WAS - SIN

$418 Find Cheap Flights from Washington, D.C. to Singapore

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 Singapore departing on 9/18. 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

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

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Washington, D.C. to Singapore.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Washington, D.C. to Singapore.
Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 20% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Bundle and saveSave money when you bundle your flight + hotel.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Flights Deals
Useful Info
Flights Deals

Cheap Flights from Washington, D.C. to Singapore (WAS-SIN)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Washington, D.C. to Singapore 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 round-trip flight deals from Washington, D.C. to Singapore

Wed, Aug 27 - Mon, Sep 8
Air India Logo
12:50 pm - 7:30 pmIAD-SIN
42h 40m1 stop
Air India Logo
8:30 pm - 7:40 amSIN-IAD
23h 10m1 stop
$789Air India
Find Deal
Wed, Aug 27 - Sun, Sep 7
Air India Logo
12:50 pm - 7:15 amIAD-SIN
30h 25m1 stop
Air India Logo
11:00 pm - 7:40 amSIN-IAD
44h 40m1 stop
$794Air India
Find Deal
Tue, Aug 26 - Sun, Aug 31
Air India Logo
12:50 pm - 7:15 amIAD-SIN
30h 25m1 stop
Air India Logo
11:00 pm - 7:40 amSIN-IAD
44h 40m1 stop
$799Air India
Find Deal
Mon, Sep 15 - Sun, Sep 21
Qatar Airways Logo
9:00 pm - 3:35 pmIAD-SIN
30h 35m2 stops
Qatar Airways Logo
3:10 am - 3:40 pmSIN-IAD
24h 30m1 stop
$1,100Qatar Airways
Find Deal
Wed, Nov 26 - Sat, Dec 6
Qatar Airways Logo
8:05 pm - 12:55 pmIAD-SIN
27h 50m2 stops
Qatar Airways Logo
8:25 pm - 3:55 pmSIN-IAD
32h 30m1 stop
$1,125Qatar Airways
Find Deal
Wed, Nov 26 - Sat, Dec 6
Turkish Airlines Logo
12:55 pm - 5:35 pmIAD-SIN
39h 40m1 stop
Turkish Airlines Logo
11:25 pm - 7:15 pmSIN-IAD
32h 50m1 stop
$1,128Turkish Airlines
Find Deal
Thu, Dec 4 - Wed, Dec 10
Turkish Airlines Logo
9:10 pm - 5:35 pmIAD-SIN
31h 25m1 stop
Turkish Airlines Logo
11:25 pm - 7:15 pmSIN-IAD
32h 50m1 stop
$1,129Turkish Airlines
Find Deal
Thu, Jul 17 - Thu, Jul 31
United Airlines Logo
6:42 am - 6:25 pmBWI-SIN
23h 43m1 stop
United Airlines Logo
8:45 am - 5:28 amSIN-BWI
32h 43m1 stop
$1,134United Airlines
Find Deal
Wed, Jul 30 - Wed, Aug 6
United Airlines Logo
7:00 pm - 6:15 amBWI-SIN
23h 15m1 stop
United Airlines Logo
8:40 pm - 7:43 amSIN-BWI
23h 03m1 stop
$1,225United Airlines
Find Deal
Wed, Sep 17 - Wed, Oct 1
American Airlines Logo
6:00 am - 12:20 amBWI-SIN
30h 20m2 stops
American Airlines Logo
1:55 am - 11:18 pmSIN-BWI
33h 23m2 stops
$1,248American Airlines
Find Deal
Useful Info

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

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

What’s the cheapest day of the week to fly from Washington, D.C. to Singapore?

The average price of all round-trip flights from Washington, D.C. to Singapore clicked on KAYAK for each day over the last 12 months.

For Washington, D.C. to Singapore, Friday is the cheapest day to fly on average and Saturday is the most expensive. Flying from Singapore back to Washington, D.C., the best deals are generally found on Saturday, with Monday being the most expensive.

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

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 Singapore, 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 Singapore is October, where tickets cost $1,000 (return) on average. On the other hand, the most expensive months are December and July, where the average cost of round-trip tickets is $1,805 and $1,588 respectively.

