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Cheap flights from Washington, D.C. to Singapore from $498

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Washington, D.C. to Singapore departing on 1/23. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Washington, D.C. to Singapore

Cheap round-trip flights

Enter your travel dates to find the best prices.
Singapore Airlines Logo
6:46 pm - 5:45 pmBWI-SIN
33h 59m1 stop
Singapore Airlines Logo
8:45 pm - 6:34 amSIN-BWI
22h 49m1 stop
$1,007Singapore Airlines
Find Deal
Wed, Feb 18 - Sun, Feb 22
Japan Airlines Logo
6:31 am - 12:50 amBWI-SIN
29h 19m2 stops
Japan Airlines Logo
2:20 am - 5:55 pmSIN-BWI
28h 35m2 stops
$1,123Japan Airlines
Find Deal
Wed, Feb 18 - Tue, Feb 24
Japan Airlines Logo
6:31 am - 12:50 amBWI-SIN
29h 19m2 stops
Japan Airlines Logo
8:15 am - 11:58 pmSIN-BWI
28h 43m2 stops
$1,126Japan Airlines
Find Deal
Wed, Feb 18 - Wed, Feb 25
Multiple Airlines Logo
9:15 pm - 10:15 amIAD-SIN
48h 00m2 stops
Multiple Airlines Logo
2:30 am - 8:26 pmSIN-IAD
30h 56m2 stops
$1,140Multiple Airlines
Find Deal
Mon, Jan 19 - Mon, Jan 26
SAUDIA Logo
6:10 pm - 9:55 pmIAD-SIN
62h 45m2 stops
SAUDIA Logo
9:35 am - 2:45 pmSIN-IAD
66h 10m2 stops
$1,141SAUDIA
Find Deal
Sun, Feb 1 - Tue, Feb 10
Multiple Airlines Logo
2:35 pm - 10:30 amIAD-SIN
30h 55m3 stops
Multiple Airlines Logo
2:20 pm - 9:05 amSIN-IAD
31h 45m3 stops
$1,142Multiple Airlines
Find Deal
Sun, Jan 18 - Mon, Jan 26
Qatar Airways Logo
8:05 pm - 2:55 pmIAD-SIN
29h 50m1 stop
Qatar Airways Logo
3:15 am - 8:20 amSIN-IAD
42h 05m1 stop
$1,147Qatar Airways
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Mon, Jan 12 - Mon, Jan 19
United Airlines Logo
5:59 pm - 8:00 amDCA-SIN
25h 01m1 stop
United Airlines Logo
10:10 am - 9:52 pmSIN-DCA
24h 42m1 stop
$1,164United Airlines
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Sun, Jan 11 - Mon, Jan 26
United Airlines Logo
5:59 pm - 8:00 amDCA-SIN
25h 01m1 stop
United Airlines Logo
10:20 pm - 11:35 amSIN-DCA
26h 15m2 stops
$1,174United Airlines
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Fri, Jan 9 - Mon, Feb 16
Air Canada Logo
9:40 am - 7:00 amDCA-SIN
33h 20m2 stops
Air Canada Logo
9:10 am - 7:59 pmSIN-DCA
22h 49m2 stops
$1,176Air Canada
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Thu, Mar 26 - Thu, Apr 2

Singapore Airlines flights from Washington, D.C. to Singapore

Our best Singapore Airlines deals on Washington, D.C. to Singapore flight tickets
Singapore Airlines
Feb 18
BWI6:46 pmBaltimore/Washington
33h 59m
1 stop
SIN5:45 pmSingapore Changi
Feb 22
SIN8:45 pmSingapore Changi
22h 49m
1 stop
BWI6:34 amBaltimore/Washington
$1,007
Find similar
Singapore Airlines
Feb 18
BWI6:00 amBaltimore/Washington
34h 30m
1 stop
SIN5:30 amSingapore Changi
Feb 24
SIN8:45 pmSingapore Changi
33h 08m
1 stop
BWI4:53 pmBaltimore/Washington
$1,155
Find similar
Singapore Airlines
Feb 18
BWI6:00 amBaltimore/Washington
34h 30m
1 stop
SIN5:30 amSingapore Changi
Feb 24
SIN9:20 amSingapore Changi
44h 33m
2 stops
BWI4:53 pmBaltimore/Washington
$1,167
Find similar

