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$295+ Cheap flights from Washington to Singapore

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/25. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SIN
Oct 15 — Oct 221
Wed 10/15
Wed 10/22
1 adult, Economy
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Cheap flight deals from Washington to Singapore

Keep the following information in mind while searching for Washington to Singapore flight deals. Data was last updated September 15, 2025.

Round-trip from

$624
(FlightHub)

One-way from

$295
(SmartFares)

Popular in

December

Cheapest in

February

Average price

$759

Good round-trip deal

$710 or less

Good one-way deal

$340 or less
From Washington to Singapore
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One-way flight from Washington to Singapore
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Highest demand for flights based on searches. 12% potential increase in price ($136 potential increase over avg. RT price).
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Cheapest flight prices on average. 6% potential price decrease ($56 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Price to beat on a round-trip flight from Washington to Singapore.
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Price to beat on a one-way flight from Washington to Singapore.
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Find flight deals from Washington to Singapore

Cheapest flights from Washington to Singapore
Explore the most affordable flight options available from Washington to Singapore. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 15, 2025.

This oojo deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/2110:15 amSEA - SIN
Nonstop16h 20mSingapore Airlines
Thu 10/309:00 amSIN - SEA
Nonstop14h 10mSingapore Airlines
Deal found 9/15$610
This Cheapflightsfares deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/1711:35 pmSEA - SIN
1 stop18h 50mPhilippine Airlines
Wed 10/152:35 pmSIN - SEA
1 stop19h 40mPhilippine Airlines
Deal found 9/15$631
This oojo deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/259:30 pmSEA - SIN
1 stop20h 05mPhilippine Airlines
Mon 12/18:10 pmSIN - SEA
1 stop38h 30mPhilippine Airlines
Deal found 9/14$649
This Trip.com deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/309:45 amSEA - SIN
Nonstop17h 00mSingapore Airlines
Thu 11/139:00 amSIN - SEA
Nonstop14h 10mSingapore Airlines
Deal found 9/14$651
This oojo deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/319:45 amSEA - SIN
Nonstop17h 00mSingapore Airlines
Fri 11/79:00 amSIN - SEA
Nonstop14h 10mSingapore Airlines
Deal found 9/14$653
This Cheapflightsfares deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/311:35 pmSEA - SIN
1 stop28h 20mPhilippine Airlines
Sun 10/122:35 pmSIN - SEA
1 stop19h 40mPhilippine Airlines
Deal found 9/13$655
This FlightHub deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/269:30 pmSEA - SIN
1 stop34h 10mPhilippine Airlines
Sat 11/2912:40 amSIN - SEA
1 stop34h 00mPhilippine Airlines
Deal found 9/14$657
This Philippine Airlines deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Philippine Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/511:35 pmSEA - SIN
1 stop28h 20mPhilippine Airlines
Wed 10/810:25 amSIN - SEA
1 stop23h 50mPhilippine Airlines
Deal found 9/13$668
This oojo deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/168:45 amSEA - SIN
Nonstop17h 00mSingapore Airlines
Tue 11/259:00 amSIN - SEA
Nonstop14h 10mSingapore Airlines
Deal found 9/14$670
This Philippine Airlines deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Philippine Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/169:30 pmSEA - SIN
1 stop29h 40mPhilippine Airlines
Wed 12/310:35 amSIN - SEA
1 stop24h 05mPhilippine Airlines
Deal found 9/15$682
This oojo deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/311:35 pmSEA - SIN
1 stop32h 45mPhilippine Airlines
Tue 10/148:00 pmSIN - SEA
1 stop38h 15mPhilippine Airlines
Deal found 9/14$687
This Air Canada deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/303:15 pmPDX - SIN
1 stop24h 45mAir Canada
Thu 11/68:50 amSIN - PDX
1 stop25h 40mAir Canada
Deal found 9/14$735

Cheapflights Fare Finder

 
Customize your flight search to find flights from 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, Cheapflights users made 2,558,603 searches. Data last updated September 15, 2025.
Use the filters below to find and compare flights from Washington to Singapore that are best for you.

