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

According to our current data, Korean Air ($998), Singapore Airlines ($1,058), and IndiGo ($1,059) offers the cheapest pricing from Washington, D.C. to Singapore. Users have found that Korean Air is 18% 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 IndiGo ($423), Air India ($426), and Turkish Airlines ($469).

In terms of precipitation, rainfall in Singapore ranges from 5.9 - 10.6 inches per month. December is typically the wettest month, when rainfall can reach 10.6 in. July is typically the driest time to visit Singapore when rainfall is around 5.9 in.

If weather is an important factor for your trip to Singapore, use this chart to help with planning. For those seeking warmer temperatures, March is the ideal time of year to visit, when temperatures reach an average of 82.4 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 78.8 F).

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.

What are the most popular airlines that fly from Washington, D.C. to Singapore?

When booking a flight from Washington, D.C. to Singapore, you may want to consider flying on American Airlines, Air Canada or Air India as they are the most popular for this route.

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.

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.

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

Istanbul travelers tend to visit Taksim Square, Sultan Ahmet Camii, and Beyazit Meydani more than anywhere else. Taksim Square, Sultan Ahmet Camii, and Beyazit Meydani can be accessed by traveling approximately 20.8 mi, 22.3 mi, and 21.7 mi, respectively from Istanbul. Travelers in need of a car in Istanbul can rent one for about $45 per day.

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

Users have found that flying from Washington, D.C. to Singapore on a Friday typically leans towards higher prices. However, this doesn’t mean you still can’t find a deal. Flexibility with other aspects of your flight can still land a great price for your trip.

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

To save on the cost of your flight from Washington, D.C. to Singapore, book at least 61 days before your planned departure. Booking around this time can save you about 16% on the cost of this flight compared to booking a flight leaving this week. We have found prices from $957 if you need a flight within two weeks. For flights within the next 72 hours, you can find tickets from as low as $957.

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

October can be a great time to fly to Singapore from Washington, D.C. with a flight ticket averaging about $1,229. Cheapflights users have found deals in the month of October for as cheap as $671. The most expensive prices can be found in the month of December.

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. 11 airlines have flights to Singapore Changi from Washington, D.C. on a regular basis.

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.

$423+ Flights from Washington, D.C. to Singapore

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Find cheap flights from Washington, D.C. to Singapore with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

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Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheapflights Tip: The best prices from Washington, D.C. to Singapore Changi are usually found in October or November, booked 60 days in advance, depart on a Wednesday or Monday and return on a Tuesday

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

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 Changi

Search Deals

One-way flight from Washington, D.C. (WAS) to Singapore Changi

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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.

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

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

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

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

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

Fri 9/51:30 pmIAD - SIN

2 stops39h 50mIndiGo

Wed 9/107:45 pmSIN - IAD

2 stops36h 00mIndiGo

Deal found 7/1

$1,059

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

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

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

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

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

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

Best flights from Washington, D.C. to Singapore
Discover carefully curated flight deals from Washington, D.C. to Singapore that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 3, 2025.

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

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

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

Fri 9/51:30 pmIAD - SIN

2 stops39h 50mIndiGo

Wed 9/107:45 pmSIN - IAD

2 stops36h 00mIndiGo

Deal found 7/1

$1,059

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

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

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

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

Tue 9/166:00 amBWI - SIN

2 stops30h 20mJapan Airlines

Mon 9/291:55 amSIN - BWI

2 stops27h 55mJapan Airlines

Deal found 7/1

$1,200

Sat 8/96:00 amBWI - SIN

2 stops35h 00mDelta

Wed 8/271:10 amSIN - BWI

2 stops34h 07mDelta

Deal found 7/2

$1,205

Wed 7/237:25 amDCA - SIN

2 stops34h 50mUnited Airlines

Tue 7/298:45 amSIN - DCA

1 stop24h 42mUnited Airlines

Deal found 7/1

$1,225

Thu 10/23:30 pmDCA - SIN

2 stops27h 10mANA

Sun 10/510:10 pmSIN - DCA

2 stops34h 53mANA

Deal found 7/1

$1,226

Last-minute flights from Washington, D.C. to Singapore
Discover last-minute flight deals from Washington, D.C. to Singapore. Data last updated July 3, 2025 and is based on user searches.

