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

Qatar Airways, Singapore 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 3 per week as of May 2026. The most frequent departure day is Tue, with 33% of weekly flights leaving on this day.

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 77% 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.

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 25h 55m. Keep in mind that layovers or delays could extend your travel time.

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 May 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.

$414 Cheap Flights from Washington to Singapore in 2026

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One-way

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Cheap round-trip flights

Enter your travel dates to find the best prices.

9:45 am - 5:45 pm

SEA

SIN

17h 00mnonstop

9:00 am - 8:10 am

SIN

SEA

14h 10mnonstop

$653Singapore Airlines

Tue, Oct 27 - Sun, Nov 1

9:45 am - 5:45 pm

SEA

SIN

17h 00mnonstop

9:00 am - 8:10 am

SIN

SEA

14h 10mnonstop

$668Singapore Airlines

Tue, Oct 27 - Sun, Nov 1

9:45 am - 5:45 pm

SEA

SIN

17h 00mnonstop

9:00 am - 8:10 am

SIN

SEA

14h 10mnonstop

$675Singapore Airlines

Tue, Oct 27 - Sun, Nov 1

6:00 am - 5:35 pm

GEG

SIN

20h 35m

1 stop

9:00 am - 2:40 pm

SIN

GEG

20h 40m

1 stop

$861Multiple Airlines

Tue, Oct 13 - Thu, Oct 22

3:30 pm - 5:15 am

PDX

SIN

22h 45m

1 stop

7:00 am - 7:06 pm

SIN

PDX

27h 06m

1 stop

$945Air Canada

Fri, Sep 11 - Sun, Sep 27

10:10 am - 5:15 am

PDX

SIN

28h 05m

1 stop

7:00 am - 2:51 pm

SIN

PDX

22h 51m

1 stop

$952Air Canada

Tue, Aug 11 - Thu, Sep 10

7:43 pm - 5:35 pm

GEG

SIN

30h 52m

1 stop

9:00 am - 11:39 am

SIN

GEG

17h 39m

1 stop

$966Multiple Airlines

Fri, Oct 16 - Sun, Oct 25

6:30 am - 5:25 am

GEG

SIN

31h 55m

2 stops

3:25 am - 9:37 pm

SIN

GEG

33h 12m

2 stops

$1,062China Eastern

Fri, Oct 16 - Fri, Oct 23

1:57 pm - 8:50 am

GEG

SIN

51h 53m

2 stops

7:40 pm - 11:35 pm

SIN

GEG

42h 55m

2 stops

$1,190Qatar Airways

Sun, Oct 11 - Wed, Oct 21

1:57 pm - 8:50 am

GEG

SIN

51h 53m

2 stops

7:40 pm - 10:33 pm

SIN

GEG

41h 53m

2 stops

$1,217Qatar Airways

Sun, Oct 11 - Tue, Oct 20

Korean Air flights from State of Washington to Singapore

Our best Korean Air deals on State of Washington to Singapore flight tickets

Korean Air

Sep 22

SEA12:50 pmSeattle/Tacoma Intl

20h 05m

1 stop

SIN11:55 pmSingapore Changi

Oct 4

SIN10:00 pmSingapore Changi

27h 40m

1 stop

SEA10:40 amSeattle/Tacoma Intl

$823

Korean Air

Sep 1

SEA2:30 pmSeattle/Tacoma Intl

47h 30m

2 stops

SIN5:00 amSingapore Changi

Sep 13

SIN10:00 pmSingapore Changi

27h 40m

1 stop

SEA10:40 amSeattle/Tacoma Intl

$829

Korean Air

Sep 22

SEA12:50 pmSeattle/Tacoma Intl

20h 05m

1 stop

SIN11:55 pmSingapore Changi

Oct 4

SIN10:00 pmSingapore Changi

38h 51m

2 stops

SEA9:51 pmSeattle/Tacoma Intl

$835

Qatar Airways flights from State of Washington to Singapore

Our best Qatar Airways deals on State of Washington to Singapore flight tickets

Qatar Airways

Sep 27

PDX11:48 amPortland

30h 02m

2 stops

SIN8:50 amSingapore Changi

Oct 19

SIN3:15 amSingapore Changi

28h 45m

2 stops

PDX5:00 pmPortland

$1,007

Qatar Airways

Sep 27

PDX7:09 amPortland

34h 41m

2 stops

SIN8:50 amSingapore Changi

Oct 3

SIN3:15 amSingapore Changi

34h 47m

2 stops

PDX11:02 pmPortland

$1,047

Qatar Airways

Aug 17

PDX12:03 pmPortland

36h 42m

2 stops

SIN3:45 pmSingapore Changi

Aug 31

SIN3:15 amSingapore Changi

28h 34m

2 stops

PDX4:49 pmPortland

$1,052

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Quickest round-trip

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

Tue 10/27

9:45 am-5:45 pm

Nonstop17h 00m

Singapore Changi

Sun 11/1

9:00 am-8:10 am

Nonstop14h 10m

$653

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

Tue 10/27

9:45 am-5:45 pm

Nonstop17h 00m

Singapore Changi

Sun 11/1

9:00 am-8:10 am

Nonstop14h 10m

$668

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

Tue 10/27

9:45 am-5:45 pm

Nonstop17h 00m

Singapore Changi

Sun 11/1

9:00 am-8:10 am

Nonstop14h 10m

$675

SpokaneSingapore

