£392 Cheap Flights from Washington (IAD) to Singapore (SIN)

View £392 flight on Tue, 5 May 2026Opens in a new window

Popular airlines from Washington Dulles International Airport (IAD) to Changi Airport (SIN)

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

Prices were available within the past 7 days and start at £392 for one-way flights and £793 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Etihad Airways
Thu, 29 Oct - Wed, 4 Nov
IAD
Washington
SIN
Singapore
£793 Return, found 5 days ago
£793
Return
found 5 days ago
Select Etihad Airways flight, departing Thu, 29 Oct from Washington to Singapore, returning Wed, 4 Nov, priced at £793 found 5 days ago
Turkish Airlines
Thu, 29 Oct - Wed, 4 Nov
IAD
Washington
SIN
Singapore
£836 Return, found 5 days ago
£836
Return
found 5 days ago
Select Turkish Airlines flight, departing Thu, 29 Oct from Washington to Singapore, returning Wed, 4 Nov, priced at £836 found 5 days ago
Qatar Airways
Fri, 2 Oct - Thu, 22 Oct
IAD
Washington
SIN
Singapore
£892 Return, found 20 hours ago
£892
Return
found 20 hours ago
Select Qatar Airways flight, departing Fri, 2 Oct from Washington to Singapore, returning Thu, 22 Oct, priced at £892 found 20 hours ago
EVA Airways
Thu, 29 Oct - Wed, 4 Nov
IAD
Washington
SIN
Singapore
£1,013 Return, found 5 days ago
£1,013
Return
found 5 days ago
Select EVA Airways flight, departing Thu, 29 Oct from Washington to Singapore, returning Wed, 4 Nov, priced at £1,013 found 5 days ago
Emirates
Thu, 29 Oct - Wed, 4 Nov
IAD
Washington
SIN
Singapore
£1,047 Return, found 5 days ago
£1,047
Return
found 5 days ago
Select Emirates flight, departing Thu, 29 Oct from Washington to Singapore, returning Wed, 4 Nov, priced at £1,047 found 5 days ago
JetBlue Airways
Thu, 29 Oct - Wed, 4 Nov
IAD
Washington
SIN
Singapore
£1,051 Return, found 5 days ago
£1,051
Return
found 5 days ago
Select JetBlue Airways flight, departing Thu, 29 Oct from Washington to Singapore, returning Wed, 4 Nov, priced at £1,051 found 5 days ago
Alaska Airlines
Fri, 2 Oct - Thu, 22 Oct
IAD
Washington
SIN
Singapore
£1,074 Return, found 20 hours ago
£1,074
Return
found 20 hours ago
Select Alaska Airlines flight, departing Fri, 2 Oct from Washington to Singapore, returning Thu, 22 Oct, priced at £1,074 found 20 hours ago
Malaysia Airlines
Thu, 29 Oct - Wed, 4 Nov
IAD
Washington
SIN
Singapore
£1,210 Return, found 5 days ago
£1,210
Return
found 5 days ago
Select Malaysia Airlines flight, departing Thu, 29 Oct from Washington to Singapore, returning Wed, 4 Nov, priced at £1,210 found 5 days ago
British Airways
Thu, 29 Oct - Wed, 4 Nov
IAD
Washington
SIN
Singapore
£1,260 Return, found 5 days ago
£1,260
Return
found 5 days ago
Select British Airways flight, departing Thu, 29 Oct from Washington to Singapore, returning Wed, 4 Nov, priced at £1,260 found 5 days ago
Swiss International Air Lines
Mon, 1 Jun - Wed, 10 Jun
IAD
Washington
SIN
Singapore
£1,300 Return, found 1 day ago
£1,300
Return
found 1 day ago
Select Swiss International Air Lines flight, departing Mon, 1 Jun from Washington to Singapore, returning Wed, 10 Jun, priced at £1,300 found 1 day ago

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

April is typically the cheapest month to fly

From £643 - £1,079 per traveller.

