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$409+ 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 4/28. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SIN
apr 6 — apr 131
dom 4/6
dom 4/13
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 aprile 1, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$706
(Air Canada)

One-way from

$409
(United Airlines)

Popular in

December

Cheapest in

March

Average price

$886

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 Changi
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One-way flight from Washington to Singapore Changi
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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 April 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 aprile 1, 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.
gio 9/43:25 pmPDX - SIN
1 stop24h 40mAir Canada
gio 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.
dom 5/117:40 pmPDX - SIN
2 stops38h 10mMultiple Airlines
gio 5/299:10 amSIN - PDX
1 stop20h 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.
mar 12/27:05 pmSEA - SIN
2 stops37h 20mMultiple Airlines
mar 12/2310:00 amSIN - SEA
1 stop27h 55mMultiple Airlines
Deal found 3/30$756
This Air Canada 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
gio 10/167:15 pmSEA - SIN
2 stops37h 05mAir Canada
dom 10/261:10 pmSIN - SEA
2 stops23h 45mAir Canada
Deal found 3/31$757
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.
mer 5/72:15 pmSEA - SIN
1 stop40h 15mAsiana Airlines
mer 6/1110:50 pmSIN - SEA
1 stop28h 40mAsiana Airlines
Deal found 3/30$770
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.
mer 9/177:00 amPDX - SIN
1 stop21h 10mSingapore Airlines
mar 9/309:15 amSIN - PDX
1 stop19h 35mSingapore Airlines
Deal found 3/30$835
This StudentUniverse 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 StudentUniverse is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar 12/211:00 amSEA - SIN
1 stop26h 00mKorean Air
mar 12/231:30 amSIN - SEA
1 stop23h 30mKorean Air
Deal found 3/30$873
This Justfly.com 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sab 11/228:45 amSEA - SIN
Nonstop17h 00mSingapore Airlines
dom 11/309:00 amSIN - SEA
Nonstop14h 10mSingapore Airlines
Deal found 3/31$875
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar 4/17:33 pmSEA - SIN
1 stop20h 12mUnited Airlines
mar 4/811:05 amSIN - SEA
1 stop18h 20mUnited Airlines
Deal found 3/31$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.
dom 5/47:23 amPDX - SIN
2 stops30h 37mDelta
sab 5/1010:30 pmSIN - PDX
2 stops37h 22mDelta
Deal found 3/31$891
This Justfly.com 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun 5/194:30 pmSEA - SIN
1 stop23h 10mANA
dom 5/2510:10 pmSIN - SEA
1 stop31h 15mANA
Deal found 3/31$901
This United 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 United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ven 4/186:00 amPDX - SIN
1 stop21h 25mUnited Airlines
sab 5/39:00 amSIN - PDX
1 stop21h 05mUnited Airlines
Deal found 3/31$916

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 aprile 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

gio 9/4

3:25 pm-7:05 am

1 stop24h 40m

Singapore Changi

gio 9/25

9:10 am-2:46 pm

1 stop20h 36m

$706

PortlandSingapore

PDX - SIN

PDXSIN

Portland

dom 5/11

7:40 pm-12:50 am

2 stops38h 10m

Singapore Changi

gio 5/29

9:10 am-2:40 pm

1 stop20h 30m

$750

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

gio 5/8

10:00 am-7:05 am

1 stop30h 05m

Singapore Changi

gio 6/12

9:10 am-12:58 pm

1 stop18h 48m

$760

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

dom 5/11

5:35 am-12:50 am

2 stops28h 15m

Singapore Changi

sab 5/17

9:10 am-6:33 pm

1 stop24h 23m

$763

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

mer 5/7

2:15 pm-9:30 pm

1 stop40h 15m

Singapore Changi

mer 6/11

10:50 pm-12:30 pm

1 stop28h 40m

$770

PortlandSingapore

PDX - SIN

PDXSIN

Portland

mer 9/17

7:00 am-7:10 pm

1 stop21h 10m

Singapore Changi

mar 9/30

9:15 am-1:50 pm

1 stop19h 35m

$835

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

mer 9/3

12:50 pm-7:55 pm

1 stop40h 05m

Singapore Changi

lun 9/15

1:10 am-10:40 am

1 stop24h 30m

$873

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

dom 9/7

7:00 am-7:10 pm

1 stop21h 10m

Singapore Changi

dom 9/21

9:00 am-8:45 am

Nonstop14h 45m

$887

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

mar 5/13

9:00 am-6:45 am

1 stop30h 45m

Singapore Changi

mer 6/11

11:05 am-2:25 pm

1 stop18h 20m

$888

PortlandSingapore

PDX - SIN

PDXSIN

Portland

dom 5/4

7:23 am-5:00 am

2 stops30h 37m

Singapore Changi

sab 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 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 aprile 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 aprile 1, 2025.
Get a feel of what it's like to fly with STARLUX Airlines, Korean Air and Japan Airlines from Washington to Singapore by reading reviews from past customers. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
STARLUX Airlines
9.1
Wonderful
146 reviews

Crew

9.3

Food

8.9

Comfort

9.0

Overall

9.1

Entertainment

9.0

Boarding

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

Crew

9.3

Food

8.9

Comfort

9.0

Overall

9.1

Entertainment

9.0

Boarding

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

Crew

9.3

Food

8.9

Comfort

9.0

Overall

9.1

Entertainment

9.0

Boarding

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

Crew

9.3

Food

8.9

Comfort

9.0

Overall

9.1

Entertainment

9.0

Boarding

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

Crew

9.3

Food

8.9

Comfort

9.0

Overall

9.1

Entertainment

9.0

Boarding

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.
China Airlines
8.2
Very good
723 reviews
STARLUX Airlines
9.1
Wonderful
146 reviews

Crew

9.3

Food

8.9

Comfort

9.0

Overall

9.1

Entertainment

9.0

Boarding

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.

  • 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 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 United Airlines ($409), ANA ($414), and Asiana Airlines ($455).

  • 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 $323. On average you can expect to pay $2,395. The most popular route, (Seattle/Tacoma Intl - Singapore Changi), can usually be booked for $722.

  • 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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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 aprile 1, 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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