United Cheap Flights from Washington to San Diego

View €152 flight on Sat, 11 Oct 2025Opens in a new window

  • Plan, book, fly with confidence

  • trending down icon

    Be in the know

    Get alerts if flight prices drop or rise*
  • bex rewards loyalty icon

    Book smarter

    Save up to 15% on select hotels after you book a flight*
  • payments icon

    Earn twice

    Earn your airline miles on top of our rewards
    Sign in

Prices were available within the past 7 days and start at €152 for one-way flights and €269 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Sat, 11 Oct - Sat, 18 Oct
IAD
Washington
SAN
San Diego
€269 Return, found 1 day ago
€269
Return
found 1 day ago
Select United flight, departing Sat, 11 Oct from Washington to San Diego, returning Sat, 18 Oct, priced at €269 found 1 day ago
United
Sat, 11 Oct - Sat, 18 Oct
IAD
Washington
SAN
San Diego
€286 Return, found 1 day ago
€286
Return
found 1 day ago
Select United flight, departing Sat, 11 Oct from Washington to San Diego, returning Sat, 18 Oct, priced at €286 found 1 day ago
United
Mon, 3 Nov - Thu, 6 Nov
IAD
Washington
SAN
San Diego
€286 Return, found 1 day ago
€286
Return
found 1 day ago
Select United flight, departing Mon, 3 Nov from Washington to San Diego, returning Thu, 6 Nov, priced at €286 found 1 day ago
United
Mon, 3 Nov - Thu, 6 Nov
IAD
Washington
SAN
San Diego
€294 Return, found 1 day ago
€294
Return
found 1 day ago
Select United flight, departing Mon, 3 Nov from Washington to San Diego, returning Thu, 6 Nov, priced at €294 found 1 day ago
United
Mon, 3 Nov - Thu, 6 Nov
IAD
Washington
SAN
San Diego
€302 Return, found 1 day ago
€302
Return
found 1 day ago
Select United flight, departing Mon, 3 Nov from Washington to San Diego, returning Thu, 6 Nov, priced at €302 found 1 day ago
United
Sat, 11 Oct - Sat, 18 Oct
IAD
Washington
SAN
San Diego
€320 Return, found 1 day ago
€320
Return
found 1 day ago
Select United flight, departing Sat, 11 Oct from Washington to San Diego, returning Sat, 18 Oct, priced at €320 found 1 day ago

Frequently asked questions

How much is a United Airlines flight from Washington Dulles Intl. Airport (IAD) to San Diego Intl. Airport (SAN)?
Scoring cheap one-way United Airlines flights from IAD to SAN from €152 on Expedia couldn't be easier — just filter by "Price (lowest to highest)." Alternatively, check out our budget-friendly round-trip fares from €269 for your next exciting getaway.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.
What is the cheapest month to fly from IAD to SAN with United Airlines?
Search for return or one-way flights to San Diego in January or November. You could find an affordable fare with United Airlines during these off-peak months.
Does United Airlines fly nonstop from Washington Dulles Intl. Airport (IAD) to San Diego Intl. Airport (SAN)?
Skip the layovers and fly from Washington Dulles Intl. Airport (IAD) to San Diego Intl. Airport (SAN) on one of United Airlines's 21 weekly direct flights. Apply Expedia's "Nonstop" and "Airline" filters to find the United Airlines flight that'll get you to SAN at your preferred time.
How long does it take to fly from IAD to SAN with United Airlines?
On average, it takes 5h 37m to fly nonstop from Washington Dulles Intl. Airport (IAD) to San Diego Intl. Airport (SAN) with United Airlines.
Which day of the week has the most United Airlines flights from Washington Dulles Intl. Airport (IAD) to San Diego Intl. Airport (SAN)?
United Airlines operates the most flights from Washington Dulles Intl. Airport (IAD) to San Diego Intl. Airport (SAN) on Thursday. With up to 3 daily departures, you'll get the most choice and flexibility on this day.
What airports does United Airlines fly into in San Diego?
San Diego Intl. Airport (SAN) is the primary San Diego gateway for United Airlines flights from Washington Dulles Intl. Airport (IAD).
What type of plane does United Airlines fly from Washington Dulles Intl. Airport (IAD) to San Diego Intl. Airport (SAN)?
You'll likely be on a Boeing 777 or a Boeing 737-900 when flying United Airlines from Washington Dulles Intl. Airport (IAD) to San Diego Intl. Airport (SAN). However, keep in mind that a different plane could be assigned to your route depending on operational reasons.
Can I change or cancel my United Airlines flight from Washington Dulles Intl. Airport (IAD) to San Diego Intl. Airport (SAN)?
Changes are typically free within 24 hours of making your booking, but your airline may add a charge after that. For more details about altering your flights, go to your "Trips," select your flight and click on "Manage Booking." If you want the freedom to update your itinerary without being charged, tick the "Changes included" or "No cancel fee" filter when organising your next adventure.

Travel information

Travel information

Origin airport
Washington Dulles Intl.
Destination airport
San Diego Intl.
Airlines serving
American Airlines, Delta, United
Popular airline
United
Distance
3598 km
Average flight time
2 hours 58 mins

Explore a world of travel with Expedia

Explore a world of travel with Expedia

*Available to Expedia members.