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$270+ 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 9/26. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SIN
Jun 21 — Jun 281
Sat 6/21
Sat 6/28
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 June 16, 2025.

Round-trip from

$694
(Air Canada)

One-way from

$270
(Gurufare)

Popular in

December

Cheapest in

February

Average price

$1,212

Good round-trip deal

$748 or less

Good one-way deal

$348 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. 9% potential increase in price ($104 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($49 potential savings vs. average RT price).
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Average for round-trip flights in June 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 June 16, 2025.

This Air Canada deal was found by Cheapflights users on 6/14. 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 9/43:25 pmPDX - SIN
1 stop24h 40mAir Canada
Thu 9/259:10 amSIN - PDX
1 stop20h 36mAir Canada
Deal found 6/14$694
This FlightHub deal was found by Cheapflights users on 6/16. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/157:00 amPDX - SIN
1 stop21h 10mSingapore Airlines
Wed 10/299:15 amSIN - PDX
1 stop19h 08mSingapore Airlines
Deal found 6/16$802
This Air Canada deal was found by Cheapflights users on 6/15. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/12:55 pmSEA - SIN
2 stops41h 25mMultiple Airlines
Sun 10/59:45 amSIN - SEA
2 stops27h 31mMultiple Airlines
Deal found 6/15$807
This Gurufare deal was found by Cheapflights users on 6/14. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/2710:15 amSEA - SIN
Nonstop16h 20mSingapore Airlines
Sun 10/59:00 amSIN - SEA
Nonstop14h 45mSingapore Airlines
Deal found 6/14$809
This Gotogate deal was found by Cheapflights users on 6/15. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/142:30 pmSEA - SIN
1 stop40h 00mAsiana Airlines
Mon 7/2110:50 pmSIN - SEA
1 stop28h 55mAsiana Airlines
Deal found 6/15$814
This Fareboom deal was found by Cheapflights users on 6/15. 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 Fareboom is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/210:10 amPDX - SIN
2 stops33h 05mMultiple Airlines
Tue 12/239:20 amSIN - PDX
2 stops28h 49mMultiple Airlines
Deal found 6/15$814
This Air Canada deal was found by Cheapflights users on 6/14. 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.
Fri 7/42:55 pmSEA - SIN
1 stop25h 10mAir Canada
Sun 7/139:10 amSIN - SEA
1 stop24h 26mAir Canada
Deal found 6/14$819
This CrystalTravel deal was found by Cheapflights users on 6/16. 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 CrystalTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/107:28 amSEA - SIN
2 stops25h 12mKorean Air
Wed 9/177:30 amSIN - SEA
1 stop18h 10mKorean Air
Deal found 6/16$826
This Cheapflightsfares deal was found by Cheapflights users on 6/14. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/1211:35 pmSEA - SIN
1 stop18h 50mPhilippine Airlines
Fri 9/1910:25 amSIN - SEA
1 stop23h 50mPhilippine Airlines
Deal found 6/14$864
This United Airlines deal was found by Cheapflights users on 6/14. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/42:50 pmSEA - SIN
1 stop24h 25mUnited Airlines
Tue 8/198:45 amSIN - SEA
1 stop19h 43mUnited Airlines
Deal found 6/14$891
This FlightHub deal was found by Cheapflights users on 6/14. 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.
Thu 9/41:30 pmSEA - SIN
1 stop19h 50mJapan Airlines
Wed 11/192:20 amSIN - SEA
1 stop23h 30mJapan Airlines
Deal found 6/14$903
This oojo deal was found by Cheapflights users on 6/14. 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.
Mon 10/131:10 amSEA - SIN
1 stop20h 25mChina Airlines
Thu 10/302:15 pmSIN - SEA
1 stop20h 00mChina Airlines
Deal found 6/14$928

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 June 16, 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

