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$295+ Cheap flights from Washington to Singapore (SIN)

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
mié. 10/15
mié. 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 septiembre 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 Changi
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One-way flight from Washington to Singapore Changi
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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 Changi.
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Price to beat on a one-way flight from Washington to Singapore Changi.
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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 septiembre 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.
mar. 10/2110:15 amSEA - SIN
Nonstop16h 20mSingapore Airlines
jue. 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.
mié. 9/1711:35 pmSEA - SIN
1 stop18h 50mPhilippine Airlines
mié. 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.
mar. 11/259:30 pmSEA - SIN
1 stop20h 05mPhilippine Airlines
lun. 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.
jue. 10/309:45 amSEA - SIN
Nonstop17h 00mSingapore Airlines
jue. 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.
vie. 10/319:45 amSEA - SIN
Nonstop17h 00mSingapore Airlines
vie. 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.
vie. 10/311:35 pmSEA - SIN
1 stop28h 20mPhilippine Airlines
dom. 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.
mié. 11/269:30 pmSEA - SIN
1 stop34h 10mPhilippine Airlines
sáb. 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.
dom. 10/511:35 pmSEA - SIN
1 stop28h 20mPhilippine Airlines
mié. 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.
dom. 11/168:45 amSEA - SIN
Nonstop17h 00mSingapore Airlines
mar. 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.
dom. 11/169:30 pmSEA - SIN
1 stop29h 40mPhilippine Airlines
mié. 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.
vie. 10/311:35 pmSEA - SIN
1 stop32h 45mPhilippine Airlines
mar. 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.
jue. 10/303:15 pmPDX - SIN
1 stop24h 45mAir Canada
jue. 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 septiembre 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

jue. 10/30

3:15 pm-7:00 am

1 stop24h 45m

Singapore Changi

jue. 11/6

8:50 am-6:30 pm

1 stop25h 40m

$735

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

mié. 10/29

12:00 pm-12:10 am

1 stop21h 10m

Singapore Changi

mié. 11/19

1:35 am-9:00 am

1 stop23h 25m

$759

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

mié. 10/29

12:41 pm-7:00 am

2 stops27h 19m

Singapore Changi

jue. 11/20

10:10 am-4:10 pm

2 stops22h 00m

$760

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

mié. 10/29

5:20 pm-7:00 am

1 stop22h 40m

Singapore Changi

mié. 11/5

10:10 am-9:13 pm

2 stops27h 03m

$760

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

lun. 11/3

7:00 am-8:15 pm

1 stop21h 15m

Singapore Changi

mié. 11/26

10:10 am-9:13 pm

3 stops27h 03m

$760

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

jue. 10/30

7:10 am-12:10 am

2 stops26h 00m

Singapore Changi

mié. 11/12

1:35 am-4:22 pm

2 stops30h 47m

$768

PortlandSingapore

PDX - SIN

PDXSIN

Portland

lun. 2/16

9:50 am-4:55 am

2 stops27h 05m

Singapore Changi

dom. 3/1

8:50 am-6:30 pm

1 stop25h 40m

$772

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

mar. 11/18

12:10 am-9:55 pm

1 stop29h 45m

Singapore Changi

vie. 12/5

11:10 pm-1:55 pm

1 stop30h 45m

$782

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

mié. 10/1

7:00 am-6:25 pm

1 stop20h 25m

Singapore Changi

sáb. 10/11

8:40 pm-4:24 pm

1 stop34h 44m

$798

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

mar. 11/11

11:00 am-8:25 pm

1 stop41h 25m

Singapore Changi

vie. 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 SIN?

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 septiembre 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.

  • What airport do you fly into for flights to Singapore from Washington?

    If you book a flight to Singapore from Washington, you will be flying to Changi, which is the city’s only airport. Singapore Changi (SIN) is located 10.5 mi from the center of Singapore.

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

    The Washington to Singapore Changi 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).

  • What are the most popular routes from State of Washington to Singapore?

    While some choose either Portland - Singapore Changi or Spokane - Singapore Changi, Seattle/Tacoma Intl - Singapore Changi is the most popular route from State of Washington to Singapore.

  • What are the cheapest flights from State of Washington to Singapore?

    The cheapest flight price from State of Washington to Singapore is $284. On average you can expect to pay $2,133. The most popular route, (Seattle/Tacoma Intl - Singapore Changi), can usually be booked for $568.

  • 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 septiembre 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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