United Cheap Flights from Washington to San Diego

View €153 flight on Sat, 10 Jan 2026Opens in a new window
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Prices were available within the past 7 days and start at €153 for one-way flights and €271 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Sat, 10 Jan - Sat, 17 Jan
IAD
Washington
SAN
San Diego
€271 Return, found 4 days ago
€271
Return
found 4 days ago
Select United flight, departing Sat, 10 Jan from Washington to San Diego, returning Sat, 17 Jan, priced at €271 found 4 days ago
United
Thu, 8 Jan - Sat, 10 Jan
IAD
Washington
SAN
San Diego
€287 Return, found 3 days ago
€287
Return
found 3 days ago
Select United flight, departing Thu, 8 Jan from Washington to San Diego, returning Sat, 10 Jan, priced at €287 found 3 days ago
United
Thu, 8 Jan - Sat, 10 Jan
IAD
Washington
SAN
San Diego
€296 Return, found 3 days ago
€296
Return
found 3 days ago
Select United flight, departing Thu, 8 Jan from Washington to San Diego, returning Sat, 10 Jan, priced at €296 found 3 days ago
United
Sat, 10 Jan - Sat, 17 Jan
IAD
Washington
SAN
San Diego
€300 Return, found 4 days ago
€300
Return
found 4 days ago
Select United flight, departing Sat, 10 Jan from Washington to San Diego, returning Sat, 17 Jan, priced at €300 found 4 days ago
United
Thu, 8 Jan - Sat, 10 Jan
IAD
Washington
SAN
San Diego
€304 Return, found 3 days ago
€304
Return
found 3 days ago
Select United flight, departing Thu, 8 Jan from Washington to San Diego, returning Sat, 10 Jan, priced at €304 found 3 days ago
United
Mon, 12 Jan - Sat, 17 Jan
IAD
Washington
SAN
San Diego
€305 Return, found 17 hours ago
€305
Return
found 17 hours ago
Select United flight, departing Mon, 12 Jan from Washington to San Diego, returning Sat, 17 Jan, priced at €305 found 17 hours ago

Find the cheapest month to fly from Washington (IAD) to San Diego (SAN)

October is typically the cheapest month to fly

From €150 - €265 per traveller.

Alternative airports near San Diego

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

Select flight to San Diego Intl. SAN. Cheapest and Closest option available. Average driving time to city centre is 5 minutes. Flights from €313
SAN
San Diego Intl.
CheapestClosest
Average driving time to city centre5 min
Flights from €313

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 €153 on Expedia couldn't be easier — just filter by "Price (lowest to highest)." Alternatively, check out our budget-friendly round-trip fares from €271 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

Origin airport
Washington Dulles Intl.
Destination airport
San Diego Intl.
Airlines serving
American Airlines, Delta, United
Popular airline
American Airlines
Distance
3598 km
Average flight time
3 hours 32 mins

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