
Wed 13/511:12
IAD
-
SFO
1 stop11h 22m
Frontier
Deal found 29/4£251
Thu 11/622:10
SFO
-
IAD
1 stop9h 12m
Frontier
Thu 18/616:32
IAD
-
SFO
1 stop9h 30m
Frontier
Deal found 27/4£264
Fri 5/623:59
SFO
-
IAD
1 stop13h 29m
United Airlines
Sat 6/620:21
IAD
-
SFO
Nonstop5h 54m
United Airlines
Deal found 27/4£290
Thu 8/1018:01
SFO
-
IAD
1 stop14h 39m
Sun Country Air
Sun 11/1012:40
IAD
-
SFO
1 stop7h 42m
Sun Country Air
Deal found 30/4£292
Sat 23/521:30
SFO
-
IAD
Nonstop5h 23m
United Airlines
Sun 24/508:30
IAD
-
SFO
Nonstop5h 39m
United Airlines
Deal found 27/4£304
Fri 17/707:50
SFO
-
IAD
1 stop7h 40m
Delta
Wed 19/807:10
IAD
-
SFO
1 stop11h 53m
Delta
Deal found 28/4£306
Thu 5/1118:18
SFO
-
IAD
1 stop13h 48m
Sun Country Air
Sun 8/1112:50
IAD
-
SFO
1 stop12h 59m
Sun Country Air
Deal found 30/4£307
Fri 29/521:30
SFO
-
IAD
Nonstop5h 23m
United Airlines
Wed 3/608:30
IAD
-
SFO
Nonstop5h 39m
United Airlines
Deal found 28/4£308
Fri 12/622:10
SFO
-
IAD
1 stop8h 49m
Frontier
Fri 19/616:32
IAD
-
SFO
1 stop9h 30m
Frontier
Deal found 28/4£311
Sat 23/512:33
SFO
-
IAD
2 stops16h 01m
Alaska Airlines
Wed 27/506:00
IAD
-
SFO
2 stops15h 01m
Alaska Airlines
Deal found 27/4£316
Wed 3/606:16
SFO
-
IAD
1 stop8h 26m
Alaska Airlines
Wed 3/619:37
IAD
-
SFO
1 stop16h 56m
Alaska Airlines
Deal found 28/4£318
Tue 23/623:05
SFO
-
IAD
Nonstop5h 25m
United Airlines
Mon 29/617:55
IAD
-
SFO
Nonstop5h 42m
United Airlines
Deal found 28/4£318

Find flight deals from San Francisco to Dulles Intl

Discover tips and strategies to find the most affordable flight options for your journey from San Francisco (SFO) to Dulles Intl (IAD). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 1 May 2026.

Round-trip from

£264

One-way from

£146

Popular in

April

Cheapest in

February

Average price

£318

Good round-trip deal

£480 or less
Frontier
  • Frontier
  • 11/6-18/6
  • 2 total stops
  • 18h 42m total
  • San Francisco to Washington, D.C.
Search Deals
Sun Country Air
  • Sun Country Air
  • 3/10
  • 1 total stop
  • 14h 25m total
  • San Francisco to Washington, D.C.
Search Deals
Highest demand for flights based on searches. 7% potential increase in price (£20 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£7 potential savings vs. average return price).
Search Deals
Average for round-trip flights in May 2026
Search Deals
Price to beat on a round-trip flight from San Francisco to Washington, D.C. Dulles Intl.
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from San Francisco to Dulles Intl that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 1 May 2026.
Use the filters below to find and compare flights from San Francisco to Washington, D.C. Dulles Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

San FranciscoWashington, D.C.

SFO - IAD

SFOIAD

San Francisco

Sat 23/5

12:33-07:34

2 stops16h 01m

Washington, D.C. Dulles Intl

Wed 27/5

06:00-21:31

2 stops18h 31m

£334
Fastest return journey

San FranciscoWashington, D.C.

SFO - IAD

SFOIAD

San Francisco

Fri 9/10

09:40-23:59

2 stops11h 19m

Washington, D.C. Dulles Intl

Sat 17/10

07:00-13:48

1 stop9h 48m

£369

San FranciscoWashington, D.C.

SFO - IAD

SFOIAD

San Francisco

Sat 23/5

06:15-22:55

2 stops13h 40m

Washington, D.C. Dulles Intl

Wed 27/5

16:30-22:10

1 stop8h 40m

£401

San FranciscoWashington, D.C.

SFO - IAD

SFOIAD

San Francisco

Mon 18/5

16:44-17:42

1 stop21h 58m

Washington, D.C. Dulles Intl

Fri 22/5

19:37-09:33

1 stop16h 56m

£410

San FranciscoWashington, D.C.

SFO - IAD

SFOIAD

San Francisco

Wed 17/6

13:51-06:39

2 stops13h 48m

Washington, D.C. Dulles Intl

Mon 22/6

19:49-09:52

1 stop17h 03m

£451

San FranciscoWashington, D.C.

SFO - IAD

SFOIAD

San Francisco

Fri 15/5

16:45-07:34

2 stops11h 49m

Washington, D.C. Dulles Intl

Thu 28/5

19:37-09:33

1 stop16h 56m

£462
Cheapest one-way

San FranciscoWashington, D.C.

