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$265+ 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 3/22. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SIN
Jan 17 — Jan 241
Sat 1/17
Sat 1/24
1 adult, Economy
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Cheap 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 December 18, 2025.

This Gurufare deal was found by Cheapflights users on 12/15. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/2711:30 pmSEA - SIN
1 stop20h 35mEVA Air
Wed 1/213:45 pmSIN - SEA
1 stop18h 25mEVA Air
Deal found 12/15$1,090
This Kiwi.com deal was found by Cheapflights users on 12/15. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/2711:30 pmSEA - SIN
1 stop20h 35mMultiple Airlines
Wed 1/214:30 pmSIN - SEA
2 stops31h 35mMultiple Airlines
Deal found 12/15$1,100
This KAYAK deal was found by Cheapflights users on 12/15. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/2711:30 pmSEA - SIN
1 stop20h 35mEVA Air
Tue 1/203:45 pmSIN - SEA
1 stop18h 25mEVA Air
Deal found 12/15$1,108
This Gurufare deal was found by Cheapflights users on 12/15. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/2711:30 pmSEA - SIN
1 stop20h 35mEVA Air
Fri 1/233:45 pmSIN - SEA
1 stop18h 25mEVA Air
Deal found 12/15$1,128
This KAYAK deal was found by Cheapflights users on 12/15. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/2711:30 pmSEA - SIN
1 stop20h 35mEVA Air
Sun 1/253:45 pmSIN - SEA
1 stop18h 25mEVA Air
Deal found 12/15$1,148
This oojo deal was found by Cheapflights users on 12/16. 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.
Thu 12/2511:45 pmSEA - SIN
1 stop21h 40mSTARLUX Airlines
Tue 1/202:45 pmSIN - SEA
1 stop16h 20mSTARLUX Airlines
Deal found 12/16$1,183
This United Airlines deal was found by Cheapflights users on 12/16. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/239:06 amSEA - SIN
2 stops43h 09mUnited Airlines
Fri 1/1610:20 pmSIN - SEA
2 stops36h 06mUnited Airlines
Deal found 12/16$1,184
This FlightHub deal was found by Cheapflights users on 12/15. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/2511:45 pmSEA - SIN
1 stop21h 40mSTARLUX Airlines
Fri 1/232:45 pmSIN - SEA
1 stop16h 20mSTARLUX Airlines
Deal found 12/15$1,185
This Kiwi.com deal was found by Cheapflights users on 12/15. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/2711:30 pmSEA - SIN
1 stop20h 35mMultiple Airlines
Sat 1/241:35 pmSIN - SEA
2 stops41h 30mMultiple Airlines
Deal found 12/15$1,186
This Kiwi.com deal was found by Cheapflights users on 12/15. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/2711:30 pmSEA - SIN
1 stop20h 35mMultiple Airlines
Thu 1/221:55 amSIN - SEA
2 stops29h 10mMultiple Airlines
Deal found 12/15$1,188
This oojo deal was found by Cheapflights users on 12/16. 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.
Thu 12/2511:45 pmSEA - SIN
1 stop21h 40mSTARLUX Airlines
Fri 1/162:45 pmSIN - SEA
1 stop16h 20mSTARLUX Airlines
Deal found 12/16$1,202
This KAYAK deal was found by Cheapflights users on 12/15. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/2511:45 pmSEA - SIN
1 stop21h 40mSTARLUX Airlines
Sun 1/252:45 pmSIN - SEA
1 stop16h 20mSTARLUX Airlines
Deal found 12/15$1,242

Find flight deals from Washington to Singapore

Keep the following information in mind while searching for Washington to Singapore flight deals. Data was last updated December 18, 2025.

