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$368+ 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 9/4. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SIN
Aug 5 — Aug 121
Tue 8/5
Tue 8/12
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 July 31, 2025.

Round-trip from

$680
(oojo)

One-way from

$369
(SmartFares)

Popular in

December

Cheapest in

February

Average price

$903

Good round-trip deal

$668 or less

Good one-way deal

$321 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 ($133 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($52 potential savings vs. average RT price).
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Average for round-trip flights in July 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 July 31, 2025.

This oojo deal was found by Cheapflights users on 7/30. 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 10/1210:15 amSEA - SIN
Nonstop16h 20mSingapore Airlines
Thu 10/169:00 amSIN - SEA
Nonstop14h 45mSingapore Airlines
Deal found 7/30$680
This Cheapflightsfares deal was found by Cheapflights users on 7/29. 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.
Sun 11/169:30 pmSEA - SIN
1 stop29h 40mPhilippine Airlines
Tue 11/2510:35 amSIN - SEA
1 stop24h 00mPhilippine Airlines
Deal found 7/29$694
This oojo deal was found by Cheapflights users on 7/29. 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 11/912:10 amSEA - SIN
1 stop29h 45mAsiana Airlines
Mon 11/2411:10 pmSIN - SEA
1 stop30h 45mAsiana Airlines
Deal found 7/29$707
This CrystalTravel deal was found by Cheapflights users on 7/30. 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 CrystalTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/1712:50 pmSEA - SIN
1 stop25h 10mKorean Air
Mon 9/291:10 amSIN - SEA
1 stop24h 30mKorean Air
Deal found 7/30$713
This Expedia deal was found by Cheapflights users on 7/29. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/77:15 pmSEA - SIN
1 stop20h 50mAir Canada
Tue 9/239:10 amSIN - SEA
1 stop24h 26mAir Canada
Deal found 7/29$714
This Air Canada deal was found by Cheapflights users on 7/31. 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.
Tue 9/1610:00 amPDX - SIN
1 stop30h 05mAir Canada
Tue 9/309:10 amSIN - PDX
1 stop20h 36mAir Canada
Deal found 7/31$718
This United Airlines deal was found by Cheapflights users on 7/30. 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.
Mon 11/107:00 amSEA - SIN
1 stop21h 15mUnited Airlines
Wed 11/1910:10 amSIN - SEA
1 stop19h 18mUnited Airlines
Deal found 7/30$745
This oojo deal was found by Cheapflights users on 7/30. 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 8/288:08 amSEA - SIN
2 stops42h 22mJapan Airlines
Tue 9/168:05 amSIN - SEA
2 stops42h 33mJapan Airlines
Deal found 7/30$749
This Air Canada deal was found by Cheapflights users on 7/30. 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.
Sat 11/17:38 pmPDX - SIN
2 stops44h 22mMultiple Airlines
Sun 11/169:00 pmSIN - PDX
2 stops28h 15mMultiple Airlines
Deal found 7/30$781
This FlightHub deal was found by Cheapflights users on 7/30. 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.
Tue 9/169:17 amPDX - SIN
2 stops28h 43mKorean Air
Mon 9/291:10 amSIN - PDX
2 stops31h 00mKorean Air
Deal found 7/30$807
This Japan Airlines deal was found by Cheapflights users on 7/31. 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 Japan Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/141:30 pmGEG - SIN
2 stops37h 00mMultiple Airlines
Sun 9/218:05 amSIN - GEG
2 stops26h 12mMultiple Airlines
Deal found 7/31$952
This oojo deal was found by Cheapflights users on 7/30. 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.
Wed 8/206:25 amGEG - SIN
2 stops27h 25mCathay Pacific
Tue 8/261:50 amSIN - GEG
2 stops35h 35mCathay Pacific
Deal found 7/30$967

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 July 31, 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