Frequently asked questions

What is the cheapest month to fly from Washington, DC (IAD-Washington Dulles Intl.) to Singapore (SIN-Changi)?
April is typically the cheapest month to fly from Washington, DC (IAD-Washington Dulles Intl.) to Singapore (SIN-Changi), with average return fares of approximately £838. This is about 19% lower than the average price throughout the year. April often sees lower prices as it falls outside of peak holiday seasons, leading to reduced demand. September and October are also good months to find deals on this route.
How do I find cheap flights from Washington, DC (IAD-Washington Dulles Intl.) to Singapore (SIN-Changi)?
To find a cheap flight from Washington, DC (IAD-Washington Dulles Intl.) to Singapore (SIN-Changi), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best time to fly from Washington, DC (IAD-Washington Dulles Intl.) to Singapore (SIN-Changi)?
Based on booking data from the past year, the cheapest months to fly from Washington, DC (IAD-Washington Dulles Intl.) (IAD) to Singapore (SIN-Changi) (SIN) are typically April and September, with average return flight prices around £838. These months can be a good option if you're looking for more budget-friendly travel, though they might not always align with the most popular travel times.
How many flights per day from Washington, DC (IAD-Washington Dulles Intl.) to Singapore (SIN-Changi)?
There are approximately 75 connecting flights per day from Washington, DC (IAD-Washington Dulles Intl.) to Singapore (SIN-Changi). Some common connection points include Pearson Intl. (YYZ), Heathrow (LHR), and Seattle - Tacoma Intl. (SEA).
What is the earliest flight from Washington, DC (IAD-Washington Dulles Intl.) to Singapore (SIN-Changi)?
The earliest flight from Washington Dulles Intl. (IAD) to Changi (SIN) typically departs at approximately 1:50 AM local time, operated by BR. This is a seasonal service active in June. An early departure like this can help maximise your time at your destination. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What day of the week has the most flights from Washington, DC (IAD-Washington Dulles Intl.) to Singapore (SIN-Changi)?
You'll find the most flights from Washington Dulles Intl. (IAD) to Changi (SIN) on a Sunday, with around 72 flights available. This gives you plenty of options for your travel plans. Major airlines on this route include United Airlines, Qatar Airways, and Delta Air Lines. Sundays offer notably more flight options compared to other days of the week.
What are the most popular departure times for flights from Washington, DC (IAD-Washington Dulles Intl.) to Singapore (SIN-Changi)?
The most popular departure times for flights from Washington Dulles Intl. (IAD) to Changi (SIN) are in the morning, from 9am to 12pm. About 24% of passengers prefer this time. Many major carriers, including Qatar Airways, Emirates and Korean Air, offer flights during this window. This timing works well because it allows you to start your journey earlier in the day.
How long does it take to fly from Washington, DC (IAD-Washington Dulles Intl.) to Singapore (SIN-Changi)?
A flight from IAD to SIN with a layover takes around 23 hours 50 minutes, with the route covering approximately 9,651 miles. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from Washington, DC (IAD-Washington Dulles Intl.) to Singapore (SIN-Changi)?
Select the "Business class" and "First class" filters when looking for IAD to SIN flights on Expedia. This is the easiest way to compare prices, routes and flight times for your trip.
How do I earn miles on a Washington, DC (IAD-Washington Dulles Intl.) to Singapore (SIN-Changi) flight with Expedia?
It's easy to earn miles on a Washington, DC (IAD-Washington Dulles Intl.) to Singapore (SIN-Changi) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia. *Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for Singapore from Washington Dulles Intl. (IAD)?
If you're planning to travel to Singapore from Washington Dulles Intl. (IAD), you can fly directly into Changi (SIN) Some flights may connect through major hubs like O'Hare Intl. (ORD), Pierre Elliott Trudeau Intl. (YUL), Dubai Intl. (DXB) before reaching Singapore. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from Washington, DC (IAD-Washington Dulles Intl.) to Singapore (SIN-Changi) at the last minute?
Typically, booking a last minute flight from Washington, DC (IAD-Washington Dulles Intl.) to Singapore (SIN-Changi) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Washington, DC (IAD-Washington Dulles Intl.) to Singapore (SIN-Changi) flight and hotel package?
Securing a Washington, DC (IAD-Washington Dulles Intl.) to Singapore (SIN-Changi) flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities 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, DC (IAD-Washington Dulles Intl.) to Singapore (SIN-Changi)?
If you booked your Washington, DC (IAD-Washington Dulles Intl.) to Singapore (SIN-Changi) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
Washington Dulles Intl.
Destination airport
Changi
Airlines serving
Air Canada, Air China, Air France, Alaska Airlines, All Nippon Airways, American Airlines, British Airways, Delta, Emirates, Etihad Airways, Japan Airlines, JetBlue Airways, KLM, Korean Air, Lufthansa, Malaysia Airlines, Qatar Airways, Swiss International Air Lines, Turkish Airlines, United
Return price
£792
Distance
15439 km

Book with confidence

Compare flights from Washington to Singapore easily and book with confidence

For travelling on business or for pleasure, Expedia makes it easy to book your flights from Washington to Singapore. Operating between them flights per day, 20 airlines cover the route. And fly direct, getting you to Changi in just hours. If you have a preferred carrier, use our advanced search tool to find the right flight from Washington Dulles Intl. to Changi.  

To make things even better, in the advanced search, you can also choose to fly economy, premium economy, business or first class, select your maximum number of stops, and pick your preferred departure and arrival time. You can also opt for refundable and direct flights. 

Grab a great deal on your flight from Washington Dulles Intl. (IAD) to Changi (SIN)

The easiest way to view the best deals on flights from Washington to Singapore today is to enter your travel dates and hit search. From here, you can sort your results by price to see the cheapest flights first. Right now, return flights from Washington Dulles Intl. to Changi start at just £793 and range up to £1,300.  

To find an even better deal, try  

  • being flexible on your dates – midweek flights can be cheaper
  • looking for other airports near Washington and Singapore
  • booking your flight during October, the cheapest month on this route
  • varying your flight times – early morning and late at night are sometimes cheaper 

Why you should book your Washington to Singapore flight with Expedia!

We cater for all flight types, cabin classes and airlines. So whether you’re booking flights from Washington Dulles Intl. to Changi for a budget break or a business trip with a bit of pleasure thrown in, we make it easy to secure the seat that’s right for you.  

Thanks to our supersized inventory that offers great choice all in one place, you know you’ll get a great deal with Expedia. Especially if you bundle your flight together with your hotel, you will unlock amazing savings. For added peace of mind, you can choose flexible bookings or filter to find refundable options, so you won’t pay a fee to change your flight.  

Compare flights from Washington to Singapore easily and book with confidence

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*Available to Expedia members.