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

United Airlines and Air Canada are the most popular carriers operating from Washington to Singapore

What airlines fly to Singapore?

Singapore Airlines, United Airlines and Philippine Airlines 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 79% 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 34m. Keep in mind that layovers or delays could extend your travel time.

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 September 2026. The most frequent departure day is Tue, with 20% 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 September 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.

$391 Cheap Flights from Washington to Singapore in 2026/27

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Find the cheapest flights from Washington to Singapore

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

8:40 am - 5:45 pmSEA Seattle/Tacoma Intl-SIN Singapore Changi

17h 05mnonstop

8:55 am - 7:05 amSIN Singapore Changi-SEA Seattle/Tacoma Intl

14h 10mnonstop

$728Singapore Airlines

Tue, Dec 1 - Wed, Dec 23

10:10 am - 7:00 amSEA Seattle/Tacoma Intl-SIN Singapore Changi

29h 50m1 stop Vancouver Intl

8:40 am - 2:37 pmSIN Singapore Changi-SEA Seattle/Tacoma Intl

21h 57m1 stop Vancouver Intl

$745Air Canada

Wed, Oct 28 - Sun, Nov 8

7:05 pm - 7:00 amSEA Seattle/Tacoma Intl-SIN Singapore Changi

19h 55m1 stop Vancouver Intl

8:40 am - 6:22 pmSIN Singapore Changi-SEA Seattle/Tacoma Intl

25h 42m1 stop Vancouver Intl

$745Air Canada

Thu, Nov 5 - Sat, Nov 14

8:40 am - 5:45 pmSEA Seattle/Tacoma Intl-SIN Singapore Changi

17h 05mnonstop

8:55 am - 8:05 amSIN Singapore Changi-SEA Seattle/Tacoma Intl

14h 10mnonstop

$750Singapore Airlines

Fri, Mar 12 - Sat, Mar 27

8:40 am - 7:00 amSEA Seattle/Tacoma Intl-SIN Singapore Changi

30h 20m1 stop Vancouver Intl

8:40 am - 9:32 amSIN Singapore Changi-SEA Seattle/Tacoma Intl

16h 52m1 stop Vancouver Intl

$766EVA Air

Thu, Jan 21 - Tue, Jan 26

7:05 pm - 7:00 amSEA Seattle/Tacoma Intl-SIN Singapore Changi

19h 55m1 stop Vancouver Intl

8:40 am - 6:22 pmSIN Singapore Changi-SEA Seattle/Tacoma Intl

25h 42m1 stop Vancouver Intl

$766Multiple Airlines

Thu, Nov 5 - Thu, Nov 26

7:05 pm - 7:00 amSEA Seattle/Tacoma Intl-SIN Singapore Changi

19h 55m1 stop Vancouver Intl

8:40 am - 9:32 amSIN Singapore Changi-SEA Seattle/Tacoma Intl

16h 52m1 stop Vancouver Intl

$766Multiple Airlines

Tue, Nov 3 - Thu, Nov 26

11:00 am - 12:15 amSEA Seattle/Tacoma Intl-SIN Singapore Changi

21h 15m1 stop Incheon Intl

10:30 am - 2:10 pmSIN Singapore Changi-SEA Seattle/Tacoma Intl

19h 40m1 stop Incheon Intl

$789Korean Air

Mon, Nov 2 - Mon, Nov 9

12:50 pm - 11:55 pmSEA Seattle/Tacoma Intl-SIN Singapore Changi

20h 05m1 stop Incheon Intl

1:40 am - 10:05 amSIN Singapore Changi-SEA Seattle/Tacoma Intl

23h 25m1 stop Incheon Intl

$792Korean Air

Tue, Oct 20 - Wed, Oct 28

12:10 am - 12:05 pmSEA Seattle/Tacoma Intl-SIN Singapore Changi

19h 55m1 stop Taipei City Taiwan Taoyuan Intl

3:45 pm - 5:30 pmSIN Singapore Changi-SEA Seattle/Tacoma Intl

17h 45m1 stop Taipei City Taiwan Taoyuan Intl

$1,107EVA Air

Tue, Feb 16 - Thu, Feb 18

Cheap last minute flights

Enter your travel dates to find the best prices.

