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Cheap flights from San Francisco to Washington, D.C. Dulles Intl Airport from £114

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 19/1. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — IAD
12 Oct — 19 Oct1
1 adult
1 adult, Economy

Cheapflights Tip: The best prices from San Francisco to Washington, D.C. Dulles Intl are usually found in July or May, booked 43 days in advance, depart on a Wednesday or Tuesday and return on a Monday

Cheap 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 12 September 2025.

Round-trip from

£198

One-way from

£114

Popular in

December

Cheapest in

July

Average price

£323

Good round-trip deal

£479 or less
Southwest
  • Southwest
  • 28/10-31/10
  • 3 total stops
  • 19h 40m total
  • San Francisco to Washington, D.C.
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Alaska Airlines
  • Alaska Airlines
  • 19/1
  • 1 total stop
  • 21h 55m total
  • San Francisco to Washington, D.C.
Search Deals
Highest demand for flights based on searches. 10% potential increase in price (£30 potential increase over avg. return price).
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Cheapest flight prices on average. 2% potential price decrease (£6 potential savings vs. average return price).
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Average for round-trip flights in September 2025
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Price to beat on a round-trip flight from San Francisco to Washington, D.C. Dulles Intl.
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Find flight deals from San Francisco to Dulles Intl

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 12 September 2025.

Tue 28/1008:00SFO - IAD
2 stops12h 05mSouthwest
Fri 31/1016:50IAD - SFO
1 stop7h 35mSouthwest
Deal found 12/9£198
Wed 5/1112:15SFO - IAD
1 stop6h 55mSouthwest
Sun 9/1105:05IAD - SFO
1 stop7h 25mSouthwest
Deal found 10/9£199
Fri 24/1005:00SFO - IAD
1 stop11h 00mSouthwest
Tue 28/1016:50IAD - SFO
1 stop8h 55mSouthwest
Deal found 11/9£200
Sun 7/1209:10SFO - IAD
1 stop11h 20mSouthwest
Wed 10/1216:40IAD - SFO
1 stop8h 10mSouthwest
Deal found 11/9£203
Tue 4/1116:39SFO - IAD
1 stop10h 44mAlaska Airlines
Mon 10/1117:40IAD - SFO
1 stop9h 06mAlaska Airlines
Deal found 11/9£204
Fri 17/1023:56SFO - IAD
Nonstop5h 19mUnited Airlines
Mon 20/1022:05IAD - SFO
Nonstop5h 50mUnited Airlines
Deal found 12/9£205
Fri 7/1113:45SFO - IAD
1 stop7h 55mDelta
Tue 18/1115:35IAD - SFO
1 stop8h 21mDelta
Deal found 9/9£206
Fri 7/1113:45SFO - IAD
1 stop7h 55mDelta
Thu 13/1107:15IAD - SFO
1 stop11h 42mDelta
Deal found 10/9£207
Wed 29/1008:00SFO - IAD
2 stops12h 05mSouthwest
Sun 2/1105:05IAD - SFO
1 stop7h 25mSouthwest
Deal found 12/9£210
Thu 6/1105:30SFO - IAD
1 stop10h 30mSouthwest
Mon 10/1117:50IAD - SFO
1 stop8h 05mSouthwest
Deal found 12/9£210

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 12 September 2025.
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

San Francisco

Fly to

Dulles Intl

Route

Depart

Return

Price

San FranciscoWashington, D.C.

SFO - IAD

SFOIAD

San Francisco

Tue 28/10

07:00-17:13

1 stop7h 13m

Washington, D.C. Dulles Intl

Thu 6/11

17:40-23:46

1 stop9h 06m

£204

San FranciscoWashington, D.C.

SFO - IAD

SFOIAD

San Francisco

Mon 20/10

00:35-11:26

1 stop7h 51m

Washington, D.C. Dulles Intl

Sat 25/10

07:35-16:05

1 stop11h 30m

£205

San FranciscoWashington, D.C.

