$444 Cheap Flights from Washington (IAD) to Singapore (SIN)

View $444 flight on Sun, Feb 15, 2026Opens in a new window

Popular airlines from Washington Dulles Intl. Airport (IAD) to Singapore Changi Airport (SIN)

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Cheap Flights from Washington to Singapore (IAD-SIN)

Prices were available within the past 7 days and start at $444 for one-way flights and $900 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Etihad Airways
Wed, Feb 11 - Fri, Feb 20
IAD
Washington
SIN
Singapore
$900 Roundtrip, just found
$900
Roundtrip
just found
Select Etihad Airways flight, departing Wed, Feb 11 from Washington to Singapore, returning Fri, Feb 20, priced at $900 just found
Turkish Airlines
Wed, Mar 4 - Tue, Mar 10
IAD
Washington
SIN
Singapore
$929 Roundtrip, found 5 days ago
$929
Roundtrip
found 5 days ago
Select Turkish Airlines flight, departing Wed, Mar 4 from Washington to Singapore, returning Tue, Mar 10, priced at $929 found 5 days ago
Saudia
Sat, Jan 10 - Tue, Feb 10
IAD
Washington
SIN
Singapore
$1,037 Roundtrip, found 1 day ago
$1,037
Roundtrip
found 1 day ago
Select Saudia flight, departing Sat, Jan 10 from Washington to Singapore, returning Tue, Feb 10, priced at $1,037 found 1 day ago
Air Canada
Thu, Apr 30 - Sun, May 10
IAD
Washington
SIN
Singapore
$1,110 Roundtrip, found 7 hours ago
$1,110
Roundtrip
found 7 hours ago
Select Air Canada flight, departing Thu, Apr 30 from Washington to Singapore, returning Sun, May 10, priced at $1,110 found 7 hours ago
United
Thu, Apr 30 - Sun, May 10
IAD
Washington
SIN
Singapore
$1,124 Roundtrip, found 7 hours ago
$1,124
Roundtrip
found 7 hours ago
Select United flight, departing Thu, Apr 30 from Washington to Singapore, returning Sun, May 10, priced at $1,124 found 7 hours ago
Korean Air
Wed, Sep 2 - Mon, Sep 14
IAD
Washington
SIN
Singapore
$1,127 Roundtrip, found 6 days ago
$1,127
Roundtrip
found 6 days ago
Select Korean Air flight, departing Wed, Sep 2 from Washington to Singapore, returning Mon, Sep 14, priced at $1,127 found 6 days ago
Delta
Thu, Mar 12 - Thu, Mar 19
IAD
Washington
SIN
Singapore
$1,138 Roundtrip, found 1 day ago
$1,138
Roundtrip
found 1 day ago
Select Delta flight, departing Thu, Mar 12 from Washington to Singapore, returning Thu, Mar 19, priced at $1,138 found 1 day ago
All Nippon Airways
Thu, Sep 17 - Wed, Sep 30
IAD
Washington
SIN
Singapore
$1,160 Roundtrip, found 6 days ago
$1,160
Roundtrip
found 6 days ago
Select All Nippon Airways flight, departing Thu, Sep 17 from Washington to Singapore, returning Wed, Sep 30, priced at $1,160 found 6 days ago
Qatar Airways
Wed, Feb 4 - Wed, Feb 18
IAD
Washington
SIN
Singapore
$1,163 Roundtrip, found 1 day ago
$1,163
Roundtrip
found 1 day ago
Select Qatar Airways flight, departing Wed, Feb 4 from Washington to Singapore, returning Wed, Feb 18, priced at $1,163 found 1 day ago
Japan Airlines
Wed, Mar 4 - Mon, Mar 9
IAD
Washington
SIN
Singapore
$1,165 Roundtrip, found 1 day ago
$1,165
Roundtrip
found 1 day ago
Select Japan Airlines flight, departing Wed, Mar 4 from Washington to Singapore, returning Mon, Mar 9, priced at $1,165 found 1 day ago

Find the cheapest month to fly from Washington (IAD) to Singapore (SIN)

September is typically the cheapest month to fly

From $814 - $1,159 per traveler.

