£89 Cheap Flights from Washington (IAD) to San Diego (SAN)

View £89 flight on Tue, 3 Jun 2025Opens in a new window

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Cheap Flights from Washington (IAD) to San Diego (SAN)

Prices were available within the past 7 days and start at £89 for one-way flights and £179 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
Sat, 17 May - Sat, 24 May
IAD
Washington
SAN
San Diego
£179 Return, found 4 days ago
£179
Return
found 4 days ago
Select Alaska Airlines flight, departing Sat, 17 May from Washington to San Diego, returning Sat, 24 May, priced at £179 found 4 days ago
Alaska Airlines
Sun, 25 May - Wed, 28 May
IAD
Washington
SAN
San Diego
£194 Return, found 4 days ago
£194
Return
found 4 days ago
Select Alaska Airlines flight, departing Sun, 25 May from Washington to San Diego, returning Wed, 28 May, priced at £194 found 4 days ago
Alaska Airlines
Wed, 4 Jun - Wed, 11 Jun
IAD
Washington
SAN
San Diego
£196 Return, found 5 days ago
£196
Return
found 5 days ago
Select Alaska Airlines flight, departing Wed, 4 Jun from Washington to San Diego, returning Wed, 11 Jun, priced at £196 found 5 days ago
Alaska Airlines
Sun, 25 May - Wed, 28 May
IAD
Washington
SAN
San Diego
£202 Return, found 4 days ago
£202
Return
found 4 days ago
Select Alaska Airlines flight, departing Sun, 25 May from Washington to San Diego, returning Wed, 28 May, priced at £202 found 4 days ago
Alaska Airlines
Sat, 7 Jun - Tue, 10 Jun
IAD
Washington
SAN
San Diego
£216 Return, found 2 days ago
£216
Return
found 2 days ago
Select Alaska Airlines flight, departing Sat, 7 Jun from Washington to San Diego, returning Tue, 10 Jun, priced at £216 found 2 days ago
Alaska Airlines
Sun, 25 May - Wed, 28 May
IAD
Washington
SAN
San Diego
£217 Return, found 4 days ago
£217
Return
found 4 days ago
Select Alaska Airlines flight, departing Sun, 25 May from Washington to San Diego, returning Wed, 28 May, priced at £217 found 4 days ago
Hawaiian Airlines
Thu, 3 Jul - Mon, 14 Jul
IAD
Washington
SAN
San Diego
£238 Return, found 2 days ago
£238
Return
found 2 days ago
Select Hawaiian Airlines flight, departing Thu, 3 Jul from Washington to San Diego, returning Mon, 14 Jul, priced at £238 found 2 days ago
Delta
Sun, 6 Jul - Thu, 17 Jul
IAD
Washington
SAN
San Diego
£284 Return, found 2 days ago
£284
Return
found 2 days ago
Select Delta flight, departing Sun, 6 Jul from Washington to San Diego, returning Thu, 17 Jul, priced at £284 found 2 days ago
American Airlines
Mon, 7 Jul - Thu, 17 Jul
IAD
Washington
SAN
San Diego
£314 Return, found 2 days ago
£314
Return
found 2 days ago
Select American Airlines flight, departing Mon, 7 Jul from Washington to San Diego, returning Thu, 17 Jul, priced at £314 found 2 days ago
United
Mon, 7 Jul - Thu, 17 Jul
IAD
Washington
SAN
San Diego
£321 Return, found 2 days ago
£321
Return
found 2 days ago
Select United flight, departing Mon, 7 Jul from Washington to San Diego, returning Thu, 17 Jul, priced at £321 found 2 days ago
Flight from Washington to San Diego route information
Origin airport
Washington Dulles Intl.
Destination airport
San Diego Intl.
Airlines serving
Alaska Airlines
Return price
£179
Distance
3598 km

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

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

The easiest way to view the best deals on flights from Washington to San Diego 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 Washington Dulles Intl. to San Diego Intl. start at just £179 and range up to £321.  

To find an even better deal, try  

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

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

We cater for all flight types, cabin classes and airlines. So whether you’re booking flights from Washington Dulles Intl. to San Diego 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.  

Frequently asked questions

How much is a flight from Dulles Intl. Airport to San Diego Airport?
The lowest price advertised for a round-trip journey from Dulles Intl. Airport to SAN is £179. But you better get a move on. This price is based on fares offered within the last 7 days on Expedia for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from Washington Dulles Intl. Airport (IAD) to San Diego Intl. Airport (SAN)?
We understand that circumstances change unexpectedly, so we’ve made it as easy as possible for you to cancel your flight online. Just head to the Customer Service Portal and follow the instructions.
How do I find cheap flights from IAD to San Diego Airport that have flexible change policies?
Many airlines offer the option to reschedule your flight without a change fee. All you pay is the difference between the original flight and the new flight. When you’re searching for Dulles Intl. Airport to San Diego Airport flights, you’ll see a “no change fees” filter for you to select.
How far is the flight from IAD to San Diego Airport?
The flying distance between Washington Dulles Intl. Airport (IAD) (IAD) and San Diego Airport (SAN) is 3,600 kilometres. Listen to some music or finish that novel and the trip will fly by.
Which airlines fly direct from IAD to SAN?
A favourite with many frequent flyers, United Airlines (UA) offers 91 flights every month from Washington Dulles Intl. Airport (IAD) to SAN. Pick the one that suits your travel plans and book your fare today.
Are Dulles Intl. Airport to San Diego Intl. Airport (SAN) flight tickets cheaper when they're purchased at the last minute?
Late planners can occasionally score a bargain, with some of the cheapest fares from Dulles Intl. Airport to San Diego Intl. Airport (SAN) appearing a few weeks before the date of departure. If you’d rather book ahead of time, Expedia compares and updates the best flight deals continuously — as early as 12 months in advance in some cases. It depends on the carrier though, as not all airlines publish prices that far in advance.

Explore a world of travel with Expedia

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