How long is the flight from State of Washington to Singapore?

Flight times from State of Washington to Singapore vary, but if you’re flying out of Seattle and flying into Singapore (one of the most popular routes), then the duration is 16h 20m on average. Another popular route from State of Washington to Singapore is flying from Spokane to Singapore, which will take roughly 24h 23m. Keep in mind that layovers or delays could extend your travel time.

What airlines fly to Singapore?

Singapore Airlines, United Airlines and Air Canada are the top three most popular airlines that fly to Singapore from State of Washington according to our data. Singapore Airlines is the first choice among our users, with 59% of people opting to fly with this airline when traveling to Singapore. Keep in mind that there are 13 different airlines that fly to Singapore on a routine basis, so you have a few additional options to choose from.

What is the cheapest airline that flies from Washington to Singapore?

Singapore Airlines, Philippine Airlines, and Asiana Airlines are the most popular carriers operating from Washington to Singapore

How many flights depart from State of Washington to Singapore on average per week?

The number of flights available between State of Washington and Singapore is 4 per week as of November 2025. The most frequent departure day is Tue, with 25% of weekly flights leaving on this day.

When did momondo last update prices for flights from Washington to Singapore?

Prices for flights from Washington to Singapore are updated daily.

How many operators does momondo search for flights from Washington to Singapore?

As of November 2025, there are 13 operators available to choose from for flights from Washington to Singapore.

How old do you have to be to fly from Washington to Singapore?

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Washington to Singapore.

What documentation or ID do you need to fly to Singapore?

The required travel and health documents for your Singapore trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Singapore. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$265 Cheap Flights from Washington to Singapore in 2025/26

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Cheap round-trip flights

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12:10 am - 9:55 pmSEA-SIN

29h 45m1 stop

11:10 pm - 1:55 pmSIN-SEA

30h 45m1 stop

$706Asiana Airlines

Find Deal

Wed, Jan 28 - Sat, Feb 14

12:10 am - 9:55 pmSEA-SIN

29h 45m1 stop

11:10 pm - 1:55 pmSIN-SEA

30h 45m1 stop

$707Asiana Airlines

Find Deal

Mon, Jan 26 - Thu, Feb 5

8:45 am - 5:45 pmSEA-SIN

17h 00mnonstop

9:00 am - 7:10 amSIN-SEA

14h 10mnonstop

$714Singapore Airlines

Find Deal

Thu, Jan 29 - Sat, Feb 14

8:45 am - 5:45 pmSEA-SIN

17h 00mnonstop

9:00 am - 7:10 amSIN-SEA

14h 10mnonstop

$727Singapore Airlines

Find Deal

Sun, Feb 1 - Sat, Feb 14

8:45 am - 5:45 pmSEA-SIN

17h 00mnonstop

9:20 am - 4:36 pmSIN-SEA

23h 16m2 stops

$736Multiple Airlines

Find Deal

Thu, Jan 15 - Wed, Mar 4

8:45 am - 5:45 pmSEA-SIN

17h 00mnonstop

9:15 am - 6:55 pmSIN-SEA

25h 40m1 stop

$737Multiple Airlines

Find Deal

Tue, Jan 27 - Sat, Feb 14

10:05 am - 3:10 amSEA-SIN

25h 05m2 stops

4:30 pm - 8:05 amSIN-SEA

31h 35m2 stops

$754Hainan Airlines

Find Deal

Thu, Jan 15 - Wed, Mar 4

5:20 pm - 8:00 amSEA-SIN

22h 40m1 stop

10:20 pm - 12:50 amSIN-SEA

18h 30m1 stop

$755United Airlines

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Mon, Nov 17 - Thu, Dec 11

12:36 pm - 8:00 amSEA-SIN

27h 24m2 stops

10:45 am - 1:20 pmSIN-SEA

18h 35m1 stop

$759United Airlines

Find Deal

Thu, Dec 4 - Thu, Dec 11

10:05 am - 3:10 amSEA-SIN

25h 05m2 stops

4:40 am - 8:05 amSIN-SEA

43h 25m2 stops

$776Hainan Airlines

Find Deal

Thu, Jan 15 - Tue, Jan 20

United Airlines flights from State of Washington to Singapore

Our best United Airlines deals on State of Washington to Singapore flight tickets