Wed 7/26:00 amBWI - SIN

2 stops29h 40mDelta

Wed 7/910:30 pmSIN - BWI

2 stops34h 18mDelta

Deal found 6/30

$1,205

Tue 7/86:32 amIAD - SIN

1 stop23h 53mUnited Airlines

Tue 8/128:40 pmSIN - IAD

1 stop23h 52mUnited Airlines

Deal found 7/2

$1,525

Wed 7/96:42 amBWI - SIN

1 stop23h 43mUnited Airlines

Mon 8/118:45 amSIN - BWI

1 stop32h 43mUnited Airlines

Deal found 7/2

$1,525

Thu 7/1011:00 amIAD - SIN

1 stop22h 00mQatar Airways

Mon 7/143:10 amSIN - IAD

1 stop24h 30mQatar Airways

Deal found 7/3

$1,154

Thu 7/1011:00 amIAD - SIN

1 stop22h 00mMultiple Airlines

Tue 7/157:45 pmSIN - IAD

2 stops36h 00mMultiple Airlines

Deal found 7/3

$1,179

Thu 7/101:30 pmIAD - SIN

2 stops39h 50mIndiGo

Tue 7/157:45 pmSIN - IAD

2 stops36h 00mIndiGo

Deal found 7/3

$1,195

Thu 7/109:29 amDCA - SIN

2 stops26h 51mJapan Airlines

Tue 7/158:05 amSIN - DCA

2 stops24h 39mJapan Airlines

Deal found 7/3

$1,381

Thu 7/106:30 amIAD - SIN

2 stops29h 50mAlaska Airlines

Mon 7/141:55 amSIN - IAD

2 stops41h 32mAlaska Airlines

Deal found 7/3

$1,476

Thu 7/107:00 amDCA - SIN

1 stop23h 25mUnited Airlines

Tue 7/158:45 amSIN - DCA

1 stop24h 42mUnited Airlines

Deal found 7/3

$1,525

Thu 7/107:50 amDCA - SIN

2 stops27h 50mKorean Air

Tue 8/121:10 amSIN - DCA

2 stops32h 50mKorean Air

Deal found 7/2

$1,532

Sat 7/126:00 amDCA - SIN

3 stops35h 25mMultiple Airlines

Sun 7/209:10 amSIN - DCA

2 stops38h 53mMultiple Airlines

Deal found 6/30

$1,379

Sat 7/1211:00 amIAD - SIN

1 stop22h 00mJetBlue

Fri 7/183:10 amSIN - IAD

1 stop24h 30mJetBlue

Deal found 7/2

$1,444

One-way flights from Washington, D.C. to Singapore
Search for one-way flight options from Washington, D.C. to Singapore. Find affordable one-way fares based on user searches. Data last updated July 3, 2025.

Thu 8/211:30 pmIAD - SIN

2 stops39h 50mIndiGo

Deal found 7/1

$423

Wed 10/811:00 amIAD - SIN

1 stop22h 45mAir India

Deal found 7/1

$426

Mon 7/216:22 pmBWI - SIN

2 stops41h 18mMultiple Airlines

Deal found 7/1

$450

Thu 8/211:30 pmIAD - SIN

1 stop40h 25mTurkish Airlines

Deal found 7/1

$469

Sat 8/1610:05 pmIAD - SIN

2 stops31h 15mMultiple Airlines

Deal found 7/1

$476

Sat 8/166:00 pmDCA - SIN

2 stops37h 10mMultiple Airlines

Deal found 7/1

$493

Tue 7/226:00 amIAD - SIN

2 stops29h 40mKorean Air

Deal found 7/1

$510

Thu 8/218:59 amDCA - SIN

2 stops26h 41mKorean Air

Deal found 7/1

$532

Wed 9/106:55 pmBWI - SIN

1 stop24h 55mSingapore Airlines

Deal found 7/1

$629

Thu 8/216:30 amDCA - SIN

2 stops24h 35mCathay Pacific

Deal found 7/1

$631

Tue 8/126:58 pmDCA - SIN

2 stops41h 37mChina Airlines

Deal found 7/2

$650

Wed 9/108:59 amDCA - SIN

1 stop32h 16mSingapore Airlines

Deal found 7/1

$689

Cheapflights Fare Finder

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

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

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?

