Seattle / Tacoma (SEA) to Singapore (SIN) flight deal in economy from $405

UAUnited Airlines

One Way•Economy

SEA

Seattle–Tacoma International Airport

Seattle / Tacoma, United States

SIN

Singapore Changi Airport

Singapore, Singapore

$573 USD

-29%$405 USD

Verified about 1 hour ago

September 2026

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Good Availability

54% of dates checked are available within 10% of the lowest price

Sunday, September 13th, 2026

Outbound Flights

21h 55m·1 stop

$405 USD

SEASep 13 17:20

→

SFOSep 13 19:42

UA 737Boeing 737MAX 9 Passenger

2h 58m layover

SFOSep 13 22:40

→

SINSep 15 06:15

UA 1Boeing 787

23h 10m·1 stop

$410 USD

SEASep 13 16:30

→

HNDSep 14 19:00

NH 117Boeing 787

5h 40m layover·Overnight

HNDSep 15 00:40

→

SINSep 15 06:40

NH 843Boeing 787

32h·1 stop

$417 USD

SEASep 13 19:35

→

SFOSep 13 21:57

UA 656Boeing 737MAX 9 Passenger

12h 43m layover·Overnight

SFOSep 14 10:40

→

SINSep 15 18:35

UA 29Boeing 787

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