HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Singapore

$458+ 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 5/15. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SIN
Apr 22 — Apr 291
Tue 4/22
Tue 4/29
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Washington to Singapore with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 April 17, 2025.

Most accurate provider

AranGrant
3 stars

Most trusted provider

AranGrant
3 stars

Round-trip from

$707
(Air Canada)

One-way from

$458
(StudentUniverse)

Popular in

December

Cheapest in

March

Average price

$886

Good round-trip deal

$975 or less

Good one-way deal

$350 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. 6% potential increase in price ($73 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($51 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2025
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

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 April 17, 2025.

This Air Canada deal was found by Cheapflights users on 4/17. 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 9/47:40 pmPDX - SIN
1 stop20h 25mAir Canada
Thu 9/259:10 amSIN - PDX
1 stop24h 36mAir Canada
Deal found 4/17$707
This Asiana Airlines deal was found by Cheapflights users on 4/16. 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 Asiana Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/122:15 pmSEA - SIN
1 stop40h 15mAsiana Airlines
Tue 5/2010:50 pmSIN - SEA
1 stop28h 40mAsiana Airlines
Deal found 4/16$756
This Korean Air deal was found by Cheapflights users on 4/16. 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 Korean Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/2712:50 pmSEA - SIN
1 stop25h 10mKorean Air
Thu 5/87:30 amSIN - SEA
1 stop18h 10mKorean Air
Deal found 4/16$757
This Justfly.com deal was found by Cheapflights users on 4/17. 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 7/221:45 pmSEA - SIN
1 stop26h 20mAir Canada
Thu 7/319:10 amSIN - SEA
1 stop28h 06mAir Canada
Deal found 4/17$760
This FlightHub deal was found by Cheapflights users on 4/17. 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 9/2610:15 amSEA - SIN
Nonstop16h 20mSingapore Airlines
Fri 10/106:40 pmSIN - SEA
1 stop20h 31mSingapore Airlines
Deal found 4/17$763
This Booking.com deal was found by Cheapflights users on 4/17. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/77:40 pmPDX - SIN
1 stop20h 25mMultiple Airlines
Mon 10/202:15 amSIN - PDX
3 stops27h 31mMultiple Airlines
Deal found 4/17$768
This Air Canada deal was found by Cheapflights users on 4/16. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/81:45 pmSEA - SIN
2 stops42h 35mMultiple Airlines
Wed 10/158:00 amSIN - SEA
2 stops25h 36mMultiple Airlines
Deal found 4/16$798
This Delta deal was found by Cheapflights users on 4/17. 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.
Fri 8/299:10 amPDX - SIN
2 stops28h 50mDelta
Thu 9/117:30 amSIN - PDX
2 stops26h 43mDelta
Deal found 4/17$802
This Korean Air deal was found by Cheapflights users on 4/17. 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 Korean Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/279:12 amPDX - SIN
2 stops28h 48mKorean Air
Wed 5/71:10 amSIN - PDX
2 stops28h 40mKorean Air
Deal found 4/17$808
This oojo deal was found by Cheapflights users on 4/17. 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 9/311:35 pmSEA - SIN
1 stop22h 45mPhilippine Airlines
Tue 9/912:20 amSIN - SEA
1 stop33h 55mPhilippine Airlines
Deal found 4/17$829
This oojo deal was found by Cheapflights users on 4/17. 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.
Sun 8/311:40 amSEA - SIN
1 stop31h 55mChina Airlines
Sun 9/72:00 amSIN - SEA
1 stop32h 45mChina Airlines
Deal found 4/17$871
This United Airlines deal was found by Cheapflights users on 4/17. 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.
Thu 5/86:30 pmPDX - SIN
1 stop21h 15mUnited Airlines
Sat 5/248:45 amSIN - PDX
1 stop18h 48mUnited Airlines
Deal found 4/17$877

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 April 17, 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