SFO - IAD

SFOIAD

San Francisco

Fri 3/10

00:45-13:30

1 stop9h 45m

Washington, D.C. Dulles Intl

Tue 7/10

07:35-16:05

1 stop11h 30m

£205

San FranciscoWashington, D.C.

SFO - IAD

SFOIAD

San Francisco

Sun 26/10

00:35-11:26

1 stop7h 51m

Washington, D.C. Dulles Intl

Wed 29/10

06:05-10:33

1 stop7h 28m

£206

San FranciscoWashington, D.C.

SFO - IAD

SFOIAD

San Francisco

Sun 7/12

09:10-23:30

1 stop11h 20m

Washington, D.C. Dulles Intl

Wed 10/12

07:40-14:25

2 stops9h 45m

£207

San FranciscoWashington, D.C.

SFO - IAD

SFOIAD

San Francisco

Thu 6/11

13:25-23:33

1 stop7h 08m

Washington, D.C. Dulles Intl

Wed 12/11

11:50-18:09

1 stop9h 19m

£212

San FranciscoWashington, D.C.

SFO - IAD

SFOIAD

San Francisco

Fri 7/11

00:35-13:36

1 stop10h 01m

Washington, D.C. Dulles Intl

Mon 10/11

18:59-00:12

1 stop8h 13m

£212

San FranciscoWashington, D.C.

SFO - IAD

SFOIAD

San Francisco

Thu 8/1

14:30-17:25

1 stop23h 55m

Washington, D.C. Dulles Intl

Thu 15/1

18:55-09:11

1 stop17h 16m

£219

San FranciscoWashington, D.C.

SFO - IAD

SFOIAD

San Francisco

Thu 6/11

07:00-17:13

1 stop7h 13m

Washington, D.C. Dulles Intl

Mon 10/11

17:40-23:46

1 stop9h 06m

£219

San FranciscoWashington, D.C.

SFO - IAD

SFOIAD

San Francisco

Tue 6/1

22:35-06:47

Nonstop5h 12m

Washington, D.C. Dulles Intl

Fri 9/1

18:04-21:05

Nonstop6h 01m

£219

Flights are sorted by cheapest return flights first.

Deals found on 10/9

Showing 1-10 of 22 results
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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?

Use this chart to determine the optimal time to book a return flight from San Francisco to Dulles Intl. Price data was last updated on 29 August 2025.

Booking 43 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, January is the cheapest month in which you can book a flight from San Francisco to Washington, D.C. Dulles Intl Airport (average of £599). Flying from San Francisco to Washington, D.C. Dulles Intl Airport in July is currently the most expensive (average of £947). 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 12 September 2025.

Unlike in the afternoon, when flights are generally more expensive, you can save up to 61% on flights from San Francisco to Washington, D.C. Dulles Intl Airport by exploring options for tickets in the morning.

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 24 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 11.8 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 £204, Alaska Airlines can have you in Washington, D.C. Dulles Intl Airport from San Francisco in 7h 13m. 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 cheapest airlines to fly from San Francisco to Washington, D.C. Dulles Intl Airport one-way?

    To fly one-way, consider booking your trip with Alaska Airlines, which is currently one of the cheapest options available, starting at £114. Southwest flights start at £114 while deals on United Airlines start at £117 one-way.

  • 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 (86%), United Airlines (86%), Egyptair (83%).

  • 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 £426. While the most popular route (San Francisco - Washington, D.C. Dulles Intl) can be booked for £219 on average, our data indicates £479 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, January is the cheapest month in which you can book a flight from San Francisco to Washington, D.C. Dulles Intl Airport (average of £599). Flying from San Francisco to Washington, D.C. Dulles Intl Airport in July is currently the most expensive (average of £947). 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
Woodbridge
Arlington
College Park
Tysons

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 Dulles Intl flights
Los Angeles to Reagan-National flights

Fly with Cheapflights

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

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

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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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