S$635 Cheap Flights from Washington to Singapore

View S$635 flight on Sun, 28 Sep, 2025Opens 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 S$635 for one-way flights and S$1,114 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Air China
Fri, 12 Sep - Thu, 2 Oct
IAD
Washington
SIN
Singapore
S$1,114 Return, found 5 days ago
S$1,114
Return
found 5 days ago
Select Air China flight, departing Fri, 12 Sep from Washington to Singapore, returning Thu, 2 Oct, priced at S$1,114 found 5 days ago
Air India
Tue, 12 Aug - Sun, 31 Aug
IAD
Washington
SIN
Singapore
S$1,160 Return, found 5 days ago
S$1,160
Return
found 5 days ago
Select Air India flight, departing Tue, 12 Aug from Washington to Singapore, returning Sun, 31 Aug, priced at S$1,160 found 5 days ago
Etihad Airways
Wed, 24 Sep - Sat, 4 Oct
IAD
Washington
SIN
Singapore
S$1,197 Return, found 5 days ago
S$1,197
Return
found 5 days ago
Select Etihad Airways flight, departing Wed, 24 Sep from Washington to Singapore, returning Sat, 4 Oct, priced at S$1,197 found 5 days ago
Korean Air
Mon, 25 Aug - Sun, 7 Sep
IAD
Washington
SIN
Singapore
S$1,251 Return, found 5 days ago
S$1,251
Return
found 5 days ago
Select Korean Air flight, departing Mon, 25 Aug from Washington to Singapore, returning Sun, 7 Sep, priced at S$1,251 found 5 days ago
Air Canada
Tue, 16 Sep - Tue, 23 Sep
IAD
Washington
SIN
Singapore
S$1,494 Return, found 4 days ago
S$1,494
Return
found 4 days ago
Select Air Canada flight, departing Tue, 16 Sep from Washington to Singapore, returning Tue, 23 Sep, priced at S$1,494 found 4 days ago
Turkish Airlines
Mon, 18 Aug - Wed, 17 Sep
IAD
Washington
SIN
Singapore
S$1,516 Return, found 1 day ago
S$1,516
Return
found 1 day ago
Select Turkish Airlines flight, departing Mon, 18 Aug from Washington to Singapore, returning Wed, 17 Sep, priced at S$1,516 found 1 day ago
United
Thu, 31 Jul - Thu, 7 Aug
IAD
Washington
SIN
Singapore
S$1,557 Return, found 1 day ago
S$1,557
Return
found 1 day ago
Select United flight, departing Thu, 31 Jul from Washington to Singapore, returning Thu, 7 Aug, priced at S$1,557 found 1 day ago
Delta
Tue, 19 Aug - Wed, 17 Sep
IAD
Washington
SIN
Singapore
S$1,576 Return, found 2 days ago
S$1,576
Return
found 2 days ago
Select Delta flight, departing Tue, 19 Aug from Washington to Singapore, returning Wed, 17 Sep, priced at S$1,576 found 2 days ago
Ethiopian Airlines
Thu, 26 Feb - Mon, 2 Mar
IAD
Washington
SIN
Singapore
S$1,581 Return, found 2 days ago
S$1,581
Return
found 2 days ago
Select Ethiopian Airlines flight, departing Thu, 26 Feb from Washington to Singapore, returning Mon, 2 Mar, priced at S$1,581 found 2 days ago
All Nippon Airways
Mon, 18 Aug - Wed, 17 Sep
IAD
Washington
SIN
Singapore
S$1,621 Return, found 1 day ago
S$1,621
Return
found 1 day ago
Select All Nippon Airways flight, departing Mon, 18 Aug from Washington to Singapore, returning Wed, 17 Sep, priced at S$1,621 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 S$902 - S$1,483 per traveller.

Graph displaying average flight prices per month

Washington to Singapore route information
Origin airport
Washington Dulles Intl.
Destination airport
Changi
Airlines serving
Air Canada, Air France, Air India, All Nippon Airways, American Airlines, British Airways, Cathay Pacific, Delta, Emirates, Ethiopian Airlines, Etihad Airways, KLM, Korean Air, Lufthansa, Malaysia Airlines, Qatar Airways, Singapore Airlines, Swiss International Air Lines, Turkish Airlines, United
Return price
S$1,113
Distance
15439 km

Perfect flights from Washington to Singapore

Your Journey from Washington to Singapore

Start your unforgettable journey with Expedia. Our broad selection of flights from Washington to Singapore caters to every travel need. Whether you're yearning for a romantic escape, a solo adventure, or a cultural immersion, we've got you covered.
 