Japan Airlines flights from Washington, D.C. to Singapore

Our best Japan Airlines deals on Washington, D.C. to Singapore flight tickets
Japan Airlines
Feb 18
BWI6:31 amBaltimore/Washington
29h 19m
2 stops
SIN12:50 amSingapore Changi
Feb 24
SIN2:20 amSingapore Changi
28h 35m
2 stops
BWI5:55 pmBaltimore/Washington
$1,123
Find similar
Japan Airlines
Feb 18
BWI6:31 amBaltimore/Washington
29h 19m
2 stops
SIN12:50 amSingapore Changi
Feb 25
SIN8:15 amSingapore Changi
28h 43m
2 stops
BWI11:58 pmBaltimore/Washington
$1,126
Find similar
Japan Airlines
Jan 29
DCA6:59 amWashington, D.C. Reagan-National
34h 36m
2 stops
SIN6:35 amSingapore Changi
Feb 1
SIN2:20 amSingapore Changi
31h 24m
2 stops
DCA8:44 pmWashington, D.C. Reagan-National
$1,159
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momondo 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, momondo users made 832,500 searches. Data last updated November 20, 2025.
Use the filters below to find and compare flights from Washington, D.C. to Singapore that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

BaltimoreSingapore

BWI - SIN

BWISIN

Baltimore/Washington

Wed 2/18

6:46 pm-5:45 pm

1 stop33h 59m

Singapore Changi

Sun 2/22

8:45 pm-6:34 am

1 stop22h 49m

$1,007

BaltimoreSingapore

BWI - SIN

BWISIN

Baltimore/Washington

Wed 2/18

6:31 am-12:50 am

2 stops29h 19m

Singapore Changi

Tue 2/24

2:20 am-5:55 pm

2 stops28h 35m

$1,123

BaltimoreSingapore

BWI - SIN

BWISIN

Baltimore/Washington

Wed 2/18

6:31 am-12:50 am

2 stops29h 19m

Singapore Changi

Wed 2/25

8:15 am-11:58 pm

2 stops28h 43m

$1,126

Washington, D.C.Singapore

IAD - SIN

IADSIN

Washington, D.C. Dulles Intl

Mon 1/19

9:15 pm-10:15 am

2 stops48h 00m

Singapore Changi

Mon 1/26

2:30 am-8:26 pm

2 stops30h 56m

$1,140

Washington, D.C.Singapore

IAD - SIN

IADSIN

Washington, D.C. Dulles Intl

Sun 2/1

6:10 pm-9:55 pm

2 stops62h 45m

Singapore Changi

Tue 2/10

9:35 am-2:45 pm

2 stops66h 10m

$1,141

Washington, D.C.Singapore

IAD - SIN

IADSIN

Washington, D.C. Dulles Intl

Sun 1/18

2:35 pm-10:30 am

3 stops30h 55m

Singapore Changi

Mon 1/26

2:20 pm-9:05 am

3 stops31h 45m

$1,142

Washington, D.C.Singapore

IAD - SIN

IADSIN

Washington, D.C. Dulles Intl

Mon 1/12

8:05 pm-2:55 pm

1 stop29h 50m

Singapore Changi

Mon 1/19

3:15 am-8:20 am

1 stop42h 05m

$1,147

Washington, D.C.Singapore

DCA - SIN

DCASIN

Washington, D.C. Reagan-National

Sun 1/11

5:59 pm-8:00 am

1 stop25h 01m

Singapore Changi

Mon 1/26

10:10 am-9:52 pm

1 stop24h 42m

$1,164

Washington, D.C.Singapore

DCA - SIN

DCASIN

Washington, D.C. Reagan-National

Fri 1/9

5:59 pm-8:00 am

1 stop25h 01m

Singapore Changi

Mon 2/16

10:20 pm-11:35 am

2 stops26h 15m

$1,174

Washington, D.C.Singapore

DCA - SIN

DCASIN

Washington, D.C. Reagan-National

Thu 3/26

9:40 am-7:00 am

2 stops33h 20m

Singapore Changi

Thu 4/2

9:10 am-7:59 pm

2 stops22h 49m

$1,176

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Singapore from

How to get the cheapest flight ticket from Washington, D.C. to Singapore

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Singapore?

The month of August is, on average, the cheapest month to fly to Singapore from Washington, D.C., with most prices found around $732. If you aren’t able to travel to Singapore during the month of August, then flying in October is also cheap. Prices for this month can be found on momondo for an average of $945.

