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Cheap flights from San Francisco to Washington, D.C. Dulles Intl Airport from £148

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 18/11. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — IAD
31 Aug — 7 Sep1
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 August 2026.

Sun 13/912:07
SFO
-
IAD
2 stops19h 10m
Frontier
Sun 20/906:00
IAD
-
SFO
1 stop7h 55m
Frontier
Deal found 30/7£279
Tue 3/1121:30
SFO
-
IAD
1 stop9h 40m
Delta
Sat 7/1117:08
IAD
-
SFO
1 stop8h 20m
Delta
Deal found 29/7£280
Wed 2/905:36
SFO
-
IAD
1 stop8h 02m
Delta
Tue 8/907:25
IAD
-
SFO
1 stop29h 09m
Delta
Deal found 27/7£289
Fri 18/917:16
SFO
-
IAD
1 stop21h 58m
Alaska Airlines
Sat 5/1217:25
IAD
-
SFO
1 stop9h 14m
Alaska Airlines
Deal found 30/7£290
Fri 11/922:35
SFO
-
IAD
Nonstop5h 25m
United Airlines
Sat 12/909:45
IAD
-
SFO
Nonstop5h 45m
United Airlines
Deal found 28/7£291
Thu 17/910:29
SFO
-
IAD
1 stop9h 27m
Delta
Wed 23/918:47
IAD
-
SFO
1 stop8h 06m
Delta
Deal found 28/7£293
Tue 25/821:13
SFO
-
IAD
1 stop18h 01m
Alaska Airlines
Tue 1/907:00
IAD
-
SFO
1 stop8h 56m
Alaska Airlines
Deal found 27/7£294
Tue 15/908:10
SFO
-
IAD
Nonstop5h 12m
United Airlines
Wed 16/922:10
IAD
-
SFO
Nonstop5h 49m
United Airlines
Deal found 29/7£295
Tue 25/820:56
SFO
-
IAD
1 stop8h 08m
Frontier
Fri 28/808:59
IAD
-
SFO
1 stop13h 57m
Frontier
Deal found 29/7£296
Sat 29/808:00
SFO
-
IAD
1 stop9h 05m
Delta
Mon 21/907:25
IAD
-
SFO
1 stop19h 26m
Delta
Deal found 27/7£296
Fri 30/1016:43
SFO
-
IAD
1 stop22h 07m
Alaska Airlines
Sat 7/1118:40
IAD
-
SFO
1 stop8h 08m
Alaska Airlines
Deal found 29/7£297
Fri 30/1021:28
SFO
-
IAD
Nonstop5h 07m
United Airlines
Sat 31/1009:25
IAD
-
SFO
Nonstop6h 09m
United Airlines
Deal found 28/7£299

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 August 2026.

Round-trip from

£279

One-way from

£148

Popular in

June

Cheapest in

February

Average price

£395
Frontier
  • Frontier
  • 13/9-20/9
  • 3 total stops
  • 27h 05m total
  • San Francisco to Washington, D.C.
Search Deals
United Airlines
  • United Airlines
  • 16/9
  • Nonstop
  • 5h 25m total
  • San Francisco to Washington, D.C.
Search Deals
Highest demand for flights based on searches. 12% potential increase in price (£37 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (£6 potential savings vs. average return price).
Search Deals
Average for round-trip flights in August 2026
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 August 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

Tue 27/10

23:30-11:32

1 stop9h 02m

Washington, D.C. Dulles Intl

Sat 31/10

15:03-22:59

1 stop10h 56m

£280

San FranciscoWashington, D.C.

SFO - IAD

SFOIAD

San Francisco

Sat 12/9

07:08-18:14

1 stop8h 06m

Washington, D.C. Dulles Intl

Sat 12/9

19:47-08:46

1 stop15h 59m

£317

San FranciscoWashington, D.C.

SFO - IAD

SFOIAD

San Francisco

Fri 9/10

23:10-07:31

Nonstop5h 21m

Washington, D.C. Dulles Intl

Mon 12/10

22:10-00:59

Nonstop5h 49m

£325

San FranciscoWashington, D.C.

SFO - IAD

SFOIAD

San Francisco

Sat 5/9

23:15-10:04

1 stop7h 49m

Washington, D.C. Dulles Intl

Mon 7/9

07:00-12:14

1 stop8h 14m

£325

San FranciscoWashington, D.C.

SFO - IAD

SFOIAD

San Francisco

Wed 9/9

23:14-07:35

Nonstop5h 21m

Washington, D.C. Dulles Intl

Fri 11/9

06:42-09:30

Nonstop5h 48m

£332

San FranciscoWashington, D.C.

SFO - IAD

SFOIAD

San Francisco

Fri 16/10

17:45-05:40

1 stop8h 55m

Washington, D.C. Dulles Intl

Sat 24/10

07:02-19:31

2 stops15h 29m

£338
Fastest return journey

San FranciscoWashington, D.C.

SFO - IAD

SFOIAD

San Francisco

Tue 1/9

21:30-05:55

Nonstop5h 25m

Washington, D.C. Dulles Intl

Sat 5/9

08:35-11:12

Nonstop5h 37m

£347

San FranciscoWashington, D.C.

SFO - IAD

SFOIAD

San Francisco

Thu 24/12

13:00-17:51

1 stop25h 51m

Washington, D.C. Dulles Intl

Tue 5/1

17:25-23:39

1 stop9h 14m

£354

San FranciscoWashington, D.C.

SFO - IAD

SFOIAD

San Francisco

Sun 1/11

16:52-00:59

Nonstop5h 07m

Washington, D.C. Dulles Intl

Thu 5/11

12:35-15:44

Nonstop6h 09m

£369

San FranciscoWashington, D.C.

SFO - IAD

SFOIAD

San Francisco

Sat 5/9

18:21-05:40

1 stop8h 19m

Washington, D.C. Dulles Intl

Tue 8/9

07:00-17:22

2 stops13h 22m

£369

Flights are sorted by cheapest return flights first.

Deals found on 29/7

Showing 1-10 of 23 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 41 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 £287). Flying from San Francisco to Washington, D.C. Dulles Intl Airport in June is currently the most expensive (average of £438). 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 August 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?

Airfare is below average for this route at the moment.

San Francisco to Washington, D.C. Dulles Intl Airport flights typically cost between £310 and £465 in September.
The cheapest return price found within the last 5 days was £279 on Frontier (13 Sept–20 Sept).

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 £302, Delta can have you in Washington, D.C. Dulles Intl Airport from San Francisco in 5h 25m. 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: ITA Airways (100%), Austrian Airlines (80%), Brussels Airlines (80%).

  • 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 £287). Flying from San Francisco to Washington, D.C. Dulles Intl Airport in June is currently the most expensive (average of £438). 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
Gaithersburg
Oxon Hill
Hanover
Woodbridge
Alexandria
Sterling

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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 Dulles Intl flights
Los Angeles to Reagan-National 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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