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

United Airlines, Delta, and Korean Air are the most popular carriers operating from Washington to Singapore Changi

How long does it take to fly to Singapore?

The flight from State of Washington to Singapore depends on which airports you’re departing and arriving from and whether or not you have a layover. If you fly from Seattle (a popular airport in State of Washington) to Singapore (the most popular airport in Singapore), then the flight time is 16h 20m on average. If you fly from Spokane (another popular airport in State of Washington) to Singapore, then the average flight time is 25h 55m.

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 May 2026. 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 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.

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

Prices for flights from Washington to Singapore Changi Airport are updated daily.

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

As of May 2026, there are 12 operators available to choose from for flights from Washington to Singapore Changi Airport.

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

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 Changi Airport.

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

The required travel and health documents for your Singapore Changi Airport 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 Changi Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$388 Cheap Flights from Washington to Singapore in 2026

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Round-trip

One-way

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Cheap round-trip flights

Enter your travel dates to find the best prices.

8:45 am - 5:45 pm

SEA

SIN

17h 00mnonstop

9:00 am - 7:10 am

SIN

SEA

14h 10mnonstop

$653Singapore Airlines

Tue, Nov 3 - Tue, Nov 10

9:45 am - 5:45 pm

SEA

SIN

17h 00mnonstop

9:00 am - 8:10 am

SIN

SEA

14h 10mnonstop

$655Singapore Airlines

Tue, Oct 27 - Sun, Nov 1

10:15 am - 5:35 pm

SEA

SIN

16h 20mnonstop

9:00 am - 7:10 am

SIN

SEA

14h 10mnonstop

$699Singapore Airlines

Sat, Oct 24 - Tue, Nov 3

7:43 pm - 5:35 pm

GEG

SIN

30h 52m

1 stop

9:00 am - 2:40 pm

SIN

GEG

20h 40m

1 stop

$917Multiple Airlines

Wed, Oct 14 - Sat, Oct 24

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

7:00 am - 2:25 am

GEG

SIN

28h 25m

2 stops

4:15 pm - 11:35 pm

SIN

GEG

46h 20m

2 stops

$984Multiple Airlines

Thu, Sep 10 - Tue, Oct 27

11:48 am - 8:50 am

PDX

SIN

30h 02m

2 stops

3:15 am - 5:00 pm

SIN

PDX

28h 45m

2 stops

$1,007Qatar Airways

Sun, Sep 27 - Mon, Oct 19

7:45 pm - 5:15 am

PDX

SIN

18h 30m

1 stop

8:50 pm - 9:31 am

SIN

PDX

27h 41m

2 stops

$1,027Air Canada

Fri, Sep 11 - Sun, Sep 27

6:30 am - 10:00 pm

GEG

SIN

48h 30m

2 stops

12:25 am - 9:37 pm

SIN

GEG

36h 12m

2 stops

$1,062China Eastern

Mon, Oct 26 - Wed, Oct 28

7:00 am - 8:50 am

GEG

SIN

34h 50m

2 stops

7:40 pm - 11:35 pm

SIN

GEG

42h 55m

2 stops

$1,219Qatar Airways

Wed, Oct 14 - Sat, Oct 24

Air Canada flights from State of Washington to Singapore

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

Air Canada

Sep 11

SEA3:00 pmSeattle/Tacoma Intl

23h 15m

1 stop

SIN5:15 amSingapore Changi

Sep 20

SIN8:50 pmSingapore Changi

28h 02m

2 stops

SEA9:52 amSeattle/Tacoma Intl

$864

Air Canada

Oct 13

SEA3:00 pmSeattle/Tacoma Intl

23h 15m

1 stop

SIN5:15 amSingapore Changi

Oct 20

SIN7:00 amSingapore Changi

17h 52m

1 stop

SEA9:52 amSeattle/Tacoma Intl

$881

Air Canada

Oct 13

SEA7:20 pmSeattle/Tacoma Intl

18h 55m

1 stop

SIN5:15 amSingapore Changi

Oct 27

SIN8:50 amSingapore Changi

24h 32m

1 stop

SEA6:22 pmSeattle/Tacoma Intl

$886

United Airlines flights from State of Washington to Singapore

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

United Airlines

Sep 1

SEA5:00 amSeattle/Tacoma Intl

34h 15m

2 stops

SIN6:15 amSingapore Changi

Sep 14

SIN11:05 amSingapore Changi

18h 20m

1 stop

SEA2:25 pmSeattle/Tacoma Intl

$825

United Airlines

Sep 6

SEA6:52 pmSeattle/Tacoma Intl

32h 43m

2 stops

SIN6:35 pmSingapore Changi

Sep 21

SIN8:45 amSingapore Changi

20h 39m

1 stop

SEA2:24 pmSeattle/Tacoma Intl

$826

United Airlines

Sep 28

SEA7:11 amSeattle/Tacoma Intl

20h 24m

1 stop

SIN6:35 pmSingapore Changi

Oct 5

SIN11:05 amSingapore Changi

27h 21m

2 stops

SEA11:26 pmSeattle/Tacoma Intl

$831

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

Tue 11/3

8:45 am-5:45 pm

Nonstop17h 00m

Singapore Changi

Tue 11/10

9:00 am-7:10 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

$655

Quickest round-trip

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

Sat 10/24

10:15 am-5:35 pm

Nonstop16h 20m

Singapore Changi

Tue 11/3

9:00 am-7:10 am

Nonstop14h 10m

$699

SpokaneSingapore