United Airlines

Nov 17

SEA5:20 pmSeattle/Tacoma Intl

22h 40m

1 stop

SIN8:00 amSingapore Changi

Dec 11

SIN10:20 pmSingapore Changi

18h 30m

1 stop

SEA12:50 amSeattle/Tacoma Intl

$755

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United Airlines

Dec 4

SEA12:36 pmSeattle/Tacoma Intl

27h 24m

2 stops

SIN8:00 amSingapore Changi

Dec 11

SIN10:45 amSingapore Changi

18h 35m

1 stop

SEA1:20 pmSeattle/Tacoma Intl

$759

Find similar

United Airlines

Jan 11

SEA3:30 pmSeattle/Tacoma Intl

36h 45m

2 stops

SIN8:15 pmSingapore Changi

Jan 21

SIN10:20 pmSingapore Changi

18h 39m

1 stop

SEA12:59 amSeattle/Tacoma Intl

$760

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ANA flights from State of Washington to Singapore

Our best ANA deals on State of Washington to Singapore flight tickets

ANA

Jan 8

SEA3:45 pmSeattle/Tacoma Intl

33h 50m

1 stop

SIN5:35 pmSingapore Changi

Jan 29

SIN10:45 amSingapore Changi

18h 35m

1 stop

SEA1:20 pmSeattle/Tacoma Intl

$782

Find similar

ANA

Jan 8

SEA3:45 pmSeattle/Tacoma Intl

33h 50m

1 stop

SIN5:35 pmSingapore Changi

Jan 29

SIN10:45 amSingapore Changi

26h 27m

2 stops

SEA9:12 pmSeattle/Tacoma Intl

$795

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momondo Fare Finder

Use the filters below to find and compare flights from Washington to Singapore that are best for you.

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Route

Depart

Return

Price

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

Wed 1/28

12:10 am-9:55 pm

1 stop29h 45m

Singapore Changi

Sat 2/14

11:10 pm-1:55 pm

1 stop30h 45m

$706

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

Mon 1/26

12:10 am-9:55 pm

1 stop29h 45m

Singapore Changi

Thu 2/5

11:10 pm-1:55 pm

1 stop30h 45m

$707

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

Thu 1/29

8:45 am-5:45 pm

Nonstop17h 00m

Singapore Changi

Sat 2/14

9:00 am-7:10 am

Nonstop14h 10m

$714

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

Sun 2/1

8:45 am-5:45 pm

Nonstop17h 00m

Singapore Changi

Sat 2/14

9:00 am-7:10 am

Nonstop14h 10m

$727

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

Thu 1/15

8:45 am-5:45 pm

Nonstop17h 00m

Singapore Changi

Wed 3/4

9:20 am-4:36 pm

2 stops23h 16m

$736

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

Tue 1/27

8:45 am-5:45 pm

Nonstop17h 00m

Singapore Changi

Sat 2/14

9:15 am-6:55 pm

1 stop25h 40m

$737

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

Thu 1/15

10:05 am-3:10 am

2 stops25h 05m

Singapore Changi

Wed 3/4

4:30 pm-8:05 am

2 stops31h 35m

$754

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

Mon 11/17

5:20 pm-8:00 am

1 stop22h 40m

Singapore Changi

Thu 12/11

10:20 pm-12:50 am

1 stop18h 30m

$755

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

Thu 12/4

12:36 pm-8:00 am

2 stops27h 24m

Singapore Changi

Thu 12/11

10:45 am-1:20 pm

1 stop18h 35m

$759

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

Thu 1/15

10:05 am-3:10 am

2 stops25h 05m

Singapore Changi

Tue 1/20

4:40 am-8:05 am

2 stops43h 25m

$776

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Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from State of Washington to Singapore

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Other information

What is the cheapest month to fly to Singapore?

