$461 Cheap Flights from Singapore (SIN) to Washington (IAD)

View $461 flight on Thu, Nov 6, 2025Opens in a new window

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

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Cheap Flights from Singapore to Washington (SIN-IAD)

Prices were available within the past 7 days and start at $461 for one-way flights and $668 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Air Canada
Thu, Jan 22 - Wed, Jan 28
SIN
Singapore
IAD
Washington
$668 Roundtrip, found 3 days ago
$668
Roundtrip
found 3 days ago
Select Air Canada flight, departing Thu, Jan 22 from Singapore to Washington, returning Wed, Jan 28, priced at $668 found 3 days ago
Air China
Mon, Sep 15 - Fri, Oct 3
SIN
Singapore
IAD
Washington
$822 Roundtrip, found 6 days ago
$822
Roundtrip
found 6 days ago
Select Air China flight, departing Mon, Sep 15 from Singapore to Washington, returning Fri, Oct 3, priced at $822 found 6 days ago
Air India
Thu, Sep 4 - Fri, Sep 19
SIN
Singapore
IAD
Washington
$1,080 Roundtrip, found 5 hours ago
$1,080
Roundtrip
found 5 hours ago
Select Air India flight, departing Thu, Sep 4 from Singapore to Washington, returning Fri, Sep 19, priced at $1,080 found 5 hours ago
Turkish Airlines
Thu, Sep 4 - Fri, Sep 19
SIN
Singapore
IAD
Washington
$1,146 Roundtrip, found 5 hours ago
$1,146
Roundtrip
found 5 hours ago
Select Turkish Airlines flight, departing Thu, Sep 4 from Singapore to Washington, returning Fri, Sep 19, priced at $1,146 found 5 hours ago
Japan Airlines
Wed, Sep 10 - Wed, Sep 17
SIN
Singapore
IAD
Washington
$1,205 Roundtrip, found 4 days ago
$1,205
Roundtrip
found 4 days ago
Select Japan Airlines flight, departing Wed, Sep 10 from Singapore to Washington, returning Wed, Sep 17, priced at $1,205 found 4 days ago
Singapore Airlines
Thu, Jan 22 - Wed, Jan 28
SIN
Singapore
IAD
Washington
$1,219 Roundtrip, found 3 days ago
$1,219
Roundtrip
found 3 days ago
Select Singapore Airlines flight, departing Thu, Jan 22 from Singapore to Washington, returning Wed, Jan 28, priced at $1,219 found 3 days ago
Swiss International Air Lines
Tue, Sep 23 - Sat, Oct 4
SIN
Singapore
IAD
Washington
$1,257 Roundtrip, found 13 hours ago
$1,257
Roundtrip
found 13 hours ago
Select Swiss International Air Lines flight, departing Tue, Sep 23 from Singapore to Washington, returning Sat, Oct 4, priced at $1,257 found 13 hours ago
Lufthansa
Sun, Mar 15 - Mon, May 25
SIN
Singapore
IAD
Washington
$1,259 Roundtrip, found 4 days ago
$1,259
Roundtrip
found 4 days ago
Select Lufthansa flight, departing Sun, Mar 15 from Singapore to Washington, returning Mon, May 25, priced at $1,259 found 4 days ago
Etihad Airways
Thu, Sep 4 - Fri, Sep 19
SIN
Singapore
IAD
Washington
$1,315 Roundtrip, found 5 hours ago
$1,315
Roundtrip
found 5 hours ago
Select Etihad Airways flight, departing Thu, Sep 4 from Singapore to Washington, returning Fri, Sep 19, priced at $1,315 found 5 hours ago
British Airways
Wed, Nov 26 - Sun, Nov 30
SIN
Singapore
IAD
Washington
$1,322 Roundtrip, found 6 hours ago
$1,322
Roundtrip
found 6 hours ago
Select British Airways flight, departing Wed, Nov 26 from Singapore to Washington, returning Sun, Nov 30, priced at $1,322 found 6 hours ago

Alternative airports near Washington

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

Select flight to Washington Dulles Intl. IAD. Cheapest option available. Average driving time to city center is 36 minutes. Flights from $1,353
IAD
Washington Dulles Intl.
Cheapest
Average driving time to city center36 min
Flights from $1,353
Flights from Singapore (SIN) to Washington (IAD)
Origin airport
Changi
Destination airport
Washington Dulles Intl.
Airlines serving
Air Canada, Air India, All Nippon Airways, British Airways, Cathay Pacific, Emirates, Etihad Airways, Japan Airlines, JetBlue Airways, Korean Air, Lufthansa, Qatar Airways, Singapore Airlines, Swiss International Air Lines, Turkish Airlines
Roundtrip price
$668
Distance
9649 mi

Singapore to Washington Flights

The cheapest times to fly from Singapore to Washington

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 Singapore to Washington are during the month of January. You can find some of the cheapest flights from Singapore to Washington with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Singapore to Washington

Sunday is one of the best days to book for cheap flights from Singapore to Washington: 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 Singapore to Washington

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 Singapore to Washington in 2025. You can also book with separate airlines for your outbound and return journeys, from $461 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 Singapore to Washington 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 Singapore to Washington 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 Changi Airport (SIN) to Washington Dulles Intl. Airport (IAD) cost?
Discover the latest flight deals from SIN to IAD by entering your preferred travel dates and searching on Expedia. Easily compare prices by departure date if you have flexibility with your schedule and use handy filters to explore prices for your preferred journey. As a member of One Key™, our free loyalty program, you can use Price Tracking to watch fares and receive notifications if prices go up or down.
What is the cheapest month to fly from SIN to IAD?
The cheapest flights from SIN to IAD are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
What is the cheapest airline that flies from SIN to IAD?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that'll take you from SIN to IAD. Sort your results by "Price (lowest to highest)" to snap up a great deal.
How many flights per day from Changi Airport (SIN) to Washington Dulles Intl. Airport (IAD)?
You'll need to take a flight with a layover if you're traveling from Changi Airport (SIN) to Washington Dulles Intl. Airport (IAD). There are no daily direct flights on this route. However, simply filter your search to include one or more stops to discover an option that works for you.
What day of the week has the most flights from SIN to IAD?
Friday is typically the busiest day for flights, while Tuesday is often the quietest.* Keep in mind that flight schedules can change based on various factors, such as the carrier and season.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Changi Airport (SIN) to Washington Dulles Intl. Airport (IAD)?
Book a flight from Changi Airport (SIN) to Washington Dulles Intl. Airport (IAD) that takes off before 3 PM to reduce the risk of delays and cancellations. Later departures have a 22% higher chance of being canceled, on average.**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 Changi Airport (SIN) to Washington Dulles Intl. Airport (IAD) last-minute?
Booking your plane ticket from SIN to IAD just before your trip is typically more expensive. But if you're flexible with your travel dates and times, you could land a cheap last-minute fare.
Is it cheaper to book a SIN to IAD flight and hotel package?
Opting for a SIN to IAD flight and hotel package is generally cheaper than booking separately. With Expedia, you can enjoy the convenience of organizing your travels in one place. Choose from our wide range of hotels and then add activities, car rentals and flights to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Changi Airport (SIN) to Washington Dulles Intl. Airport (IAD)?
If you reserved your SIN to IAD flight within the last 24 hours, you may be able to cancel or modify it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, go to our Customer Service portal for more information.

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*Available to One Key members.