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$457+ 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 9/18. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SIN
May 6 — May 131
Tue 5/6
Tue 5/13
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 May 1, 2025.

Most accurate provider

AranGrant
3 stars

Most trusted provider

AranGrant
3 stars

Round-trip from

$707
(Air Canada)

One-way from

$457
(Gurufare)

Popular in

December

Cheapest in

March

Average price

$1,096

Good round-trip deal

$931 or less

Good one-way deal

$350 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 ($68 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 May 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 May 1, 2025.

This Air Canada deal was found by Cheapflights users on 5/1. 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 9/410:00 amPDX - SIN
1 stop30h 05mAir Canada
Thu 9/259:10 amSIN - PDX
1 stop20h 36mAir Canada
Deal found 5/1$707
This FlightHub deal was found by Cheapflights users on 5/1. 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 9/236:15 amPDX - SIN
1 stop33h 50mMultiple Airlines
Wed 10/89:45 amSIN - PDX
2 stops24h 01mMultiple Airlines
Deal found 5/1$747
This Air Canada deal was found by Cheapflights users on 5/1. 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 9/127:15 pmSEA - SIN
1 stop20h 50mAir Canada
Tue 9/169:10 amSIN - SEA
1 stop18h 55mAir Canada
Deal found 5/1$774
This Air Canada deal was found by Cheapflights users on 4/30. 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.
Tue 6/35:30 amSEA - SIN
2 stops28h 20mMultiple Airlines
Tue 6/109:10 amSIN - SEA
1 stop18h 48mMultiple Airlines
Deal found 4/30$796
This ScholarTrip deal was found by Cheapflights users on 5/1. 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 ScholarTrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/17:00 amSEA - SIN
1 stop31h 15mSingapore Airlines
Sat 10/119:00 amSIN - SEA
Nonstop14h 45mSingapore Airlines
Deal found 5/1$798
This FlightHub deal was found by Cheapflights users on 4/30. 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.
Wed 10/157:00 amPDX - SIN
1 stop21h 10mSingapore Airlines
Wed 10/299:15 amSIN - PDX
1 stop19h 04mSingapore Airlines
Deal found 4/30$804
This Cheapflightsfares deal was found by Cheapflights users on 4/30. 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.
Sat 11/15:10 pmPDX - SIN
2 stops36h 15mKorean Air
Sun 11/1610:30 pmSIN - PDX
2 stops30h 49mKorean Air
Deal found 4/30$808
This Asiana Airlines deal was found by Cheapflights users on 5/1. 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.
Mon 9/82:15 pmSEA - SIN
1 stop40h 15mAsiana Airlines
Sun 9/1410:50 pmSIN - SEA
1 stop28h 40mAsiana Airlines
Deal found 5/1$820
This oojo deal was found by Cheapflights users on 4/30. 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 10/111:35 pmSEA - SIN
1 stop18h 50mPhilippine Airlines
Sat 10/118:00 pmSIN - SEA
1 stop38h 15mPhilippine Airlines
Deal found 4/30$829
This oojo deal was found by Cheapflights users on 4/30. 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 5/2112:50 pmSEA - SIN
1 stop19h 50mKorean Air
Wed 6/47:30 amSIN - SEA
1 stop18h 20mKorean Air
Deal found 4/30$847
This United Airlines deal was found by Cheapflights users on 4/30. 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.
Tue 9/233:44 pmPDX - SIN
1 stop23h 31mUnited Airlines
Wed 10/88:45 amSIN - PDX
1 stop18h 58mUnited Airlines
Deal found 4/30$882
This Delta deal was found by Cheapflights users on 5/1. 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.
Mon 11/2411:15 amSEA - SIN
1 stop20h 55mDelta
Wed 12/311:00 amSIN - SEA
1 stop18h 05mDelta
Deal found 5/1$889

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 May 1, 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

