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$373+ 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 8/16. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SIN
Apr 5 — Apr 121
Sat 4/5
Sat 4/12
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 March 31, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$706
(Air Canada)

One-way from

$373
(Ovago)

Popular in

December

Cheapest in

March

Average price

$862

Good round-trip deal

$988 or less

Good one-way deal

$349 or less
Provider with most accurate pricing for Seattle/Tacoma Intl-Singapore Changi flight deals.
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Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Singapore Changi flights.
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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. 6% potential increase in price ($73 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($50 potential savings vs. average RT price).
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Average for round-trip flights in March 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 March 31, 2025.

This Air Canada deal was found by Cheapflights users on 3/30. 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.
Thu 9/43:25 pmPDX - SIN
1 stop24h 40mAir Canada
Thu 9/259:10 amSIN - PDX
1 stop20h 36mAir Canada
Deal found 3/30$706
This Air Canada deal was found by Cheapflights users on 3/30. 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.
Mon 9/157:15 pmSEA - SIN
2 stops42h 45mAir Canada
Fri 9/199:50 amSIN - SEA
2 stops38h 31mAir Canada
Deal found 3/30$748
This Air Canada deal was found by Cheapflights users on 3/30. 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.
Thu 10/231:45 pmSEA - SIN
1 stop26h 20mMultiple Airlines
Thu 10/302:20 amSIN - SEA
2 stops22h 30mMultiple Airlines
Deal found 3/30$750
This Air Canada deal was found by Cheapflights users on 3/30. 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.
Sun 5/117:40 pmPDX - SIN
2 stops38h 10mMultiple Airlines
Thu 5/299:10 amSIN - PDX
1 stop20h 30mMultiple Airlines
Deal found 3/30$750
This Delta deal was found by Cheapflights users on 3/30. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/812:40 pmSEA - SIN
1 stop25h 20mDelta
Mon 4/1410:30 pmSIN - SEA
1 stop30h 00mDelta
Deal found 3/30$752
This Gurufare deal was found by Cheapflights users on 3/29. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/47:00 amSEA - SIN
1 stop21h 10mSingapore Airlines
Sat 10/259:00 amSIN - SEA
Nonstop14h 45mSingapore Airlines
Deal found 3/29$764
This Asiana Airlines deal was found by Cheapflights users on 3/30. 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 Asiana Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/72:15 pmSEA - SIN
1 stop40h 15mAsiana Airlines
Sun 6/810:50 pmSIN - SEA
1 stop28h 40mAsiana Airlines
Deal found 3/30$770
This Cheapflightsfares deal was found by Cheapflights users on 3/30. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/2411:35 pmSEA - SIN
1 stop22h 45mPhilippine Airlines
Wed 10/12:35 pmSIN - SEA
1 stop19h 40mPhilippine Airlines
Deal found 3/30$819
This CrystalTravel deal was found by Cheapflights users on 3/30. 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.
Tue 12/911:00 amSEA - SIN
1 stop26h 00mKorean Air
Tue 12/161:30 amSIN - SEA
1 stop23h 30mKorean Air
Deal found 3/30$824
This Justfly.com deal was found by Cheapflights users on 3/30. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/177:00 amPDX - SIN
1 stop21h 10mSingapore Airlines
Tue 9/309:15 amSIN - PDX
1 stop19h 35mSingapore Airlines
Deal found 3/30$835
This United Airlines deal was found by Cheapflights users on 3/30. 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.
Wed 5/142:40 pmSEA - SIN
1 stop25h 05mUnited Airlines
Wed 5/2111:05 amSIN - SEA
1 stop18h 20mUnited Airlines
Deal found 3/30$888
This Delta deal was found by Cheapflights users on 3/31. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/47:23 amPDX - SIN
2 stops30h 37mDelta
Sat 5/1010:30 pmSIN - PDX
2 stops37h 22mDelta
Deal found 3/31$891

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 March 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

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Thu 9/4

3:25 pm-7:05 am

1 stop24h 40m

Singapore Changi

Thu 9/25

9:10 am-2:46 pm

1 stop20h 36m

$706

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

Mon 9/15

7:15 pm-5:00 am

2 stops42h 45m

Singapore Changi

Fri 9/19

9:50 am-9:21 am

2 stops38h 31m

$748

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Sun 5/11

7:40 pm-12:50 am

2 stops38h 10m

Singapore Changi

Thu 5/29

9:10 am-2:40 pm

1 stop20h 30m

$750

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

Sun 5/11

5:35 am-12:50 am

2 stops28h 15m

Singapore Changi

Sun 5/18

9:10 am-10:13 pm

1 stop28h 03m

$763

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

Wed 5/7

2:15 pm-9:30 pm

1 stop40h 15m

Singapore Changi

Sun 6/8

10:50 pm-12:30 pm

1 stop28h 40m

$770

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

Wed 9/24

11:35 pm-1:20 pm

1 stop22h 45m

Singapore Changi

Wed 10/1

2:35 pm-7:15 pm

1 stop19h 40m

$819

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Wed 9/17

7:00 am-7:10 pm

1 stop21h 10m

Singapore Changi

Tue 9/30

9:15 am-1:50 pm

1 stop19h 35m

$835

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

Sun 9/7

7:00 am-7:10 pm

1 stop21h 10m

Singapore Changi

Sun 9/21

9:00 am-8:45 am

Nonstop14h 45m

$887

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

Wed 5/14

2:40 pm-6:45 am

1 stop25h 05m

Singapore Changi

Wed 5/21

11:05 am-2:25 pm

1 stop18h 20m

$888

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Sun 5/4

7:23 am-5:00 am

2 stops30h 37m

Singapore Changi

Sat 5/10

10:30 pm-8:52 pm

2 stops37h 22m

$891

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/30

Showing 1-10 of 49 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 $1,011). Flying from State of Washington to Singapore in December is currently the most expensive (average of $1,684). 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 March 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.

