S$ 503 Find Cheap Flights from Washington, D.C. to Southeast Asia

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Washington, D.C. to Southeast Asia departing on 23-2. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Southeast Asia

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Washington, D.C. to Southeast Asia, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Washington, D.C. to Southeast Asia, as well as popular online travel agencies
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Cheap Flights from Washington, D.C. to Southeast Asia

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for return flights from Washington, D.C. to Southeast Asia that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent return flight deals from Washington, D.C. to Southeast Asia

Wed, 18 Mar - Wed, 25 Mar
Etihad Airways Logo
15:35 - 09:35
IAD
-
SIN
30h 00m
1 stop
Etihad Airways Logo
19:25 - 10:05
SIN
-
IAD
26h 40m
1 stop
S$ 1,075Etihad Airways
Mon, 2 Mar - Mon, 9 Mar
Etihad Airways Logo
14:35 - 09:35
IAD
-
SIN
30h 00m
1 stop
Etihad Airways Logo
19:25 - 10:05
SIN
-
IAD
26h 40m
1 stop
S$ 1,077Etihad Airways
Tue, 17 Feb - Wed, 4 Mar
Turkish Airlines Logo
13:30 - 08:35
IAD
-
SIN
30h 05m
1 stop
Turkish Airlines Logo
11:40 - 11:45
SIN
-
IAD
37h 05m
1 stop
S$ 1,121Turkish Airlines
Thu, 19 Feb - Wed, 10 Jun
Turkish Airlines Logo
21:15 - 08:35
IAD
-
SIN
22h 20m
1 stop
Turkish Airlines Logo
11:10 - 11:35
SIN
-
IAD
36h 25m
1 stop
S$ 1,145Turkish Airlines
Sun, 12 Apr - Tue, 5 May
Cathay Pacific Logo
18:59 - 12:25
DCA
-
SIN
29h 26m
2 stops
Cathay Pacific Logo
20:05 - 22:59
SIN
-
DCA
38h 54m
2 stops
S$ 1,311Cathay Pacific
Wed, 4 Mar - Tue, 10 Mar
Cathay Pacific Logo
18:37 - 11:55
DCA
-
SIN
28h 18m
2 stops
Cathay Pacific Logo
01:25 - 22:59
SIN
-
DCA
33h 34m
2 stops
S$ 1,343Cathay Pacific
Tue, 17 Mar - Tue, 24 Mar
Multiple Airlines Logo
10:19 - 08:35
BWI
-
SIN
34h 16m
3 stops
Multiple Airlines Logo
23:25 - 19:44
SIN
-
BWI
32h 19m
3 stops
S$ 1,381Multiple Airlines
Tue, 17 Mar - Tue, 24 Mar
Multiple Airlines Logo
18:59 - 19:05
DCA
-
SIN
36h 06m
1 stop
Multiple Airlines Logo
09:00 - 21:59
SIN
-
DCA
24h 59m
1 stop
S$ 1,424Multiple Airlines
Tue, 17 Feb - Wed, 25 Feb
United Airlines Logo
16:11 - 08:00
DCA
-
SIN
26h 49m
2 stops
United Airlines Logo
22:20 - 11:35
SIN
-
DCA
26h 15m
2 stops
S$ 1,431United Airlines
Mon, 27 Jul - Mon, 24 Aug
United Airlines Logo
06:29 - 18:35
BWI
-
SIN
24h 06m
1 stop
United Airlines Logo
08:45 - 05:52
SIN
-
BWI
33h 07m
1 stop
S$ 1,558United Airlines
Booking Insights

KAYAK's insights & trends for Washington, D.C. to Southeast Asia flights

Get data-powered insights and trends into flights from Washington, D.C. to Southeast Asia to help you find the cheapest flights, the best time to fly, and much more.

Can I save money by flying with a stopover from Washington, D.C. to Southeast Asia?

The average return price for all direct flights, flights with one stopover, and flights with two stopovers for the route found by users searching on KAYAK in the last 2 weeks.

No, with an average price for the route of S$ 566, prices are generally cheapest when you fly direct.

What is the cheapest month to fly from Washington, D.C. to Southeast Asia?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Washington, D.C. to Southeast Asia, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Washington, D.C. to Southeast Asia is August, when tickets cost S$ 918 (return) on average. On the other hand, the most expensive months are December and June, when the average cost of return tickets is S$ 2,519 and S$ 1,807 respectively.

How far in advance should I book a flight from Washington, D.C. to Southeast Asia?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Washington, D.C. to Southeast Asia, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below-average price on a flight from Washington, D.C. to Southeast Asia, you should book around 3 weeks before departure, which saves you about 31% compared to booking last-minute. For the absolute cheapest price, our data suggests you should book 19 weeks before departure.

