$109 Cheap Flights from Washington (IAD) to San Francisco (SFO)

View $109 flight on Fri, Oct 3, 2025Opens in a new window

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

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

Prices were available within the past 7 days and start at $109 for one-way flights and $218 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Thu, Oct 2 - Sun, Oct 5
IAD
Washington
SFO
San Francisco
$218 Roundtrip, just found
$218
Roundtrip
just found
Select Frontier Airlines flight, departing Thu, Oct 2 from Washington to San Francisco, returning Sun, Oct 5, priced at $218 just found
Frontier Airlines
Mon, Sep 22 - Fri, Sep 26
IAD
Washington
SFO
San Francisco
$219 Roundtrip, found 2 hours ago
$219
Roundtrip
found 2 hours ago
Select Frontier Airlines flight, departing Mon, Sep 22 from Washington to San Francisco, returning Fri, Sep 26, priced at $219 found 2 hours ago
Frontier Airlines
Thu, Sep 11 - Fri, Sep 12
IAD
Washington
SFO
San Francisco
$220 Roundtrip, found 9 hours ago
$220
Roundtrip
found 9 hours ago
Select Frontier Airlines flight, departing Thu, Sep 11 from Washington to San Francisco, returning Fri, Sep 12, priced at $220 found 9 hours ago
Frontier Airlines
Fri, Sep 26 - Fri, Oct 3
IAD
Washington
SFO
San Francisco
$230 Roundtrip, found 13 hours ago
$230
Roundtrip
found 13 hours ago
Select Frontier Airlines flight, departing Fri, Sep 26 from Washington to San Francisco, returning Fri, Oct 3, priced at $230 found 13 hours ago
Frontier Airlines
Thu, Sep 25 - Sun, Oct 5
IAD
Washington
SFO
San Francisco
$232 Roundtrip, found 11 hours ago
$232
Roundtrip
found 11 hours ago
Select Frontier Airlines flight, departing Thu, Sep 25 from Washington to San Francisco, returning Sun, Oct 5, priced at $232 found 11 hours ago
Frontier Airlines
Thu, Oct 2 - Sun, Oct 12
IAD
Washington
SFO
San Francisco
$235 Roundtrip, found 11 hours ago
$235
Roundtrip
found 11 hours ago
Select Frontier Airlines flight, departing Thu, Oct 2 from Washington to San Francisco, returning Sun, Oct 12, priced at $235 found 11 hours ago
Alaska Airlines
Tue, Sep 30 - Fri, Oct 3
IAD
Washington
SFO
San Francisco
$258 Roundtrip, found 4 hours ago
$258
Roundtrip
found 4 hours ago
Select Alaska Airlines flight, departing Tue, Sep 30 from Washington to San Francisco, returning Fri, Oct 3, priced at $258 found 4 hours ago
Delta
Tue, Sep 30 - Sun, Oct 5
IAD
Washington
SFO
San Francisco
$273 Roundtrip, just found
$273
Roundtrip
just found
Select Delta flight, departing Tue, Sep 30 from Washington to San Francisco, returning Sun, Oct 5, priced at $273 just found
United
Wed, Sep 24 - Wed, Oct 1
IAD
Washington
SFO
San Francisco
$277 Roundtrip, just found
$277
Roundtrip
just found
Select United flight, departing Wed, Sep 24 from Washington to San Francisco, returning Wed, Oct 1, priced at $277 just found
American Airlines
Wed, Oct 22 - Tue, Oct 28
IAD
Washington
SFO
San Francisco
$297 Roundtrip, found 16 hours ago
$297
Roundtrip
found 16 hours ago
Select American Airlines flight, departing Wed, Oct 22 from Washington to San Francisco, returning Tue, Oct 28, priced at $297 found 16 hours ago

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

April is typically the cheapest month to fly

From $140 - $451 per traveler.

Graph displaying average flight prices per month

Alternative airports near San Francisco

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

Select flight to Norman Y. Mineta San Jose Intl. SJC. Cheapest option available. Average driving time to city center is 50 minutes. Flights from $337
SJC
Norman Y. Mineta San Jose Intl.
Cheapest
Average driving time to city center50 min
Flights from $337
Select flight to Oakland Intl. OAK. Average driving time to city center is 26 minutes. Flights from $482
OAK
Oakland Intl.
Average driving time to city center26 min
Flights from $482
Flights from Washington (IAD) to San Francisco (SFO)
Origin airport
Washington Dulles Intl.
Destination airport
San Francisco Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, Frontier Airlines, Southwest Airlines, Sun Country Airlines, United
Roundtrip price
$213
Distance
2413 mi
Average flight time
3 hours 15 mins

Washington to San Francisco Flights

The cheapest times to fly from Washington to San Francisco

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Washington to San Francisco are during the month of October. You can find some of the cheapest flights from Washington to San Francisco with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Washington to San Francisco