The month of September is, on average, the cheapest month to fly to Singapore from State of Washington, with most prices found around $725. If you aren’t able to travel to Singapore during the month of September, then flying in February is also cheap. Prices for this month can be found on momondo for an average of $741.

What is the cheapest day to depart on your flight to Singapore?

The cheapest day to depart from State of Washington to Singapore is on a Tuesday when prices can be found for as low as $1,017. The most expensive day to fly to Singapore is Monday, with ticket prices averaging around $1,171.

What is the cheapest time of day to depart on your flight to Singapore?

In the morning is the cheapest time of day to fly from State of Washington to Singapore when you can find flight prices for as low as $1,084. Flying to Singapore in the morning is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying in the evening when prices are $1,226 on average. Flights to Singapore from State of Washington in the evening are generally more expensive because this time of day is more convenient for travelers’ schedules.

What is the cheapest Washington to Singapore flight route?

Fly from Seattle/Tacoma Intl to Singapore Changi for the best Washington - Singapore flight prices

How far in advance should I book a flight to Singapore?

You are more likely to see cheaper flights to Singapore from State of Washington when booking weeks ahead of your departure date. In general, you can expect to find flights to Singapore for around $919 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Singapore from State of Washington for as low as $804 on momondo.

What cabin class options are available on Washington to Singapore flights?

There are 3 cabin classes available to choose from on Washington to Singapore flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on State of Washington to Singapore flights?

No. A direct flight is the cheapest option for a flight between State of Washington to Singapore.

Cheap State of Washington to Singapore flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from State of Washington to Singapore

Best Price Found	$306
Fastest flight time	17h 00m
Direct flights	Mon, Wed, Fri, Sat and Sun
Airports in Singapore	1 airport

The best one-way flight to Singapore from State of Washington in the past 72 hours is $306. The best round-trip flight deal from State of Washington to Singapore found on momondo in the last 72 hours is $708.

The fastest flight from State of Washington to Singapore takes 17h 00m

Direct flights go from State of Washington to Singapore on Monday, Wednesday, Friday, Saturday and Sunday. The only airline offering direct flights is Singapore Airlines.

There is 1 airport near Singapore: Singapore Changi (SIN)

Search flight deals

When did momondo last update prices for flights from Washington to Singapore?
Prices for flights from Washington to Singapore are updated daily.
How many operators does momondo search for flights from Washington to Singapore?
As of November 2025, there are 13 operators available to choose from for flights from Washington to Singapore.
How old do you have to be to fly from Washington to Singapore?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Washington to Singapore.
What documentation or ID do you need to fly to Singapore?
The required travel and health documents for your Singapore trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Singapore. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
What is the most popular plane model from State of Washington to Singapore?
momondo data reveals that the most frequently booked plane model on the route from State of Washington to Singapore is Airbus A350-900, representing 69.54% of all bookings. The subsequent popular models are Boeing 777-300 at 27.48%, Boeing 787-9 Dreamliner at 1.32%, and Boeing 787-10 Dreamliner at 0.66%.

