฿5,385 Cheap United flights from Washington to San Diego (IAD→SAN)

View ฿5,385 flight on Wed, 4 Mar 2026Opens in a new window

  • Be in the know

    Get alerts if flight prices drop or rise*

  • Book smarter

    Save up to 40% on select hotels after you book a flight*

  • Earn twice

    Earn your airline miles on top of our rewards
    Sign in

United flights from Washington to San Diego (IAD→SAN)

Prices were available within the past 7 days and start at ฿5,385 for one-way flights and ฿13,960 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Wed, 4 Mar - Sun, 8 Mar
IAD
Washington
SAN
San Diego
฿13,960 Return, found 6 days ago
฿13,960
Return
found 6 days ago
Select United flight, departing Wed, 4 Mar from Washington to San Diego, returning Sun, 8 Mar, priced at ฿13,960 found 6 days ago
United
Wed, 4 Mar - Sun, 8 Mar
IAD
Washington
SAN
San Diego
฿14,275 Return, found 6 days ago
฿14,275
Return
found 6 days ago
Select United flight, departing Wed, 4 Mar from Washington to San Diego, returning Sun, 8 Mar, priced at ฿14,275 found 6 days ago
United
Wed, 4 Mar - Sun, 8 Mar
IAD
Washington
SAN
San Diego
฿14,310 Return, found 6 days ago
฿14,310
Return
found 6 days ago
Select United flight, departing Wed, 4 Mar from Washington to San Diego, returning Sun, 8 Mar, priced at ฿14,310 found 6 days ago
United
Wed, 4 Mar - Sun, 8 Mar
IAD
Washington
SAN
San Diego
฿14,435 Return, found 6 days ago
฿14,435
Return
found 6 days ago
Select United flight, departing Wed, 4 Mar from Washington to San Diego, returning Sun, 8 Mar, priced at ฿14,435 found 6 days ago
United
Wed, 4 Mar - Sun, 8 Mar
IAD
Washington
SAN
San Diego
฿14,625 Return, found 6 days ago
฿14,625
Return
found 6 days ago
Select United flight, departing Wed, 4 Mar from Washington to San Diego, returning Sun, 8 Mar, priced at ฿14,625 found 6 days ago
United
Wed, 4 Mar - Sun, 8 Mar
IAD
Washington
SAN
San Diego
฿14,755 Return, found 6 days ago
฿14,755
Return
found 6 days ago
Select United flight, departing Wed, 4 Mar from Washington to San Diego, returning Sun, 8 Mar, priced at ฿14,755 found 6 days ago

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 ฿11,560
SAN
San Diego Intl.
CheapestClosest
Average driving time to city centre5 min
Flights from ฿11,560

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

September is typically the cheapest month to fly

From ฿5,612 - ฿10,221 per traveller.

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 ฿5,385 on Expedia couldn't be easier — just filter by "Price (lowest to highest)." Alternatively, check out our budget-friendly round-trip fares from ฿13,960 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.
Distance
3598 km
Average flight time
3 hours 33 mins
*Available to Expedia members.