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

SEA — SIN
4 Jan — 11 Jan1
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 2025

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 5 December 2025.

One-way from

S$ 542

Return from

S$ 1,036

Popular in

December

Cheapest in

September

Average price (all airlines)

S$ 1,993
United Airlines
  • United Airlines
  • 13-1
  • 1 total stop
  • 21h 57m total
  • Seattle to Singapore
United Airlines
  • United Airlines
  • 18-2-4-3
  • 3 total stops
  • 43h 40m total
  • Seattle to Singapore
Highest demand for flights from Seattle/Tacoma Intl to Singapore Changi; 13% potential price increase.
Best time to find cheap flights from Seattle/Tacoma Intl to Singapore Changi; 6% potential price drop.
Average price for all Seattle/Tacoma Intl to Singapore Changi flights (one-way and round-trip).
  • Can I get a flight from Seattle to Singapore on United Airlines for under S$ 2,073?

    Cheapflights users have found 10 United Airlines flights for under S$ 2,073 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 5 December 2025.

Mon 19-105:00SEA - SIN
2 stops35h 00mUnited Airlines
Mon 26-110:45SIN - SEA
1 stop18h 35mUnited Airlines
Deal found 4-12S$ 1,042
Mon 19-112:24SEA - SIN
2 stops27h 36mUnited Airlines
Thu 29-110:10SIN - SEA
2 stops22h 19mUnited Airlines
Deal found 4-12S$ 1,043
Sun 18-117:12SEA - SIN
2 stops35h 03mUnited Airlines
Sun 25-110:45SIN - SEA
2 stops47h 43mUnited Airlines
Deal found 4-12S$ 1,055

Travel insights for United Airlines flights from Seattle to Singapore

Get recent, data-driven insights about United Airlines flights from Seattle to Singapore, including ideal travel times, pricing trends, and more.

What is the cheapest month to book a flight from Seattle to Singapore with United Airlines?

Currently, the most affordable month to book a United Airlines flight from Seattle to Singapore in August, with an average price of S$ 881. Conversely, traveling with United Airlines from Seattle to Singapore in June will be the most expensive, with an average cost of S$ 1,364. Various factors influence flight prices, so comparing airlines, departure airports, and times can help reduce costs.

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 5 December 2025.

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 5 December 2025.
United Airlines
7.4
Good
9,066 reviews
Overview

Food

6.6

Boarding

7.7

Crew

8.1

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.