£153 Cheap Flights from San Francisco (SFO) to Washington (IAD)

View £153 flight on Wed, 16 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 £153 for one-way flights and £320 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
Thu, 20 Aug - Tue, 25 Aug
SFO
San Francisco
IAD
Washington
£320 Return, found 1 day ago
£320
Return
found 1 day ago
Select Alaska Airlines flight, departing Thu, 20 Aug from San Francisco to Washington, returning Tue, 25 Aug, priced at £320 found 1 day ago
Alaska Airlines
Thu, 20 Aug - Tue, 25 Aug
SFO
San Francisco
IAD
Washington
£323 Return, found 1 day ago
£323
Return
found 1 day ago
Select Alaska Airlines flight, departing Thu, 20 Aug from San Francisco to Washington, returning Tue, 25 Aug, priced at £323 found 1 day ago
Alaska Airlines
Wed, 2 Dec - Fri, 4 Dec
SFO
San Francisco
IAD
Washington
£337 Return, found 12 hours ago
£337
Return
found 12 hours ago
Select Alaska Airlines flight, departing Wed, 2 Dec from San Francisco to Washington, returning Fri, 4 Dec, priced at £337 found 12 hours ago
Alaska Airlines
Thu, 28 May - Wed, 3 Jun
SFO
San Francisco
IAD
Washington
£339 Return, found 3 days ago
£339
Return
found 3 days ago
Select Alaska Airlines flight, departing Thu, 28 May from San Francisco to Washington, returning Wed, 3 Jun, priced at £339 found 3 days ago
Alaska Airlines
Wed, 2 Dec - Fri, 4 Dec
SFO
San Francisco
IAD
Washington
£351 Return, found 12 hours ago
£351
Return
found 12 hours ago
Select Alaska Airlines flight, departing Wed, 2 Dec from San Francisco to Washington, returning Fri, 4 Dec, priced at £351 found 12 hours ago
Alaska Airlines
Wed, 2 Dec - Fri, 4 Dec
SFO
San Francisco
IAD
Washington
£352 Return, found 12 hours ago
£352
Return
found 12 hours ago
Select Alaska Airlines flight, departing Wed, 2 Dec from San Francisco to Washington, returning Fri, 4 Dec, priced at £352 found 12 hours ago
Alaska Airlines
Mon, 1 Jun - Wed, 10 Jun
SFO
San Francisco
IAD
Washington
£354 Return, found 3 days ago
£354
Return
found 3 days ago
Select Alaska Airlines flight, departing Mon, 1 Jun from San Francisco to Washington, returning Wed, 10 Jun, priced at £354 found 3 days ago
Alaska Airlines
Fri, 14 Aug - Sat, 22 Aug
SFO
San Francisco
IAD
Washington
£360 Return, found 6 days ago
£360
Return
found 6 days ago
Select Alaska Airlines flight, departing Fri, 14 Aug from San Francisco to Washington, returning Sat, 22 Aug, priced at £360 found 6 days ago
Alaska Airlines
Thu, 21 May - Sat, 30 May
SFO
San Francisco
IAD
Washington
£366 Return, found 6 days ago
£366
Return
found 6 days ago
Select Alaska Airlines flight, departing Thu, 21 May from San Francisco to Washington, returning Sat, 30 May, priced at £366 found 6 days ago
United
Fri, 22 May - Sun, 7 Jun
SFO
San Francisco
IAD
Washington
£405 Return, found 6 days ago
£405
Return
found 6 days ago
Select United flight, departing Fri, 22 May from San Francisco to Washington, returning Sun, 7 Jun, priced at £405 found 6 days ago

