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$293+ 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 4/25. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SIN
Mar 5 — Mar 121
Thu 3/5
Thu 3/12
1 adult, Economy
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Cheap 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 3, 2026.

This FlightHub deal was found by Cheapflights users on 2/2. 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.
Fri 10/1610:15 am
SEA
-
SIN
Nonstop16h 20m
Singapore Airlines
Sun 10/259:00 am
SIN
-
SEA
Nonstop14h 10m
Singapore Airlines
Deal found 2/2$667
This Gurufare deal was found by Cheapflights users on 2/2. 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.
Sun 4/1210:15 am
SEA
-
SIN
Nonstop16h 20m
Singapore Airlines
Mon 4/279:15 am
SIN
-
SEA
1 stop23h 01m
Singapore Airlines
Deal found 2/2$676
This Justfly.com deal was found by Cheapflights users on 2/2. 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.
Tue 3/38:45 am
SEA
-
SIN
Nonstop17h 00m
Singapore Airlines
Tue 3/109:00 am
SIN
-
SEA
Nonstop14h 10m
Singapore Airlines
Deal found 2/2$680
This oojo deal was found by Cheapflights users on 2/1. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/2811:10 pm
SEA
-
SIN
1 stop23h 05m
Philippine Airlines
Mon 9/148:00 pm
SIN
-
SEA
1 stop39h 05m
Philippine Airlines
Deal found 2/1$686
This oojo deal was found by Cheapflights users on 2/1. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/67:10 am
SEA
-
SIN
1 stop21h 00m
Singapore Airlines
Tue 5/129:00 am
SIN
-
SEA
Nonstop14h 45m
Singapore Airlines
Deal found 2/1$722
This oojo deal was found by Cheapflights users on 2/2. 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.
Tue 5/1910:15 am
SEA
-
SIN
Nonstop16h 20m
Singapore Airlines
Tue 6/29:15 am
SIN
-
SEA
1 stop20h 12m
Singapore Airlines
Deal found 2/2$728
This deal was found by Cheapflights users on 2/1. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/2110:15 am
SEA
-
SIN
Nonstop16h 20m
Singapore Airlines
Tue 5/129:00 am
SIN
-
SEA
Nonstop14h 45m
Singapore Airlines
Deal found 2/1$742
This Trip.com deal was found by Cheapflights users on 2/2. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/1511:10 pm
SEA
-
SIN
1 stop28h 45m
Multiple Airlines
Sat 10/249:00 am
SIN
-
SEA
Nonstop14h 45m
Multiple Airlines
Deal found 2/2$745
This oojo deal was found by Cheapflights users on 2/2. 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 4/111:45 am
SEA
-
SIN
1 stop33h 00m
Cathay Pacific
Mon 4/206:00 pm
SIN
-
SEA
1 stop31h 05m
Cathay Pacific
Deal found 2/2$746
This Trip.com deal was found by Cheapflights users on 2/2. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/1511:10 pm
SEA
-
SIN
1 stop28h 45m
Multiple Airlines
Fri 10/309:00 am
SIN
-
SEA
Nonstop14h 10m
Multiple Airlines
Deal found 2/2$750
This IEagle deal was found by Cheapflights users on 2/1. 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 IEagle is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/58:45 am
SEA
-
SIN
Nonstop17h 00m
Singapore Airlines
Thu 3/199:00 am
SIN
-
SEA
Nonstop14h 10m
Singapore Airlines
Deal found 2/1$752
This Kissandfly.com deal was found by Cheapflights users on 2/2. 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 Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/78:45 am
SEA
-
SIN
Nonstop17h 00m
Singapore Airlines
Fri 3/209:00 am
SIN
-
SEA
Nonstop14h 10m
Singapore Airlines
Deal found 2/2$753

Find 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 3, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$676
(Gurufare)

One-way from

$293
(Trip.com)

Popular in

December

Cheapest in

September

Average price

$756

Good round-trip deal

$732 or less

Good one-way deal

$327 or less
Provider with most accurate pricing for Seattle/Tacoma Intl-Singapore Changi flight deals.
Search Deals
Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Singapore Changi flights.
Search Deals
From Washington to Singapore Changi
Search Deals
One-way flight from Washington to Singapore Changi
Search Deals
Highest demand for flights based on searches. 11% potential increase in price ($115 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($46 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2026
Search Deals
Price to beat on a round-trip flight from Washington to Singapore Changi.
Search Deals
Price to beat on a one-way flight from Washington to Singapore Changi.
Search Deals

