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Cheap flights from Washington to Singapore from $358

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 10/15. 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

Singapore Airlines Logo
9:45 am - 5:45 pmSEA-SIN
17h 00mnonstop
Singapore Airlines Logo
9:00 am - 7:10 amSIN-SEA
14h 10mnonstop
$681Singapore Airlines
Find Deal
sáb., nov. 1 - sáb., nov. 15
Philippine Airlines Logo
11:35 pm - 11:20 pmSEA-SIN
32h 45m1 stop
Philippine Airlines Logo
8:00 pm - 7:15 pmSIN-SEA
38h 15m1 stop
$682Philippine Airlines
Find Deal
vie., oct. 3 - mar., oct. 14
Logo
8:45 am - 5:45 pmSEA-SIN
17h 00mnonstop
Logo
7:45 pm - 7:35 pmSIN-SEA
38h 50m1 stop
$701
Find Deal
vie., ene. 23 - mar., mar. 31
Asiana Airlines Logo
12:10 am - 9:55 pmSEA-SIN
29h 45m1 stop
Asiana Airlines Logo
11:10 pm - 1:55 pmSIN-SEA
30h 45m1 stop
$706Asiana Airlines
Find Deal
mié., ene. 28 - dom., feb. 8
Asiana Airlines Logo
2:15 pm - 9:30 pmSEA-SIN
40h 15m1 stop
Asiana Airlines Logo
10:50 pm - 12:30 pmSIN-SEA
28h 40m1 stop
$707Asiana Airlines
Find Deal
dom., sep. 14 - lun., sep. 29
Korean Air Logo
12:50 pm - 5:00 amSEA-SIN
25h 10m1 stop
Korean Air Logo
1:10 am - 10:40 amSIN-SEA
24h 30m1 stop
$713Korean Air
Find Deal
jue., sep. 4 - mié., sep. 10
Air Canada Logo
7:15 pm - 7:05 amSEA-SIN
20h 50m1 stop
Air Canada Logo
9:10 am - 2:16 pmSIN-SEA
20h 06m1 stop
$715Air Canada
Find Deal
dom., ago. 31 - mar., sep. 23
Logo
8:45 am - 5:45 pmSEA-SIN
17h 00mnonstop
Logo
9:20 am - 4:36 pmSIN-SEA
23h 16m2 stops
$716
Find Deal
jue., ene. 29 - vie., feb. 6
Air Canada Logo
3:25 pm - 7:05 amPDX-SIN
24h 40m1 stop
Air Canada Logo
9:10 am - 2:46 pmSIN-PDX
20h 36m1 stop
$718Air Canada
Find Deal
mar., sep. 16 - mar., sep. 30
Korean Air Logo
8:55 am - 11:40 pmPDX-SIN
23h 45m2 stops
Korean Air Logo
7:30 am - 2:38 pmSIN-PDX
22h 08m2 stops
$844Korean Air
Find Deal
lun., sep. 1 - jue., sep. 4

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 4
SEA12:50 pmSeattle/Tacoma Intl
25h 10m
1 stop
SIN5:00 amSingapore Changi
Sep 10
SIN1:10 amSingapore Changi
24h 30m
1 stop
SEA10:40 amSeattle/Tacoma Intl
$713
Find similar
Korean Air
Aug 25
SEA7:10 amSeattle/Tacoma Intl
25h 30m
2 stops
SIN11:40 pmSingapore Changi
Sep 1
SIN10:30 pmSingapore Changi
27h 10m
1 stop
SEA10:40 amSeattle/Tacoma Intl
$765
Find similar
Korean Air
Aug 26
SEA3:05 pmSeattle/Tacoma Intl
37h 50m
2 stops
SIN7:55 pmSingapore Changi
Sep 1
SIN10:30 pmSingapore Changi
38h 55m
2 stops
SEA10:25 pmSeattle/Tacoma Intl
$776
Find similar

Air Canada flights from State of Washington to Singapore

Our best Air Canada deals on State of Washington to Singapore flight tickets
Air Canada
Aug 31
SEA7:15 pmSeattle/Tacoma Intl
20h 50m
1 stop
SIN7:05 amSingapore Changi
Sep 23
SIN9:10 amSingapore Changi
20h 06m
1 stop
SEA2:16 pmSeattle/Tacoma Intl
$715
Find similar
Air Canada
Sep 16
PDX3:25 pmPortland
24h 40m
1 stop
SIN7:05 amSingapore Changi
Sep 30
SIN9:10 amSingapore Changi
20h 36m
1 stop
PDX2:46 pmPortland
$718
Find similar
Air Canada
Oct 28
PDX7:00 pmPortland
21h 00m
1 stop
SIN7:00 amSingapore Changi
Nov 11
SIN9:00 pmSingapore Changi
33h 45m
2 stops
PDX2:45 pmPortland
$720
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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 agosto 18, 2025.
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

