Seattle to Singapore Changi (SEA → SIN). We are tracking 7 fares on this route.
Cheapest tracked fare $393 · typical price $1,006 · you save about $613 (61%)
Cheapest fares we're tracking
Airline
Departs
Stops
Price
United Airlines
2026-10-04
2 stops
$393
Asiana Airlines
2026-10-07
1 stop
$413
Asiana Airlines
2026-11-10
1 stop
$413
Asiana Airlines
2026-11-11
1 stop
$413
Korean Air
2026-10-15
1 stop
$427
ANA
2026-11-12
1 stop
$433
Philippine Airlines
2026-10-06
1 stop
$489
Could you save more?
The airport you were going to fly from is often not the cheapest one. Compare every airport in a region against each other, or check whether a multi-day stopover beats the direct fare.
How cheap can flights from Seattle to Singapore Changi get?
The cheapest fare we have tracked on this route is $393, compared with a typical $1,006 for a trip of this distance.
Is it cheaper to fly to Singapore Changi from a different airport?
Often, yes. Fares out of secondary airports are frequently cheaper than the obvious hub, but they are the ones most likely to be missing from a normal search. Our reverse search compares every airport in a region against each other so the cheaper departure point is not hidden.
Could a stopover make Seattle to Singapore Changi cheaper?
Sometimes. On thin long-haul routes a two-leg trip with a multi-day stopover can beat the direct fare, and occasionally a direct fare is not sold at all. Our detour search prices those routings against the direct flight.