Photo by Zachary Williams

Popular airlines to Union
- Alaska Airlines
Alaska Airlines
- Delta
Delta
- American Airlines
American Airlines
- United
United
- Southwest Airlines
Southwest Airlines
- Frontier Airlines
Frontier Airlines
- Air Canada
Air Canada
- Be in the knowGet alerts if flight prices drop or rise*
- Book smarterSave up to 45% on select hotels after you book a flight*
How much is the cheapest flight to Union?
Prices were available within the past 7 days and start at NT$9,740 for one-way flights and NT$9,208 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Fri, Feb 13 - Sun, Feb 22
NRT
Tokyo
SEA
Seattle
NT$9,208 Roundtrip, found 1 day ago
NT$9,208
Roundtrip
found 1 day ago

Sat, Jan 31 - Wed, Feb 11
ICN
Seoul
SEA
Seattle
NT$17,421 Roundtrip, found 11 hours ago
NT$17,421
Roundtrip
found 11 hours ago

Thu, Feb 12 - Sun, Feb 22
NRT
Tokyo
SEA
Seattle
NT$18,790 Roundtrip, found 1 day ago
NT$18,790
Roundtrip
found 1 day ago

Tue, Mar 31 - Wed, Apr 1
TPE
Taipei
SEA
Seattle
NT$18,840 Roundtrip, just found
NT$18,840
Roundtrip
just found

Tue, Jan 20 - Thu, Feb 5
TPE
Taipei
SEA
Seattle
NT$19,356 Roundtrip, found 5 days ago
NT$19,356
Roundtrip
found 5 days ago
Frequently asked questions
Destination airport | Seattle - Tacoma Intl. |
|---|---|
Destination airport IATA code | SEA |
Destination city name | Seattle |
Roundtrip price | NT$3,026 |
Trending flights to Union
Prices were available within the past 7 days and start at NT$9,740 for one-way flights and NT$9,208 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Sat, Jan 31 - Sat, Jan 31
TPE
Taipei
SEA
Seattle
NT$18,691 Roundtrip, found 6 days ago
NT$18,691
Roundtrip
found 6 days ago
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From Other Airports to Union
- Chicago to Seattle (ORD - SEA)
- Newark Liberty Intl. Airport to Seattle (EWR - SEA)
- San Diego to Seattle (SAN - SEA)
- Los Angeles to Seattle (LAX - SEA)
- Taipei to Seattle (TSA - SEA)
- Hong Kong to Seattle (HKG - SEA)
- Taipei to Seattle (TPE - SEA)
- Kaohsiung to Seattle (KHH - SEA)
- Charlotte to Seattle (CLT - SEA)
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Flights to Cities Near Union
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