10:00 am-7:05 am

1 stop30h 05m

Singapore Changi

Thu 9/25

9:10 am-2:46 pm

1 stop20h 36m

$707

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Tue 9/23

6:15 am-7:05 am

1 stop33h 50m

Singapore Changi

Wed 10/8

9:45 am-6:46 pm

2 stops24h 01m

$747

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

Fri 9/12

7:15 pm-7:05 am

1 stop20h 50m

Singapore Changi

Tue 9/16

9:10 am-1:05 pm

1 stop18h 55m

$774

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

Tue 6/3

5:30 am-12:50 am

2 stops28h 20m

Singapore Changi

Tue 6/10

9:10 am-12:58 pm

1 stop18h 48m

$796

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

Wed 10/1

7:00 am-5:15 am

1 stop31h 15m

Singapore Changi

Sat 10/11

9:00 am-8:45 am

Nonstop14h 45m

$798

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-1:19 pm

1 stop19h 04m

$804

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Wed 5/14

6:11 am-5:00 am

2 stops31h 49m

Singapore Changi

Fri 5/16

1:10 am-4:08 pm

2 stops29h 58m

$809

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

Mon 9/8

2:15 pm-9:30 pm

1 stop40h 15m

Singapore Changi

Sat 9/13

10:50 pm-12:30 pm

1 stop28h 40m

$820

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

Wed 10/1

11:35 pm-9:25 am

1 stop18h 50m

Singapore Changi

Sat 10/11

8:00 pm-7:15 pm

1 stop38h 15m

$829

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

Wed 5/21

12:50 pm-11:40 pm

1 stop19h 50m

Singapore Changi

Wed 6/4

7:30 am-10:50 am

1 stop18h 20m

$847

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/30

Showing 1-10 of 51 results
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6

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 May 1, 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 May 1, 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
162 reviews

Comfort

9.0

Food

8.9

Entertainment

9.0

Crew

9.3

Boarding

9.0

Overall

9.1

Reviews

1 / 6
10.0
Excellent

Anonymous,Apr 2025

KIX - TPE

Very pleasant experience overall, while the main course of the meal could have been better and the movies could have been more recent and with more variety. They offer blindfolds and earplugs, which are a plus.
STARLUX Airlines
9.1
Wonderful
162 reviews
STARLUX Airlines
9.1
Wonderful
162 reviews

Comfort

9.0

Food

8.9

Entertainment

9.0

Crew

9.3

Boarding

9.0

Overall

9.1

Reviews

1 / 6
10.0
Excellent

Anonymous,Apr 2025

KIX - TPE

Very pleasant experience overall, while the main course of the meal could have been better and the movies could have been more recent and with more variety. They offer blindfolds and earplugs, which are a plus.
EVA Air
8.4
Very good
1,186 reviews
STARLUX Airlines
9.1
Wonderful
162 reviews

Comfort

9.0

Food

8.9

Entertainment

9.0

Crew

9.3

Boarding

9.0

Overall

9.1

Reviews

1 / 6
10.0
Excellent

Anonymous,Apr 2025

KIX - TPE

Very pleasant experience overall, while the main course of the meal could have been better and the movies could have been more recent and with more variety. They offer blindfolds and earplugs, which are a plus.
Korean Air
8.4
Very good
1,069 reviews
STARLUX Airlines
9.1
Wonderful
162 reviews

Comfort

9.0

Food

8.9

Entertainment

9.0

Crew

9.3

Boarding

9.0

Overall

9.1

Reviews

1 / 6
10.0
Excellent

Anonymous,Apr 2025

KIX - TPE

Very pleasant experience overall, while the main course of the meal could have been better and the movies could have been more recent and with more variety. They offer blindfolds and earplugs, which are a plus.
Japan Airlines
8.3
Very good
1,464 reviews
STARLUX Airlines
9.1
Wonderful
162 reviews

Comfort

9.0

Food

8.9

Entertainment

9.0

Crew

9.3

Boarding

9.0

Overall

9.1

Reviews

1 / 6
10.0
Excellent

Anonymous,Apr 2025

KIX - TPE

Very pleasant experience overall, while the main course of the meal could have been better and the movies could have been more recent and with more variety. They offer blindfolds and earplugs, which are a plus.
China Airlines
8.3
Very good
732 reviews
STARLUX Airlines
9.1
Wonderful
162 reviews

Comfort

9.0

Food

8.9

Entertainment

9.0

Crew

9.3

Boarding

9.0

Overall

9.1

Reviews

1 / 6
10.0
Excellent

Anonymous,Apr 2025

KIX - TPE

Very pleasant experience overall, while the main course of the meal could have been better and the movies could have been more recent and with more variety. They offer blindfolds and earplugs, which are a plus.

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 55 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 Korean Air ($457), Singapore Airlines ($475), and Air Canada ($475).

  • 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

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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 May 1, 2025.
AirlineCheapestAverageFlexibilityOn-time
Singapore AirlinesCheapest$685Average$1,116FlexibilityNo cancel feeOn-time81%
Asiana AirlinesCheapest$689Average$779FlexibilityNo cancel feeOn-time76%
Philippine AirlinesCheapest$694Average$782FlexibilityNo cancel feeOn-time60%
Japan AirlinesCheapest$716Average$1,147FlexibilityNo cancel feeOn-time79%
Korean AirCheapest$722Average$884FlexibilityNo cancel feeOn-time81%
United AirlinesCheapest$725Average$1,243FlexibilityNo cancel feeOn-time69%
Air CanadaCheapest$728Average$901FlexibilityNo cancel feeOn-time67%
DeltaCheapest$750Average$1,234FlexibilityNo cancel feeOn-timeN/A
China AirlinesCheapest$899Average$1,057FlexibilityNo cancel feeOn-time70%
Alaska AirlinesCheapest$972Average$1,075FlexibilityNo cancel feeOn-time75%

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