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$423+ 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 8/21. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — SIN
Jul 8 — Jul 151
Tue 7/8
Tue 7/15
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 July 3, 2025.

Round-trip from

$850
(CheapTickets)

One-way from

$423
(Booking.com)

Popular in

December

Cheapest in

October

Average price

$1,580
From Washington, D.C. (WAS) to Singapore
Search Deals
One-way flight from Washington, D.C. (WAS) to Singapore
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Highest demand for flights based on searches. 5% potential increase in price ($73 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($52 potential savings vs. average RT price).
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Average for round-trip flights in July 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 July 3, 2025.

This CheapTickets deal was found by Cheapflights users on 7/3. 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 CheapTickets is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/175:45 amBWI - SIN
2 stops51h 45mMultiple Airlines
Sun 8/2410:50 pmSIN - BWI
2 stops44h 04mMultiple Airlines
Deal found 7/3$850
This oojo deal was found by Cheapflights users on 7/3. 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 8/271:30 pmIAD - SIN
1 stop22h 10mKorean Air
Sun 9/71:10 amSIN - IAD
1 stop21h 45mKorean Air
Deal found 7/3$998
This FlightHub deal was found by Cheapflights users on 7/3. 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.
Thu 9/188:25 amDCA - SIN
2 stops32h 35mKorean Air
Mon 9/297:30 amSIN - DCA
2 stops43h 33mKorean Air
Deal found 7/3$1,011
This Etihad Airways deal was found by Cheapflights users on 7/3. 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 Etihad Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/2210:05 pmIAD - SIN
2 stops25h 25mMultiple Airlines
Sun 9/79:10 pmSIN - IAD
1 stop31h 00mMultiple Airlines
Deal found 7/3$1,041
This Justfly.com deal was found by Cheapflights users on 7/2. 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.
Mon 9/18:59 amDCA - SIN
2 stops27h 56mSingapore Airlines
Wed 9/108:45 pmSIN - DCA
1 stop36h 14mSingapore Airlines
Deal found 7/2$1,058
This Booking.com deal was found by Cheapflights users on 7/1. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/51:30 pmIAD - SIN
2 stops39h 50mIndiGo
Wed 9/107:45 pmSIN - IAD
2 stops36h 00mIndiGo
Deal found 7/1$1,059
This Air Canada deal was found by Cheapflights users on 7/1. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/169:40 amDCA - SIN
2 stops33h 25mAir Canada
Tue 9/309:10 amSIN - DCA
2 stops35h 49mAir Canada
Deal found 7/1$1,060
This Air Canada deal was found by Cheapflights users on 7/1. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/169:35 amIAD - SIN
2 stops33h 30mAir Canada
Tue 9/309:10 amSIN - IAD
2 stops36h 28mAir Canada
Deal found 7/1$1,060
This oojo deal was found by Cheapflights users on 7/3. 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 9/179:00 pmIAD - SIN
2 stops30h 35mQatar Airways
Tue 9/303:10 amSIN - IAD
1 stop24h 30mQatar Airways
Deal found 7/3$1,069
This KAYAK deal was found by Cheapflights users on 7/2. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/312:50 pmIAD - SIN
1 stop42h 40mAir India
Tue 8/268:45 amSIN - IAD
2 stops38h 30mAir India
Deal found 7/2$1,081
This FlightHub deal was found by Cheapflights users on 7/2. 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.
Wed 11/269:10 pmIAD - SIN
1 stop31h 25mTurkish Airlines
Sat 12/611:25 pmSIN - IAD
1 stop25h 20mTurkish Airlines
Deal found 7/2$1,099
This FlightHub deal was found by Cheapflights users on 7/2. 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.
Wed 9/176:55 pmBWI - SIN
1 stop24h 55mSingapore Airlines
Tue 9/309:25 amSIN - BWI
2 stops33h 48mSingapore Airlines
Deal found 7/2$1,128

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 July 3, 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

