Singapore

$422+ Cheap flights from Washington, D.C. (WAS) 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 2/28. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — SIN
Jan 11 — Jan 181
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1. Tell us where you want to go

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Cheapflights Tip: The best prices from Washington, D.C. to Singapore Changi are usually found in August or October, booked 34 days in advance, depart on a Wednesday or Monday and return on a Tuesday

Cheap flight deals from Washington, D.C. to Singapore

Cheapest flights from Washington, D.C. to Singapore
Explore the most affordable flight options available from Washington, D.C. to Singapore. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 12, 2025.

This United Airlines deal was found by Cheapflights users on 12/10. 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 12/3010:05 pmIAD - SIN
1 stop33h 10mUnited Airlines
Mon 1/126:35 amSIN - IAD
2 stops27h 19mUnited Airlines
Deal found 12/10$1,345
This United Airlines deal was found by Cheapflights users on 12/10. 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 12/305:59 pmDCA - SIN
1 stop37h 16mUnited Airlines
Mon 1/126:35 amSIN - DCA
2 stops28h 17mUnited Airlines
Deal found 12/10$1,359
This United Airlines deal was found by Cheapflights users on 12/10. 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 12/1112:35 pmIAD - SIN
1 stop30h 25mUnited Airlines
Thu 12/1810:20 pmSIN - IAD
1 stop21h 27mUnited Airlines
Deal found 12/10$1,425
This United Airlines deal was found by Cheapflights users on 12/10. 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 12/306:30 amBWI - SIN
1 stop24h 45mUnited Airlines
Mon 1/126:35 amSIN - BWI
2 stops29h 40mUnited Airlines
Deal found 12/10$1,463
This Mytrip deal was found by Cheapflights users on 12/10. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/305:05 pmIAD - SIN
3 stops35h 10mMultiple Airlines
Mon 1/127:25 pmSIN - IAD
3 stops33h 10mMultiple Airlines
Deal found 12/10$1,477
This United Airlines deal was found by Cheapflights users on 12/11. 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.
Fri 12/122:00 pmDCA - SIN
2 stops29h 00mUnited Airlines
Fri 12/1910:10 amSIN - DCA
2 stops23h 49mUnited Airlines
Deal found 12/11$1,529
This United Airlines deal was found by Cheapflights users on 12/11. 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.
Fri 12/123:23 pmIAD - SIN
2 stops27h 37mUnited Airlines
Fri 12/1910:10 amSIN - IAD
2 stops25h 56mUnited Airlines
Deal found 12/11$1,529
This oojo deal was found by Cheapflights users on 12/11. 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 12/128:05 pmIAD - SIN
1 stop29h 50mQatar Airways
Fri 12/1910:15 amSIN - IAD
1 stop42h 40mQatar Airways
Deal found 12/11$1,592
This United Airlines deal was found by Cheapflights users on 12/10. 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.
Sat 12/2710:10 pmIAD - SIN
2 stops33h 05mUnited Airlines
Sun 1/1110:45 amSIN - IAD
2 stops47h 09mUnited Airlines
Deal found 12/10$1,620
This Expedia deal was found by Cheapflights users on 12/10. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/111:10 pmIAD - SIN
2 stops28h 50mAir Canada
Thu 12/188:50 amSIN - IAD
2 stops24h 36mAir Canada
Deal found 12/10$1,630
This United Airlines deal was found by Cheapflights users on 12/11. 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.
Mon 12/1510:20 amBWI - SIN
2 stops31h 35mUnited Airlines
Wed 12/1710:20 pmSIN - BWI
2 stops30h 58mUnited Airlines
Deal found 12/11$1,729
This United Airlines deal was found by Cheapflights users on 12/11. 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 12/176:30 amIAD - SIN
1 stop24h 45mUnited Airlines
Wed 12/2410:45 amSIN - IAD
1 stop35h 25mUnited Airlines
Deal found 12/11$1,732

Find flight deals from Washington, D.C. to Singapore

Discover tips and strategies to find the most affordable flight options for your journey from Washington, D.C. (WAS) to Singapore (SIN). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated December 12, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$1,115
(oojo)

