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$399+ Cheap flights from Washington, D.C. (WAS) to Singapore

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 11/8. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — SIN
Oct 19 — Oct 261
Sun 10/19
Sun 10/26
1 adult, Economy
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Cheap flight deals from Washington, D.C. to Singapore

Keep the following information in mind while searching for Washington, D.C. to Singapore flight deals. Data was last updated September 19, 2025.

Round-trip from

$893
(oojo)

One-way from

$399
(Kiwi.com)

Popular in

December

Cheapest in

August

Average price

$1,191
From Washington, D.C. (WAS) to Singapore
Search Deals
One-way flight from Washington, D.C. (WAS) to Singapore
Search Deals
Highest demand for flights based on searches. 11% potential increase in price ($156 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($59 potential savings vs. average RT price).
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Average for round-trip flights in September 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 September 19, 2025.

This Booking.com deal was found by Cheapflights users on 9/18. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/221:30 pmIAD - SIN
2 stops39h 45mIndiGo
Wed 9/247:45 pmSIN - IAD
2 stops36h 00mIndiGo
Deal found 9/18$890
This oojo deal was found by Cheapflights users on 9/18. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/46:58 pmDCA - SIN
1 stop35h 07mSingapore Airlines
Thu 11/139:00 amSIN - DCA
1 stop25h 59mSingapore Airlines
Deal found 9/18$893
This Trip.com deal was found by Cheapflights users on 9/17. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/46:58 pmDCA - SIN
1 stop35h 07mMultiple Airlines
Thu 11/139:00 amSIN - DCA
1 stop25h 59mMultiple Airlines
Deal found 9/17$916
This Booking.com deal was found by Cheapflights users on 9/17. 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 10/149:40 pmIAD - SIN
2 stops31h 35mIndiGo
Sat 10/257:45 pmSIN - IAD
2 stops36h 30mIndiGo
Deal found 9/17$922
This Booking.com deal was found by Cheapflights users on 9/18. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/301:30 pmIAD - SIN
2 stops40h 15mIndiGo
Thu 10/237:45 pmSIN - IAD
2 stops36h 00mIndiGo
Deal found 9/18$926
This Booking.com deal was found by Cheapflights users on 9/18. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/89:10 pmIAD - SIN
2 stops31h 10mIndiGo
Tue 11/187:40 pmSIN - IAD
2 stops36h 35mIndiGo
Deal found 9/18$935
This Mytrip deal was found by Cheapflights users on 9/17. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/145:35 amBWI - SIN
2 stops29h 45mMultiple Airlines
Sat 10/257:10 pmSIN - BWI
3 stops47h 25mMultiple Airlines
Deal found 9/17$944
This Booking.com deal was found by Cheapflights users on 9/17. 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.
Sat 10/111:30 pmIAD - SIN
2 stops39h 45mIndiGo
Mon 10/137:45 pmSIN - IAD
2 stops36h 00mIndiGo
Deal found 9/17$946
This Booking.com deal was found by Cheapflights users on 9/18. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/91:30 pmIAD - SIN
2 stops38h 50mIndiGo
Fri 11/147:40 pmSIN - IAD
2 stops36h 35mIndiGo
Deal found 9/18$949
This Booking.com deal was found by Cheapflights users on 9/18. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/49:40 pmIAD - SIN
2 stops31h 35mIndiGo
Sun 10/197:45 pmSIN - IAD
2 stops36h 00mIndiGo
Deal found 9/18$961
This Mytrip deal was found by Cheapflights users on 9/17. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/255:35 amBWI - SIN
2 stops30h 05mMultiple Airlines
Thu 10/308:55 amSIN - BWI
2 stops33h 40mMultiple Airlines
Deal found 9/17$969
This Booking.com deal was found by Cheapflights users on 9/18. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/41:30 pmIAD - SIN
2 stops38h 50mIndiGo
Thu 11/137:45 pmSIN - IAD
2 stops36h 30mIndiGo
Deal found 9/18$969

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 September 19, 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