Good to know

Low seasonAugust
Cheapest flightS$ 503
Best time to beat the crowds (5% less expensive on average)
Most popular time to fly (37% more expensive on average)
Flight from Washington Dulles Airport to Singapore

FAQs - booking Southeast Asia flights

  • How does KAYAK find such low prices on flights from Washington, D.C. to Southeast Asia?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Washington, D.C. to Southeast Asia.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Washington, D.C. to Southeast Asia?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Washington, D.C. to Southeast Asia is likely to change within 7 days, so travellers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Washington, D.C. to Southeast Asia?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional return ticket. You could then fly from Washington, D.C. to Southeast Asia with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Washington, D.C. to Southeast Asia?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying from Washington, D.C. to Southeast Asia up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airline flying from Washington, D.C. to Southeast Asia

 
See real verified KAYAK customer reviews for airlines flying from Washington, D.C. to Southeast Asia. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Washington, D.C. to Southeast Asia? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.4
United AirlinesOverall score based on 9229 reviews
7.7Boarding
7.1Entertainment
6.6Food
7.3Comfort
8.1Crew
Airline reviews

Very good. Because of the delays with my previous flight, I missed my connection, but I was able to book another flight through the United app easily.

10.0 ExcellentAnonymous, Jan 2026
IAD - ATL
Read more United Airlines reviews

Very good. Because of the delays with my previous flight, I missed my connection, but I was able to book another flight through the United app easily.

Was happy we finally got upgraded in 1st class. The seat getting old. The cushiness need some improvement.

Ineffective communication with United resulted in lost baggage. Their Baggage Tracing counter at MUC was shut down from 11:00-14:15 on my arrival. Undertrained, underinformed staff had me Running all over MUC to find someone to help me to no avail. Staff was rude, unhelpful, and unable to effectively use the systems they did have operational. They refused to contact United in any way or provide any accommodation or other resources while I waited for my luggage. This has destroyed my downstream itinerary. If they had even the slightest visibility I may have been able to reschedule/plan, but again, their staff provided nothing, and did nothing more than their website, which doesn’t even work on a standard phone browser. Miserable failure at all levels that weren’t associated with the operation of the aircraft.

Sat next to a one year old. She crawled all over the place and made me laugh.

The Crew and the food was the worst I ever had in Business Class. First they told us there were no space for carry on. It was plenty of space over our 2 row seats, we had to ask to let us travel with it which was accepted. They were aware that we had to run for the connection due to the previous flight delay. Have us one hour waiting for more customers and not even offer a glass of water. Then started the service and they started to serve other passengers drinks in business and did not offer any drinks until they serve our pre ordered meal and I ask for something to drink. I had to wait until they finished to serve all passengers until Inget something. The crew was the worts I ever had for Business Class in my life.

Not great experience - we were super late boarding due to issues with aircraft. Then when we finally all got onboard and seated and they started taxiing out to the runway they just stopped then turned around and went back to the airport. Apparently the crew “ran out of time” to legally fly us. They mentioned that they were about 2 minutes away from taking off. I understand the rules and safety but kinda wonder why they would have bothered boarding us in the first place? Had to go all the way back and de plane and then wait in a HUGE line to get a hotel (this is somewhere around 2:30am) finally got to hotel by Uber (no shuttle after 20min so gave up) and they ended up putting us all back on the same aircraft at 10am next morning so got about 2.5 hours sleep. They did give us. $250 credit, but it was a São Paulo Brazil flight out of Dulles. The flight and everything was fine.

Starlink wifi on the Embraer E175 is an excellent experience. I was able to connect and work from IAD all the way to approach into BTV.

7 hours delayed due to operational issues on United’s end. Basically laziness.

Short flight but an "eager to help" crew made the journey more enjoyable!

During booking, I kept trying submitting my payment from the Mexican website and it didn't work. After I had the idea to change it to the Canadian website, it worked but I had to be charged the equivalent of 50 CAD more. I received the clear instruction that I would only be able to check-in at the airport and that it was impossible to select a seat 24 hours before departure, that I had to pay 144 CAD to do so, although not only was I able to check-in 24 hours before departure, but I could have selected my seats for free then. All in all, I almost threw $200 out the window due to misleading information. Besides, the app kept crashing, the information to get to the gate on the app was inaccurate, my gate was switched and I was only informed once in the air (luckily I had noticed the departure pannel), I was not addressed in my language beforehand and even if I tried I was immediately answered in English (which meant the crew understood but didn't want to answer accordingly), there was only one snack & beverage service on my medium haul flight and no beverage service on my short haul flight. To be fair, the planes were comfortable, the crew apart from the language issue was helpful, dynamic and engaging, the plane was clean and the directions were clear and direct. United has a lot of potential to be one of my favourite airlines, but the devil is in the details and a lot of them missed the target.

Everything you need to know for your flight to Southeast Asia

Cabin class types available on flights to Washington, D.C.

Cabin classes available on flights to Washington, D.C.. Prices are the lowest found on KAYAK over the last 7 days. Price and availability is not guaranteed.