One-way from

$422
(SmartFares)

Popular in

December

Cheapest in

August

Average price

$1,984
Provider with most accurate pricing for Washington, D.C. (WAS)-Singapore Changi flight deals.
Provider most trusted by Cheapflights users for Washington, D.C. (WAS)-Singapore Changi flights.
From Washington, D.C. (WAS) to Singapore Changi
One-way flight from Washington, D.C. (WAS) to Singapore Changi
Highest demand for flights based on searches. 16% potential increase in price ($241 potential increase over avg. RT price).
Cheapest flight prices on average. 6% potential price decrease ($71 potential savings vs. average RT price).
Average for round-trip flights in December 2025

Cheapflights Fare Finder

 
Customize your flight search to find flights from Washington, D.C. 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 December 12, 2025.
Use the filters below to find and compare flights from Washington, D.C. to Singapore that are best for you.

Fly from

Washington, D.C.

Fly to

Singapore

Route

Depart

Return

Price

Washington, D.C.Singapore

DCA - SIN

DCASIN

Washington, D.C. Reagan-National

Sun 1/18

5:59 pm-8:15 pm

1 stop37h 16m

Singapore Changi

Sun 2/15

10:10 am-9:36 pm

1 stop24h 26m

$1,185

Washington, D.C.Singapore

DCA - SIN

DCASIN

Washington, D.C. Reagan-National

Fri 1/23

7:30 am-12:55 am

2 stops28h 25m

Singapore Changi

Thu 2/5

10:10 am-9:52 pm

1 stop24h 42m

$1,187

Washington, D.C.Singapore

DCA - SIN

DCASIN

Washington, D.C. Reagan-National

Sun 2/15

6:05 am-12:10 am

2 stops29h 05m

Singapore Changi

Thu 2/26

10:40 am-10:00 pm

2 stops24h 20m

$1,188

Washington, D.C.Singapore

IAD - SIN

IADSIN

Washington, D.C. Dulles Intl

Fri 1/23

11:50 am-8:25 pm

1 stop43h 35m

Singapore Changi

Mon 2/16

10:30 pm-7:09 pm

2 stops33h 39m

$1,188

Washington, D.C.Singapore

IAD - SIN

IADSIN

Washington, D.C. Dulles Intl

Sat 1/24

5:59 pm-8:25 pm

2 stops37h 26m

Singapore Changi

Wed 2/18

10:30 pm-12:24 am

2 stops38h 54m

$1,188

Washington, D.C.Singapore

IAD - SIN

IADSIN

Washington, D.C. Dulles Intl

Sat 1/24

5:59 pm-8:25 pm

2 stops37h 26m

Singapore Changi

Sun 2/15

1:35 am-12:24 am

2 stops35h 49m

$1,188

Washington, D.C.Singapore

IAD - SIN

IADSIN

Washington, D.C. Dulles Intl

Fri 1/23

3:42 pm-8:25 pm

2 stops39h 43m

Singapore Changi

Mon 2/16

10:40 am-11:50 am

2 stops38h 10m

$1,188

Washington, D.C.Singapore

IAD - SIN

IADSIN

Washington, D.C. Dulles Intl

Fri 1/23

6:00 am-8:25 pm

2 stops49h 25m

Singapore Changi

Wed 2/18

10:30 pm-12:24 am

2 stops38h 54m

$1,188

Washington, D.C.Singapore

IAD - SIN

IADSIN

Washington, D.C. Dulles Intl

Sat 1/24

5:59 pm-8:25 pm

2 stops37h 26m

Singapore Changi

Sun 2/15

10:30 pm-8:45 pm

2 stops35h 15m

$1,188

Washington, D.C.Singapore

DCA - SIN

DCASIN

Washington, D.C. Reagan-National

Tue 2/17

12:47 pm-8:00 am

2 stops30h 13m

Singapore Changi

Sat 2/28

10:10 am-11:35 am

2 stops38h 25m

$1,192

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/11

Showing 1-10 of 60 results
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Compare providers for flights from Washington, D.C. to Singapore

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Washington, D.C. to Singapore in December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
CheapTicketsDealPrice Accuracy3 starsTrust Score*3 stars
CheapfaremartPrice Accuracy-Trust Score*1 star

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Washington, D.C.-Singapore flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Washington, D.C.-Singapore flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Washington, D.C.-Singapore flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Washington, D.C.-Singapore flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Washington, D.C.-Singapore flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Washington, D.C. to Singapore

Have a flexible travel schedule? Discover the best time to fly to Singapore from Washington, D.C. 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, D.C. to Singapore

How far ahead should I book a flight from Washington, D.C. to Singapore?