$694

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Wed 10/15

7:00 am-7:10 pm

1 stop21h 10m

Singapore Changi

Wed 10/29

9:15 am-1:23 pm

1 stop19h 08m

$802

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

Wed 10/1

2:55 pm-11:20 pm

2 stops41h 25m

Singapore Changi

Sun 10/5

9:45 am-10:16 pm

2 stops27h 31m

$807

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

Sat 9/27

10:15 am-5:35 pm

Nonstop16h 20m

Singapore Changi

Sun 10/5

9:00 am-8:45 am

Nonstop14h 45m

$809

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

Mon 7/14

2:30 pm-9:30 pm

1 stop40h 00m

Singapore Changi

Mon 7/21

10:50 pm-12:45 pm

1 stop28h 55m

$814

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Tue 12/2

10:10 am-11:15 am

2 stops33h 05m

Singapore Changi

Tue 12/23

9:20 am-10:09 pm

2 stops28h 49m

$814

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

Fri 7/4

2:55 pm-7:05 am

1 stop25h 10m

Singapore Changi

Sun 7/13

9:10 am-6:36 pm

1 stop24h 26m

$819

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

Wed 9/10

7:28 am-11:40 pm

2 stops25h 12m

Singapore Changi

Wed 9/17

7:30 am-10:40 am

1 stop18h 10m

$826

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

Fri 9/12

11:35 pm-9:25 am

1 stop18h 50m

Singapore Changi

Fri 9/19

10:25 am-7:15 pm

1 stop23h 50m

$864

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

Mon 8/4

12:55 pm-5:00 am

1 stop25h 05m

Singapore Changi

Sun 8/17

1:10 am-2:01 pm

1 stop27h 51m

$891

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/14

Showing 1-10 of 45 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 June 16, 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 June 16, 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
178 reviews

Overall

9.1

Crew

9.3

Food

8.8

Boarding

9.0

Comfort

9.0

Entertainment

8.9

Reviews

1 / 7
10.0
Excellent

ltulagan,Jun 2025

TPE - SEA

The whole trip was very pleasant from the crew, the food, the amenities during the flight.
STARLUX Airlines
9.1
Wonderful
178 reviews
STARLUX Airlines
9.1
Wonderful
178 reviews

Overall

9.1

Crew

9.3

Food

8.8

Boarding

9.0

Comfort

9.0

Entertainment

8.9

Reviews

1 / 7
10.0
Excellent

ltulagan,Jun 2025

TPE - SEA

The whole trip was very pleasant from the crew, the food, the amenities during the flight.
EVA Air
8.4
Very good
1,204 reviews
STARLUX Airlines
9.1
Wonderful
178 reviews

Overall

9.1

Crew

9.3

Food

8.8

Boarding

9.0

Comfort

9.0

Entertainment

8.9

Reviews

1 / 7
10.0
Excellent

ltulagan,Jun 2025

TPE - SEA

The whole trip was very pleasant from the crew, the food, the amenities during the flight.
Korean Air
8.4
Very good
1,090 reviews
STARLUX Airlines
9.1
Wonderful
178 reviews

Overall

9.1

Crew

9.3

Food

8.8

Boarding

9.0

Comfort

9.0

Entertainment

8.9

Reviews

1 / 7
10.0
Excellent

ltulagan,Jun 2025

TPE - SEA

The whole trip was very pleasant from the crew, the food, the amenities during the flight.
Japan Airlines
8.3
Very good
1,494 reviews
STARLUX Airlines
9.1
Wonderful
178 reviews

Overall

9.1

Crew

9.3

Food

8.8

Boarding

9.0

Comfort

9.0

Entertainment

8.9

Reviews

1 / 7
10.0
Excellent

ltulagan,Jun 2025

TPE - SEA

The whole trip was very pleasant from the crew, the food, the amenities during the flight.
China Airlines
8.3
Very good
742 reviews
STARLUX Airlines
9.1
Wonderful
178 reviews

Overall

9.1

Crew

9.3

Food

8.8

Boarding

9.0

Comfort

9.0

Entertainment

8.9

Reviews

1 / 7
10.0
Excellent

ltulagan,Jun 2025

TPE - SEA

The whole trip was very pleasant from the crew, the food, the amenities during the flight.

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 73 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 ($270), Asiana Airlines ($428), and Korean Air ($445).

  • 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 June 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
Singapore AirlinesCheapest$683Average$1,096FlexibilityNo cancel feeOn-time81%
Asiana AirlinesCheapest$692Average$788FlexibilityNo cancel feeOn-time76%
Philippine AirlinesCheapest$694Average$757FlexibilityNo cancel feeOn-time60%
Japan AirlinesCheapest$703Average$875FlexibilityNo cancel feeOn-time79%
United AirlinesCheapest$725Average$888FlexibilityNo cancel feeOn-time69%
Air CanadaCheapest$727Average$890FlexibilityNo cancel feeOn-time67%
Korean AirCheapest$728Average$955FlexibilityNo cancel feeOn-time81%
DeltaCheapest$750Average$1,239FlexibilityNo cancel feeOn-timeN/A
China AirlinesCheapest$933Average$1,096FlexibilityNo cancel feeOn-time70%
STARLUX AirlinesCheapest$966Average$1,173FlexibilityNo cancel feeOn-timeN/A

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