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

SEA — SIN
3 Aug — 10 Aug1
1 adult
1 adult, Economy, 0 bags

Find United Airlines flight deals from Seattle to Singapore

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Cheapest United Airlines flights from Seattle to Singapore
Explore the most affordable United Airlines flight options available from Seattle to Singapore. Find the lowest fares with prices last updated on 4 July 2026.

Thu 23-719:05
SEA
-
SIN
1 stop20h 10m
United Airlines
Tue 25-808:45
SIN
-
SEA
1 stop22h 29m
United Airlines
Deal found 3-7S$ 1,375
Fri 3-713:30
SEA
-
SIN
1 stop25h 45m
United Airlines
Wed 12-808:45
SIN
-
SEA
1 stop29h 41m
United Airlines
Deal found 3-7S$ 1,383
Sat 25-716:30
SEA
-
SIN
1 stop23h 10m
United Airlines
Sat 22-808:45
SIN
-
SEA
1 stop20h 39m
United Airlines
Deal found 3-7S$ 1,387

  • Can I get a flight from Seattle to Singapore on United Airlines for under S$ 1,162?

    Cheapflights users have found 7 United Airlines flights for under S$ 1,162 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

Find detailed information about United Airlines flights from Seattle to Singapore. Explore the options provided by United Airlines to plan your journey from Seattle to Singapore. Data last updated 4 July 2026.

One-way from

S$ 523

Return from

S$ 1,060

Popular in

December

Cheapest in

November

Average price (all airlines)

S$ 1,145
United Airlines
  • United Airlines
  • 8-9
  • 1 total stop
  • 30h 35m total
  • Seattle to Singapore
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United Airlines
  • United Airlines
  • 15-9-29-9
  • 2 total stops
  • 42h 05m total
  • Seattle to Singapore
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Highest demand for flights from Seattle/Tacoma Intl to Singapore Changi; 15% potential price increase.
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Best time to find cheap flights from Seattle/Tacoma Intl to Singapore Changi; 7% 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
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Browse thousands of different options on Cheapflights for your next trip

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Fly from Seattle to Singapore on another airline

Consider alternative airlines that service the Singapore area. Flight routes are based on user searches made on Cheapflights and were last updated on 4 July 2026.
Singapore Airlines flights from Seattle/Tacoma Intl to Singapore Changi
Korean Air flights from Seattle/Tacoma Intl to Singapore Changi

See what others are saying about United Airlines

Read reviews and see what other travellers are saying about their experiences with United Airlines. Get insights from real passengers regarding the airline's services, customer satisfaction, and overall travel experience. Use these reviews to inform your decision when choosing United Airlines for your next flight. Reviews last updated 4 July 2026.
United Airlines
7.4
Good
9,933 reviews
Check prices
Overview

Boarding

7.7

Entertainment

7.1

Comfort

7.3

Food

6.7

Crew

8.1

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