IAD - SIN

IADSIN

Washington, D.C. Dulles Intl

Sun 11/9

10:40 am-9:15 pm

1 stop21h 35m

Singapore Changi

Tue 11/18

8:15 pm-3:55 pm

1 stop32h 40m

$1,123

Washington, D.C.Singapore

IAD - SIN

IADSIN

Washington, D.C. Dulles Intl

Tue 11/4

8:05 pm-2:55 pm

1 stop29h 50m

Singapore Changi

Wed 11/12

3:15 am-3:55 pm

1 stop25h 40m

$1,123

Washington, D.C.Singapore

DCA - SIN

DCASIN

Washington, D.C. Reagan-National

Thu 10/2

7:00 am-6:25 pm

1 stop23h 25m

Singapore Changi

Mon 10/6

8:40 pm-4:52 pm

1 stop32h 12m

$1,125

Washington, D.C.Singapore

DCA - SIN

DCASIN

Washington, D.C. Reagan-National

Tue 11/11

5:59 pm-8:00 am

1 stop25h 01m

Singapore Changi

Tue 11/18

10:20 pm-11:29 am

2 stops26h 09m

$1,125

Washington, D.C.Singapore

DCA - SIN

DCASIN

Washington, D.C. Reagan-National

Wed 11/5

5:59 pm-8:00 am

1 stop25h 01m

Singapore Changi

Tue 11/18

10:10 am-9:43 pm

1 stop24h 33m

$1,125

Washington, D.C.Singapore

DCA - SIN

DCASIN

Washington, D.C. Reagan-National

Tue 11/4

5:59 pm-8:00 am

1 stop25h 01m

Singapore Changi

Mon 11/17

10:10 am-9:43 pm

1 stop24h 33m

$1,125

Washington, D.C.Singapore

DCA - SIN

DCASIN

Washington, D.C. Reagan-National

Mon 2/16

5:50 pm-8:00 am

1 stop25h 10m

Singapore Changi

Tue 2/24

10:10 am-9:39 pm

1 stop24h 29m

$1,125

Washington, D.C.Singapore

DCA - SIN

DCASIN

Washington, D.C. Reagan-National

Mon 2/9

5:59 pm-8:00 am

1 stop25h 01m

Singapore Changi

Mon 2/23

10:20 pm-11:35 am

2 stops26h 15m

$1,125

Washington, D.C.Singapore

DCA - SIN

DCASIN

Washington, D.C. Reagan-National

Thu 10/16

7:00 am-6:25 pm

1 stop23h 25m

Singapore Changi

Mon 10/27

10:20 pm-11:29 am

2 stops25h 09m

$1,125

Washington, D.C.Singapore

DCA - SIN

DCASIN

Washington, D.C. Reagan-National

Tue 10/14

5:59 pm-6:15 am

1 stop24h 16m

Singapore Changi

Tue 10/21

8:45 am-9:51 pm

1 stop25h 06m

$1,125

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/18

Showing 1-10 of 60 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

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 $994). Flying from Washington, D.C. to Singapore in December is currently the most expensive (average of $1,665). 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 SG?

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 September 19, 2025.

When flying from Washington, D.C. 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.

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 September 19, 2025.
Read reviews from past customers who have flown Korean Air, Qatar Airways, and United Airlines from Washington, D.C. to Singapore. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Korean Air
8.4
Very good
1,140 reviews

Entertainment

8.2

Overall

8.4

Boarding

8.5

Comfort

8.3

Food

8.1

Crew

8.7

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
1,140 reviews
Korean Air
8.4
Very good
1,140 reviews

Entertainment

8.2

Overall

8.4

Boarding

8.5

Comfort

8.3

Food

8.1

Crew

8.7

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
3,624 reviews
Korean Air
8.4
Very good
1,140 reviews

Entertainment

8.2

Overall

8.4

Boarding

8.5

Comfort

8.3

Food

8.1

Crew

8.7

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
8,926 reviews
Korean Air
8.4
Very good
1,140 reviews

Entertainment

8.2

Overall

8.4

Boarding

8.5

Comfort

8.3

Food

8.1

Crew

8.7

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
3,969 reviews
Korean Air
8.4
Very good
1,140 reviews

Entertainment

8.2

Overall

8.4

Boarding

8.5

Comfort

8.3

Food

8.1

Crew

8.7

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
2,934 reviews
Korean Air
8.4
Very good
1,140 reviews

Entertainment

8.2

Overall

8.4

Boarding

8.5

Comfort

8.3

Food

8.1

Crew

8.7

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.

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

    Qatar Airways and United Airlines can get you from Washington, D.C. to Singapore in just under 21h 35m. Your travel time can differ by up to 1h 50m. 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 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.

  • 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 $994). Flying from Washington, D.C. to Singapore in December is currently the most expensive (average of $1,665). 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, D.C. to Singapore

See prices for flight routes from nearby airports that may be better suited for you.
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Top 8 airlines flying from Washington, D.C. to Singapore

Discover the top 8 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 September 19, 2025.
AirlineCheapestAverageFlexibilityOn-time
Air IndiaCheapest$807Average$996FlexibilityNo cancel feeOn-timeN/A
Turkish AirlinesCheapest$816Average$940FlexibilityNo cancel feeOn-time77%
Etihad AirwaysCheapest$833Average$932FlexibilityNo cancel feeOn-time75%
Korean AirCheapest$944Average$1,199FlexibilityNo cancel feeOn-time81%
Qatar AirwaysCheapest$996Average$1,288FlexibilityNo cancel feeOn-time68%
JetBlueCheapest$1,024Average$1,159FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$1,191Average$1,430FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$1,196Average$1,223FlexibilityNo cancel feeOn-time71%

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