Choosing Your Ideal Flight

With Expedia, you have access to a wide range of airlines, including Air India, Turkish Airlines, Etihad Airways, Korean Air, Qatar Airways, American Airlines, Cathay Pacific, Air Canada, United, Delta, Air China, Ethiopian Airlines, All Nippon Airways. Our selection of flights from Washington Dulles Intl. to Changi caters to every traveler's requirements, ensuring your journey aligns with your schedule. With options from 20 airlines, you're bound to find the perfect flight.
 

Maximizing Value with Washington to Singapore Flights

Experience the joy of finding cheap flights from Washington Dulles Intl. to Changi that fit your budget. Keep an eye out for our special deals and discounts, and check our flexible one-way fares from S$635 and roundtrip prices from S$1,114*.
 

Pre-Flight Essentials

Ensure a smooth journey from Washington to Singapore with Expedia. From information about check-in times and in-flight amenities to guidance on baggage policies, we provide all the essentials to prepare you for your flight.
 

Experience the Vibrant Singapore

Picture yourself stepping off the plane in Singapore and immersing yourself in the unique atmosphere of . From local markets to cultural festivals, each city offers its distinct charm. Make the most of your trip by exploring local attractions and indulging in the local cuisine. With Expedia, explore all this and more, tailored to your budget.
 

Added Convenience on Your Washington to Singapore Flight

Traveling with Expedia is more than just a flight. We offer details about in-flight amenities, baggage policies, and more to ensure a smooth and hassle-free journey. Choose from our variety of airlines and embark on a memorable journey from Washington to Singapore.
 

Beyond the Flight – Exploring Singapore

With Expedia, your adventure extends beyond the flight. Explore Singapore at your own pace by renting a car or booking a hotel. Discover hidden gems off the beaten path and create unforgettable memories.
 

Book Your Flight from Washington to Singapore with Confidence

Planning your next great adventure is a breeze with Expedia. Our user-friendly platform, unbeatable prices, and round-the-clock customer support make your travel experience seamless and stress-free. Embark on your journey from Washington to Singapore with confidence. Book your travel arrangements with Expedia today.
 
*Note: Prices may vary based on availability and are subject to change.

Frequently asked questions

How much is a flight from IAD to Singapore Airport?
Within the past 7 days on Expedia, for flights departing within the next year, the lowest price listed for a round-trip flight from IAD to SIN was S$1,114. Fares this cheap don't last forever, so make sure you book yours ASAP. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from Washington Dulles Intl. Airport (IAD) to SIN?
Most flights can be cancelled online, but every air carrier has its own set of terms and conditions. If you do need to cancel your flight, go to our Customer Service Portal and follow the instructions.
How do I find cheap flights from Dulles Intl. Airport to Singapore Airport that have flexible change policies?
Many airlines offer the option to reschedule your flight without a change fee. All you pay is the difference between the original flight and the new flight. When you're searching for Washington Dulles Intl. Airport (IAD) to Changi Airport (SIN) flights, you'll see a "no change fees" filter for you to select.
How far is the flight from Washington Dulles Intl. Airport (IAD) to Changi Airport (SIN)?
Chantilly to Singapore is around 15,500 kilometres, so be prepared to spend a while in the air. Don't forget to pack all the essentials, from your eye mask to your earphones. Throw in a few snacks to munch on throughout your flight too.
Which airlines fly direct from Washington Dulles Intl. Airport (IAD) to Singapore Airport?
You won't find any airlines flying directly between Dulles Intl. Airport and Changi Airport (SIN), so be prepared to make at least one stop on your journey. A layover can be a welcome way to break up a trip!
Are Dulles Intl. Airport to SIN flight tickets cheaper when they're purchased at the last minute?
Booking your trip from Washington Dulles Intl. Airport (IAD) to Singapore Airport at the last minute could be your ticket to an awesome deal. However, you might miss out on a flight altogether! If you'd rather not take any chances, book well ahead of your departure date. In fact, Expedia has some of the best bargains up to 12 months in advance. If your preferred carrier hasn't released tickets yet, check back frequently as deals are updated on Expedia all the time.

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*Available to Expedia members.