$445 Cheap Flights from Washington (IAD) to Singapore (SIN)

View $445 flight on Thu, Mar 5, 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 $445 for one-way flights and $849 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Etihad Airways
Thu, Apr 23 - Mon, Apr 27
IAD
Washington
SIN
Singapore
$849 Roundtrip, found 7 hours ago
$849
Roundtrip
found 7 hours ago
Select Etihad Airways flight, departing Thu, Apr 23 from Washington to Singapore, returning Mon, Apr 27, priced at $849 found 7 hours ago
Turkish Airlines
Thu, Mar 12 - Wed, Mar 18
IAD
Washington
SIN
Singapore
$971 Roundtrip, found 17 hours ago
$971
Roundtrip
found 17 hours ago
Select Turkish Airlines flight, departing Thu, Mar 12 from Washington to Singapore, returning Wed, Mar 18, priced at $971 found 17 hours ago
Air Canada
Tue, Sep 8 - Thu, Sep 17
IAD
Washington
SIN
Singapore
$989 Roundtrip, found 18 hours ago
$989
Roundtrip
found 18 hours ago
Select Air Canada flight, departing Tue, Sep 8 from Washington to Singapore, returning Thu, Sep 17, priced at $989 found 18 hours ago
EVA Airways
Tue, Aug 18 - Tue, Sep 15
IAD
Washington
SIN
Singapore
$1,050 Roundtrip, found 3 days ago
$1,050
Roundtrip
found 3 days ago
Select EVA Airways flight, departing Tue, Aug 18 from Washington to Singapore, returning Tue, Sep 15, priced at $1,050 found 3 days ago
STARLUX Airlines
Mon, Aug 24 - Tue, Oct 20
IAD
Washington
SIN
Singapore
$1,086 Roundtrip, found 3 days ago
$1,086
Roundtrip
found 3 days ago
Select STARLUX Airlines flight, departing Mon, Aug 24 from Washington to Singapore, returning Tue, Oct 20, priced at $1,086 found 3 days ago
Qatar Airways
Tue, Apr 7 - Tue, May 5
IAD
Washington
SIN
Singapore
$1,121 Roundtrip, found 1 hour ago
$1,121
Roundtrip
found 1 hour ago
Select Qatar Airways flight, departing Tue, Apr 7 from Washington to Singapore, returning Tue, May 5, priced at $1,121 found 1 hour ago
JetBlue Airways
Sun, May 3 - Tue, May 12
IAD
Washington
SIN
Singapore
$1,172 Roundtrip, found 2 days ago
$1,172
Roundtrip
found 2 days ago
Select JetBlue Airways flight, departing Sun, May 3 from Washington to Singapore, returning Tue, May 12, priced at $1,172 found 2 days ago
United
Wed, Dec 30 - Sun, Jan 10
IAD
Washington
SIN
Singapore
$1,176 Roundtrip, found 1 day ago
$1,176
Roundtrip
found 1 day ago
Select United flight, departing Wed, Dec 30 from Washington to Singapore, returning Sun, Jan 10, priced at $1,176 found 1 day ago
Korean Air
Thu, Sep 3 - Tue, Sep 15
IAD
Washington
SIN
Singapore
$1,179 Roundtrip, found 13 hours ago
$1,179
Roundtrip
found 13 hours ago
Select Korean Air flight, departing Thu, Sep 3 from Washington to Singapore, returning Tue, Sep 15, priced at $1,179 found 13 hours ago
Saudia
Sat, Apr 25 - Sat, May 2
IAD
Washington
SIN
Singapore
$1,182 Roundtrip, found 4 days ago
$1,182
Roundtrip
found 4 days ago
Select Saudia flight, departing Sat, Apr 25 from Washington to Singapore, returning Sat, May 2, priced at $1,182 found 4 days ago

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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 $1,227
SIN
Changi
Cheapest
Average driving time to city center18 min
Flights from $1,227

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.

