Can I get a flight from Seattle to Singapore on United Airlines for under S$ 800?

Cheapflights users have found 11 United Airlines flights for under S$ 800 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$ 504+ 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 2025

One-way from	S$ 504
Return from	S$ 981
Popular in	December
Cheapest in	September
Average price (all airlines)	S$ 986

United Airlines
4-11
2 total stops
27h 19m total
Seattle to Singapore

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United Airlines
5-1-13-1
2 total stops
39h 45m total
Seattle to Singapore

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Highest demand for flights from Seattle/Tacoma Intl to Singapore Changi; 14% 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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Can I get a flight from Seattle to Singapore on United Airlines for under S$ 800?
Cheapflights users have found 11 United Airlines flights for under S$ 800 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 15 October 2025.

Mon 10-1115:37SEA - SIN

1 stop24h 23mUnited Airlines

Mon 17-1110:10SIN - SEA

1 stop19h 28mUnited Airlines

Deal found 15-10S$ 982

Thu 27-1105:05SEA - SIN

2 stops34h 55mUnited Airlines

Thu 4-1222:20SIN - SEA

1 stop18h 39mUnited Airlines

Deal found 13-10S$ 987

Sun 16-1113:20SEA - SIN

1 stop38h 55mUnited Airlines

Mon 24-1122:20SIN - SEA

2 stops35h 50mUnited Airlines

Deal found 13-10S$ 995

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 15 October 2025.

Mon 10-1107:00SEA - SIN

1 stop21h 15mUnited Airlines

Mon 17-1122:20SIN - SEA

1 stop18h 39mUnited Airlines

Deal found 13-10S$ 982

Thu 27-1105:05SEA - SIN

2 stops34h 55mUnited Airlines

Thu 4-1222:20SIN - SEA

2 stops31h 27mUnited Airlines

Deal found 13-10S$ 987

Sun 11-115:30SEA - SIN

2 stops36h 45mUnited Airlines

Wed 21-122:20SIN - SEA

2 stops29h 21mUnited Airlines

Deal found 14-10S$ 987

Last-minute United Airlines flights from Seattle to Singapore
Discover last-minute United Airlines flight deals from Seattle to Singapore. Data last updated 15 October 2025 and is based on user searches.

Mon 10-1115:37SEA - SIN

1 stop24h 23mUnited Airlines

Mon 17-1110:10SIN - SEA

1 stop19h 28mUnited Airlines

Deal found 15-10S$ 982

Thu 27-1105:05SEA - SIN

2 stops34h 55mUnited Airlines

Thu 4-1222:20SIN - SEA

1 stop18h 39mUnited Airlines

Deal found 13-10S$ 987

Sun 16-1113:20SEA - SIN

1 stop38h 55mUnited Airlines

Mon 24-1122:20SIN - SEA

2 stops35h 50mUnited Airlines

Deal found 13-10S$ 995

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 15 October 2025.

Tue 4-1105:30SEA - SIN

1 stop22h 45mUnited Airlines

Deal found 14-10S$ 504

Mon 24-1114:40SEA - SIN

1 stop25h 20mUnited Airlines

Deal found 13-10S$ 505

Tue 11-1109:25SEA - SIN

1 stop30h 35mUnited Airlines

Deal found 14-10S$ 511

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.

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$ 883. Conversely, traveling with United Airlines from Seattle to Singapore in June will be the most expensive, with an average cost of S$ 1,368. 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

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See what others are saying about United Airlines

United Airlines

7.4

Good

8,976 reviews

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Overview

Recent reviews

8.0

Very Good|Oct 2025

Crew and customer service are 5 stars. I had a lot of luggage for a very long trip and they were nothing but helpful and found solutions to every problem. It was my first time flying with United, and they really are the friendly skies. Leg room however, on 2/3 flights was terrible. Same for entertainment: There was only a seat-mounted screen on 1/3 flights. It would have been nice to have on the longest leg of the journey.

4.0

Mediocre|Sept 2025

This was pretty bad. It’s chaos at the Dulles boarding gates for the small regional jets because they use one gate to board 3-4 flights at a time. So, it’s difficult knowing where and when to go. There is little space for any size of carrry-on, so most had to gate check their bags. However, the worst of it was that our single flight attendant fell asleep before we took off and the pilot couldn’t do so until she responded to his messages. My wife had to wake her up! So we were a little late leaving. Not to be thwarted, the flight attendant fell asleep right after take off and there was no sight of her during the flight. When the aircraft touched down, a tray of unsecured canned drinks came crashing onto the aisle up front. I can only assume someone didn’t do what they were supposed to. The pilot was great, but I’m sure he must not be happy with this crew member.

10.0

Wonderful|Sept 2025

The premium economy seats were very comfortable and the attention and service by the flight attendants was superb.

10.0

Wonderful|Sept 2025

The staff were amazing, from check in to boarding and on the flight. The range of entertainment options were really good as well.

10.0

Wonderful|Sept 2025

Lufthansa was amazing, I wish United States based airlines operated like them.

1 out of 2992

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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 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 15 October 2025.

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$ 800?

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 15 October 2025.

Explore the most affordable United Airlines flight options available from Seattle to Singapore. Find the lowest fares with prices last updated on 15 October 2025.

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?

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 15 October 2025.

See what others are saying about United Airlines

Overview

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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 15 October 2025.