GEG - SIN

GEGSIN

Spokane

Wed 10/14

7:43 pm-5:35 pm

1 stop30h 52m

Singapore Changi

Sat 10/24

9:00 am-2:40 pm

1 stop20h 40m

$917

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

SpokaneSingapore

GEG - SIN

GEGSIN

Spokane

Thu 9/10

7:00 am-2:25 am

2 stops28h 25m

Singapore Changi

Tue 10/27

4:15 pm-11:35 pm

2 stops46h 20m

$984

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Sun 9/27

11:48 am-8:50 am

2 stops30h 02m

Singapore Changi

Mon 10/19

3:15 am-5:00 pm

2 stops28h 45m

$1,007

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Fri 9/11

7:45 pm-5:15 am

1 stop18h 30m

Singapore Changi

Sun 9/27

8:50 pm-9:31 am

2 stops27h 41m

$1,027

SpokaneSingapore

GEG - SIN

GEGSIN

Spokane

Mon 10/26

6:30 am-10:00 pm

2 stops48h 30m

Singapore Changi

Wed 10/28

12:25 am-9:37 pm

2 stops36h 12m

$1,062

SpokaneSingapore

GEG - SIN

GEGSIN

Spokane

Wed 10/14

7:00 am-8:50 am

2 stops34h 50m

Singapore Changi

Sat 10/24

7:40 pm-11:35 pm

2 stops42h 55m

$1,219

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 $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 $413.

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 Changi flight route?

Fly from Seattle/Tacoma Intl to Singapore Changi for the best Washington - Singapore Changi 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	$474
Fastest flight time	16h 20m
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 $474. The best round-trip flight deal from State of Washington to Singapore found on momondo in the last 72 hours is $868.

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 is 1 airport 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 Changi Airport?
Prices for flights from Washington to Singapore Changi Airport are updated daily.
How many operators does momondo search for flights from Washington to Singapore Changi Airport?
As of May 2026, there are 12 operators available to choose from for flights from Washington to Singapore Changi Airport.
How old do you have to be to fly from Washington to Singapore Changi Airport?
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 Changi Airport.
What documentation or ID do you need to fly to Singapore Changi Airport?
The required travel and health documents for your Singapore Changi Airport 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 Changi Airport. 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 64.98% of all bookings. The subsequent popular models are Boeing 777-300 at 21.66%, Boeing 787-9 Dreamliner at 6.91%, and Airbus A330-200 at 2.30%.

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 7.3 998 reviews	Search Philippine Airlines flights
Singapore Airlines	PriceFrom $507	Free Cancellation	Rating 8.2 1,527 reviews	Search Singapore Airlines flights
Delta	PriceFrom $548	Free Cancellation	Rating 7.9 8,404 reviews	Search Delta flights
United Airlines	PriceFrom $621	Free Cancellation	Rating 7.4 9,769 reviews	Search United Airlines flights
Asiana Airlines	PriceFrom $656	Free Cancellation	Rating 8.1 535 reviews	Search Asiana Airlines flights
Korean Air	PriceFrom $674	Free Cancellation	Rating 8.4 1,217 reviews	Search Korean Air flights
Air Canada	PriceFrom $699	Free Cancellation	Rating 7.1 11,107 reviews	Search Air Canada flights
ANA	PriceFrom $750	Free Cancellation	Rating 8.3 1,219 reviews	Search ANA flights
Cathay Pacific	PriceFrom $774	Free Cancellation	Rating 7.6 1,353 reviews	Search Cathay Pacific flights
Japan Airlines	PriceFrom $792	Free Cancellation	Rating 8.3 1,834 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?

Yes. momondo enables you to select and highlight flights to Singapore from Washington with this policy.

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

Once you have performed a search for Washington to Singapore flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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

If you are not ready to book a flight from Washington to Singapore now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Singapore and let you know when they change.

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Cheap flights from Washington to Singapore from $388

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 9/23. 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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Air Canada 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 Changi 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 Changi?

What airlines fly to Singapore?

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

How long does it take to fly 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.

Get notified when prices go down

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

Find better results for your trip to Singapore

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.

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