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

sáb. 11/1

9:45 am-5:45 pm

Nonstop17h 00m

Singapore Changi

sáb. 11/15

9:00 am-7:10 am

Nonstop14h 10m

$681

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

vie. 10/3

11:35 pm-11:20 pm

1 stop32h 45m

Singapore Changi

mar. 10/14

8:00 pm-7:15 pm

1 stop38h 15m

$682

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

vie. 1/23

8:45 am-5:45 pm

Nonstop17h 00m

Singapore Changi

mar. 3/31

7:45 pm-7:35 pm

1 stop38h 50m

$701

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

mié. 1/28

12:10 am-9:55 pm

1 stop29h 45m

Singapore Changi

dom. 2/8

11:10 pm-1:55 pm

1 stop30h 45m

$706

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

dom. 9/14

2:15 pm-9:30 pm

1 stop40h 15m

Singapore Changi

lun. 9/29

10:50 pm-12:30 pm

1 stop28h 40m

$707

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

jue. 9/4

12:50 pm-5:00 am

1 stop25h 10m

Singapore Changi

mié. 9/10

1:10 am-10:40 am

1 stop24h 30m

$713

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

dom. 8/31

7:15 pm-7:05 am

1 stop20h 50m

Singapore Changi

mar. 9/23

9:10 am-2:16 pm

1 stop20h 06m

$715

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

jue. 1/29

8:45 am-5:45 pm

Nonstop17h 00m

Singapore Changi

vie. 2/6

9:20 am-4:36 pm

2 stops23h 16m

$716

PortlandSingapore

PDX - SIN

PDXSIN

Portland

mar. 9/16

3:25 pm-7:05 am

1 stop24h 40m

Singapore Changi

mar. 9/30

9:10 am-2:46 pm

1 stop20h 36m

$718

PortlandSingapore

PDX - SIN

PDXSIN

Portland

lun. 9/1

8:55 am-11:40 pm

2 stops23h 45m

Singapore Changi

jue. 9/4

7:30 am-2:38 pm

2 stops22h 08m

$844

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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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 February is, on average, the cheapest month to fly to Singapore from State of Washington, with most prices found around $772. If you aren’t able to travel to Singapore during the month of February, then flying in March is also cheap. Prices for this month can be found on momondo for an average of $816.

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 Sunday when prices can be found for as low as $1,088. The most expensive day to fly to Singapore is Monday, with ticket prices averaging around $1,227.

What is the cheapest time of day to depart on your flight to Singapore?

At noon is the cheapest time of day to fly from State of Washington to Singapore when you can find flight prices for as low as $1,089. Flying to Singapore at noon 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 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 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 $954 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 $803 on momondo.

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

There are 4 cabin classes available to choose from on Washington to Singapore Changi 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

$358

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 $358. The best round-trip flight deal from State of Washington to Singapore found on momondo in the last 72 hours is $681.
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 near Singapore: Singapore Changi (SIN)
Search flight deals

  • 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
Singapore AirlinesPriceFrom $609Free CancellationRating
8.1
1,347 reviews
Search Singapore Airlines flights
Japan AirlinesPriceFrom $687Free CancellationRating
8.3
1,549 reviews
Search Japan Airlines flights
Asiana AirlinesPriceFrom $689Free CancellationRating
8.2
476 reviews
Search Asiana Airlines flights
Philippine AirlinesPriceFrom $694Free CancellationRating
7.2
895 reviews
Search Philippine Airlines flights
Air CanadaPriceFrom $712Free CancellationRating
7.1
9,992 reviews
Search Air Canada flights
United AirlinesPriceFrom $724Free CancellationRating
7.4
8,925 reviews
Search United Airlines flights
Korean AirPriceFrom $748Free CancellationRating
8.4
1,131 reviews
Search Korean Air flights
DeltaPriceFrom $750Free CancellationRating
8.0
7,981 reviews
Search Delta flights
ANAPriceFrom $802Free CancellationRating
8.4
934 reviews
Search ANA flights
China AirlinesPriceFrom $933Free CancellationRating
8.3
764 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?

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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