United flights to Singapore from Seattle

View S$498 flight on Thu, 2 Oct, 2025Opens in a new window

  • Plan, book, fly with confidence

  • trending down icon

    Be in the know

    Get alerts if flight prices drop or rise*
  • bex rewards loyalty icon

    Book smarter

    Save up to 40% on select hotels after you book a flight*
  • payments icon

    Earn twice

    Earn your airline miles on top of our rewards
    Sign in

United flights from Seattle to Singapore (SEA→SIN)

Prices were available within the past 7 days and start at S$498 for one-way flights and S$957 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Sun, 7 Sep - Tue, 23 Sep
SEA
Seattle
SIN
Singapore
S$957 Return, found 4 hours ago
S$957
Return
found 4 hours ago
Select United flight, departing Sun, 7 Sep from Seattle to Singapore, returning Tue, 23 Sep, priced at S$957 found 4 hours ago
United
Thu, 18 Sep - Thu, 2 Oct
SEA
Seattle
SIN
Singapore
S$963 Return, found 6 hours ago
S$963
Return
found 6 hours ago
Select United flight, departing Thu, 18 Sep from Seattle to Singapore, returning Thu, 2 Oct, priced at S$963 found 6 hours ago
United
Mon, 8 Sep - Wed, 24 Sep
SEA
Seattle
SIN
Singapore
S$967 Return, found 11 hours ago
S$967
Return
found 11 hours ago
Select United flight, departing Mon, 8 Sep from Seattle to Singapore, returning Wed, 24 Sep, priced at S$967 found 11 hours ago
Seattle to Singapore route information
Origin airport
Seattle - Tacoma Intl.
Destination airport
Changi
Airlines serving
Air Canada, Air France, All Nippon Airways, American Airlines, British Airways, Cathay Pacific, Delta, EVA Airways, Emirates, Japan Airlines, KLM, Korean Air, Lufthansa, Malaysia Airlines, Philippine Airlines, Qatar Airways, Singapore Airlines, Turkish Airlines, United
Popular airline
Cathay Pacific
Distance
12903 km
Average flight time
15 hours 20 mins
*Available to Expedia members.