S$ 605 Find Cheap Flights from Washington, D.C. to Southeast Asia – Compare and Save

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 25-8. 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

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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, 9 Sep - Wed, 23 Sep
Etihad Airways Logo
15:10 - 09:40
IAD
-
SIN
30h 30m
1 stop
Etihad Airways Logo
21:00 - 09:45
SIN
-
IAD
24h 45m
1 stop
S$ 1,168Etihad Airways
Sat, 10 Oct - Thu, 15 Oct
Turkish Airlines Logo
13:20 - 17:55
IAD
-
SIN
40h 35m
1 stop
Turkish Airlines Logo
23:05 - 11:35
SIN
-
IAD
24h 30m
1 stop
S$ 1,194Turkish Airlines
Mon, 7 Sep - Sun, 20 Sep
Turkish Airlines Logo
13:20 - 17:55
IAD
-
SIN
40h 35m
1 stop
Turkish Airlines Logo
10:25 - 11:35
SIN
-
IAD
37h 10m
1 stop
S$ 1,195Turkish Airlines
Wed, 9 Sep - Wed, 23 Sep
Turkish Airlines Logo
21:45 - 08:45
IAD
-
SIN
23h 00m
1 stop
Turkish Airlines Logo
23:05 - 11:35
SIN
-
IAD
24h 30m
1 stop
S$ 1,207Turkish Airlines
Tue, 4 Aug - Tue, 25 Aug
Air Canada Logo
09:40 - 05:15
DCA
-
SIN
31h 35m
2 stops
Air Canada Logo
07:00 - 21:48
SIN
-
DCA
26h 48m
2 stops
S$ 1,426Air Canada
Thu, 13 Aug - Thu, 20 Aug
Air Canada Logo
09:40 - 05:15
DCA
-
SIN
31h 35m
2 stops
Air Canada Logo
07:00 - 21:48
SIN
-
DCA
26h 48m
2 stops
S$ 1,428Air Canada
Mon, 10 Aug - Mon, 17 Aug
Multiple Airlines Logo
12:40 - 05:15
DCA
-
SIN
52h 35m
2 stops
Multiple Airlines Logo
22:50 - 21:48
SIN
-
DCA
34h 58m
2 stops
S$ 1,443Multiple Airlines
Tue, 10 Nov - Mon, 30 Nov
Multiple Airlines Logo
12:55 - 07:00
DCA
-
SIN
29h 05m
2 stops
Multiple Airlines Logo
23:10 - 22:38
SIN
-
DCA
36h 28m
2 stops
S$ 1,450Multiple Airlines
Tue, 27 Oct - Tue, 3 Nov
Qatar Airways Logo
07:17 - 08:45
BWI
-
SIN
37h 28m
2 stops
Qatar Airways Logo
03:15 - 21:54
SIN
-
BWI
31h 39m
2 stops
S$ 1,615Qatar Airways
Wed, 28 Oct - Tue, 3 Nov
Qatar Airways Logo
11:40 - 08:45
BWI
-
SIN
33h 05m
2 stops
Qatar Airways Logo
03:15 - 21:54
SIN
-
BWI
31h 39m
2 stops
S$ 1,637Qatar Airways
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$ 699, 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 October, when tickets cost S$ 1,331 (return) on average. On the other hand, the most expensive months are June and July, when the average cost of return tickets is S$ 2,054 and S$ 1,961 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 24% compared to booking last-minute. For the absolute cheapest price, our data suggests you should book 19 weeks before departure.

Find deals

Good to know

Low season

September

Cheapest flight

S$ 605
Best time to beat the crowds (14% 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 9988 reviews
7.3Comfort
7.1Entertainment
6.6Food
8.1Crew
7.7Boarding
Airline reviews

The flight did not have its customary snacks during the flight. Apparently they were never loaded on the plane.

6.0 GoodMarc, Jul 2026
IAD - ORD
Read more United Airlines reviews

The flight did not have its customary snacks during the flight. Apparently they were never loaded on the plane.

Worst service- attendants dont want to help and sat us in front of bathroom

We sat on the hot plane for ours with very conflicting messages. Some (most?) of this may be due to the flight control staff, but we were also repeatedly getting "we are leaving"/"we are not" messages. It was very uncomfortable

Staff could’ve been a little more cordial. The men were much more friendlier than the women. My daughter and I also missed the 2nd to last meal as we were sleeping but that is on us.

Like: departed and arrived on time. Unlike: Food options for purchase allways bad, 1 of 2 of the crew members not very friendly at all. Seats and leg room aweful. At this point I am thinking on switching to AA.

Over 5 hour delay with minimal updates or ability to standby for alternative flights. During boarding and 1 hr+ wait for takeoff, seats were drenched w water from air conditioning condensation and always leftover crumbs on carpet and seats

Our flight was canceled same day and we were never informed. Had to pay more and worse seating on another airline.

Did not like that we couldn't complete check in on-line without providing pictures of our passports. Worry about identity theft. We had no delays and boarding was handled In an efficient manner.

Excellent! I got to Munich and was transferred to my Lufthansa flight quickly, in 15 to 20 minutes, so I did not miss my flight. However, I had checked my overhead bag at the boarding gate in Tampa. That got to Tunis the next day. That is to be expected.

WiFi didn’t exist , seats were super cramped, lights stayed on near my seat for a long time while others were dimmed, the food/trash/drink cart hit my shoulder at least a couple of times while moving, food options were down to just one option by the time it got to my row, the utensils were garbage (knife bent at a couple of places by the time I was done eating) the spoon was very flimsy plastic

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.
First Class flights from Washington, D.C. to Southeast Asia
Business Class flights from Washington, D.C. to Southeast Asiafrom S$ 5,145
Premium Economy Class flights from Washington, D.C. to Southeast Asiafrom S$ 3,077
Economy class flights from Washington, D.C. to Southeast Asiafrom S$ 76