SFO - IAD

SFOIAD

San Francisco

Wed 22/7

10:35-00:03

1 stop10h 28m

£162

San FranciscoWashington, D.C.

SFO - IAD

SFOIAD

San Francisco

Sat 30/5

08:25-20:02

1 stop8h 37m

£162

San FranciscoWashington, D.C.

SFO - IAD

SFOIAD

San Francisco

Sun 9/8

23:05-07:30

Nonstop5h 25m

£169

San FranciscoWashington, D.C.

SFO - IAD

SFOIAD

San Francisco

Fri 19/6

00:40-10:52

1 stop7h 12m

£185

Flights are sorted by cheapest return flights first.

Deals found on 29/4

Showing 1-10 of 17 resultsSorted by cheapest first
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Best time to book a flight from San Francisco to Dulles Intl

Have a flexible travel schedule? Discover the best time to fly to Dulles Intl from San Francisco with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from San Francisco to Washington, D.C. Dulles Intl Airport

How far ahead should I book a flight from San Francisco to Washington, D.C. Dulles Intl Airport?

Booking 77 days in advance of your planned departure date is, on average, the best time to get cheap flights from San Francisco to Washington, D.C. Dulles Intl Airport. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest month to book a flight from San Francisco to Washington, D.C. Dulles Intl Airport?

Currently, February is the cheapest month in which you can book a flight from San Francisco to Washington, D.C. Dulles Intl Airport (average of £286). Flying from San Francisco to Washington, D.C. Dulles Intl Airport in April is currently the most expensive (average of £426). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from SFO to IAD?

Find hourly flight availability from San Francisco to Dulles Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 1 May 2026.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from San Francisco to Washington, D.C. Dulles Intl Airport as you normally would.

How much does it cost for a return flight from San Francisco to Washington, D.C. Dulles Intl Airport?

Related info for your journey

Find useful and relevant information for your journey from San Francisco to Dulles Intl. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from San Francisco to Washington, D.C. Dulles Intl?

    San Francisco (SFO) is the airport you will fly out of if you book a flight from San Francisco to Washington, D.C. Dulles Intl. You should not have trouble finding flights to Washington, D.C. Dulles Intl from San Francisco; the airport handles an average of 23 outbound flights to Washington, D.C. Dulles Intl per day. You should also have plenty of airline options to choose from since 0 airlines have flights from the San Francisco airport to Washington, D.C. Dulles Intl. It is only a 11.0 mi journey to San Francisco (SFO) from San Francisco’s city center.

  • How long is the flight from San Francisco to Washington, D.C. Dulles Intl Airport?

    For as low as £308, United Airlines can have you in Washington, D.C. Dulles Intl Airport from San Francisco in 5h 23m. San Francisco and Washington, D.C. Dulles Intl Airport are separated by a distance of 2412 mi. This flight may include one or multiple stops.

  • What are the most reliable airlines from San Francisco to Washington, D.C. Dulles Intl Airport?

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from San Francisco to Washington, D.C. Dulles Intl Airport on time: Asiana Airlines (92%), Ethiopian Air (90%), United Airlines (89%).

  • What are the cheapest flights from San Francisco to Washington, D.C. Dulles Intl Airport?

    Looking at all options, your cheapest flight can be booked for £427. While the most popular route (San Francisco - Washington, D.C. Dulles Intl) can be booked for £364 on average, our data indicates £480 when flying from San Francisco to Washington, D.C. Dulles Intl Airport.

  • Can I find deals for flights from San Francisco to Dulles Intl that include hotel bookings?

    Yes. In addition to deals on San Francisco to Dulles Intl flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from San Francisco to Dulles Intl?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from San Francisco to Dulles Intl.

  • Can I find deals for business class flights from San Francisco to Dulles Intl?

    Yes. Cheapflights offers flight deals from San Francisco to Dulles Intl by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from San Francisco to Washington, D.C. Dulles Intl Airport?

    Currently, February is the cheapest month in which you can book a flight from San Francisco to Washington, D.C. Dulles Intl Airport (average of £286). Flying from San Francisco to Washington, D.C. Dulles Intl Airport in April is currently the most expensive (average of £426). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Travelling to a place near Washington, D.C. Dulles Intl Airport?

Book flights to Washington, D.C. Dulles Intl Airport if you plan to visit one of these locations
Silver Spring
Hanover
Oxon Hill
Gaithersburg
Woodbridge
Arlington
Alexandria
Sterling

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for San Francisco to Dulles Intl

See prices for flight routes from nearby airports that may be better suited for you.
Los Angeles to Reagan-National flights
Los Angeles to Dulles Intl flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from San Francisco to Dulles Intl?

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to Dulles Intl from San Francisco today with Cheapflights!

Why should you use Cheapflights to find cheap flight tickets from San Francisco to Dulles Intl?

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from San Francisco to Dulles Intl for you. Better yet — we are completely free to use.

Can Cheapflights find flights from San Francisco to Dulles Intl with no change fees?

Users can book flights with no change fees policies with our dedicated filters. Book flights from San Francisco to Dulles Intl flexibly with Cheapflights today.

Can Cheapflights notify me if prices for flights from San Francisco to Dulles Intl become cheaper?

Yes, Cheapflights offers price alerts on San Francisco to Dulles Intl flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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