Sunday is one of the best days to book for cheap flights from Washington to San Francisco: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Washington to San Francisco

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Washington to San Francisco in 2025. You can also book with separate airlines for your outbound and return journeys, from $109 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Washington to San Francisco flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Washington to San Francisco airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Washington Dulles Intl. Airport (IAD) to San Francisco Intl. Airport (SFO) cost?
Get a cheap one-way flight from $109 or cheap return flight from $218 from Washington Dulles Intl. Airport (IAD) to San Francisco Intl. Airport (SFO) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight offers on this route.
What is the cheapest month to fly from Washington Dulles Intl. Airport (IAD) to San Francisco Intl. Airport (SFO)?
Flying in October is a good way to save, as it's the cheapest month for flights between IAD and SFO. You'll typically find the lowest prices during the off-season.
Which airlines fly direct from Washington Dulles Intl. Airport (IAD) to San Francisco Intl. Airport (SFO)?
Take a nonstop flight with United Airlines and head straight from Washington Dulles Intl. Airport (IAD) to San Francisco Intl. Airport (SFO).
What is the cheapest airline that flies from Washington Dulles Intl. Airport (IAD) to San Francisco Intl. Airport (SFO)?
Expedia's filter tool lets you easily compare different airlines, flight durations and fares all in one place. Customize the search to your preferences, then sort by "Price (lowest to highest)" to find out which carrier offers the cheapest IAD to SFO flight.
How many flights per day from Washington Dulles Intl. Airport (IAD) to San Francisco Intl. Airport (SFO)?
When jetting out of Washington Dulles Intl. Airport (IAD), you'll have your pick from an average of 5 daily direct flights to San Francisco Intl. Airport (SFO).
What are the most popular departure times for flights from Washington Dulles Intl. Airport (IAD) to San Francisco Intl. Airport (SFO)?
More travelers fly between IAD and SFO at 2 PM than at any other point in the day. Looking for a quieter experience? Pick a flight outside the busiest times and you could save on your fare as well.
What day of the week has the most flights from IAD to SFO?
Friday has the most flights from Washington Dulles Intl. Airport (IAD) to San Francisco Intl. Airport (SFO). Consider leaving on this day and you'll have a greater chance of finding a departure that works with your plans.
What is the earliest flight from Washington Dulles Intl. Airport (IAD) to San Francisco Intl. Airport (SFO)?
Washington Dulles Intl. Airport (IAD)'s earliest flight to San Francisco Intl. Airport (SFO) is at approximately 6:32AM UTC-5. With a total journey time of 6h 8m, you'll land at around 9:40AM UTC-8.
How long does it take to fly from Washington Dulles Intl. Airport (IAD) to San Francisco Intl. Airport (SFO)?
Flights from IAD to SFO have an average travel time of 6 hours and 6 minutes. The distance between these two airports is 2,400 mi.
What airline has the least delays from IAD to SFO?
With 81% of flights usually landing on schedule, United Airlines has the best on-time performance for nonstop flights from Washington Dulles Intl. Airport (IAD) to San Francisco Intl. Airport (SFO). To check your flight status and receive notifications about any changes, use the Expedia App.
What is the best time to fly from Washington Dulles Intl. Airport (IAD) to San Francisco Intl. Airport (SFO)?
Opt for a flight from Washington Dulles Intl. Airport (IAD) to San Francisco Intl. Airport (SFO) that takes off before 3 PM to reduce the likelihood of delays and cancellations. Departures after this hour are on average 22% more likely to be canceled.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports do you fly into for San Francisco from Washington Dulles Intl. Airport (IAD)?
San Francisco Intl. Airport (SFO) is the only airport in San Francisco with direct flights from Washington Dulles Intl. Airport (IAD). Compare the available options and find affordable fares on Expedia.
Is it cheaper to buy a plane ticket from Washington Dulles Intl. Airport (IAD) to San Francisco Intl. Airport (SFO) last-minute?
Waiting until just before your trip to book your flight from IAD to SFO often results in higher prices. While it's possible to find some last-minute offers, they're not always guaranteed. Keep your travel schedule open for the best chance of snagging a bargain.
Is it cheaper to book an IAD to SFO flight and hotel package?
You'll typically save money by securing an IAD to SFO flight and hotel package compared to booking separately. In fact, travelers could save hundreds of dollars by bundling with Expedia. And it's easy to manage it all in one convenient place. After selecting your ideal accommodations and flights, consider adding extras like tours, activities and car rentals.
Can I cancel or change the date of my flight from Washington Dulles Intl. Airport (IAD) to San Francisco Intl. Airport (SFO)?
It's usually possible to reschedule or cancel your IAD to SFO flight. However, if the booking was made more than 24 hours ago, additional fees may apply. Refer to your airline's policies in your itinerary to see what changes are possible and whether any costs are involved. You'll also find more information on our Customer Service portal.

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*Available to One Key members.