Best airlines flying from State of Washington to Singapore

Compare and see reviews for airlines that fly from State of Washington to Singapore with momondo

Airline	Rating	Free Cancellation	Price
Singapore Airlines	PriceFrom $596	Free Cancellation	Rating 8.1 1,393 reviews	Search Singapore Airlines flights
Philippine Airlines	PriceFrom $650	Free Cancellation	Rating 7.3 932 reviews	Search Philippine Airlines flights
Asiana Airlines	PriceFrom $662	Free Cancellation	Rating 8.2 485 reviews	Search Asiana Airlines flights
Japan Airlines	PriceFrom $687	Free Cancellation	Rating 8.3 1,604 reviews	Search Japan Airlines flights
Air Canada	PriceFrom $712	Free Cancellation	Rating 7.1 10,416 reviews	Search Air Canada flights
ANA	PriceFrom $718	Free Cancellation	Rating 8.4 1,003 reviews	Search ANA flights
United Airlines	PriceFrom $724	Free Cancellation	Rating 7.4 9,007 reviews	Search United Airlines flights
Korean Air	PriceFrom $736	Free Cancellation	Rating 8.4 1,160 reviews	Search Korean Air flights
Delta	PriceFrom $750	Free Cancellation	Rating 7.9 8,001 reviews	Search Delta flights
China Airlines	PriceFrom $933	Free Cancellation	Rating 8.3 778 reviews	Search China Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from Washington to Singapore?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Washington to Singapore. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from Washington to Singapore with flexible booking policies on momondo?

All flight searches from Washington to Singapore on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Washington to Singapore?

Once all potential Washington to Singapore flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Washington to Singapore right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Singapore from Washington. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

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Cheap flights from Washington to Singapore from $265

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Washington to Singapore departing on 2/1. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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Find the cheapest flights from Washington to Singapore

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United Airlines flights from State of Washington to Singapore

Our best United Airlines deals on State of Washington to Singapore flight tickets

ANA flights from State of Washington to Singapore

Our best ANA deals on State of Washington to Singapore flight tickets

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Use the filters below to find and compare flights from Washington to Singapore that are best for you.

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How to get the cheapest flight ticket from State of Washington to Singapore

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Singapore?

What is the cheapest day to depart on your flight to Singapore?

The cheapest day to depart from State of Washington to Singapore is on a Tuesday when prices can be found for as low as $1,017. The most expensive day to fly to Singapore is Monday, with ticket prices averaging around $1,171.

What is the cheapest time of day to depart on your flight to Singapore?

What is the cheapest Washington to Singapore flight route?

Fly from Seattle/Tacoma Intl to Singapore Changi for the best Washington - Singapore flight prices

How far in advance should I book a flight to Singapore?

What cabin class options are available on Washington to Singapore flights?

There are 3 cabin classes available to choose from on Washington to Singapore flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on State of Washington to Singapore flights?

No. A direct flight is the cheapest option for a flight between State of Washington to Singapore.

What is the cheapest airline that flies from Washington to Singapore?

Singapore Airlines, Philippine Airlines, and Asiana Airlines are the most popular carriers operating from Washington to Singapore

What airlines fly to Singapore?

How many flights depart from State of Washington to Singapore on average per week?

The number of flights available between State of Washington and Singapore is 4 per week as of November 2025. The most frequent departure day is Tue, with 25% of weekly flights leaving on this day.

How long is the flight from State of Washington to Singapore?

Cheap State of Washington to Singapore flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from State of Washington to Singapore

Best Price Found

Fastest flight time

Direct flights

Airports in Singapore

When did momondo last update prices for flights from Washington to Singapore?

How many operators does momondo search for flights from Washington to Singapore?

How old do you have to be to fly from Washington to Singapore?

What documentation or ID do you need to fly to Singapore?

What is the most popular plane model from State of Washington to Singapore?

Best airlines flying from State of Washington to Singapore

Compare and see reviews for airlines that fly from State of Washington to Singapore with momondo

Why use momondo?

Why should I use momondo to find a flight deal from Washington to Singapore?

Can I find flights from Washington to Singapore with flexible booking policies on momondo?

How can momondo help me find flights from Washington to Singapore?

I’m not ready to book a flight from Washington to Singapore right now. Can momondo alert me if prices change?

An easier way to manage your Singapore trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Singapore

Popular cities in Singapore

Popular flights according to clicks in the last 7 days on momondo