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

Singapore Airlines, Philippine Airlines, and United 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 5 per week as of April 2026. The most frequent departure day is Tue, with 20% of weekly flights leaving on this day.

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 21h 35m. Keep in mind that layovers or delays could extend your travel time.

What airlines fly to Singapore?

Singapore Airlines, United Airlines and Korean Air 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 73% of people opting to fly with this airline when traveling to Singapore. Keep in mind that there are 12 different airlines that fly to Singapore on a routine basis, so you have a few additional options to choose from.

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 April 2026, there are 12 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.

$332 Cheap Flights from Washington to Singapore in 2026

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Find the cheapest flights from Washington to Singapore

Round-trip

One-way

Last minute

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Cheap round-trip flights

Enter your travel dates to find the best prices.

10:15 am - 5:35 pm

SEA

SIN

16h 20mnonstop

9:00 am - 8:10 am

SIN

SEA

14h 10mnonstop

$669Singapore Airlines

Thu, Oct 8 - Sun, Oct 25

10:15 am - 5:35 pm

SEA

SIN

16h 20mnonstop

9:00 am - 8:45 am

SIN

SEA

14h 45mnonstop

$757Singapore Airlines

Fri, Sep 11 - Sun, Sep 20

10:15 am - 5:35 pm

SEA

SIN

16h 20mnonstop

9:15 am - 4:11 pm

SIN

SEA

21h 56m

1 stop

$769Singapore Airlines

Thu, Aug 20 - Wed, Aug 26

4:21 pm - 7:40 am

GEG

SIN

24h 19m

1 stop

9:00 am - 12:39 pm

SIN

GEG

18h 39m

1 stop

$971Multiple Airlines

Tue, Sep 8 - Tue, Sep 15

7:00 am - 7:10 pm

PDX

SIN

21h 10m

1 stop

9:00 am - 12:22 pm

SIN

PDX

18h 22m

1 stop

$1,007Multiple Airlines

Thu, Oct 1 - Sat, Oct 10

1:52 pm - 9:20 am

PDX

SIN

28h 28m

2 stops

7:40 pm - 9:28 pm

SIN

PDX

40h 48m

2 stops

$1,024Qatar Airways

Wed, May 6 - Fri, May 15

8:45 am - 4:15 pm

PDX

SIN

40h 30m

2 stops

7:40 pm - 10:53 pm

SIN

PDX

42h 13m

2 stops

$1,031Qatar Airways

Wed, Apr 22 - Sun, May 3

7:45 pm - 5:15 am

PDX

SIN

18h 30m

1 stop

7:00 am - 12:53 am

SIN

PDX

32h 53m

2 stops

$1,047Air Canada

Thu, Oct 1 - Sat, Oct 10

7:45 pm - 5:15 am

PDX

SIN

18h 30m

1 stop

7:00 am - 12:53 am

SIN

PDX

32h 53m

2 stops

$1,048Air Canada

Thu, Oct 1 - Sat, Oct 10

6:00 am - 6:35 pm

GEG

SIN

21h 35m

1 stop

11:05 am - 11:51 pm

SIN

GEG

51h 46m

2 stops

$1,785United Airlines

Sun, May 24 - Sun, May 31

Philippine Airlines flights from State of Washington to Singapore

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

Philippine Airlines

Sep 6

SEA11:10 pmSeattle/Tacoma Intl

33h 25m

1 stop

SIN11:35 pmSingapore Changi

Sep 15

SIN8:00 pmSingapore Changi

39h 05m

1 stop

SEA8:05 pmSeattle/Tacoma Intl

$855

Philippine Airlines

Sep 8

SEA11:10 pmSeattle/Tacoma Intl

33h 25m

1 stop

SIN11:35 pmSingapore Changi

Sep 15

SIN8:00 pmSingapore Changi

39h 05m

1 stop

SEA8:05 pmSeattle/Tacoma Intl

$897

Philippine Airlines

Sep 3

SEA11:10 pmSeattle/Tacoma Intl

18h 55m

1 stop

SIN9:05 amSingapore Changi

Sep 9

SIN2:30 pmSingapore Changi

20h 35m

1 stop

SEA8:05 pmSeattle/Tacoma Intl

$904

Asiana Airlines flights from State of Washington to Singapore

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

Asiana Airlines

Sep 10

SEA12:55 amSeattle/Tacoma Intl

29h 35m

1 stop

SIN9:30 pmSingapore Changi

Sep 19

SIN10:50 pmSingapore Changi

31h 05m

1 stop

SEA2:55 pmSeattle/Tacoma Intl

$827

Asiana Airlines

Sep 10

SEA12:55 amSeattle/Tacoma Intl

29h 35m

1 stop

SIN9:30 pmSingapore Changi

Sep 20

SIN10:50 pmSingapore Changi

31h 05m

1 stop

SEA2:55 pmSeattle/Tacoma Intl

$828

Asiana Airlines

Aug 27

SEA12:55 amSeattle/Tacoma Intl

29h 35m

1 stop

SIN9:30 pmSingapore Changi

Sep 14

SIN10:50 pmSingapore Changi

31h 05m

1 stop

SEA2:55 pmSeattle/Tacoma Intl

$832

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Quickest round-trip

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

Thu 10/8

10:15 am-5:35 pm

Nonstop16h 20m

Singapore Changi

Sun 10/25

9:00 am-8:10 am

Nonstop14h 10m

$669

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

Fri 9/11

10:15 am-5:35 pm

Nonstop16h 20m

Singapore Changi

Sun 9/20

9:00 am-8:45 am

Nonstop14h 45m

$757

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

Thu 8/20

10:15 am-5:35 pm

Nonstop16h 20m

Singapore Changi

Wed 8/26

9:15 am-4:11 pm

1 stop21h 56m

$769

SpokaneSingapore

GEG - SIN

GEGSIN

Spokane

Tue 9/8

4:21 pm-7:40 am

1 stop24h 19m

Singapore Changi

Tue 9/15

9:00 am-12:39 pm

1 stop18h 39m

$971