Frequently asked questions

How much does a flight from Washington, DC (IAD-Washington Dulles Intl.) to Singapore (SIN-Changi) cost?
You can find cheap one-way flights from $445 and cheap return flights from $849 Washington, DC (IAD-Washington Dulles Intl.) to Singapore (SIN-Changi) with Expedia. One-way flights typically cost between $824 and $10008, and return flights often range between $1514 and $11776. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see the cheapest fares first, and use the Price Tracking tool to receive alerts when Washington, DC (IAD-Washington Dulles Intl.) to Singapore (SIN-Changi) ticket fares go up or down.*Typical price ranges based on flights available on Expedia in the last year. Prices include multi-airline options.
What is the cheapest month to fly from Washington, DC (IAD-Washington Dulles Intl.) to Singapore (SIN-Changi)?
April is the cheapest month to fly from Washington, DC (IAD) to Singapore (SIN), with average return fares around $1,121. This is about 19% lower than the average price throughout the year, as demand tends to be lower in spring. Other budget-friendly months include September and October.*Averages based on flights available on Expedia in the last year.
Which airlines fly direct from Washington, DC (IAD-Washington Dulles Intl.) to Singapore (SIN-Changi)?
Enter IAD to SIN and your travel dates, then apply the 'Nonstop' filter to see only direct flights.
What is the cheapest airline that flies from Washington, DC (IAD-Washington Dulles Intl.) to Singapore (SIN-Changi)?
China Airlines is one of the cheapest airlines offering connecting flights from Washington, DC (IAD) to Singapore (SIN) with a layover in New York (JFK), starting from around $1,687. Use Expedia's search tool to compare the prices and schedules of airlines that fly this route to find the best option for your plans and budget.*Prices based on flights available on Expedia in the last year.
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)?
For flights from Washington, DC (IAD) to Singapore (SIN), the best times to travel are in April and September. You can expect to pay around $1,121 for a return flight in these months. April is great for enjoying Singapore's warm weather before the summer heat, while September offers a quieter travel experience as the summer crowds dissipate.*Prices based on flights available on Expedia in the last year.
What is the earliest flight from Washington, DC (IAD-Washington Dulles Intl.) to Singapore (SIN-Changi)?
The earliest flight from Washington, DC (IAD-Washington Dulles Intl.) to Singapore (SIN-Changi) typically departs at around 6:00 AM, operated by Alaska Airlines. This seasonal service is available in June, providing an excellent opportunity for early travelers to enjoy their time in Singapore. An early departure allows you to maximize your time at your destination. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
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 late evening, from 9pm to midnight. This timing is popular because it allows travelers to maximize their day in Washington before heading to Singapore. About 22% of passengers prefer this time, with Turkish Airlines, United Airlines, and British Airways offering flights during this window.
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)?
Business class seats are offered on the IAD to SIN route. Airlines that offer business class service on this route include:

  • British Airways
  • Lufthansa
  • United Airlines
  • Aer Lingus
  • Emirates
  • Swiss International Air Lines
  • Air Canada
  • Qatar Airways
  • Korean Air
  • Turkish Airlines

First class cabins are available on:

  • Emirates
  • Swiss International Air Lines
  • Lufthansa
  • British Airways
  • United Airlines
  • Delta Air Lines
  • Air France

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)?
From Washington Dulles Intl. (IAD), you can fly into Changi (SIN) to reach Singapore. Some flights may connect through major hubs like O'Hare Intl. (ORD), Dubai Intl. (DXB), Pierre Elliott Trudeau Intl. (YUL) 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) Singapore Vacation Packages 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 France, Alaska Airlines, All Nippon Airways, American Airlines, British Airways, Delta, Emirates, Etihad Airways, JetBlue Airways, KLM, Korean Air, Lufthansa, Malaysia Airlines, Qatar Airways, STARLUX Airlines, SriLankan Airlines, Swiss International Air Lines, Turkish Airlines, United
Roundtrip price
$849
Distance
9649 mi

Book with confidence

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 April. 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 $445 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.

 

Washington to Singapore Flights

*Flight schedules are subject to change.

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*Available to One Key members.