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 22h 45m. Keep in mind that layovers or delays could extend your travel time.

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 5 per week as of December 2025. The most frequent departure day is Tue, with 20% of weekly flights leaving on this day.

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 61% 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 December 2025, 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.

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

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One-way

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Cheap round-trip flights

Enter your travel dates to find the best prices.

7:05 pm - 2:30 pm

PDX

SIN

28h 25m2 stops

6:15 am - 6:30 pm

SIN

PDX

27h 15m2 stops

$782Air Canada

Mon, Apr 6 - Mon, Apr 20

10:05 am - 12:50 am

GEG

SIN

22h 45m2 stops

8:15 am - 12:44 pm

SIN

GEG

20h 29m2 stops

$787Multiple Airlines

Tue, Feb 3 - Tue, Feb 10

3:25 pm - 5:15 am

PDX

SIN

22h 50m1 stop

7:00 am - 2:45 pm

SIN

PDX

22h 45m1 stop

$795Air Canada

Tue, May 19 - Thu, Jun 4

7:45 pm - 5:15 am

PDX

SIN

18h 30m1 stop

8:10 am - 2:45 pm

SIN

PDX

21h 35m2 stops

$802Air Canada

Tue, May 19 - Thu, Jun 4

9:50 am - 7:00 am

PDX

SIN

30h 10m1 stop

11:55 pm - 2:40 pm

SIN

PDX

29h 45m2 stops

$808Air Canada

Thu, Mar 19 - Mon, Apr 20

10:15 am - 5:35 pm

SEA

SIN

16h 20mnonstop

9:00 am - 8:45 am

SIN

SEA

14h 45mnonstop

$812Singapore Airlines

Sun, Apr 12 - Sat, Apr 18

3:45 pm - 5:35 pm

SEA

SIN

33h 50m1 stop

10:20 pm - 1:20 pm

SIN

SEA

31h 00m1 stop

$814ANA

Tue, Jan 27 - Mon, Feb 2

11:43 am - 6:35 am

SEA

SIN

50h 52m2 stops

10:25 pm - 9:18 am

SIN

SEA

50h 53m2 stops

$815Japan Airlines

Sun, Jan 25 - Wed, Jan 28

10:15 am - 5:35 pm

SEA

SIN

16h 20mnonstop

8:45 pm - 8:59 am

SIN

SEA

27h 14m1 stop

$816Multiple Airlines

Fri, Apr 10 - Sun, Apr 19

9:45 am - 5:45 pm

SEA

SIN

17h 00mnonstop

9:00 am - 8:10 am

SIN

SEA

14h 10mnonstop

$819Singapore Airlines

Sat, Mar 21 - Sat, Mar 28

Cathay Pacific flights from State of Washington to Singapore

Our best Cathay Pacific deals on State of Washington to Singapore flight tickets

Cathay Pacific

Jan 8

SEA3:45 pmSeattle/Tacoma Intl

29h 20m

2 stops

SIN1:05 pmSingapore Changi

Jan 29

SIN12:55 pmSingapore Changi

27h 04m

2 stops

SEA11:59 pmSeattle/Tacoma Intl

$852

Find similar

Cathay Pacific

Feb 5

SEA6:20 amSeattle/Tacoma Intl

26h 05m

2 stops

SIN12:25 amSingapore Changi

Feb 15

SIN8:15 pmSingapore Changi

40h 43m

2 stops

SEA8:58 pmSeattle/Tacoma Intl

$867

Find similar

Cathay Pacific

Jan 8

PDX5:51 pmPortland

26h 04m

2 stops

SIN11:55 amSingapore Changi

Jan 26

SIN10:00 amSingapore Changi

26h 34m

2 stops

PDX8:34 pmPortland

$1,034

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Air Canada flights from State of Washington to Singapore

