Can I get a flight from Seattle to Singapore on United Airlines for under S$ 1,142?

Cheapflights users have found 9 United Airlines flights for under S$ 1,142 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.

In terms of precipitation, rainfall in Singapore ranges from 150.0 - 269.0 inches per month. December is typically the wettest month, when rainfall can reach 269.0 mm. July is typically the driest time to visit Singapore when rainfall is around 150.0 mm.

If weather is an important factor for your trip to Singapore, use this chart to help with planning. For those seeking warmer temperatures, March is the ideal time of year to visit, when temperatures reach an average of 28.0 C. Travellers hoping to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 26.0 C).

S$ 537+ United Airlines Flights from Seattle to Singapore

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

One-way from	S$ 537
Return from	S$ 1,015
Popular in	December
Cheapest in	September
Average price (all airlines)	S$ 1,051

United Airlines
26-3
1 total stop
22h 00m total
Seattle to Singapore

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United Airlines
25-3-22-4
2 total stops
49h 37m total
Seattle to Singapore

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Highest demand for flights from Seattle/Tacoma Intl to Singapore Changi; 11% potential price increase.

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Best time to find cheap flights from Seattle/Tacoma Intl to Singapore Changi; 5% 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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Can I get a flight from Seattle to Singapore on United Airlines for under S$ 1,142?
Cheapflights users have found 9 United Airlines flights for under S$ 1,142 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

Best

Last-minute

One-way

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 31 January 2026.

Mon 9-217:10

SEA

SIN

1 stop22h 50m

United Airlines

Mon 16-210:10

SIN

SEA

1 stop24h 16m

United Airlines

Deal found 30-1S$ 1,019

Sun 8-215:30

SEA

SIN

2 stops36h 45m

United Airlines

Mon 16-210:10

SIN

SEA

1 stop21h 31m

United Airlines

Deal found 30-1S$ 1,024

Thu 12-205:05

SEA

SIN

1 stop23h 10m

United Airlines

Mon 16-210:10

SIN

SEA

1 stop29h 20m

United Airlines

Deal found 30-1S$ 1,043

Prices

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$ 862. Conversely, traveling with United Airlines from Seattle to Singapore in June will be the most expensive, with an average cost of S$ 1,332. 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.

SEA-SIN

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.

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Fly from Seattle to Singapore on another airline

Singapore Airlines flights from Seattle/Tacoma Intl to Singapore Changi

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See what others are saying about United Airlines

United Airlines

7.4

Good

9,219 reviews

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Overview

Recent reviews

10.0

Wonderful|Jan 2026

Perfect

6.0

Okay|Jan 2026

Seats were uncomfortable. Second leg of my flight on United had much more comfortable seats

10.0

Wonderful|Jan 2026

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family

10.0

Wonderful|Jan 2026

It was a short flight on a small express plane, so no time for amenities. Quickly on, quickly off. No complaints.

10.0

Wonderful|Dec 2025

I liked that the plane waited 5 minutes for a family whose incoming plane was late. This was the last flight of the day to MKE. Flight attendants actually checked in throughout the flight. Although, not really friendly. Happy to see screens on seat backs again. This is my first time not flying first class in over 10 years. It was economy plus.

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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 31 January 2026.

One-way from

Return from

Popular in

Cheapest in

Average price (all airlines)

Can I get a flight from Seattle to Singapore on United Airlines for under S$ 1,142?

Find United Airlines flight deals from Seattle to Singapore

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 31 January 2026.

Explore the most affordable United Airlines flight options available from Seattle to Singapore. Find the lowest fares with prices last updated on 31 January 2026.

Best United Airlines flights from Seattle to Singapore
Discover carefully curated United Airlines flight deals from Seattle to Singapore that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 31 January 2026.

Discover carefully curated United Airlines flight deals from Seattle to Singapore that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 31 January 2026.

Last-minute United Airlines flights from Seattle to Singapore
Discover last-minute United Airlines flight deals from Seattle to Singapore. Data last updated 31 January 2026 and is based on user searches.

Discover last-minute United Airlines flight deals from Seattle to Singapore. Data last updated 31 January 2026 and is based on user searches.

One-way United Airlines flights to Singapore
Search for one-way United Airlines flight options to Singapore. Find affordable one-way fares based on user searches. Data last updated 31 January 2026.

Search for one-way United Airlines flight options to Singapore. Find affordable one-way fares based on user searches. Data last updated 31 January 2026.

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

Rainfall in Singapore by month

Temperature in Singapore by month

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.

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 31 January 2026.

Complete your trip

Complete your trip to Singapore by adding a car rental and/or hotel reservation to your travel itinerary.

Other popular destinations in Asia

If Singapore is not for you, choose from these other destinations located in Asia. Flight routes are based on user searches made on Cheapflights and were last updated on 31 January 2026.

Popular flights with United Airlines

Browse through some of the most popular routes that United Airlines offers at this time. Flights are based on user searches made on Cheapflights and were last updated on 31 January 2026.

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

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 31 January 2026.

One-way from

Return from

Popular in

Cheapest in

Average price (all airlines)

Can I get a flight from Seattle to Singapore on United Airlines for under S$ 1,142?

Find United Airlines flight deals from Seattle to Singapore

Cheapest United Airlines flights from Seattle to SingaporeExplore the most affordable United Airlines flight options available from Seattle to Singapore. Find the lowest fares with prices last updated on 31 January 2026.

Explore the most affordable United Airlines flight options available from Seattle to Singapore. Find the lowest fares with prices last updated on 31 January 2026.

Best United Airlines flights from Seattle to SingaporeDiscover carefully curated United Airlines flight deals from Seattle to Singapore that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 31 January 2026.

Discover carefully curated United Airlines flight deals from Seattle to Singapore that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 31 January 2026.

Last-minute United Airlines flights from Seattle to SingaporeDiscover last-minute United Airlines flight deals from Seattle to Singapore. Data last updated 31 January 2026 and is based on user searches.

Discover last-minute United Airlines flight deals from Seattle to Singapore. Data last updated 31 January 2026 and is based on user searches.

One-way United Airlines flights to SingaporeSearch for one-way United Airlines flight options to Singapore. Find affordable one-way fares based on user searches. Data last updated 31 January 2026.

Search for one-way United Airlines flight options to Singapore. Find affordable one-way fares based on user searches. Data last updated 31 January 2026.

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

Rainfall in Singapore by month

Temperature in Singapore by month

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.

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 31 January 2026.

See what others are saying about United Airlines

Overview

100% Free

Book With Flexibility

Travel Smart

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 31 January 2026.

Best United Airlines flights from Seattle to Singapore
Discover carefully curated United Airlines flight deals from Seattle to Singapore that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 31 January 2026.

Last-minute United Airlines flights from Seattle to Singapore
Discover last-minute United Airlines flight deals from Seattle to Singapore. Data last updated 31 January 2026 and is based on user searches.

One-way United Airlines flights to Singapore
Search for one-way United Airlines flight options to Singapore. Find affordable one-way fares based on user searches. Data last updated 31 January 2026.