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$328+ 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 3/11. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SIN
Feb 25 — Mar 41
Tue 2/25
Tue 3/4
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 February 20, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$713
(oojo)

One-way from

$328
(FlightHub)

Popular in

December

Cheapest in

January

Average price

$914

Good round-trip deal

$881 or less

Good one-way deal

$334 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. 4% potential increase in price ($48 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($49 potential savings vs. average RT price).
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Average for round-trip flights in February 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 February 20, 2025.

This Air Canada deal was found by Cheapflights users on 2/20. 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 9/91:45 pmSEA - SIN
1 stop26h 20mAir Canada
Tue 9/239:10 amSIN - SEA
1 stop24h 26mAir Canada
Deal found 2/20$706
This Air Canada deal was found by Cheapflights users on 2/19. 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 stop28h 46mAir Canada
Deal found 2/19$706
This oojo deal was found by Cheapflights users on 2/20. 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 3/1911:35 pmSEA - SIN
1 stop19h 00mPhilippine Airlines
Wed 3/262:10 pmSIN - SEA
1 stop20h 00mPhilippine Airlines
Deal found 2/20$713
This oojo deal was found by Cheapflights users on 2/19. 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 3/611:00 amSEA - SIN
1 stop21h 10mKorean Air
Sun 3/2310:30 pmSIN - SEA
1 stop26h 30mKorean Air
Deal found 2/19$720
This oojo deal was found by Cheapflights users on 2/20. 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 3/101:45 pmSEA - SIN
1 stop19h 50mAsiana Airlines
Sun 3/161:55 amSIN - SEA
1 stop25h 00mAsiana Airlines
Deal found 2/20$722
This Gurufare deal was found by Cheapflights users on 2/20. 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.
Tue 9/910:15 amSEA - SIN
Nonstop16h 20mSingapore Airlines
Tue 9/239:00 amSIN - SEA
Nonstop14h 45mSingapore Airlines
Deal found 2/20$725
This Cheapflightsfares deal was found by Cheapflights users on 2/20. 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.
Tue 9/98:05 amSEA - SIN
2 stops25h 15mJapan Airlines
Tue 9/239:50 pmSIN - SEA
2 stops34h 05mJapan Airlines
Deal found 2/20$736
This United Airlines deal was found by Cheapflights users on 2/20. 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 3/198:50 amSEA - SIN
2 stops31h 10mUnited Airlines
Wed 3/2610:20 pmSIN - SEA
1 stop25h 07mUnited Airlines
Deal found 2/20$757
This Japan Airlines deal was found by Cheapflights users on 2/19. 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.
Fri 9/121:40 pmGEG - SIN
2 stops43h 40mMultiple Airlines
Tue 9/309:50 pmSIN - GEG
2 stops28h 50mMultiple Airlines
Deal found 2/19$781
This Delta deal was found by Cheapflights users on 2/19. 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 3/2311:35 amSEA - SIN
1 stop21h 35mDelta
Wed 3/2611:00 amSIN - SEA
1 stop18h 40mDelta
Deal found 2/19$787
This Delta deal was found by Cheapflights users on 2/19. 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 8/39:10 amPDX - SIN
2 stops23h 30mDelta
Fri 1/1611:00 amSIN - PDX
2 stops23h 41mDelta
Deal found 2/19$801
This FlightHub deal was found by Cheapflights users on 2/20. 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 4/1710:10 amPDX - SIN
1 stop29h 55mMultiple Airlines
Wed 4/3011:40 pmSIN - PDX
2 stops38h 15mMultiple Airlines
Deal found 2/20$809

Find flights from Washington to Singapore within your budget

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 February 20, 2025.