Sun 10/12

10:15 am-5:35 pm

Nonstop16h 20m

Singapore Changi

Thu 10/16

9:00 am-8:45 am

Nonstop14h 45m

$680

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

Sun 9/7

11:35 pm-1:20 pm

1 stop22h 45m

Singapore Changi

Sun 9/21

2:35 pm-7:15 pm

1 stop19h 40m

$695

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

Sun 9/14

2:15 pm-9:30 pm

1 stop40h 15m

Singapore Changi

Mon 9/29

10:50 pm-12:30 pm

1 stop28h 40m

$707

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

Wed 9/17

12:50 pm-5:00 am

1 stop25h 10m

Singapore Changi

Mon 9/29

1:10 am-10:40 am

1 stop24h 30m

$713

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

Sun 9/7

7:15 pm-7:05 am

1 stop20h 50m

Singapore Changi

Tue 9/23

9:10 am-6:36 pm

1 stop24h 26m

$714

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Tue 9/16

10:00 am-7:05 am

1 stop30h 05m

Singapore Changi

Tue 9/30

9:10 am-2:46 pm

1 stop20h 36m

$718

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

Thu 8/28

8:08 am-5:30 pm

2 stops42h 22m

Singapore Changi

Tue 9/16

8:05 am-11:38 am

2 stops42h 33m

$749

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

Thu 8/28

12:55 pm-11:40 pm

1 stop19h 45m

Singapore Changi

Thu 9/4

7:30 am-1:40 pm

1 stop21h 10m

$755

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

Tue 9/2

2:29 pm-6:15 am

1 stop24h 46m

Singapore Changi

Tue 9/9

8:45 am-1:28 pm

1 stop19h 43m

$756

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Sat 11/1

7:38 pm-7:00 am

2 stops44h 22m

Singapore Changi

Sun 11/16

9:00 pm-9:15 am

2 stops28h 15m

$781

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/31

Showing 1-10 of 29 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 $995). Flying from State of Washington to Singapore in December is currently the most expensive (average of $1,679). 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 July 31, 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.

Reviews of airlines servicing Singapore

Get insights into the airlines that provide service to Singapore. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Singapore. Reviews last updated July 31, 2025.
Get a feel of what it's like to fly with Korean Air, Japan Airlines, and China Airlines from Washington to Singapore by reading reviews from past customers. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Korean Air
8.4
Very good
1,121 reviews

Crew

8.7

Entertainment

8.2

Boarding

8.5

Comfort

8.2

Food

8.1

Overall

8.4

Reviews

1 / 20
10.0
Excellent

Myung Suk,May 2025

ICN - LAX

The flight was less crowded and the economic class seat was at least 5 inches longer than other airlines.
Korean Air
8.4
Very good
1,121 reviews
Korean Air
8.4
Very good
1,121 reviews

Crew

8.7

Entertainment

8.2

Boarding

8.5

Comfort

8.2

Food

8.1

Overall

8.4

Reviews

1 / 20
10.0
Excellent

Myung Suk,May 2025

ICN - LAX

The flight was less crowded and the economic class seat was at least 5 inches longer than other airlines.
Japan Airlines
8.3
Very good
1,536 reviews
Korean Air
8.4
Very good
1,121 reviews

Crew

8.7

Entertainment

8.2

Boarding

8.5

Comfort

8.2

Food

8.1

Overall

8.4

Reviews

1 / 20
10.0
Excellent

Myung Suk,May 2025

ICN - LAX

The flight was less crowded and the economic class seat was at least 5 inches longer than other airlines.
China Airlines
8.3
Very good
754 reviews
Korean Air
8.4
Very good
1,121 reviews

Crew

8.7

Entertainment

8.2

Boarding

8.5

Comfort

8.2

Food

8.1

Overall

8.4

Reviews

1 / 20
10.0
Excellent

Myung Suk,May 2025

ICN - LAX

The flight was less crowded and the economic class seat was at least 5 inches longer than other airlines.
Asiana Airlines
8.2
Very good
468 reviews
Korean Air
8.4
Very good
1,121 reviews

Crew

8.7

Entertainment

8.2

Boarding

8.5

Comfort

8.2

Food

8.1

Overall

8.4

Reviews

1 / 20
10.0
Excellent

Myung Suk,May 2025

ICN - LAX

The flight was less crowded and the economic class seat was at least 5 inches longer than other airlines.
Singapore Airlines
8.1
Very good
1,338 reviews
Korean Air
8.4
Very good
1,121 reviews

Crew

8.7

Entertainment

8.2

Boarding

8.5

Comfort

8.2

Food

8.1

Overall

8.4

Reviews

1 / 20
10.0
Excellent

Myung Suk,May 2025

ICN - LAX

The flight was less crowded and the economic class seat was at least 5 inches longer than other airlines.

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 83 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

  • 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 ($369), Korean Air ($374), and Air Canada ($387).

  • 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 $281. On average you can expect to pay $2,327. The most popular route, (Seattle/Tacoma Intl - Singapore Changi), can usually be booked for $542.

  • 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 $995). Flying from State of Washington to Singapore in December is currently the most expensive (average of $1,679). 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

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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 July 31, 2025.
AirlineCheapestAverageFlexibilityOn-time
Singapore AirlinesCheapest$614Average$1,052FlexibilityNo cancel feeOn-time81%
Japan AirlinesCheapest$687Average$830FlexibilityNo cancel feeOn-time79%
Asiana AirlinesCheapest$692Average$788FlexibilityNo cancel feeOn-time76%
Philippine AirlinesCheapest$694Average$750FlexibilityNo cancel feeOn-time60%
Air CanadaCheapest$712Average$883FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$724Average$888FlexibilityNo cancel feeOn-time69%
Korean AirCheapest$728Average$947FlexibilityNo cancel feeOn-time81%
DeltaCheapest$750Average$938FlexibilityNo cancel feeOn-timeN/A
ANACheapest$849Average$1,181FlexibilityNo cancel feeOn-time80%
China AirlinesCheapest$933Average$1,113FlexibilityNo cancel feeOn-time70%

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