United Cheap Flights from Seattle to San Diego: UA SEA→SAN

View HK$1,368 flight on Tue, 13 Jan 2026Opens in a new window
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Prices were available within the past 7 days and start at HK$1,368 for one-way flights and HK$1,594 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Wed, 3 Dec - Wed, 10 Dec
SEA
Seattle
SAN
San Diego
HK$1,594 Return, found 4 days ago
HK$1,594
Return
found 4 days ago
Select United flight, departing Wed, 3 Dec from Seattle to San Diego, returning Wed, 10 Dec, priced at HK$1,594 found 4 days ago
United
Wed, 3 Dec - Wed, 10 Dec
SEA
Seattle
SAN
San Diego
HK$1,629 Return, found 4 days ago
HK$1,629
Return
found 4 days ago
Select United flight, departing Wed, 3 Dec from Seattle to San Diego, returning Wed, 10 Dec, priced at HK$1,629 found 4 days ago
United
Wed, 3 Dec - Wed, 10 Dec
SEA
Seattle
SAN
San Diego
HK$1,862 Return, found 4 days ago
HK$1,862
Return
found 4 days ago
Select United flight, departing Wed, 3 Dec from Seattle to San Diego, returning Wed, 10 Dec, priced at HK$1,862 found 4 days ago
United
Wed, 3 Dec - Wed, 10 Dec
SEA
Seattle
SAN
San Diego
HK$1,897 Return, found 4 days ago
HK$1,897
Return
found 4 days ago
Select United flight, departing Wed, 3 Dec from Seattle to San Diego, returning Wed, 10 Dec, priced at HK$1,897 found 4 days ago
United
Wed, 3 Dec - Wed, 10 Dec
SEA
Seattle
SAN
San Diego
HK$1,905 Return, found 4 days ago
HK$1,905
Return
found 4 days ago
Select United flight, departing Wed, 3 Dec from Seattle to San Diego, returning Wed, 10 Dec, priced at HK$1,905 found 4 days ago
United
Wed, 3 Dec - Wed, 10 Dec
SEA
Seattle
SAN
San Diego
HK$1,940 Return, found 4 days ago
HK$1,940
Return
found 4 days ago
Select United flight, departing Wed, 3 Dec from Seattle to San Diego, returning Wed, 10 Dec, priced at HK$1,940 found 4 days ago
Seattle to San Diego route information
Origin airport
Seattle - Tacoma Intl.
Destination airport
San Diego Intl.
Distance
1681 km
Average flight time
2 hours 51 mins

Frequently asked questions

How much is a United Airlines flight from Seattle - Tacoma Intl. Airport (SEA) to San Diego Intl. Airport (SAN)?
You'll discover cheap return United Airlines flights from HK$1,594 from SEA to SAN by organising your results from "Price (lowest to highest)" on Expedia. Or look for options from HK$1,368 for a one-way trip.**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 SEA to SAN with United Airlines?
United Airlines flights to San Diego are often cheaper in the low-season months of January and November. Whether you're searching for a round-trip or one-way ticket, you could find a better deal then.
Does United Airlines fly nonstop from Seattle - Tacoma Intl. Airport (SEA) to San Diego Intl. Airport (SAN)?
Use our "Nonstop" filter when browsing for direct United Airlines flights from SEA to SAN. It's also a good way to compare other carriers servicing the same nonstop trip.
What airports does United Airlines fly into in San Diego?
Jump on a United Airlines flight from Seattle - Tacoma Intl. Airport (SEA) to San Diego, and you'll probably land at San Diego Intl. Airport (SAN). This is the airline's primary hub in this city.
Can I change or cancel my United Airlines flight from Seattle - Tacoma Intl. Airport (SEA) to San Diego Intl. Airport (SAN)?
Changes are usually free within 24 hours of booking, but your airline may charge a fee after that. For more details about altering your flights, head to your "Trips," select your flight and click on "Manage Booking." If you want the freedom to change your plans without additional costs, apply the "Changes included" and "No cancel fee" filters when planning your next break.
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