To ensure you get the cheapest price possible for a flight from Washington, D.C. to Singapore, you should look to book at least 60 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 $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 SIN?

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?

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?

Reviews of airlines servicing Singapore

Get a feel of what it's like to fly with Korean Air, ANA, and Japan 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

1,101 reviews

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

Reviews

1 / 20

10.0

Excellent

Chris,Mar 2025

SEA - ICN

ANA

8.4

Very good

893 reviews

Korean Air

8.4

Very good

1,101 reviews

Reviews

1 / 20

10.0

Excellent

Chris,Mar 2025

SEA - ICN

Japan Airlines

8.3

Very good

1,505 reviews

Korean Air

8.4

Very good

1,101 reviews

Reviews

1 / 20

10.0

Excellent

Chris,Mar 2025

SEA - ICN

China Airlines

8.3

Very good

744 reviews

Korean Air

8.4

Very good

1,101 reviews

Reviews

1 / 20

10.0

Excellent

Chris,Mar 2025

SEA - ICN

Singapore Airlines

8.1

Very good

1,320 reviews

Korean Air

8.4

Very good

1,101 reviews

Reviews

1 / 20

10.0

Excellent

Chris,Mar 2025

SEA - ICN

Related info for your journey

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. 11 airlines have flights to Singapore Changi from Washington, D.C. on a regular basis.
What are the cheapest airlines flying from Washington, D.C. to Singapore round-trip?
According to our current data, Korean Air ($998), Singapore Airlines ($1,058), and IndiGo ($1,059) offers the cheapest pricing from Washington, D.C. to Singapore. Users have found that Korean Air is 18% 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 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.
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, Sultan Ahmet Camii, and Beyazit Meydani more than anywhere else. Taksim Square, Sultan Ahmet Camii, and Beyazit Meydani can be accessed by traveling approximately 20.8 mi, 22.3 mi, and 21.7 mi, respectively from Istanbul. Travelers in need of a car in Istanbul can rent one for about $45 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 $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

Browse thousands of different options on Cheapflights for your next trip

Alternative routes for Washington, D.C. to Singapore

Dulles Intl to Singapore flights

Reagan-National to Singapore flights

Other flights to Singapore

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

Airline	Cheapest	Average	Flexibility	On-time
Air India	Cheapest$807	Average$1,210	FlexibilityNo cancel fee	On-timeN/A
Turkish Airlines	Cheapest$824	Average$971	FlexibilityNo cancel fee	On-time77%
Etihad Airways	Cheapest$884	Average$994	FlexibilityNo cancel fee	On-time75%
United Airlines	Cheapest$904	Average$1,368	FlexibilityNo cancel fee	On-time69%
Air Canada	Cheapest$938	Average$1,526	FlexibilityNo cancel fee	On-time67%
Korean Air	Cheapest$991	Average$1,265	FlexibilityNo cancel fee	On-time81%
Qatar Airways	Cheapest$1,006	Average$1,240	FlexibilityNo cancel fee	On-time68%
JetBlue	Cheapest$1,024	Average$1,139	FlexibilityNo cancel fee	On-time62%
Alaska Airlines	Cheapest$1,066	Average$1,128	FlexibilityNo cancel fee	On-time75%
Singapore Airlines	Cheapest$1,097	Average$1,757	FlexibilityNo cancel fee	On-time81%

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$423+ 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 8/21. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Washington, D.C. to Singapore with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheapflights Tip: The best prices from Washington, D.C. to Singapore Changi are usually found in October or November, booked 60 days in advance, depart on a Wednesday or Monday and return on a Tuesday

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

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One-way from

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

Cheapest flights from Washington, D.C. to SingaporeExplore 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.

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.

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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.

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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 June 27, 2025.

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

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 July 3, 2025.

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.

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

Reviews of airlines servicing Singapore

Get a feel of what it's like to fly with Korean Air, ANA, and Japan 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.

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.?

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

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

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?

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?

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

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

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

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Washington, D.C. to Singapore

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

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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.