Fly from

Washington

Fly to

Singapore

Route

Depart

Return

Price

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

Wed 3/19

11:35 pm-9:35 am

1 stop19h 00m

Singapore Changi

Wed 3/26

2:10 pm-7:10 pm

1 stop20h 00m

$713

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

Thu 3/6

11:00 am-12:10 am

1 stop21h 10m

Singapore Changi

Sun 3/23

10:30 pm-10:00 am

1 stop26h 30m

$720

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

Mon 3/10

1:45 pm-12:35 am

1 stop19h 50m

Singapore Changi

Sun 3/16

1:55 am-11:55 am

1 stop25h 00m

$722

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

Tue 4/15

10:15 am-5:35 pm

Nonstop16h 20m

Singapore Changi

Tue 4/22

9:15 am-4:40 pm

1 stop22h 25m

$753

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

Wed 3/19

3:01 pm-7:00 am

2 stops24h 59m

Singapore Changi

Wed 3/26

10:10 am-9:01 pm

2 stops25h 51m

$757

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Wed 4/16

3:25 pm-11:15 am

2 stops28h 50m

Singapore Changi

Thu 5/1

8:50 pm-2:40 pm

2 stops32h 50m

$757

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

Wed 6/4

2:55 pm-11:20 pm

2 stops41h 25m

Singapore Changi

Sat 6/14

9:10 am-2:13 pm

1 stop20h 03m

$779

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

Sun 3/23

11:35 am-12:10 am

1 stop21h 35m

Singapore Changi

Wed 3/26

11:00 am-2:40 pm

1 stop18h 40m

$787

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Sun 4/27

9:12 am-11:40 pm

2 stops23h 28m

Singapore Changi

Mon 5/12

7:30 am-5:04 pm

2 stops24h 34m

$802

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Thu 4/17

10:10 am-7:05 am

1 stop29h 55m

Singapore Changi

Wed 4/30

11:40 pm-10:55 pm

2 stops38h 15m

$809

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/19

Showing 1-10 of 47 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.

Travel insights for flights from Washington to Singapore

Get recent, data-driven insights about flights from Washington to Singapore including ideal travel times, pricing trends, and more.

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 February 20, 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 February 20, 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. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
STARLUX Airlines
9.1
Wonderful
140 reviews

Entertainment

9.1

Boarding

9.1

Food

9.0

Comfort

9.0

Overall

9.1

Crew

9.3

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
140 reviews
STARLUX Airlines
9.1
Wonderful
140 reviews

Entertainment

9.1

Boarding

9.1

Food

9.0

Comfort

9.0

Overall

9.1

Crew

9.3

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
1,200 reviews
STARLUX Airlines
9.1
Wonderful
140 reviews

Entertainment

9.1

Boarding

9.1

Food

9.0

Comfort

9.0

Overall

9.1

Crew

9.3

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
1,037 reviews
STARLUX Airlines
9.1
Wonderful
140 reviews

Entertainment

9.1

Boarding

9.1

Food

9.0

Comfort

9.0

Overall

9.1

Crew

9.3

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
8.4
Very good
842 reviews
STARLUX Airlines
9.1
Wonderful
140 reviews

Entertainment

9.1

Boarding

9.1

Food

9.0

Comfort

9.0

Overall

9.1

Crew

9.3

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
140 reviews

Entertainment

9.1

Boarding

9.1

Food

9.0

Comfort

9.0

Overall

9.1

Crew

9.3

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 33 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 ($328), United Airlines ($374), and Japan Airlines ($377).

  • 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 $309. On average you can expect to pay $1,468. The most popular route, (Seattle/Tacoma Intl - Singapore Changi), can usually be booked for $695.

  • 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 February 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
Asiana AirlinesCheapest$689Average$778FlexibilityNo cancel feeOn-time76%
Singapore AirlinesCheapest$693Average$1,131FlexibilityNo cancel feeOn-time81%
American AirlinesCheapest$705Average$1,156FlexibilityNo cancel feeOn-time71%
Philippine AirlinesCheapest$722Average$793FlexibilityNo cancel feeOn-time60%
United AirlinesCheapest$725Average$1,101FlexibilityNo cancel feeOn-time69%
Korean AirCheapest$728Average$975FlexibilityNo cancel feeOn-time81%
DeltaCheapest$750Average$1,246FlexibilityNo cancel feeOn-timeN/A
Japan AirlinesCheapest$773Average$1,022FlexibilityNo cancel feeOn-time79%
Air CanadaCheapest$791Average$1,188FlexibilityNo cancel feeOn-time67%
China AirlinesCheapest$899Average$1,003FlexibilityNo cancel feeOn-time70%
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