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$276+ 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 9/15. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — SIN
Aug 25 — Sep 11
Mon 8/25
Mon 9/1
1 adult, Economy
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Cheapflights Tip: The best prices from Washington, D.C. to Singapore Changi are usually found in August or October, booked 50 days in advance, depart on a Wednesday or Monday and return on a Tuesday

Cheap 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 August 20, 2025.

Round-trip from

$799
(Mytrip)

One-way from

$276
(Kiwi.com)

Popular in

December

Cheapest in

August

Average price

$738
From Washington, D.C. (WAS) to Singapore Changi
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One-way flight from Washington, D.C. (WAS) to Singapore Changi
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Highest demand for flights based on searches. 12% potential increase in price ($160 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($60 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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Find 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 August 20, 2025.

This Mytrip deal was found by Cheapflights users on 8/18. 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.
Wed 9/175:45 amBWI - SIN
2 stops29h 35mMultiple Airlines
Wed 9/242:35 pmSIN - BWI
2 stops28h 26mMultiple Airlines
Deal found 8/18$799
This Mytrip deal was found by Cheapflights users on 8/18. 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.
Thu 10/25:45 amBWI - SIN
2 stops29h 35mMultiple Airlines
Thu 10/92:35 pmSIN - BWI
2 stops28h 00mMultiple Airlines
Deal found 8/18$845
This CrystalTravel deal was found by Cheapflights users on 8/18. 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 CrystalTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/2510:05 pmIAD - SIN
1 stop23h 30mEtihad Airways
Sat 11/87:25 pmSIN - IAD
1 stop33h 40mEtihad Airways
Deal found 8/18$866
This Trip.com deal was found by Cheapflights users on 8/20. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/45:45 amBWI - SIN
2 stops36h 30mMultiple Airlines
Sat 10/118:40 pmSIN - BWI
2 stops45h 55mMultiple Airlines
Deal found 8/20$876
This lastminute.com deal was found by Cheapflights users on 8/17. 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 lastminute.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/1110:05 pmIAD - SIN
1 stop23h 35mEtihad Airways
Mon 10/209:10 pmSIN - IAD
1 stop31h 00mEtihad Airways
Deal found 8/17$879
This Mytrip deal was found by Cheapflights users on 8/18. 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.
Mon 9/85:45 amBWI - SIN
2 stops31h 05mMultiple Airlines
Tue 9/161:25 pmSIN - BWI
2 stops29h 36mMultiple Airlines
Deal found 8/18$884
This Expedia deal was found by Cheapflights users on 8/19. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/3110:05 pmIAD - SIN
1 stop23h 35mEtihad Airways
Sun 9/149:10 pmSIN - IAD
1 stop31h 00mEtihad Airways
Deal found 8/19$888
This Gotogate deal was found by Cheapflights users on 8/18. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/2510:05 pmIAD - SIN
1 stop23h 35mEtihad Airways
Mon 9/89:10 pmSIN - IAD
1 stop31h 00mEtihad Airways
Deal found 8/18$889
This Gotogate deal was found by Cheapflights users on 8/19. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1110:05 pmIAD - SIN
1 stop23h 35mEtihad Airways
Tue 9/309:10 pmSIN - IAD
1 stop31h 00mEtihad Airways
Deal found 8/19$894
This Gotogate deal was found by Cheapflights users on 8/19. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/410:05 pmIAD - SIN
1 stop23h 35mEtihad Airways
Fri 9/199:10 pmSIN - IAD
1 stop31h 00mEtihad Airways
Deal found 8/19$895
This Gotogate deal was found by Cheapflights users on 8/20. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/910:05 pmIAD - SIN
1 stop24h 20mEtihad Airways
Mon 9/299:10 pmSIN - IAD
1 stop31h 00mEtihad Airways
Deal found 8/20$898
This Gotogate deal was found by Cheapflights users on 8/20. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/910:05 pmIAD - SIN
1 stop24h 20mEtihad Airways
Tue 9/239:10 pmSIN - IAD
1 stop31h 00mEtihad Airways
Deal found 8/20$900