1:22 pm - 6:15 amSEA Seattle/Tacoma Intl-SIN Singapore Changi

25h 53m1 stop San Francisco

8:45 am - 9:01 pmSIN Singapore Changi-SEA Seattle/Tacoma Intl

27h 16m1 stop San Francisco

$821United Airlines

Mon, Sep 21 - Fri, Sep 25

4:30 pm - 6:15 amSEA Seattle/Tacoma Intl-SIN Singapore Changi

22h 45m2 stops Los Angeles San Francisco

8:45 am - 2:22 pmSIN Singapore Changi-SEA Seattle/Tacoma Intl

20h 37m1 stop San Francisco

$821United Airlines

Mon, Sep 21 - Fri, Sep 25

12:10 am - 9:30 pmSEA Seattle/Tacoma Intl-SIN Singapore Changi

30h 20m1 stop Incheon Intl

9:00 am - 8:25 amSIN Singapore Changi-SEA Seattle/Tacoma Intl

14h 25mnonstop

$924Multiple Airlines

Thu, Sep 24 - Fri, Oct 2

11:10 pm - 9:05 amSEA Seattle/Tacoma Intl-SIN Singapore Changi

18h 55m1 stop Manila Ninoy Aquino Intl

2:30 pm - 8:05 pmSIN Singapore Changi-SEA Seattle/Tacoma Intl

20h 35m1 stop Manila Ninoy Aquino Intl

$932Philippine Airlines

Fri, Sep 25 - Fri, Oct 2

10:15 am - 5:35 pmSEA Seattle/Tacoma Intl-SIN Singapore Changi

16h 20mnonstop

9:00 am - 8:25 amSIN Singapore Changi-SEA Seattle/Tacoma Intl

14h 25mnonstop

$954Singapore Airlines

Fri, Sep 25 - Fri, Oct 2

12:10 am - 9:30 pmSEA Seattle/Tacoma Intl-SIN Singapore Changi

30h 20m1 stop Incheon Intl

7:55 am - 8:05 pmSIN Singapore Changi-SEA Seattle/Tacoma Intl

27h 10m2 stops Kuala Lumpur Intl Manila Ninoy Aquino Intl

$959Multiple Airlines

Thu, Sep 24 - Fri, Oct 2

11:02 pm - 5:15 amPDX Portland-SIN Singapore Changi

39h 13m2 stops Chicago O'Hare Intl Vancouver Intl

7:00 am - 9:31 amSIN Singapore Changi-PDX Portland

17h 31m1 stop Vancouver Intl

$1,074Air Canada

Mon, Sep 21 - Sun, Oct 4

7:15 am - 5:00 amSEA Seattle/Tacoma Intl-SIN Singapore Changi

30h 45m2 stops San Francisco Incheon Intl

10:00 pm - 10:05 pmSIN Singapore Changi-SEA Seattle/Tacoma Intl

39h 05m2 stops Incheon Intl Los Angeles

$1,077Korean Air

Thu, Sep 24 - Sat, Sep 26

10:15 am - 5:35 pmSEA Seattle/Tacoma Intl-SIN Singapore Changi

16h 20mnonstop

9:00 am - 8:25 amSIN Singapore Changi-SEA Seattle/Tacoma Intl

14h 25mnonstop

$1,131Singapore Airlines

Thu, Sep 24 - Sat, Oct 10

1:30 am - 11:55 amSEA Seattle/Tacoma Intl-SIN Singapore Changi

19h 25m1 stop Taipei City Taiwan Taoyuan Intl

3:20 pm - 7:40 pmSIN Singapore Changi-SEA Seattle/Tacoma Intl

19h 20m1 stop Taipei City Taiwan Taoyuan Intl

$1,237EVA Air

Thu, Sep 24 - Sat, Sep 26

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Singapore Airlines flights from State of Washington to Singapore