Fly from

Washington

Fly to

Singapore

Route

Depart

Return

Price

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Thu 10/30

3:15 pm-7:00 am

1 stop24h 45m

Singapore Changi

Thu 11/6

8:50 am-6:30 pm

1 stop25h 40m

$735

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

Wed 10/29

12:00 pm-12:10 am

1 stop21h 10m

Singapore Changi

Wed 11/19

1:35 am-9:00 am

1 stop23h 25m

$759

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

Wed 10/29

12:41 pm-7:00 am

2 stops27h 19m

Singapore Changi

Thu 11/20

10:10 am-4:10 pm

2 stops22h 00m

$760

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

Wed 10/29

5:20 pm-7:00 am

1 stop22h 40m

Singapore Changi

Wed 11/5

10:10 am-9:13 pm

2 stops27h 03m

$760

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

Mon 11/3

7:00 am-8:15 pm

1 stop21h 15m

Singapore Changi

Wed 11/26

10:10 am-9:13 pm

3 stops27h 03m

$760

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

Thu 10/30

7:10 am-12:10 am

2 stops26h 00m

Singapore Changi

Wed 11/12

1:35 am-4:22 pm

2 stops30h 47m

$768

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Mon 2/16

9:50 am-4:55 am

2 stops27h 05m

Singapore Changi

Sun 3/1

8:50 am-6:30 pm

1 stop25h 40m

$772

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

Tue 11/18

12:10 am-9:55 pm

1 stop29h 45m

Singapore Changi

Fri 12/5

11:10 pm-1:55 pm

1 stop30h 45m

$782

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

Wed 10/1

7:00 am-6:25 pm

1 stop20h 25m

Singapore Changi

Sat 10/11

8:40 pm-4:24 pm

1 stop34h 44m

$798

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

Tue 11/11

11:00 am-8:25 pm

1 stop41h 25m

Singapore Changi

Fri 11/21

1:35 am-9:00 am

1 stop23h 25m

$809

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/15

Showing 1-10 of 39 results
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Best time to book a flight from Washington to Singapore

Have a flexible travel schedule? Discover the best time to fly to Singapore from Washington with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Washington to Singapore

What is the cheapest month to book a flight from State of Washington to Singapore?

Currently, October is the cheapest month in which you can book a flight from State of Washington to Singapore (average of $1,002). Flying from State of Washington to Singapore in December is currently the most expensive (average of $1,665). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from WA to SG?

Find hourly flight availability from Washington to Singapore. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 15, 2025.

When flying from State of Washington to Singapore, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Related info for your journey

Find useful and relevant information for your journey from Washington to Singapore. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How popular is this State of Washington to Singapore flight route?

    The Washington to Singapore flight path was viewed by 88 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

  • How long is the flight from State of Washington to Singapore?

    There are many flights that can get you from State of Washington to Singapore in 21h 10m. Fly via Air Canada, Korean Air, or United Airlines to get the fastest option. State of Washington and Singapore are separated by a distance of 8059 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines to fly from State of Washington to Singapore one-way?

    The cheapest airlines for a one-way flight from State of Washington to Singapore are Asiana Airlines ($378), Philippine Airlines ($379), and Air Canada ($400).

  • Can I find deals for flights from Washington to Singapore that include hotel bookings?

    Yes. In addition to deals on Washington to Singapore flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Washington to Singapore?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Washington to Singapore.

  • Can I find deals for business class flights from Washington to Singapore?

    Yes. Cheapflights offers flight deals from Washington to Singapore by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from State of Washington to Singapore?

    Currently, October is the cheapest month in which you can book a flight from State of Washington to Singapore (average of $1,002). Flying from State of Washington to Singapore in December is currently the most expensive (average of $1,665). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Top 10 airlines flying from Washington to Singapore

Discover the top 10 airlines that operate flights from Washington to Singapore. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated September 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
Singapore AirlinesCheapest$597Average$926FlexibilityNo cancel feeOn-time81%
Japan AirlinesCheapest$687Average$809FlexibilityNo cancel feeOn-time79%
Asiana AirlinesCheapest$689Average$782FlexibilityNo cancel feeOn-time76%
Philippine AirlinesCheapest$694Average$750FlexibilityNo cancel feeOn-time60%
Air CanadaCheapest$713Average$877FlexibilityNo cancel feeOn-time67%
ANACheapest$718Average$1,127FlexibilityNo cancel feeOn-time80%
United AirlinesCheapest$724Average$888FlexibilityNo cancel feeOn-time69%
Korean AirCheapest$744Average$973FlexibilityNo cancel feeOn-time81%
DeltaCheapest$750Average$938FlexibilityNo cancel feeOn-timeN/A
China AirlinesCheapest$933Average$1,113FlexibilityNo cancel feeOn-time70%

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