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 August 20, 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

BaltimoreSingapore

BWI - SIN

BWISIN

Baltimore/Washington

Wed 9/17

5:45 am-11:20 pm

2 stops29h 35m

Singapore Changi

Wed 9/24

2:35 pm-7:01 am

2 stops28h 26m

$799

BaltimoreSingapore

BWI - SIN

BWISIN

Baltimore/Washington

Thu 10/2

5:45 am-11:20 pm

2 stops29h 35m

Singapore Changi

Thu 10/9

2:35 pm-6:35 am

2 stops28h 00m

$845

BaltimoreSingapore

BWI - SIN

BWISIN

Baltimore/Washington

Mon 9/8

5:45 am-12:50 am

2 stops31h 05m

Singapore Changi

Tue 9/16

1:25 pm-7:01 am

2 stops29h 36m

$884

Washington, D.C.Singapore

IAD - SIN

IADSIN

Washington, D.C. Dulles Intl

Sat 10/11

10:05 pm-9:40 am

1 stop23h 35m

Singapore Changi

Mon 10/20

9:10 pm-4:10 pm

1 stop31h 00m

$886

Washington, D.C.Singapore

IAD - SIN

IADSIN

Washington, D.C. Dulles Intl

Thu 9/11

10:05 pm-9:40 am

1 stop23h 35m

Singapore Changi

Tue 9/30

9:10 pm-4:10 pm

1 stop31h 00m

$894

Washington, D.C.Singapore

IAD - SIN

IADSIN

Washington, D.C. Dulles Intl

Sun 9/14

10:05 pm-9:40 am

1 stop23h 35m

Singapore Changi

Tue 9/30

9:10 pm-4:10 pm

1 stop31h 00m

$894

Washington, D.C.Singapore

IAD - SIN

IADSIN

Washington, D.C. Dulles Intl

Thu 9/18

10:05 pm-9:40 am

1 stop23h 35m

Singapore Changi

Fri 10/3

9:10 pm-4:10 pm

1 stop31h 00m

$900

Washington, D.C.Singapore

IAD - SIN

IADSIN

Washington, D.C. Dulles Intl

Wed 9/3

10:05 pm-9:40 am

1 stop23h 35m

Singapore Changi

Thu 9/18

9:10 pm-4:10 pm

1 stop31h 00m

$901

Washington, D.C.Singapore

IAD - SIN

IADSIN

Washington, D.C. Dulles Intl

Mon 10/13

10:05 pm-9:40 am

1 stop23h 35m

Singapore Changi

Fri 11/7

7:25 pm-4:05 pm

1 stop33h 40m

$904

Washington, D.C.Singapore

IAD - SIN

IADSIN

Washington, D.C. Dulles Intl

Mon 9/1

10:05 pm-9:40 am

1 stop23h 35m

Singapore Changi

Wed 9/10

9:10 pm-4:10 pm

1 stop31h 00m

$906

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/20

Showing 1-10 of 58 results
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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 August 8, 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 50 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, October is the cheapest month in which you can book a flight from Washington, D.C. to Singapore (average of $996). Flying from Washington, D.C. 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 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 August 20, 2025.

A simple way to save on the total cost of your ticket is to fly from Washington, D.C. to Singapore at noon. If you’re flexible enough to do this you can expect to save up to 25% on your trip compared to booking a flight in the afternoon.

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 Monday evenings when fares are most often at their lowest. Friday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

How much does it cost to fly round-trip from Washington, D.C. to Singapore?

