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United Airlines flights from Seattle to Singapore (SEA - SIN)

SEA — SIN
30 Sep — 7 Oct1
1 adult
1 adult, Economy, 0 bags

Find United Airlines flight deals from Seattle to Singapore

Enter your travel dates to find the best prices.

Cheapest United Airlines flights from Seattle to Singapore

Mon 7-907:11 -
1 stop32h 04m
Tue 15-920:35 -
1 stop29h 46m
Deal found 31-8S$ 1,036
Tue 1-907:11 -
1 stop20h 24m
Mon 7-908:45 -
1 stop22h 29m
Deal found 27-8S$ 1,048
Mon 7-907:11 -
1 stop20h 24m
Wed 16-906:15 -
2 stops24h 59m
Deal found 30-8S$ 1,051

  • Can I get a flight from Seattle to Singapore on United Airlines for under S$ 1,274?

    Cheapflights users have found 9 United Airlines flights for under S$ 1,274 on the SEA-SIN route. Prices on flights to Singapore from Seattle can vary based on many factors including dates. To look at price based on your preferred dates, click here.

United Airlines flights from Seattle to Singapore in 2026

One-way from

S$ 511

Return from

S$ 1,048

Popular in

December

Cheapest in

November

Average price (all airlines)

S$ 1,156
United Airlines
  • United Airlines
  • 11-10
  • 1 total stop
  • 20h 35m total
  • Seattle to Singapore
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United Airlines
  • United Airlines
  • 11-9-20-9
  • 2 total stops
  • 58h 39m total
  • Seattle to Singapore
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Highest demand for flights from Seattle/Tacoma Intl to Singapore Changi; 12% potential price increase.
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Best time to find cheap flights from Seattle/Tacoma Intl to Singapore Changi; 6% potential price drop.
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Average price for all Seattle/Tacoma Intl to Singapore Changi flights (one-way and round-trip).
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Which month is the cheapest to fly Economy class from Seattle to Singapore?

For Economy class flights, the cheapest month to fly this route is March. The most expensive months are April and February.

Best time to book a flight from Seattle to Singapore

Have a flexible travel schedule? Discover the best time to fly to Singapore from Seattle with our price prediction graph.
Estimated return price

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Fly from Seattle to Singapore on another airline

Singapore Airlines flights from Seattle/Tacoma Intl to Singapore Changi

See what others are saying about United Airlines

United Airlines
7.4
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10,000 reviews
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Overview

Boarding

7.7

Comfort

7.3

Food

6.7

Crew

8.1

Entertainment

7.1

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