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

Singapore Airlines

Oct 25

SEA9:40 amSeattle/Tacoma Intl

17h 05m

SIN5:45 pmSingapore Changi

Nov 8

SIN8:55 amSingapore Changi

14h 10m

SEA7:05 amSeattle/Tacoma Intl

$721

Singapore Airlines

Dec 1

SEA8:40 amSeattle/Tacoma Intl

17h 05m

SIN5:45 pmSingapore Changi

Dec 23

SIN8:55 amSingapore Changi

14h 10m

SEA7:05 amSeattle/Tacoma Intl

$728

Singapore Airlines

Mar 12

SEA8:40 amSeattle/Tacoma Intl

17h 05m

SIN5:45 pmSingapore Changi

Mar 27

SIN8:55 amSingapore Changi

14h 10m

SEA8:05 amSeattle/Tacoma Intl

$750

Air Canada flights from State of Washington to Singapore

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

Air Canada

Oct 28

SEA10:10 amSeattle/Tacoma Intl

29h 50m

1 stop

SIN7:00 amSingapore Changi

Nov 8

SIN8:40 amSingapore Changi

21h 57m

1 stop

SEA2:37 pmSeattle/Tacoma Intl

$745

Air Canada

Nov 22

SEA3:15 pmSeattle/Tacoma Intl

23h 45m

1 stop

SIN7:00 amSingapore Changi

Dec 15

SIN8:40 amSingapore Changi

21h 57m

1 stop

SEA2:37 pmSeattle/Tacoma Intl

$752

Air Canada

Nov 4

SEA7:05 pmSeattle/Tacoma Intl

19h 55m

1 stop

SIN7:00 amSingapore Changi

Nov 24

SIN8:40 amSingapore Changi

29h 17m

1 stop

SEA9:57 pmSeattle/Tacoma Intl

$763

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

Cheapest round-trip

Quickest round-trip

SeattleSingapore

SEA Seattle/Tacoma Intl - SIN Singapore Changi

SEASIN

Seattle/Tacoma Intl

Tue 12/1

8:40 am-5:45 pm

Nonstop17h 05m

Singapore Changi

Wed 12/23

8:55 am-7:05 am

Nonstop14h 10m

$728

SeattleSingapore

SEA Seattle/Tacoma Intl - SIN Singapore Changi

SEASIN

Seattle/Tacoma Intl

Wed 10/28

10:10 am-7:00 am

1 stop29h 50m

Singapore Changi

Sun 11/8

8:40 am-2:37 pm

1 stop21h 57m

$745

SeattleSingapore

SEA Seattle/Tacoma Intl - SIN Singapore Changi

SEASIN

Seattle/Tacoma Intl

Thu 11/5

7:05 pm-7:00 am

1 stop19h 55m

Singapore Changi

Sat 11/14

8:40 am-6:22 pm

1 stop25h 42m

$745

SeattleSingapore

SEA Seattle/Tacoma Intl - SIN Singapore Changi

SEASIN

Seattle/Tacoma Intl

Fri 3/12

8:40 am-5:45 pm

Nonstop17h 05m

Singapore Changi

Sat 3/27

8:55 am-8:05 am

Nonstop14h 10m

$750

SeattleSingapore

SEA Seattle/Tacoma Intl - SIN Singapore Changi

SEASIN

Seattle/Tacoma Intl

Thu 1/21

8:40 am-7:00 am

1 stop30h 20m

Singapore Changi

Tue 1/26

8:40 am-9:32 am

1 stop16h 52m

$766

SeattleSingapore

SEA Seattle/Tacoma Intl - SIN Singapore Changi

SEASIN

Seattle/Tacoma Intl

Thu 11/5

7:05 pm-7:00 am

1 stop19h 55m

Singapore Changi

Thu 11/26

8:40 am-6:22 pm

1 stop25h 42m

$766

SeattleSingapore

SEA Seattle/Tacoma Intl - SIN Singapore Changi

SEASIN

Seattle/Tacoma Intl

Tue 11/3

7:05 pm-7:00 am

1 stop19h 55m

Singapore Changi

Thu 11/26

8:40 am-9:32 am

1 stop16h 52m

$766

SeattleSingapore

SEA Seattle/Tacoma Intl - SIN Singapore Changi

SEASIN

Seattle/Tacoma Intl

Mon 11/2

11:00 am-12:15 am

1 stop21h 15m

Singapore Changi

Mon 11/9

10:30 am-2:10 pm

1 stop19h 40m

$789

SeattleSingapore

SEA Seattle/Tacoma Intl - SIN Singapore Changi

SEASIN

Seattle/Tacoma Intl

Tue 10/20

12:50 pm-11:55 pm

1 stop20h 05m

Singapore Changi

Wed 10/28

1:40 am-10:05 am

1 stop23h 25m

$792

SeattleSingapore

SEA Seattle/Tacoma Intl - SIN Singapore Changi

SEASIN

Seattle/Tacoma Intl

Tue 2/16

12:10 am-12:05 pm

1 stop19h 55m

Singapore Changi

Thu 2/18