Most accurate provider

Justfly.com
3 stars

Most trusted provider

Justfly.com
3 stars

Round-trip from

$800
(Delta)

One-way from

$265
(FlightHub)

Popular in

December

Cheapest in

September

Average price

$1,530

Good round-trip deal

$741 or less

Good one-way deal

$322 or less
Provider with most accurate pricing for Seattle/Tacoma Intl-Singapore Changi flight deals.
Search Deals
Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Singapore Changi flights.
Search Deals
From Washington to Singapore
Search Deals
One-way flight from Washington to Singapore
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($128 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease ($57 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals
Price to beat on a round-trip flight from Washington to Singapore.
Search Deals
Price to beat on a one-way flight from Washington to Singapore.
Search Deals

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 December 18, 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

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

Tue 2/10

11:25 am-5:00 am

1 stop25h 35m

Singapore Changi

Sun 2/22

10:30 pm-1:20 pm

1 stop30h 50m

$800

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

Mon 2/9

11:25 am-8:25 pm

1 stop41h 00m

Singapore Changi

Sun 2/22

10:30 pm-1:20 pm

1 stop30h 50m

$800

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

Tue 1/13

12:24 pm-8:00 am

2 stops27h 36m

Singapore Changi

Tue 1/20

10:10 am-7:55 pm

2 stops25h 45m

$805

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Thu 3/19

7:05 pm-7:00 am

1 stop20h 55m

Singapore Changi

Mon 4/20

11:55 pm-2:40 pm

2 stops29h 45m

$808

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

Sun 3/15

12:36 pm-8:15 pm

1 stop40h 39m

Singapore Changi

Tue 3/24

10:10 am-9:14 pm

2 stops26h 04m

$812

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

Mon 3/9

12:00 pm-12:10 am

1 stop21h 10m

Singapore Changi

Sun 3/15

10:30 pm-8:02 pm

2 stops36h 32m

$814

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

Sun 3/8

7:10 am-6:55 am

2 stops56h 45m

Singapore Changi

Thu 3/19

10:10 am-4:14 pm

1 stop21h 04m

$817

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

Sun 3/8

7:10 am-6:55 am

2 stops56h 45m

Singapore Changi

Mon 3/23

10:10 am-4:14 pm

1 stop21h 04m

$817

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

Thu 3/5

7:10 am-5:00 am

2 stops29h 50m

Singapore Changi

Sun 3/15

1:35 am-2:41 pm

2 stops28h 06m

$820

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

Tue 2/10

7:15 am-5:00 am

2 stops29h 45m

Singapore Changi

Sun 2/22

10:40 am-4:58 pm

2 stops46h 18m

$820

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/17

Showing 1-10 of 50 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, September is the cheapest month in which you can book a flight from State of Washington to Singapore (average of $547). Flying from State of Washington to Singapore in June is currently the most expensive (average of $788). 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 December 18, 2025.

It’s typically best to fly out from State of Washington to Singapore in the evening. Doing so could potentially save you 27% on the flight price compared to flying in the morning, which is usually more expensive.

What is the cheapest day to fly from State of Washington to Singapore?

Use this chart to determine the cheapest time to fly round-trip from Washington to Singapore. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their State of Washington to Singapore flight should consider departing on Friday evenings when fares are most often at their lowest. Saturday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

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 106 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 20h 55m. Fly via Delta, United Airlines, or Air Canada to get the fastest option. State of Washington and Singapore are separated by a distance of 8123 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 Singapore Airlines ($275), Japan Airlines ($332), and Asiana Airlines ($345).

  • 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, September is the cheapest month in which you can book a flight from State of Washington to Singapore (average of $547). Flying from State of Washington to Singapore in June is currently the most expensive (average of $788). 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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Alternative routes for Washington to Singapore

See prices for flight routes from nearby airports that may be better suited for you.
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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 December 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
Singapore AirlinesCheapest$594Average$842FlexibilityNo cancel feeOn-time81%
Philippine AirlinesCheapest$648Average$695FlexibilityNo cancel feeOn-time60%
Asiana AirlinesCheapest$662Average$794FlexibilityNo cancel feeOn-time76%
Japan AirlinesCheapest$687Average$801FlexibilityNo cancel feeOn-time79%
Air CanadaCheapest$712Average$860FlexibilityNo cancel feeOn-time67%
ANACheapest$718Average$1,127FlexibilityNo cancel feeOn-time80%
United AirlinesCheapest$724Average$1,291FlexibilityNo cancel feeOn-time69%
Korean AirCheapest$736Average$964FlexibilityNo cancel feeOn-time81%
DeltaCheapest$750Average$948FlexibilityNo cancel feeOn-timeN/A
China AirlinesCheapest$933Average$1,273FlexibilityNo cancel feeOn-time70%

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