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 54% 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 August 20, 2025.
Get a feel of what it's like to fly with Korean Air, Qatar 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.
Korean Air
8.4
Very good
1,131 reviews

Overall

8.4

Crew

8.7

Food

8.1

Comfort

8.3

Boarding

8.5

Entertainment

8.2

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
Korean Air
8.4
Very good
1,131 reviews
Korean Air
8.4
Very good
1,131 reviews

Overall

8.4

Crew

8.7

Food

8.1

Comfort

8.3

Boarding

8.5

Entertainment

8.2

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
Qatar Airways
7.4
Good
3,611 reviews
Korean Air
8.4
Very good
1,131 reviews

Overall

8.4

Crew

8.7

Food

8.1

Comfort

8.3

Boarding

8.5

Entertainment

8.2

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
United Airlines
7.4
Good
8,928 reviews
Korean Air
8.4
Very good
1,131 reviews

Overall

8.4

Crew

8.7

Food

8.1

Comfort

8.3

Boarding

8.5

Entertainment

8.2

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
Turkish Airlines
7.3
Good
3,949 reviews
Korean Air
8.4
Very good
1,131 reviews

Overall

8.4

Crew

8.7

Food

8.1

Comfort

8.3

Boarding

8.5

Entertainment

8.2

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
Air India
5.5
Fair
2,929 reviews
Korean Air
8.4
Very good
1,131 reviews

Overall

8.4

Crew

8.7

Food

8.1

Comfort

8.3

Boarding

8.5

Entertainment

8.2

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.

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. 10 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?

    Etihad Airways, Air Canada, and Singapore Airlines can get you from Washington, D.C. to Singapore in just under 23h 35m. Your travel time can differ by up to 13h 30m. The distance between Washington, D.C. and Singapore is about 9644 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), Turkish Airlines ($820), and Etihad Airways ($833) offers the cheapest pricing from Washington, D.C. to Singapore. Users have found that Air India is 30% cheaper than the other options available to this destination.

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

    The most popular route from Washington, D.C. to Singapore is Washington, D.C. Dulles Intl - Singapore Changi. You may also consider Washington, D.C. Reagan-National - Singapore Changi or Baltimore/Washington - Singapore Changi.

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

    Flights departing from Washington, D.C. and landing in Singapore layover in Istanbul most frequently.

  • 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 Sultan Ahmet Camii more than anywhere else. Taksim Square, Beyazit Meydani, and Sultan Ahmet Camii can be accessed by traveling approximately 20.8 mi, 21.7 mi, and 22.3 mi, respectively from Istanbul. Travelers in need of a car in Istanbul can rent one for about $51 per day.

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

    Washington, D.C. to Singapore flights have a layover in Doha the least frequently.

  • 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, October is the cheapest month in which you can book a flight from Washington, D.C. to Singapore (average of $996). Flying from Washington, D.C. 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

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Alternative routes for Washington, D.C. to Singapore

See prices for flight routes from nearby airports that may be better suited for you.
Dulles Intl to Singapore flights
Reagan-National to Singapore flights

Top 10 airlines flying from Washington, D.C. to Singapore

Discover the top 10 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 August 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
Air IndiaCheapest$807Average$996FlexibilityNo cancel feeOn-timeN/A
Turkish AirlinesCheapest$820Average$951FlexibilityNo cancel feeOn-time77%
Etihad AirwaysCheapest$833Average$932FlexibilityNo cancel feeOn-time75%
Air CanadaCheapest$938Average$1,526FlexibilityNo cancel feeOn-time67%
Korean AirCheapest$944Average$1,199FlexibilityNo cancel feeOn-time81%
United AirlinesCheapest$985Average$1,366FlexibilityNo cancel feeOn-time69%
Qatar AirwaysCheapest$996Average$1,270FlexibilityNo cancel feeOn-time68%
JetBlueCheapest$1,024Average$1,139FlexibilityNo cancel feeOn-time62%
Alaska AirlinesCheapest$1,066Average$1,128FlexibilityNo cancel feeOn-time75%
American AirlinesCheapest$1,196Average$1,223FlexibilityNo cancel feeOn-time71%

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