Rainfall in Singapore by month

Plan your trip to Singapore by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Singapore ranges from 5.9 - 10.6 inches per month. December is typically the wettest month, when rainfall can reach 10.6 in. July is typically the driest time to visit Singapore when rainfall is around 5.9 in.

Temperature in Singapore by month

Plan your trip to Singapore by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Singapore, use this chart to help with planning. For those seeking warmer temperatures, March is the ideal time of year to visit, when temperatures reach an average of 82.4 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 78.8 F).

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 March 31, 2025.
Get a feel of what it's like to fly with STARLUX Airlines, EVA Air and Korean Air from Washington to Singapore by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
STARLUX Airlines
9.1
Wonderful
146 reviews

Boarding

9.0

Crew

9.3

Comfort

9.0

Food

8.9

Overall

9.1

Entertainment

9.0

Reviews

1 / 5
10.0
Excellent

Andrew,Jan 2025

LAX - TPE

Crew were attentive from start to finish. Each meal was amazing. IFE screen was huge and had quite a bit of western movies, however the tv shows were lacking.
STARLUX Airlines
9.1
Wonderful
146 reviews
STARLUX Airlines
9.1
Wonderful
146 reviews

Boarding

9.0

Crew

9.3

Comfort

9.0

Food

8.9

Overall

9.1

Entertainment

9.0

Reviews

1 / 5
10.0
Excellent

Andrew,Jan 2025

LAX - TPE

Crew were attentive from start to finish. Each meal was amazing. IFE screen was huge and had quite a bit of western movies, however the tv shows were lacking.
EVA Air
8.4
Very good
1,170 reviews
STARLUX Airlines
9.1
Wonderful
146 reviews

Boarding

9.0

Crew

9.3

Comfort

9.0

Food

8.9

Overall

9.1

Entertainment

9.0

Reviews

1 / 5
10.0
Excellent

Andrew,Jan 2025

LAX - TPE

Crew were attentive from start to finish. Each meal was amazing. IFE screen was huge and had quite a bit of western movies, however the tv shows were lacking.
Korean Air
8.4
Very good
1,051 reviews
STARLUX Airlines
9.1
Wonderful
146 reviews

Boarding

9.0

Crew

9.3

Comfort

9.0

Food

8.9

Overall

9.1

Entertainment

9.0

Reviews

1 / 5
10.0
Excellent

Andrew,Jan 2025

LAX - TPE

Crew were attentive from start to finish. Each meal was amazing. IFE screen was huge and had quite a bit of western movies, however the tv shows were lacking.
Japan Airlines
8.3
Very good
1,440 reviews
STARLUX Airlines
9.1
Wonderful
146 reviews

Boarding

9.0

Crew

9.3

Comfort

9.0

Food

8.9

Overall

9.1

Entertainment

9.0

Reviews

1 / 5
10.0
Excellent

Andrew,Jan 2025

LAX - TPE

Crew were attentive from start to finish. Each meal was amazing. IFE screen was huge and had quite a bit of western movies, however the tv shows were lacking.
ANA
8.3
Very good
831 reviews
STARLUX Airlines
9.1
Wonderful
146 reviews

Boarding

9.0

Crew

9.3

Comfort

9.0

Food

8.9

Overall

9.1

Entertainment

9.0

Reviews

1 / 5
10.0
Excellent

Andrew,Jan 2025

LAX - TPE

Crew were attentive from start to finish. Each meal was amazing. IFE screen was huge and had quite a bit of western movies, however the tv shows were lacking.

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 46 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 Singapore Airlines ($373), United Airlines ($409), and ANA ($414).

  • 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 $1,011). Flying from State of Washington to Singapore in December is currently the most expensive (average of $1,684). 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

Browse thousands of different options on Cheapflights for your next trip

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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 March 31, 2025.
AirlineCheapestAverageFlexibilityOn-time
Singapore AirlinesCheapest$686Average$1,140FlexibilityNo cancel feeOn-time81%
Asiana AirlinesCheapest$689Average$778FlexibilityNo cancel feeOn-time76%
Philippine AirlinesCheapest$694Average$778FlexibilityNo cancel feeOn-time60%
Japan AirlinesCheapest$724Average$1,102FlexibilityNo cancel feeOn-time79%
United AirlinesCheapest$725Average$925FlexibilityNo cancel feeOn-time69%
Korean AirCheapest$727Average$891FlexibilityNo cancel feeOn-time81%
DeltaCheapest$750Average$1,239FlexibilityNo cancel feeOn-timeN/A
Air CanadaCheapest$780Average$947FlexibilityNo cancel feeOn-time67%
China AirlinesCheapest$899Average$1,020FlexibilityNo cancel feeOn-time70%
Alaska AirlinesCheapest$972Average$1,075FlexibilityNo cancel feeOn-time75%
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