Frequently asked questions

How much does a flight from San Francisco, CA (SFO-San Francisco Intl.) to Washington, DC (IAD-Washington Dulles Intl.) cost?
One-way flights typically cost between £286 and £1,266 and return flights often range between £995 and £2,156. 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 the cheapest fares first, and use the Price Tracking tool to receive alerts when Anaa (AAA) to Toronto, ON (YYZ-Pearson Intl.) ticket fares go up or down.
What is the cheapest month to fly from San Francisco, CA (SFO-San Francisco Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
May is typically the cheapest month to fly from San Francisco, CA (SFO-San Francisco Intl.) to Washington, DC (IAD-Washington Dulles Intl.), with average return fares of approximately £564. This is about 11% lower than the average price throughout the year. May often sees lower prices as it's before the peak summer travel season. Other cheap months to fly from San Francisco, CA (SFO-San Francisco Intl.) to Washington, DC (IAD-Washington Dulles Intl.) include February and September.
Which airlines fly direct from San Francisco, CA (SFO-San Francisco Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
Enter SFO to IAD and your travel dates, then apply the 'Nonstop' filter to see only direct flights.
How do I find cheap flights from San Francisco, CA (SFO-San Francisco Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
To find a cheap flight from San Francisco, CA (SFO-San Francisco Intl.) to Washington, DC (IAD-Washington Dulles Intl.), 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 airline to fly with from San Francisco, CA (SFO-San Francisco Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
The best airline to fly with from San Francisco, CA (SFO-San Francisco Intl.) to Washington, DC (IAD-Washington Dulles Intl.) will differ from traveller to traveller. If you like to fly early, UA offers early morning flights. If price is the most important factor, UA typically offers the lowest fares. UA offers the most daily flights from San Francisco, CA (SFO-San Francisco Intl.) to Washington, DC (IAD-Washington Dulles Intl.), which is brilliant if flexibility is what you value most. The best carrier for this journey could also be the one you have a loyalty membership with, as flying with that airline or another airline within the same alliance could help you collect points or enjoy lounge access.
What is the best time to fly from San Francisco, CA (SFO-San Francisco Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
Based on booking data from the past year, the cheapest months to fly from San Francisco, CA (SFO-San Francisco Intl.) to Washington, DC (IAD-Washington Dulles Intl.) are typically May and September, with average return flights around £564. However, the most popular months for this route are March and December, which means you'll find plenty of flight options during those times. While there isn't a single month that is both the cheapest and most popular, May and September offer great value if you're looking for lower fares, while March and December provide more flexibility with schedules if popularity is your priority.
How many flights per day from San Francisco, CA (SFO-San Francisco Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
When flying from San Francisco International (SFO) to Washington Dulles International (IAD), you'll find approximately 10 nonstop flights per day. For even more choice, look at flights that include layovers, as there are around 172 connecting flights daily. Some common connection points include Los Angeles Intl. (LAX), Seattle - Tacoma Intl. (SEA), and O'Hare Intl. (ORD).
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 International Airport (SFO) to Washington Dulles International Airport (IAD) typically departs at approximately 12:05 AM local time. This flight is operated by Delta and is a seasonal service active in May. An early departure like this can help you maximise your time at your destination. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What day of the week has the most flights from San Francisco, CA (SFO-San Francisco Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
You'll typically find the most flights from San Francisco, CA (SFO-San Francisco Intl.) to Washington, DC (IAD-Washington Dulles Intl.) on a Monday, with around 83 flights available. This gives you plenty of options for your travel plans. Major airlines on this route include United Airlines, Alaska Airlines, and Delta Air Lines.
What are the most popular departure times for flights from San Francisco, CA (SFO-San Francisco Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
The most popular departure times for flights from San Francisco, CA (SFO-San Francisco Intl.) to Washington, DC (IAD-Washington Dulles Intl.) are in the late evening, from 9pm to midnight. Approximately 27% of passengers prefer this time window. Many major carriers, including United Airlines and Delta Air Lines, offer flights during this window. These times work well because you can maximise your day in San Francisco before your evening flight, and you'll arrive in Washington, DC, ready for the next day.
How long does it take to fly from San Francisco, CA (SFO-San Francisco Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
A nonstop flight from SFO to IAD typically takes around 5 hours 20 minutes, covering approximately 2,414 miles. Connecting flights on this route usually add 2 hours 10 minutes to your travel time. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from San Francisco, CA (SFO-San Francisco Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
Select the "Business class" and "First class" filters when looking for SFO to 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 £1,586 - £3,572. Prices often fluctuate based on seasonality and how early you book. You may also be able to find a cheaper business class journey between Anaa (AAA) (AAA) to Toronto, ON (YYZ-Pearson Intl.) (YYZ) 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 from San Francisco Intl. (SFO)?
From San Francisco Intl. (SFO), you can fly into Washington Dulles Intl. (IAD) and Ronald Reagan Washington National (DCA) in Washington. Some flights may connect through major hubs like Los Angeles Intl. (LAX), Portland Intl. (PDX), 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-San Francisco Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
If you booked your San Francisco, CA (SFO-San Francisco Intl.) to Washington, DC (IAD-Washington Dulles Intl.) 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
Return price
£320
Distance
3862 km
Average flight time
8 hours 21 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 £320 and range up to £410.  

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 August, 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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