7:40 pm-7:05 am

1 stop20h 25m

Singapore Changi

Thu 9/25

9:10 am-6:46 pm

1 stop24h 36m

$707

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

Mon 5/12

2:15 pm-9:30 pm

1 stop40h 15m

Singapore Changi

Tue 5/20

10:50 pm-12:30 pm

1 stop28h 40m

$756

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

Sun 4/27

12:50 pm-5:00 am

1 stop25h 10m

Singapore Changi

Wed 5/7

10:30 pm-10:40 am

1 stop27h 10m

$757

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

Tue 6/3

2:55 pm-7:05 am

1 stop25h 10m

Singapore Changi

Thu 6/19

9:10 am-1:01 pm

1 stop18h 51m

$760

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Tue 10/7

7:40 pm-7:05 am

1 stop20h 25m

Singapore Changi

Tue 10/21

6:00 am-2:46 pm

3 stops23h 46m

$768

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

Tue 5/20

5:30 am-12:50 am

2 stops28h 20m

Singapore Changi

Tue 6/3

9:10 am-12:58 pm

1 stop18h 48m

$778

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Fri 8/29

9:10 am-5:00 am

2 stops28h 50m

Singapore Changi

Thu 9/11

7:30 am-7:13 pm

2 stops26h 43m

$802

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Sun 4/27

9:12 am-5:00 am

2 stops28h 48m

Singapore Changi

Wed 5/7

1:10 am-2:50 pm

2 stops28h 40m

$808

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Wed 9/17

7:00 am-7:10 pm

1 stop21h 10m

Singapore Changi

Tue 9/30

9:15 am-1:50 pm

1 stop19h 35m

$838

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Thu 5/8

6:30 pm-6:45 am

1 stop21h 15m

Singapore Changi

Sat 5/24

8:45 am-12:33 pm

1 stop18h 48m

$877

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/17

Showing 1-10 of 49 results
1
2
3
...
5

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 April 17, 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 April 17, 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
154 reviews

Boarding

9.0

Overall

9.1

Food

8.9

Crew

9.3

Comfort

9.0

Entertainment

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
154 reviews
STARLUX Airlines
9.1
Wonderful
154 reviews

Boarding

9.0

Overall

9.1

Food

8.9

Crew

9.3

Comfort

9.0

Entertainment

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.
EVA Air
8.4
Very good
1,177 reviews
STARLUX Airlines
9.1
Wonderful
154 reviews

Boarding

9.0

Overall

9.1

Food

8.9

Crew

9.3

Comfort

9.0

Entertainment

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
1,064 reviews
STARLUX Airlines
9.1
Wonderful
154 reviews

Boarding

9.0

Overall

9.1

Food

8.9

Crew

9.3

Comfort

9.0

Entertainment

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
1,447 reviews
STARLUX Airlines
9.1
Wonderful
154 reviews

Boarding

9.0

Overall

9.1

Food

8.9

Crew

9.3

Comfort

9.0

Entertainment

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
845 reviews
STARLUX Airlines
9.1
Wonderful
154 reviews

Boarding

9.0

Overall

9.1

Food

8.9

Crew

9.3

Comfort

9.0

Entertainment

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 50 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 ($458), Asiana Airlines ($472), and Air Canada ($474).

  • 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 $326. On average you can expect to pay $2,352. The most popular route, (Seattle/Tacoma Intl - Singapore Changi), can usually be booked for $610.

  • 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

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Washington to Singapore

See prices for flight routes from nearby airports that may be better suited for you.
John F Kennedy Intl to Singapore flights
Newark to Singapore flights
San Francisco to Singapore flights
Los Angeles to Singapore flights
LaGuardia to Singapore flights
Seattle to Singapore flights
Dallas/Fort Worth to Singapore flights
Santa Ana to Singapore flights
Ontario to Singapore flights
Burbank to Singapore flights
O'Hare Intl to Singapore flights
San Jose to Singapore flights
Oakland to Singapore flights
Hobby to Singapore flights
Reagan-National to Singapore flights
Atlanta to Singapore flights
Boston to Singapore flights
Dulles Intl to Singapore flights
Baltimore to Singapore flights
Portland to Singapore flights
Midway to Singapore flights
George Bush Intcntl to Singapore flights
Charlotte to Singapore flights
Honolulu to Singapore flights
Orlando to Singapore flights
Minneapolis to Singapore flights
Detroit to Singapore flights
Raleigh to Singapore flights
Sacramento to Singapore flights
Sky Harbor Intl to Singapore flights
San Diego to Singapore flights
Miami to Singapore flights
Denver to Singapore flights
Philadelphia to Singapore flights
Love Field to Singapore flights
Las Vegas to Singapore flights
Indianapolis to Singapore flights
Austin to Singapore flights
Nashville to Singapore flights
Kansas City to Singapore flights
Grand Rapids to Singapore flights
Tampa to Singapore flights
Providence to Singapore flights
Fort Lauderdale to Singapore flights
Des Moines to Singapore flights
Albany to Singapore flights
St. Louis to Singapore flights
Columbus to Singapore flights
Hartford to Singapore flights
Jacksonville to Singapore flights

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 April 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
Singapore AirlinesCheapest$685Average$1,133FlexibilityNo cancel feeOn-time81%
Asiana AirlinesCheapest$689Average$778FlexibilityNo cancel feeOn-time76%
Philippine AirlinesCheapest$694Average$782FlexibilityNo cancel feeOn-time60%
Korean AirCheapest$722Average$890FlexibilityNo cancel feeOn-time81%
Japan AirlinesCheapest$724Average$1,185FlexibilityNo cancel feeOn-time79%
United AirlinesCheapest$725Average$928FlexibilityNo cancel feeOn-time69%
DeltaCheapest$750Average$1,234FlexibilityNo cancel feeOn-timeN/A
Air CanadaCheapest$755Average$913FlexibilityNo cancel feeOn-time67%
China AirlinesCheapest$899Average$1,057FlexibilityNo cancel feeOn-time70%
Alaska AirlinesCheapest$972Average$1,075FlexibilityNo cancel feeOn-time75%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.