What is the cheapest day to depart on your flight to Singapore?

The cheapest day to depart from Washington, D.C. to Singapore is on a Wednesday when prices can be found for as low as $1,184. The most expensive day to fly to Singapore is Saturday, with ticket prices averaging around $1,370.

What is the cheapest time of day to depart on your flight to Singapore?

At noon is the cheapest time of day to fly from Washington, D.C. to Singapore when you can find flight prices for as low as $1,137. Flying to Singapore at noon is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying in the afternoon when prices are $1,511 on average. Flights to Singapore from Washington, D.C. in the afternoon are generally more expensive because this time of day is more convenient for travelers’ schedules.

How far in advance should I book a flight to Singapore?

You are more likely to see cheaper flights to Singapore from Washington, D.C. when booking weeks ahead of your departure date. In general, you can expect to find flights to Singapore for around $1,210 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Singapore from Washington, D.C. for as low as $1,136 on momondo.

How have Washington, D.C. to Singapore flight prices changed over time?

As of November 2025, prices for Washington, D.C. to Singapore flights are approximately 7% cheaper when compared to flights at the same time last year.

When to book flights from Washington, D.C. to Singapore

Are you open to changing your travel dates? Check out the ideal times to fly from Washington, D.C. to Singapore according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Washington, D.C. to Singapore (WAS to SIN) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Washington, D.C. to Singapore

Direct flights

None
There are no direct flights from Washington, D.C. to Singapore. There are no popular flight routes from Washington, D.C. to Singapore.
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  • How far is Washington, D.C. to Singapore Changi by plane?

    The straight-line distance from Washington, D.C. to Singapore Changi is 9651.2 mi. A reasonable flight in good conditions will take 21h 35m.

  • When did momondo last update prices for flights from Washington, D.C. to Singapore Changi Airport?

    Prices for flights from Washington, D.C. to Singapore Changi Airport were last updated today.

  • How many operators does momondo search for flights from Washington, D.C. to Singapore Changi Airport?

  • How old do you have to be to fly from Washington, D.C. to Singapore Changi Airport?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Washington, D.C. to Singapore Changi Airport.

  • What documentation or ID do you need to fly to Singapore Changi Airport?

    The travel and health documents you'll need for your trip to Singapore Changi Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Singapore Changi Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular airline from Washington, D.C. to Singapore?

Best airlines flying from Washington, D.C. to Singapore

Compare and see reviews for airlines that fly from Washington, D.C. to Singapore with momondo
Airline
Rating
Free Cancellation
Price
Air IndiaPriceFrom $807Free CancellationRating
5.5
2,943 reviews
Search Air India flights
Etihad AirwaysPriceFrom $833Free CancellationRating
7.4
1,309 reviews
Search Etihad Airways flights
Turkish AirlinesPriceFrom $839Free CancellationRating
7.3
4,044 reviews
Search Turkish Airlines flights
Korean AirPriceFrom $944Free CancellationRating
8.4
1,170 reviews
Search Korean Air flights
Qatar AirwaysPriceFrom $996Free CancellationRating
7.4
3,664 reviews
Search Qatar Airways flights
JetBluePriceFrom $1,043Free CancellationRating
7.2
2,902 reviews
Search JetBlue flights
United AirlinesPriceFrom $1,191Free CancellationRating
7.4
9,029 reviews
Search United Airlines flights
American AirlinesPriceFrom $1,196Free CancellationRating
7.2
11,047 reviews
Search American Airlines flights
ANAPriceFrom $1,499Free CancellationRating
8.4
1,009 reviews
Search ANA flights

Why use momondo?

Why should I use momondo to find a flight deal from Washington, D.C. to Singapore?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Washington, D.C. to Singapore. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from Washington, D.C. to Singapore with flexible booking policies on momondo?

All flight searches from Washington, D.C. to Singapore on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Washington, D.C. to Singapore?

Once you have performed a search for Washington, D.C. to Singapore flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from Washington, D.C. to Singapore right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of Washington, D.C. to Singapore flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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Airlines are sorted and displayed according to clicks in the past 7 days on momondo
Turkish Airlines
United Airlines
Qatar Airways
JetBlue
Etihad Airways
Korean Air
American Airlines
Air India
ANA