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Thu 10/1

7:00 am-7:10 pm

1 stop21h 10m

Singapore Changi

Sat 10/10

9:00 am-12:22 pm

1 stop18h 22m

$1,007

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Wed 5/6

1:52 pm-9:20 am

2 stops28h 28m

Singapore Changi

Fri 5/15

7:40 pm-9:28 pm

2 stops40h 48m

$1,024

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Wed 4/22

8:45 am-4:15 pm

2 stops40h 30m

Singapore Changi

Sun 5/3

7:40 pm-10:53 pm

2 stops42h 13m

$1,031

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Thu 10/1

7:45 pm-5:15 am

1 stop18h 30m

Singapore Changi

Sat 10/10

7:00 am-12:53 am

2 stops32h 53m

$1,047

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Thu 10/1

7:45 pm-5:15 am

1 stop18h 30m

Singapore Changi

Sat 10/10

7:00 am-12:53 am

2 stops32h 53m

$1,048

SpokaneSingapore

GEG - SIN

GEGSIN

Spokane

Sun 5/24

6:00 am-6:35 pm

1 stop21h 35m

Singapore Changi

Sun 5/31

11:05 am-11:51 pm

2 stops51h 46m

$1,785

Flights are sorted by cheapest round-trip flights first.

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

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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 $648. If you aren’t able to travel to Singapore during the month of September, then flying in March is also cheap. Prices for this month can be found on momondo for an average of $734.

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 $877. The most expensive day to fly to Singapore is Wednesday, with ticket prices averaging around $1,168.

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 $864 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 $660 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	$316
Fastest flight time	16h 20m
Direct flights	Mon, Wed, Fri, Sat and Sun
Airports in Singapore	2 airports

The best one-way flight to Singapore from State of Washington in the past 72 hours is $316. The best round-trip flight deal from State of Washington to Singapore found on momondo in the last 72 hours is $791.

The fastest flight from State of Washington to Singapore takes 16h 20m

Direct flights go from State of Washington to Singapore on Monday, Wednesday, Friday, Saturday and Sunday. There are no airlines offering direct flights.

There are 2 airports in Singapore. From State of Washington there are direct flights to Singapore Changi (SIN).

Search flight deals

Frequently asked questions about flying from Washington to Singapore

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 April 2026, there are 12 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 69.89% of all bookings. The subsequent popular models are Boeing 777-300 at 20.22%, Boeing 787-9 Dreamliner at 6.52%, and Airbus A330-200 at 1.12%.

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 $508	Free Cancellation	Rating 8.2 1,492 reviews	Search Singapore Airlines flights
Philippine Airlines	PriceFrom $648	Free Cancellation	Rating 7.3 985 reviews	Search Philippine Airlines flights
Asiana Airlines	PriceFrom $661	Free Cancellation	Rating 8.1 515 reviews	Search Asiana Airlines flights
United Airlines	PriceFrom $671	Free Cancellation	Rating 7.4 9,571 reviews	Search United Airlines flights
Air Canada	PriceFrom $710	Free Cancellation	Rating 7.1 10,916 reviews	Search Air Canada flights
Korean Air	PriceFrom $736	Free Cancellation	Rating 8.4 1,204 reviews	Search Korean Air flights
ANA	PriceFrom $750	Free Cancellation	Rating 8.4 1,171 reviews	Search ANA flights
Delta	PriceFrom $754	Free Cancellation	Rating 7.9 8,406 reviews	Search Delta flights
Cathay Pacific	PriceFrom $774	Free Cancellation	Rating 7.6 1,271 reviews	Search Cathay Pacific flights
Japan Airlines	PriceFrom $792	Free Cancellation	Rating 8.3 1,779 reviews	Search Japan 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 $332

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 8/18. 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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Philippine Airlines flights from State of Washington to Singapore

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

What is the cheapest month to fly to Singapore?

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

What is the cheapest Washington to Singapore flight route?

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

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

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

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

What airlines fly to Singapore?

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

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

Frequently asked questions about flying from 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?

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.

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