Sun 8/17

5:45 am-9:30 pm

2 stops51h 45m

Singapore Changi

Sun 8/24

10:50 pm-6:54 am

2 stops44h 04m

$850

Washington, D.C.Singapore

IAD - SIN

IADSIN

Washington, D.C. Dulles Intl

Wed 8/27

1:30 pm-11:40 pm

1 stop22h 10m

Singapore Changi

Sun 9/7

1:10 am-10:55 am

1 stop21h 45m

$998

Washington, D.C.Singapore

DCA - SIN

DCASIN

Washington, D.C. Reagan-National

Thu 9/18

8:25 am-5:00 am

2 stops32h 35m

Singapore Changi

Mon 9/29

7:30 am-3:03 pm

2 stops43h 33m

$1,011

Washington, D.C.Singapore

IAD - SIN

IADSIN

Washington, D.C. Dulles Intl

Fri 8/22

10:05 pm-11:30 am

2 stops25h 25m

Singapore Changi

Sun 9/7

9:10 pm-4:10 pm

1 stop31h 00m

$1,041

Washington, D.C.Singapore

DCA - SIN

DCASIN

Washington, D.C. Reagan-National

Mon 9/1

8:59 am-12:55 am

2 stops27h 56m

Singapore Changi

Wed 9/10

8:45 pm-8:59 pm

1 stop36h 14m

$1,058

Washington, D.C.Singapore

IAD - SIN

IADSIN

Washington, D.C. Dulles Intl

Fri 9/5

1:30 pm-5:20 pm

2 stops39h 50m

Singapore Changi

Wed 9/10

7:45 pm-7:45 pm

2 stops36h 00m

$1,059

Washington, D.C.Singapore

DCA - SIN

DCASIN

Washington, D.C. Reagan-National

Tue 9/16

9:40 am-7:05 am

2 stops33h 25m

Singapore Changi

Tue 9/30

9:10 am-8:59 am

2 stops35h 49m

$1,060

Washington, D.C.Singapore

IAD - SIN

IADSIN

Washington, D.C. Dulles Intl

Tue 9/16

9:35 am-7:05 am

2 stops33h 30m

Singapore Changi

Tue 9/30

9:10 am-9:38 am

2 stops36h 28m

$1,060

Washington, D.C.Singapore

IAD - SIN

IADSIN

Washington, D.C. Dulles Intl

Wed 9/17

9:00 pm-3:35 pm

2 stops30h 35m

Singapore Changi

Tue 9/30

3:10 am-3:40 pm

1 stop24h 30m

$1,069

Washington, D.C.Singapore

IAD - SIN

IADSIN

Washington, D.C. Dulles Intl

Sun 8/3

12:50 pm-7:30 pm

1 stop42h 40m

Singapore Changi

Tue 8/26

8:45 am-11:15 am

2 stops38h 30m

$1,081

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/1

Showing 1-10 of 38 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 $1,008). Flying from Washington, D.C. to Singapore in December is currently the most expensive (average of $1,674). 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 July 3, 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 July 3, 2025.
Read reviews from past customers who have flown Korean Air, ANA, and Japan 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
1,101 reviews

Entertainment

8.2

Overall

8.4

Comfort

8.3

Crew

8.7

Boarding

8.5

Food

8.1

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
1,101 reviews
Korean Air
8.4
Very good
1,101 reviews

Entertainment

8.2

Overall

8.4

Comfort

8.3

Crew

8.7

Boarding

8.5

Food

8.1

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.
ANA
8.4
Very good
893 reviews
Korean Air
8.4
Very good
1,101 reviews

Entertainment

8.2

Overall

8.4

Comfort

8.3

Crew

8.7

Boarding

8.5

Food

8.1

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.
Japan Airlines
8.3
Very good
1,503 reviews
Korean Air
8.4
Very good
1,101 reviews

Entertainment

8.2

Overall

8.4

Comfort

8.3

Crew

8.7

Boarding

8.5

Food

8.1

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.
China Airlines
8.3
Very good
747 reviews
Korean Air
8.4
Very good
1,101 reviews

Entertainment

8.2

Overall

8.4

Comfort

8.3

Crew

8.7

Boarding

8.5

Food

8.1

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.
Singapore Airlines
8.1
Very good
1,320 reviews
Korean Air
8.4
Very good
1,101 reviews

Entertainment

8.2

Overall

8.4

Comfort

8.3

Crew

8.7

Boarding

8.5

Food

8.1

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 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 IndiGo ($423), Air India ($426), and Turkish Airlines ($469).

  • 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 $1,008). Flying from Washington, D.C. to Singapore in December is currently the most expensive (average of $1,674). 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 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 July 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
Air IndiaCheapest$807Average$1,210FlexibilityNo cancel feeOn-timeN/A
Turkish AirlinesCheapest$824Average$971FlexibilityNo cancel feeOn-time77%
Etihad AirwaysCheapest$884Average$994FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$904Average$1,368FlexibilityNo cancel feeOn-time69%
Air CanadaCheapest$938Average$1,526FlexibilityNo cancel feeOn-time67%
Korean AirCheapest$991Average$1,265FlexibilityNo cancel feeOn-time81%
Qatar AirwaysCheapest$1,006Average$1,240FlexibilityNo cancel feeOn-time68%
JetBlueCheapest$1,024Average$1,139FlexibilityNo cancel feeOn-time62%
Alaska AirlinesCheapest$1,066Average$1,128FlexibilityNo cancel feeOn-time75%
Singapore AirlinesCheapest$1,097Average$1,757FlexibilityNo cancel feeOn-time81%

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