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Cheap flights from Washington to Singapore from $382

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 8/6. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Washington to Singapore

Cheap round-trip flights

Enter your travel dates to find the best prices.
Singapore Airlines Logo
10:15 am - 5:35 pm
SEA
-
SIN
16h 20mnonstop
Singapore Airlines Logo
9:00 am - 8:45 am
SIN
-
SEA
14h 45mnonstop
$672Singapore Airlines
Thu, Oct 8 - Sat, Oct 24
Singapore Airlines Logo
10:15 am - 5:35 pm
SEA
-
SIN
16h 20mnonstop
Singapore Airlines Logo
9:00 am - 8:45 am
SIN
-
SEA
14h 45mnonstop
$675Singapore Airlines
Thu, Oct 8 - Thu, Oct 15
Singapore Airlines Logo
10:15 am - 5:35 pm
SEA
-
SIN
16h 20mnonstop
Singapore Airlines Logo
9:00 am - 8:45 am
SIN
-
SEA
14h 45mnonstop
$683Singapore Airlines
Thu, Oct 8 - Thu, Oct 15
Korean Air Logo
3:55 pm - 7:15 pm
SEA
-
SIN
36h 20m
2 stops
Korean Air Logo
1:25 am - 8:39 pm
SIN
-
SEA
34h 14m
2 stops
$752Korean Air
Tue, Sep 8 - Mon, Sep 14
Korean Air Logo
3:55 pm - 7:15 pm
SEA
-
SIN
36h 20m
2 stops
Korean Air Logo
10:00 pm - 10:40 am
SIN
-
SEA
27h 40m
1 stop
$753Korean Air
Tue, Sep 8 - Tue, Sep 15
Air Canada Logo
3:15 pm - 7:00 am
PDX
-
SIN
23h 45m
1 stop
Air Canada Logo
8:40 am - 9:26 am
SIN
-
PDX
16h 46m
1 stop
$918Air Canada
Tue, Nov 3 - Tue, Nov 17
Air Canada Logo
10:00 am - 7:00 am
PDX
-
SIN
29h 00m
1 stop
Air Canada Logo
8:40 am - 6:30 pm
SIN
-
PDX
24h 50m
1 stop
$926Air Canada
Tue, Jan 19 - Tue, Mar 23
Japan Airlines Logo
8:31 am - 12:20 am
GEG
-
SIN
24h 49m
2 stops
Japan Airlines Logo
8:05 am - 1:45 pm
SIN
-
GEG
20h 40m
2 stops
$934Japan Airlines
Mon, Sep 7 - Mon, Sep 14
Multiple Airlines Logo
7:19 am - 5:15 am
PDX
-
SIN
30h 56m
2 stops
Multiple Airlines Logo
4:55 pm - 4:36 pm
SIN
-
PDX
38h 41m
2 stops
$965Multiple Airlines
Mon, Aug 17 - Tue, Sep 1
Multiple Airlines Logo
5:52 am - 12:20 am
GEG
-
SIN
27h 28m
2 stops
Multiple Airlines Logo
8:05 am - 10:38 pm
SIN
-
GEG
29h 33m
2 stops
$979Multiple Airlines
Tue, Sep 8 - Tue, Sep 15

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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 8
SEA10:15 amSeattle/Tacoma Intl
16h 20m
SIN5:35 pmSingapore Changi
Oct 24
SIN9:00 amSingapore Changi
14h 45m
SEA8:45 amSeattle/Tacoma Intl
$672
Singapore Airlines
Oct 8
SEA10:15 amSeattle/Tacoma Intl
16h 20m
SIN5:35 pmSingapore Changi
Oct 15
SIN9:00 amSingapore Changi
14h 45m
SEA8:45 amSeattle/Tacoma Intl
$675
Singapore Airlines
Oct 8
SEA10:15 amSeattle/Tacoma Intl
16h 20m
SIN5:35 pmSingapore Changi
Oct 15
SIN9:00 amSingapore Changi
14h 45m
SEA8:45 amSeattle/Tacoma Intl
$683