Alternative airports near Singapore

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Changi SIN. Cheapest option available. Average driving time to city center is 18 minutes. Flights from $2,450
SIN
Changi
Cheapest
Average driving time to city center18 min
Flights from $2,450
Flights from Washington (IAD) to Singapore (SIN)
Origin airport
Washington Dulles Intl.
Destination airport
Changi
Airlines serving
Air Canada, Air France, Alaska Airlines, All Nippon Airways, American Airlines, British Airways, Emirates, Etihad Airways, Japan Airlines, JetBlue Airways, KLM, Korean Air, Lufthansa, Malaysia Airlines, Qatar Airways, STARLUX Airlines, SriLankan Airlines, Swiss International Air Lines, Turkish Airlines, United
Roundtrip price
$899
Distance
9649 mi

Washington to Singapore Flights

The cheapest times to fly from Washington to Singapore

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Washington to Singapore are during the month of February. You can find some of the cheapest flights from Washington to Singapore with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Washington to Singapore

Sunday is one of the best days to book for cheap flights from Washington to Singapore: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Washington to Singapore

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Washington to Singapore in 2026. You can also book with separate airlines for your outbound and return journeys, from $444 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Washington to Singapore flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Washington to Singapore airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Washington Dulles Intl. Airport (IAD) to Changi Airport (SIN) cost?
Get a cheap one-way flight from $444 or cheap return flight from $900 from Washington Dulles Intl. Airport (IAD) to Changi Airport (SIN) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight deals on this route.
What is the cheapest month to fly from Washington Dulles Intl. Airport (IAD) to Changi Airport (SIN)?
February is the most affordable month to fly from IAD to SIN. Planning your trip for the off-season is often the key to finding better deals on flights.
What is the cheapest airline that flies from Washington Dulles Intl. Airport (IAD) to Changi Airport (SIN)?
Expedia's filter tool lets you easily compare different airlines, flight durations and fares all in one place. Choose your preferences, then sort by "Price (lowest to highest)" to see which carrier offers the cheapest IAD to SIN flight.
How many flights per day from Washington Dulles Intl. Airport (IAD) to Changi Airport (SIN)?
There aren't any daily direct flights available from Washington Dulles Intl. Airport (IAD) to Changi Airport (SIN). But you can opt for flights with layovers. Filter your search results on Expedia to include one or more stops, and you'll be soaring above the clouds in no time.
What day of the week has the most flights from IAD to SIN?
Typically you'll find the greatest selection of flight options on a Friday. Tuesdays tend to be the quietest.* But this can vary depending on the time of year, airline and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Washington Dulles Intl. Airport (IAD) to Changi Airport (SIN)?
To reach Changi Airport (SIN) on schedule, select a flight that leaves from Washington Dulles Intl. Airport (IAD) before 3 PM. The likelihood of cancellations is 22% higher, on average, for departures after this hour.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Washington Dulles Intl. Airport (IAD) to Changi Airport (SIN) last-minute?
Waiting until just before your departure to book your flight from IAD to SIN generally means paying more. While you might find some last-minute offers, they aren't always guaranteed. Be flexible with your itinerary to maximize your chances of landing a bargain.
Is it cheaper to book an IAD to SIN flight and hotel package?
Opting for an IAD to SIN flight and hotel package tends to be cheaper than booking separately. With Expedia, you can enjoy the convenience of organizing your travels all in one place. Pick from our wide range of accommodations and then add activities, flights and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Washington Dulles Intl. Airport (IAD) to Changi Airport (SIN)?
If you booked your IAD to SIN flight in the last 24 hours, you may be able to modify or cancel it without fees. Depending on the airline and the type of fare you have, additional charges may apply for changes after that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, visit our Customer Service portal if you want more information.

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*Available to One Key members.