3:45 pm-5:30 pm

1 stop17h 45m

$1,107

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

Airlines

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 $708. 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 $738.

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 $926. The most expensive day to fly to Singapore is Wednesday, with ticket prices averaging around $1,121.

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 $895 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 $700 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?

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	$391
Fastest flight time	16h 20m
Direct flights	Mon, Wed, Thu, 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 $391. The best round-trip flight deal from State of Washington to Singapore found on momondo in the last 72 hours is $728.

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

Direct flights go from State of Washington to Singapore on Monday, Wednesday, Thursday, 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 September 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 71.67% of all bookings. The subsequent popular models are Boeing 777-300 at 18.75%, Boeing 787-9 Dreamliner at 3.75%, and Airbus A330-200 at 2.08%.

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 1,027 reviews	Search Philippine Airlines flights
Delta	PriceFrom $498	Free Cancellation	Rating 7.8 8,593 reviews	Search Delta flights
Singapore Airlines	PriceFrom $506	Free Cancellation	Rating 8.2 1,606 reviews	Search Singapore Airlines flights
Air Canada	PriceFrom $534	Free Cancellation	Rating 7.1 11,657 reviews	Search Air Canada flights
Asiana Airlines	PriceFrom $610	Free Cancellation	Rating 8.1 562 reviews	Search Asiana Airlines flights
United Airlines	PriceFrom $621	Free Cancellation	Rating 7.4 10,225 reviews	Search United Airlines flights
Korean Air	PriceFrom $624	Free Cancellation	Rating 8.4 1,218 reviews	Search Korean Air flights
ANA	PriceFrom $750	Free Cancellation	Rating 8.3 1,317 reviews	Search ANA flights
Cathay Pacific	PriceFrom $774	Free Cancellation	Rating 7.6 1,490 reviews	Search Cathay Pacific flights
Japan Airlines	PriceFrom $794	Free Cancellation	Rating 8.3 1,916 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 $391

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 9/29. 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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Singapore Airlines flights from State of Washington to Singapore

Our best Singapore Airlines 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?

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

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.

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

State of Washington flight routes

According to popular flight searches on momondo this year

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According to popular flight searches on momondo this year

Fly your favorite airline to Singapore

Airlines are sorted and displayed according to clicks in the past 7 days on momondo

Cabin classes currently available on flights to Singapore

List of cabin classes available on flights landing in Singapore. Availability may vary depending on flight origin and airline.

Complete your trip to Singapore

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