Cheap Flights from Union from ฿2,595

View ฿2,595 flight on Tue, 21 Jul 2026Opens in a new window

Popular airlines from Union

  • Alaska Airlines

  • American Airlines

  • United

  • Delta

  • Southwest Airlines

  • Air Canada

  • Frontier Airlines

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Cheapest flights from Union

These prices were available within the past 7 days. Prices quoted are per person, return, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Wed, 15 Jul - Wed, 29 Jul
SEA
Seattle
SFO
San Francisco
฿5,160 Return, found 5 days ago
฿5,160
Return
found 5 days ago
Select Delta flight, departing Wed, 15 Jul from Seattle to San Francisco, returning Wed, 29 Jul, priced at ฿5,160 found 5 days ago
Delta
Thu, 20 Aug - Wed, 26 Aug
SEA
Seattle
SAN
San Diego
฿5,505 Return, found 3 hours ago
฿5,505
Return
found 3 hours ago
Select Delta flight, departing Thu, 20 Aug from Seattle to San Diego, returning Wed, 26 Aug, priced at ฿5,505 found 3 hours ago
Delta
Thu, 17 Sept - Wed, 23 Sept
SEA
Seattle
SFO
San Francisco
฿5,605 Return, found 2 days ago
฿5,605
Return
found 2 days ago
Select Delta flight, departing Thu, 17 Sept from Seattle to San Francisco, returning Wed, 23 Sept, priced at ฿5,605 found 2 days ago
United
Wed, 15 Jul - Wed, 29 Jul
SEA
Seattle
SFO
San Francisco
฿6,480 Return, found 5 days ago
฿6,480
Return
found 5 days ago
Select United flight, departing Wed, 15 Jul from Seattle to San Francisco, returning Wed, 29 Jul, priced at ฿6,480 found 5 days ago
Delta
Wed, 15 Jul - Wed, 29 Jul
SEA
Seattle
SFO
San Francisco
฿6,640 Return, found 5 days ago
฿6,640
Return
found 5 days ago
Select Delta flight, departing Wed, 15 Jul from Seattle to San Francisco, returning Wed, 29 Jul, priced at ฿6,640 found 5 days ago
American Airlines
Wed, 15 Jul - Wed, 29 Jul
SEA
Seattle
SFO
San Francisco
฿6,805 Return, found 5 days ago
฿6,805
Return
found 5 days ago
Select American Airlines flight, departing Wed, 15 Jul from Seattle to San Francisco, returning Wed, 29 Jul, priced at ฿6,805 found 5 days ago
Delta
Thu, 9 Jul - Tue, 14 Jul
SEA
Seattle
SFO
San Francisco
฿6,925 Return, found 2 days ago
฿6,925
Return
found 2 days ago
Select Delta flight, departing Thu, 9 Jul from Seattle to San Francisco, returning Tue, 14 Jul, priced at ฿6,925 found 2 days ago
Delta
Thu, 17 Sept - Wed, 23 Sept
SEA
Seattle
SFO
San Francisco
฿6,935 Return, found 2 days ago
฿6,935
Return
found 2 days ago
Select Delta flight, departing Thu, 17 Sept from Seattle to San Francisco, returning Wed, 23 Sept, priced at ฿6,935 found 2 days ago
Delta
Wed, 23 Sept - Thu, 24 Sept
SEA
Seattle
SFO
San Francisco
฿6,975 Return, found 6 days ago
฿6,975
Return
found 6 days ago
Select Delta flight, departing Wed, 23 Sept from Seattle to San Francisco, returning Thu, 24 Sept, priced at ฿6,975 found 6 days ago
Alaska Airlines
Thu, 22 Oct - Sat, 31 Oct
PAE
Seattle
SFO
San Francisco
฿10,090 Return, found 6 days ago
฿10,090
Return
found 6 days ago
Select Alaska Airlines flight, departing Thu, 22 Oct from Seattle to San Francisco, returning Sat, 31 Oct, priced at ฿10,090 found 6 days ago

Travel information

Flights from Union: Essential Travel Information

Cheapest flight from Union
฿5,160 (roundtrip)
Best airlines to fly from Union
Delta, United, American Airlines, Alaska Airlines
Cheapest month to fly from Union
July
Union IATA code
SEA
Union Country/State
Washington
Airline ticket deals from Union
฿5,160 - ฿10,090

 

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