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 February 3, 2026.
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

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

Sun 4/12

10:15 am-5:35 pm

Nonstop16h 20m

Singapore Changi

Mon 4/27

9:15 am-5:16 pm

1 stop23h 01m

$676

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

Tue 5/19

10:15 am-5:35 pm

Nonstop16h 20m

Singapore Changi

Tue 6/2

9:15 am-2:27 pm

1 stop20h 12m

$728

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

Wed 4/1

7:12 am-6:35 pm

1 stop20h 23m

Singapore Changi

Tue 4/14

9:00 am-6:35 pm

1 stop24h 35m

$803

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

Mon 3/2

5:20 pm-8:00 am

1 stop22h 40m

Singapore Changi

Mon 3/9

10:10 am-4:14 pm

1 stop21h 04m

$803

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

Sun 4/26

7:05 pm-6:35 pm

2 stops32h 30m

Singapore Changi

Thu 5/7

9:00 am-7:48 pm

2 stops25h 48m

$807

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

Mon 3/16

7:15 am-8:15 pm

1 stop22h 00m

Singapore Changi

Mon 3/23

10:10 am-7:28 pm

2 stops24h 18m

$807

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

Thu 2/26

5:05 am-8:15 pm

1 stop23h 10m

Singapore Changi

Thu 3/19

10:10 am-11:16 pm

2 stops28h 06m

$807

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

Sun 2/22

7:10 pm-8:15 pm

2 stops33h 05m

Singapore Changi

Mon 3/2

10:10 am-3:41 pm

1 stop21h 31m

$807

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

Tue 2/17

3:16 pm-8:00 am

2 stops24h 44m

Singapore Changi

Mon 3/2

10:10 am-3:41 pm

1 stop21h 31m

$807

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

Mon 3/2

7:10 am-5:00 am

2 stops29h 50m

Singapore Changi

Wed 3/11

10:40 am-11:21 pm

2 stops27h 41m

$822

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/31

Showing 1-10 of 40 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, May is the cheapest month in which you can book a flight from State of Washington to Singapore (average of $537). Flying from State of Washington to Singapore in June is currently the most expensive (average of $788). 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 3, 2026.

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.

How much does it cost to fly round-trip from State of Washington to Singapore?

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 101 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

  • How long is the flight from State of Washington to Singapore?

    There are many flights that can get you from State of Washington to Singapore in 16h 20m. Fly via Singapore Airlines, United Airlines, or Cathay Pacific to get the fastest option. State of Washington and Singapore are separated by a distance of 8059 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • 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 ($267), Philippine Airlines ($291), and Asiana Airlines ($344).

  • 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 $275. On average you can expect to pay $1,729. The most popular route, (Seattle/Tacoma Intl - Singapore Changi), can usually be booked for $507.

  • 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, May is the cheapest month in which you can book a flight from State of Washington to Singapore (average of $537). Flying from State of Washington to Singapore in June is currently the most expensive (average of $788). 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 February 3, 2026.
AirlineCheapestAverageFlexibilityOn-time
Singapore AirlinesCheapest$591Average$835FlexibilityNo cancel feeOn-time81%
Philippine AirlinesCheapest$650Average$694FlexibilityNo cancel feeOn-time60%
Asiana AirlinesCheapest$683Average$788FlexibilityNo cancel feeOn-time76%
Japan AirlinesCheapest$687Average$896FlexibilityNo cancel feeOn-time79%
Air CanadaCheapest$712Average$858FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$725Average$1,347FlexibilityNo cancel feeOn-time69%
DeltaCheapest$754Average$962FlexibilityNo cancel feeOn-timeN/A
Korean AirCheapest$755Average$984FlexibilityNo cancel feeOn-time81%
ANACheapest$802Average$936FlexibilityNo cancel feeOn-time80%
China AirlinesCheapest$933Average$1,273FlexibilityNo cancel feeOn-time70%

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