Flights
Insights
FAQs

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

SEA — SIN
31 May — 7 Jun1
1 adult
1 adult, Economy, 0 bags

Cheapflights users flying from Seattle to Singapore on United Airlines typically fly into Singapore Changi and depart from Seattle/Tacoma Intl. Select your dates above for pricing.

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 1 May 2026.

One-way from

S$ 633

Return from

S$ 1,238

Popular in

December

Cheapest in

September

Average price (all airlines)

S$ 1,134
United Airlines
  • United Airlines
  • 18-8
  • 1 total stop
  • 25h 56m total
  • Seattle to Singapore
Search Deals
United Airlines
  • United Airlines
  • 14-10-17-11
  • 2 total stops
  • 49h 30m total
  • Seattle to Singapore
Search Deals
Highest demand for flights from Seattle/Tacoma Intl to Singapore Changi; 12% potential price increase.
Search Deals
Best time to find cheap flights from Seattle/Tacoma Intl to Singapore Changi; 5% potential price drop.
Search Deals
Average price for all Seattle/Tacoma Intl to Singapore Changi flights (one-way and round-trip).
Search Deals

  • Can I get a flight from Seattle to Singapore on United Airlines for under S$ 1,149?

    Cheapflights users have found 8 United Airlines flights for under S$ 1,149 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.

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
Explore the most affordable United Airlines flight options available from Seattle to Singapore. Find the lowest fares with prices last updated on 1 May 2026.

Fri 1-517:25
SEA
-
SIN
1 stop22h 20m
United Airlines
Fri 8-509:00
SIN
-
SEA
1 stop20h 36m
United Airlines
Deal found 30-4S$ 1,240
Fri 1-507:08
SEA
-
SIN
1 stop20h 27m
United Airlines
Sun 3-511:05
SIN
-
SEA
2 stops49h 01m
United Airlines
Deal found 28-4S$ 1,252
Thu 7-512:34
SEA
-
SIN
2 stops39h 01m
United Airlines
Thu 14-509:00
SIN
-
SEA
2 stops27h 58m
United Airlines
Deal found 30-4S$ 1,263

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 June 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

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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 1 May 2026.
Korean Air flights from Seattle/Tacoma Intl to Singapore Changi
Singapore Airlines 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 1 May 2026.
United Airlines
7.4
Good
9,675 reviews
Check prices
Overview

Crew

8.1

Boarding

7.7

Food

6.6

Comfort

7.3

Entertainment

7.1

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book With Flexibility

Our users can plan ahead with confidence and find flights with no change fees.

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.