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£142 Cheap Flights from San Francisco (SFO) to Washington (IAD)

View £142 flight on Wed, 2 Sept 2026Opens in a new window

Popular airlines from San Francisco International Airport (SFO) to Washington Dulles International Airport (IAD)

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Cheap Flights from San Francisco (SFO) to Washington (IAD)

Prices were available within the past 7 days and start at £142 for one-way flights and £284 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
Sat, 19 Sept - Tue, 29 Sept
SFO
San Francisco
IAD
Washington
£284 Return, found 15 hours ago
£284
Return
found 15 hours ago
Select Alaska Airlines flight, departing Sat, 19 Sept from San Francisco to Washington, returning Tue, 29 Sept, priced at £284 found 15 hours ago
Alaska Airlines
Wed, 26 Aug - Sat, 29 Aug
SFO
San Francisco
IAD
Washington
£289 Return, found 6 days ago
£289
Return
found 6 days ago
Select Alaska Airlines flight, departing Wed, 26 Aug from San Francisco to Washington, returning Sat, 29 Aug, priced at £289 found 6 days ago
Alaska Airlines
Wed, 16 Sept - Tue, 22 Sept
SFO
San Francisco
IAD
Washington
£294 Return, found 6 days ago
£294
Return
found 6 days ago
Select Alaska Airlines flight, departing Wed, 16 Sept from San Francisco to Washington, returning Tue, 22 Sept, priced at £294 found 6 days ago
Alaska Airlines
Wed, 26 Aug - Sat, 29 Aug
SFO
San Francisco
IAD
Washington
£298 Return, found 6 days ago
£298
Return
found 6 days ago
Select Alaska Airlines flight, departing Wed, 26 Aug from San Francisco to Washington, returning Sat, 29 Aug, priced at £298 found 6 days ago
Alaska Airlines
Sat, 19 Sept - Tue, 29 Sept
SFO
San Francisco
IAD
Washington
£299 Return, found 15 hours ago
£299
Return
found 15 hours ago
Select Alaska Airlines flight, departing Sat, 19 Sept from San Francisco to Washington, returning Tue, 29 Sept, priced at £299 found 15 hours ago
Alaska Airlines
Thu, 17 Sept - Wed, 30 Sept
SFO
San Francisco
IAD
Washington
£303 Return, found 1 day ago
£303
Return
found 1 day ago
Select Alaska Airlines flight, departing Thu, 17 Sept from San Francisco to Washington, returning Wed, 30 Sept, priced at £303 found 1 day ago
Alaska Airlines
Wed, 26 Aug - Sat, 29 Aug
SFO
San Francisco
IAD
Washington
£304 Return, found 6 days ago
£304
Return
found 6 days ago
Select Alaska Airlines flight, departing Wed, 26 Aug from San Francisco to Washington, returning Sat, 29 Aug, priced at £304 found 6 days ago
Alaska Airlines
Fri, 18 Sept - Tue, 22 Sept
SFO
San Francisco
IAD
Washington
£306 Return, found 5 days ago
£306
Return
found 5 days ago
Select Alaska Airlines flight, departing Fri, 18 Sept from San Francisco to Washington, returning Tue, 22 Sept, priced at £306 found 5 days ago
United
Tue, 11 Aug - Tue, 18 Aug
SFO
San Francisco
IAD
Washington
£599 Return, found 17 hours ago
£599
Return
found 17 hours ago
Select United flight, departing Tue, 11 Aug from San Francisco to Washington, returning Tue, 18 Aug, priced at £599 found 17 hours ago
Delta
Tue, 11 Aug - Tue, 18 Aug
SFO
San Francisco
IAD
Washington
£602 Return, found 17 hours ago
£602
Return
found 17 hours ago
Select Delta flight, departing Tue, 11 Aug from San Francisco to Washington, returning Tue, 18 Aug, priced at £602 found 17 hours ago

Alternative airports near Washington

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Ronald Reagan Washington National DCA. Cheapest and Closest option available. Average driving time to city centre is 8 minutes. Flights from £343
DCA
Ronald Reagan Washington National
CheapestClosest
Average driving time to city centre8 min
Flights from £343

Find the cheapest month to fly from San Francisco (SFO) to Washington (IAD)

January is typically the cheapest month to fly

From £100 - £256 per traveller.