Asiana Airlines flights from State of Washington to Singapore

Our best Asiana Airlines deals on State of Washington to Singapore flight tickets
Asiana Airlines
Aug 2
SEA12:10 amSeattle/Tacoma Intl
30h 20m
1 stop
SIN9:30 pmSingapore Changi
Aug 10
SIN10:50 pmSingapore Changi
31h 55m
1 stop
SEA3:45 pmSeattle/Tacoma Intl
$785
Asiana Airlines
Sep 1
SEA12:10 amSeattle/Tacoma Intl
30h 20m
1 stop
SIN9:30 pmSingapore Changi
Sep 6
SIN10:50 pmSingapore Changi
31h 25m
1 stop
SEA3:15 pmSeattle/Tacoma Intl
$786
Asiana Airlines
Sep 13
SEA12:10 amSeattle/Tacoma Intl
30h 20m
1 stop
SIN9:30 pmSingapore Changi
Sep 21
SIN10:50 pmSingapore Changi
31h 25m
1 stop
SEA3:15 pmSeattle/Tacoma Intl
$787

momondo Fare Finder

 
Customize your flight search to find flights from State of Washington to Singapore that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated July 26, 2026.
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 - SIN

SEASIN

Seattle/Tacoma Intl

Thu 10/8

10:15 am-5:35 pm

Nonstop16h 20m

Singapore Changi

Sat 10/24

9:00 am-8:45 am

Nonstop14h 45m

$672

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

Thu 10/8

10:15 am-5:35 pm

Nonstop16h 20m

Singapore Changi

Thu 10/15

9:00 am-8:45 am

Nonstop14h 45m

$675

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

Thu 10/8

10:15 am-5:35 pm

Nonstop16h 20m

Singapore Changi

Thu 10/15

9:00 am-8:45 am

Nonstop14h 45m

$683

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

Tue 9/8

3:55 pm-7:15 pm

2 stops36h 20m

Singapore Changi

Mon 9/14

1:25 am-8:39 pm

2 stops34h 14m

$752

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

Tue 9/8

3:55 pm-7:15 pm

2 stops36h 20m

Singapore Changi

Tue 9/15

10:00 pm-10:40 am

1 stop27h 40m

$753

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Tue 11/3

3:15 pm-7:00 am

1 stop23h 45m

Singapore Changi

Tue 11/17

8:40 am-9:26 am

1 stop16h 46m

$918

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Tue 1/19

10:00 am-7:00 am

1 stop29h 00m

Singapore Changi

Tue 3/23

8:40 am-6:30 pm

1 stop24h 50m

$926

SpokaneSingapore

GEG - SIN

GEGSIN

Spokane

Mon 9/7

8:31 am-12:20 am

2 stops24h 49m

Singapore Changi

Mon 9/14

8:05 am-1:45 pm

2 stops20h 40m

$934

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Mon 8/17

7:19 am-5:15 am

2 stops30h 56m

Singapore Changi

Tue 9/1

4:55 pm-4:36 pm

2 stops38h 41m

$965

SpokaneSingapore

GEG - SIN

GEGSIN

Spokane

Tue 9/8

5:52 am-12:20 am

2 stops27h 28m

Singapore Changi

Tue 9/15

8:05 am-10:38 pm

2 stops29h 33m

$979

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
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See travel insights to Singapore from

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

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 $719. If you aren’t able to travel to Singapore during the month of November, 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 Monday, with ticket prices averaging around $1,095.

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 $855 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 $671 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 31% 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

$418

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 $418. The best round-trip flight deal from State of Washington to Singapore found on momondo in the last 72 hours is $792.
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 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?

  • 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?

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 AirlinesPriceFrom $348Free CancellationRating
7.3
1,011 reviews
Search Philippine Airlines flights
Singapore AirlinesPriceFrom $507Free CancellationRating
8.2
1,583 reviews
Search Singapore Airlines flights
Air CanadaPriceFrom $534Free CancellationRating
7.1
11,391 reviews
Search Air Canada flights
DeltaPriceFrom $548Free CancellationRating
7.8
8,484 reviews
Search Delta flights
Asiana AirlinesPriceFrom $610Free CancellationRating
8.1
555 reviews
Search Asiana Airlines flights
United AirlinesPriceFrom $621Free CancellationRating
7.4
10,042 reviews
Search United Airlines flights
Korean AirPriceFrom $624Free CancellationRating
8.4
1,221 reviews
Search Korean Air flights
ANAPriceFrom $750Free CancellationRating
8.3
1,283 reviews
Search ANA flights
Cathay PacificPriceFrom $774Free CancellationRating
7.6
1,431 reviews
Search Cathay Pacific flights
Japan AirlinesPriceFrom $793Free CancellationRating
8.3
1,880 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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Fly your favorite airline to Singapore

Airlines are sorted and displayed according to clicks in the past 7 days on momondo
Singapore Airlines
United Airlines
Philippine Airlines
Asiana Airlines
Air Canada
ANA
Delta
EVA Air
Japan Airlines
Cathay Pacific
Korean Air