Use this chart to determine the optimal time to book a round-trip flight from Washington, D.C. to Singapore. Price data was last updated on December 5, 2025.

To ensure you get the cheapest price possible for a flight from Washington, D.C. to Singapore, you should look to book at least 34 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

What is the cheapest month to book a flight from Washington, D.C. to Singapore?

Currently, November is the cheapest month in which you can book a flight from Washington, D.C. to Singapore (average of $794). Flying from Washington, D.C. to Singapore in June is currently the most expensive (average of $1,144). 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 WAS to SIN?

Find hourly flight availability from Washington, D.C. 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 December 12, 2025.

A simple way to save on the total cost of your ticket is to fly from Washington, D.C. to Singapore in the evening. If you’re flexible enough to do this you can expect to save up to 24% on your trip compared to booking a flight in the morning.

What is the cheapest day to fly from Washington, D.C. to Singapore?

Use this chart to determine the cheapest time to fly round-trip from Washington, D.C. to Singapore. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Washington, D.C. to Singapore flight should consider departing on Thursday at noon when fares are most often at their lowest. Tuesday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

What’s the top layover airport for flights from Washington, D.C. to Singapore?

Share of 1-stop round-trip flights from Washington, D.C. to Singapore chosen by Cheapflights users in the past 12 months, using the same layover each way.

Doha (DOH) – chosen by Cheapflights users on 50% of 1-stop itineraries from Washington, D.C. to Singapore on Cheapflights.

What’s the cheapest layover airport for flights from Washington, D.C. to Singapore?

Average round-trip fare for 1-stop flights from Washington, D.C. to Singapore, chosen by Cheapflights users in the past 12 months, with the same layover each way.

Istanbul (IST) is the most affordable 1-stop option, with an average round-trip price of $835.

What’s the fastest layover option from Washington, D.C. to Singapore?

Shortest average travel time for 1-stop one-way flights from Washington, D.C. to Singapore, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.

Flights via Doha (DOH) have the shortest average one-way travel time for 1-stop routes: 22h 00m.

Which airport typically offers the quickest layover for flights from Washington, D.C. to Singapore?

Average layover duration for 1-stop one-way flights from Washington, D.C. to Singapore, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Flights via Istanbul (IST) offer the fastest connection on this route, with an average layover time of 1h 28m.

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 December 12, 2025.
Get a feel of what it's like to fly with Qatar Airways, Etihad Airways, and United Airlines from Washington, D.C. 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.