Frequently asked questions

How much does a flight from San Francisco, CA (SFO-San Francisco Intl.) to Washington, DC (IAD-Washington Dulles Intl.) cost?
You can find one-way and return flights from MAN to GDZ with Expedia. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see our cheapest fares first, and use the Price Tracking tool to receive alerts when SFO to IAD ticket fares go up or down.
What is the cheapest month to fly from San Francisco, CA (SFO) to Washington, DC (IAD)?
The cheapest months to fly from San Francisco, CA (SFO) to Washington, DC (IAD) are typically during off-peak season when demand is low. Traveling in off-peak or shoulder months is usually a good way to secure cheap tickets, just remember to avoid flying during holidays if you are able to. Use the calendar view in your search to see which months have low fares on this route.
Which airlines fly direct from San Francisco, CA (SFO-San Francisco Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
Only one airline offers direct flights from San Francisco Intl. (SFO) to Washington Dulles Intl. (IAD).United operates 72 direct flights from San Francisco Intl. to Washington Dulles Intl. every week.
What is the cheapest airline that flies from San Francisco, CA (SFO-San Francisco Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
Sun Country Airlines is one of the cheapest airlines offering connecting return flights from San Francisco Intl. (SFO) to Washington Dulles Intl. (IAD), with tickets starting from around £256. United is one of the cheapest airlines offering nonstop return flights from San Francisco Intl. (SFO) to Washington Dulles Intl. (IAD), with tickets starting from around £392 for flights that can be booked for departure within the next year. These prices are per adult, for economy/coach class. Use Expedia's search tool to compare the prices and schedules of airlines that fly this route to find the best option for your plans and budget.
How do I find cheap flights from San Francisco, CA (SFO) to Washington, DC (IAD)?
To find a cheap flight from San Francisco, CA (SFO) to Washington, DC (IAD), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best time to fly from San Francisco, CA (SFO) to Washington, DC (IAD)?
The best time to fly is usually mid-week (Tuesday or Wednesday) and during early morning hours as flights tend to be cheaper, less crowded, and generally more on-time. Avoid major holidays and peak vacation seasons for smoother travel. Combining off-peak days and hours often gives the best combination of cost, comfort, and convenience.
What is the earliest flight from San Francisco, CA (SFO-San Francisco Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
The earliest flight from San Francisco, CA (SFO-San Francisco Intl.) to Washington, DC (IAD-Washington Dulles Intl.) typically departs around 12:05 AM local time. This service is operated by Delta. This is a seasonal service, active only in May. An early departure like this can help you make the most of your time at your destination. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
How long does it take to fly from San Francisco, CA (SFO-San Francisco Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
A non-stop flight from San Francisco, CA (SFO-San Francisco Intl.) to Washington, DC (IAD-Washington Dulles Intl.) typically takes around 5 hours 18 minutes. This route covers a distance of approximately 3,885 kilometers. If you opt for a flight with one stop, your journey will generally take longer, averaging about 7 hours 30 minutes. Flights with two or more stops usually take around 11 hours 18 minutes. Keep in mind that actual flight times can vary due to factors like wind patterns and air traffic.
Can you fly business or first class from San Francisco, CA (SFO) to Washington, DC (IAD)?
Select the "Business class" and "First class" filters when looking for San Francisco, CA (SFO) to Washington, DC (IAD) flights on Expedia. This is the easiest way to compare prices, routes and flight times for your trip.
How much is a business class flight from San Francisco, CA (SFO-San Francisco Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
A non-stop, one-way business class flight from San Francisco, CA (SFO-San Francisco Intl.) to Washington, DC (IAD-Washington Dulles Intl.) is usually around £916 - £1,132. Prices often fluctuate based on seasonality and how early you book. You may also be able to find a cheaper business class journey between SFO to IAD if you opt for a connecting flight.
How do I earn miles on a San Francisco, CA (SFO-San Francisco Intl.) to Washington, DC (IAD-Washington Dulles Intl.) flight with Expedia?
It's easy to earn miles on a San Francisco, CA (SFO-San Francisco Intl.) to Washington, DC (IAD-Washington Dulles Intl.) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for Washington, DC (IAD) from San Francisco, CA (SFO)?
From San Francisco Intl. (SFO), you can fly directly into Washington Dulles Intl. (IAD) in Washington. Some flights may connect through major hubs like Los Angeles Intl. (LAX), Portland Intl. (PDX), or San Diego Intl. (SAN) before reaching Washington. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from San Francisco, CA (SFO-San Francisco Intl.) to Washington, DC (IAD-Washington Dulles Intl.) at the last minute?
Typically, booking a last minute flight from San Francisco, CA (SFO-San Francisco Intl.) to Washington, DC (IAD-Washington Dulles Intl.) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a San Francisco, CA (SFO-San Francisco Intl.) to Washington, DC (IAD-Washington Dulles Intl.) flight and hotel package?
Securing a San Francisco, CA (SFO-San Francisco Intl.) to Washington, DC (IAD-Washington Dulles Intl.) flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from San Francisco, CA (SFO) to Washington, DC (IAD)?
If you booked your San Francisco, CA (SFO) to Washington, DC (IAD) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
San Francisco Intl.
Destination airport
Washington Dulles Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, United
Return price
£283
Distance
3862 km
Average flight time
9 hours 16 mins

Book with confidence

Compare flights from San Francisco to Washington easily and book with confidence

For travelling on business or for pleasure, Expedia makes it easy to book your flights from San Francisco to Washington. Operating between them flights per day, 20 airlines cover the route. And fly direct, getting you to Washington Dulles Intl. in just hours. If you have a preferred carrier, use our advanced search tool to find the right flight from San Francisco Intl. to Washington Dulles Intl..  

To make things even better, in the advanced search, you can also choose to fly economy, premium economy, business or first class, select your maximum number of stops, and pick your preferred departure and arrival time. You can also opt for refundable and direct flights. 

Grab a great deal on your flight from San Francisco Intl. (SFO) to Washington Dulles Intl. (IAD)

The easiest way to view the best deals on flights from San Francisco to Washington today is to enter your travel dates and hit search. From here, you can sort your results by price to see the cheapest flights first. Right now, return flights from San Francisco Intl. to Washington Dulles Intl. start at just £284 and range up to £602.  

To find an even better deal, try  

  • being flexible on your dates – midweek flights can be cheaper
  • looking for other airports near San Francisco and Washington
  • booking your flight during September, the cheapest month on this route
  • varying your flight times – early morning and late at night are sometimes cheaper 

Why you should book your San Francisco to Washington flight with Expedia!

We cater for all flight types, cabin classes and airlines. So whether you’re booking flights from San Francisco Intl. to Washington Dulles Intl. for a budget break or a business trip with a bit of pleasure thrown in, we make it easy to secure the seat that’s right for you.  

Thanks to our supersized inventory that offers great choice all in one place, you know you’ll get a great deal with Expedia. Especially if you bundle your flight together with your hotel, you will unlock amazing savings. For added peace of mind, you can choose flexible bookings or filter to find refundable options, so you won’t pay a fee to change your flight.  

Compare flights from San Francisco to Washington easily and book with confidence

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*Available to Expedia members.