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

Air Canada

Apr 6

PDX7:05 pmPortland

28h 25m

2 stops

SIN2:30 pmSingapore Changi

Apr 20

SIN6:15 amSingapore Changi

27h 15m

2 stops

PDX6:30 pmPortland

$782

Find similar

Air Canada

May 19

PDX3:25 pmPortland

22h 50m

1 stop

SIN5:15 amSingapore Changi

Jun 4

SIN7:00 amSingapore Changi

22h 45m

1 stop

PDX2:45 pmPortland

$795

Find similar

Air Canada

May 19

PDX7:45 pmPortland

18h 30m

1 stop

SIN5:15 amSingapore Changi

Jun 4

SIN8:10 amSingapore Changi

21h 35m

2 stops

PDX2:45 pmPortland

$802

Find similar

momondo Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Mon 4/6

7:05 pm-2:30 pm

2 stops28h 25m

Singapore Changi

Mon 4/20

6:15 am-6:30 pm

2 stops27h 15m

$782

SpokaneSingapore

GEG - SIN

GEGSIN

Spokane

Tue 2/3

10:05 am-12:50 am

2 stops22h 45m

Singapore Changi

Tue 2/10

8:15 am-12:44 pm

2 stops20h 29m

$787

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Tue 5/19

3:25 pm-5:15 am

1 stop22h 50m

Singapore Changi

Thu 6/4

7:00 am-2:45 pm

1 stop22h 45m

$795

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Tue 5/19

7:45 pm-5:15 am

1 stop18h 30m

Singapore Changi

Thu 6/4

8:10 am-2:45 pm

2 stops21h 35m

$802

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Thu 3/19

9:50 am-7:00 am

1 stop30h 10m

Singapore Changi

Mon 4/20

11:55 pm-2:40 pm

2 stops29h 45m

$808

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

Sun 4/12

10:15 am-5:35 pm

Nonstop16h 20m

Singapore Changi

Sat 4/18

9:00 am-8:45 am

Nonstop14h 45m

$812

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

Tue 1/27

3:45 pm-5:35 pm

1 stop33h 50m

Singapore Changi

Mon 2/2

10:20 pm-1:20 pm

1 stop31h 00m

$814

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

Sun 1/25

11:43 am-6:35 am

2 stops50h 52m

Singapore Changi

Wed 1/28

10:25 pm-9:18 am

2 stops50h 53m

$815

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

Fri 4/10

10:15 am-5:35 pm

Nonstop16h 20m

Singapore Changi

Sun 4/19

8:45 pm-8:59 am

1 stop27h 14m

$816

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

Sat 3/21

9:45 am-5:45 pm

Nonstop17h 00m

Singapore Changi

Sat 3/28

9:00 am-8:10 am

Nonstop14h 10m

$819

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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 $986. The most expensive day to fly to Singapore is Wednesday, with ticket prices averaging around $1,172.

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 $1,071. 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 $902 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 $788 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	$325
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 $325. The best round-trip flight deal from State of Washington to Singapore found on momondo in the last 72 hours is $775.

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. The only airline offering direct flights is Singapore Airlines.

There are 2 airports in Singapore. From State of Washington there are direct flights to 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 December 2025, 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 76.61% of all bookings. The subsequent popular models are Boeing 777-300 at 19.76%, Boeing 787-9 Dreamliner at 1.61%, and Boeing 787-10 Dreamliner at 0.81%.

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 $594	Free Cancellation	Rating 8.1 1,419 reviews	Search Singapore Airlines flights
Philippine Airlines	PriceFrom $648	Free Cancellation	Rating 7.3 943 reviews	Search Philippine Airlines flights
Asiana Airlines	PriceFrom $662	Free Cancellation	Rating 8.2 499 reviews	Search Asiana Airlines flights
Japan Airlines	PriceFrom $687	Free Cancellation	Rating 8.3 1,662 reviews	Search Japan Airlines flights
Air Canada	PriceFrom $712	Free Cancellation	Rating 7.1 10,551 reviews	Search Air Canada flights
ANA	PriceFrom $718	Free Cancellation	Rating 8.4 1,040 reviews	Search ANA flights
United Airlines	PriceFrom $724	Free Cancellation	Rating 7.4 9,107 reviews	Search United Airlines flights
Korean Air	PriceFrom $736	Free Cancellation	Rating 8.4 1,185 reviews	Search Korean Air flights
Delta	PriceFrom $750	Free Cancellation	Rating 7.9 8,015 reviews	Search Delta flights
China Airlines	PriceFrom $933	Free Cancellation	Rating 8.3 792 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 3/22. 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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Cheap round-trip flights

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Cathay Pacific flights from State of Washington to Singapore

Our best Cathay Pacific deals on State of Washington to Singapore flight tickets

Air Canada flights from State of Washington to Singapore

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

momondo Fare Finder

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

See travel insights to Singapore from

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?

The cheapest day to depart from State of Washington to Singapore is on a Tuesday when prices can be found for as low as $986. The most expensive day to fly to Singapore is Wednesday, with ticket prices averaging around $1,172.

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 5 per week as of December 2025. 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?

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