GEG - SIN

GEGSIN

Spokane

Tue 10/13

6:00 am-5:35 pm

1 stop20h 35m

Singapore Changi

Thu 10/22

9:00 am-2:40 pm

1 stop20h 40m

$861

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Fri 9/11

3:30 pm-5:15 am

1 stop22h 45m

Singapore Changi

Sun 9/27

7:00 am-7:06 pm

1 stop27h 06m

$945

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Tue 8/11

10:10 am-5:15 am

1 stop28h 05m

Singapore Changi

Thu 9/10

7:00 am-2:51 pm

1 stop22h 51m

$952

SpokaneSingapore

GEG - SIN

GEGSIN

Spokane

Fri 10/16

7:43 pm-5:35 pm

1 stop30h 52m

Singapore Changi

Sun 10/25

9:00 am-11:39 am

1 stop17h 39m

$966

SpokaneSingapore

GEG - SIN

GEGSIN

Spokane

Fri 10/16

6:30 am-5:25 am

2 stops31h 55m

Singapore Changi

Fri 10/23

3:25 am-9:37 pm

2 stops33h 12m

$1,062

SpokaneSingapore

GEG - SIN

GEGSIN

Spokane

Sun 10/11

1:57 pm-8:50 am

2 stops51h 53m

Singapore Changi

Wed 10/21

7:40 pm-11:35 pm

2 stops42h 55m

$1,190

SpokaneSingapore

GEG - SIN

GEGSIN

Spokane

Sun 10/11

1:57 pm-8:50 am

2 stops51h 53m

Singapore Changi

Tue 10/20

7:40 pm-10:33 pm

2 stops41h 53m

$1,217

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 November is, on average, the cheapest month to fly to Singapore from State of Washington, with most prices found around $348. If you aren’t able to travel to Singapore during the month of November, then flying in May is also cheap. Prices for this month can be found on momondo for an average of $467.

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 $858. The most expensive day to fly to Singapore is Wednesday, with ticket prices averaging around $1,167.

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 from Washington 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 $852 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 $662 on momondo.

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

There are 3 cabin classes available to choose from on State of 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?

You could potentially save up to 41% on your flight if you consider stops on a State of Washington to Singapore flight.

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	$454
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 $454. The best round-trip flight deal from State of Washington to Singapore found on momondo in the last 72 hours is $864.

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 May 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 64.84% of all bookings. The subsequent popular models are Boeing 777-300 at 23.08%, Boeing 787-9 Dreamliner at 6.96%, and Airbus A330-200 at 1.83%.

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
Philippine Airlines	PriceFrom $348	Free Cancellation	Rating 7.3 997 reviews	Search Philippine Airlines flights
Singapore Airlines	PriceFrom $508	Free Cancellation	Rating 8.2 1,523 reviews	Search Singapore Airlines flights
Delta	PriceFrom $548	Free Cancellation	Rating 7.9 8,423 reviews	Search Delta flights
United Airlines	PriceFrom $621	Free Cancellation	Rating 7.4 9,751 reviews	Search United Airlines flights
Asiana Airlines	PriceFrom $656	Free Cancellation	Rating 8.1 535 reviews	Search Asiana Airlines flights
Air Canada	PriceFrom $699	Free Cancellation	Rating 7.1 11,095 reviews	Search Air Canada flights
Korean Air	PriceFrom $723	Free Cancellation	Rating 8.4 1,217 reviews	Search Korean Air flights
ANA	PriceFrom $750	Free Cancellation	Rating 8.3 1,216 reviews	Search ANA flights
Cathay Pacific	PriceFrom $774	Free Cancellation	Rating 7.6 1,346 reviews	Search Cathay Pacific flights
Japan Airlines	PriceFrom $792	Free Cancellation	Rating 8.3 1,827 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 $414

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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Korean Air 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 from Washington to Singapore?

What cabin class options are available on State of 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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List of cabin classes available on flights landing in Singapore. Availability may vary depending on flight origin and airline.

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