Entertainment

7.4

Crew

7.9

Boarding

7.5

Overall

7.4

Food

7.3

Comfort

7.4

Reviews

1 / 20
6.0
Good

Chris,Jul 2025

DFW - DOH

Too crammed for the amount you have to pay. That was very uncomfortable

Entertainment

7.4

Crew

7.9

Boarding

7.5

Overall

7.4

Food

7.3

Comfort

7.4

Reviews

1 / 20
6.0
Good

Chris,Jul 2025

DFW - DOH

Too crammed for the amount you have to pay. That was very uncomfortable

Entertainment

7.4

Crew

7.9

Boarding

7.5

Overall

7.4

Food

7.3

Comfort

7.4

Reviews

1 / 20
6.0
Good

Chris,Jul 2025

DFW - DOH

Too crammed for the amount you have to pay. That was very uncomfortable

Entertainment

7.4

Crew

7.9

Boarding

7.5

Overall

7.4

Food

7.3

Comfort

7.4

Reviews

1 / 20
6.0
Good

Chris,Jul 2025

DFW - DOH

Too crammed for the amount you have to pay. That was very uncomfortable

Entertainment

7.4

Crew

7.9

Boarding

7.5

Overall

7.4

Food

7.3

Comfort

7.4

Reviews

1 / 20
6.0
Good

Chris,Jul 2025

DFW - DOH

Too crammed for the amount you have to pay. That was very uncomfortable

Entertainment

7.4

Crew

7.9

Boarding

7.5

Overall

7.4

Food

7.3

Comfort

7.4

Reviews

1 / 20
6.0
Good

Chris,Jul 2025

DFW - DOH

Too crammed for the amount you have to pay. That was very uncomfortable

Related info for your journey

Find useful and relevant information for your journey from Washington, D.C. 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, D.C.?

    For a flight from Washington, D.C. to Singapore, you will be flying into Changi. Singapore Changi (SIN) is just 10.5 mi from the center of the city. Changi is the only Singapore airport and it handles 0 inbound flights from Washington, D.C. per day. 9 airlines have flights to Singapore Changi from Washington, D.C. on a regular basis.

  • How long is the flight from Washington, D.C. to Singapore?

    United Airlines, Delta, and Korean Air can get you from Washington, D.C. to Singapore in just under 29h 05m. Your travel time can differ by up to 14h 30m. The distance between Washington, D.C. and Singapore is about 9651 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines flying from Washington, D.C. to Singapore round-trip?

    According to our current data, Air India ($807), Etihad Airways ($833), and Turkish Airlines ($847) offers the cheapest pricing from Washington, D.C. to Singapore. Users have found that Air India is 33% cheaper than the other options available to this destination.

  • What are the cheapest airlines to fly from Washington, D.C. to Singapore one-way?

    The cheapest airlines for a one-way flight from Washington, D.C. to Singapore are Turkish Airlines ($444), Etihad Airways ($481), and Qatar Airways ($510).

  • What are the most popular routes from Washington, D.C. to Singapore?

  • Where are the most common layover locations when flying from Washington, D.C. to Singapore?

  • What are some popular things to do or see while on a layover in Istanbul?

    Istanbul travelers tend to visit Taksim Square, Beyazit Meydani, and Laleli Camii more than anywhere else. Taksim Square, Beyazit Meydani, and Laleli Camii can be accessed by traveling approximately 20.8 mi, 21.7 mi, and 21.5 mi, respectively from Istanbul. Travelers in need of a car in Istanbul can rent one for about $34 per day.

  • Where are the least popular layover locations for Washington, D.C. to Singapore flights?

  • Can I find deals for flights from Washington, D.C. to Singapore that include hotel bookings?

    Yes. In addition to deals on Washington, D.C. to Singapore flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Washington, D.C. to Singapore?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Washington, D.C. to Singapore.

  • Can I find deals for business class flights from Washington, D.C. to Singapore?

    Yes. Cheapflights offers flight deals from Washington, D.C. 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 Washington, D.C. to Singapore?

    Currently, November is the cheapest month in which you can book a flight from Washington, D.C. to Singapore (average of $794). Flying from Washington, D.C. to Singapore in June is currently the most expensive (average of $1,144). 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, D.C. to Singapore

See prices for flight routes from nearby airports that may be better suited for you.

Top 9 airlines flying from Washington, D.C. to Singapore

Discover the top 9 airlines that operate flights from Washington, D.C. 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 December 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
Air IndiaCheapest$807Average$996FlexibilityNo cancel feeOn-timeN/A
Etihad AirwaysCheapest$833Average$990FlexibilityNo cancel feeOn-time75%
Turkish AirlinesCheapest$847Average$1,016FlexibilityNo cancel feeOn-time77%
Korean AirCheapest$944Average$1,199FlexibilityNo cancel feeOn-time81%
Qatar AirwaysCheapest$1,014Average$1,296FlexibilityNo cancel feeOn-time68%
JetBlueCheapest$1,066Average$2,053FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$1,174Average$1,379FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$1,196Average$1,199FlexibilityNo cancel feeOn-time71%
ANACheapest$1,499Average$2,103FlexibilityNo cancel feeOn-time80%

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