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

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 Singapore, 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 the flight from Washington, D.C. to Singapore, you should book around 3 weeks before departure. For the absolute cheapest price, our data suggests you should book 12 weeks before departure.

Good to know

Low seasonJune
High seasonDecember
Cheapest flight$418
Best time to beat the crowds but there is an average 15% increase in price.
Most popular time to fly with an average 46% increase in price.
Flight from Washington Dulles Airport to Singapore

When to book flights from Washington, D.C. to Singapore

Are your dates flexible? Find out the best times to travel from Washington, D.C. to Singapore based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Washington, D.C. to Singapore

  • What is the cheapest flight from Washington, D.C. to Singapore?

    In the last 3 days, the lowest price for a flight from Washington, D.C. to Singapore was $418 for a one-way ticket and $789 for a round-trip.

  • Do I need a passport to fly between Washington, D.C. and Singapore?

    Yes

  • Which airports will I be using when flying from Washington, D.C. to Singapore?

    There are 2 airports in Washington, D.C. (Washington, D.C. Reagan-National and Washington, D.C. Dulles Intl.) and only 1 airport in Singapore (Singapore Changi). The cheapest flights are generally found on the Washington Dulles Airport to Singapore Changi flight route.

  • Which aircraft models fly most regularly from Washington, D.C. to Singapore?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Washington, D.C. to Singapore?

    Star Alliance, SkyTeam, and oneworld are the airline alliances operating flights between Washington, D.C. and Singapore, with Star Alliance being the most commonly used for this route.

  • What is the most popular layover when flying to Singapore from Washington, D.C.?

    Istanbul is the most popular layover city among KAYAK users traveling from Washington, D.C. to Singapore.

  • Which is the best airline for flights from Washington, D.C. to Singapore, Korean Air or Qatar Airways?

    The two airlines most popular with KAYAK users for flights from Washington, D.C. to Singapore are Korean Air and Qatar Airways. With an average price for the route of $1,346 and an overall rating of 8.4, Korean Air is the most popular choice. Qatar Airways is also a great choice for the route, with an average price of $1,249 and an overall rating of 7.4.

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

    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 Singapore.

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

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

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

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Singapore with an airline and back to Washington, D.C. 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 Singapore?

    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 to Singapore from Washington, D.C. up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top 5 airlines serving from Washington, D.C. to Singapore

 
See real verified KAYAK customer reviews for airlines flying from Washington, D.C. to Singapore. 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 Singapore? 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.
8.0
Alaska AirlinesOverall score based on 10000 reviews
8.1Boarding
8.5Crew
7.8Comfort
7.1Food
7.1Entertainment
Airline reviews

Food was just ok..had snack box :( Crew was very nice

8.0 ExcellentAnonymous, Jun 2025SEA - MKE
Read more Alaska Airlines reviews

Food was just ok..had snack box :( Crew was very nice

The Alaska app and website were not fully operational. I had to spend about 15 minutes at the counter doing things that should have been completed online. The agent was very nice and helpful, however.

Could have service kiosks, had to find a gate with an attendant

Flying on Hawaiian Airlines was good. But, getting a boarding pass was a hassle. I booked what I thought was an Alaska Airlines flight that was actually a Hawaiian Airlines flight. I couldn't check in online. I had to wait for the Hawaiian Airlines counter to open so I could get my boarding pass which was a requirement for me to get in The Club or the Centurion Lounge. (I had no check in luggage so I didn't expect to have to physically check in.) The Alaska Airlines staff blamed the FAA for the problem.

Passengers were not informed timely of delays. The staff appeared like they didn't really care about the passengers.

Food and entertainment aren’t a thing on these regional flights. But it was a smooth flight. Could see gorgeous countryside through the large windows. The earplugs are a nice touch for the prop engines but the hum of the engines did not bother me. Grateful the option exists to easily get from A to B.

Both flights were delayed going to our destination and leaving, and communication about the delays was not great by the airlines, now the crews were phenomenal and great to be around!!

Both flights were delayed due to an incident at SEA. The problem really rests with inadequate customer & plane facilities for Skywest at SEA. You feel like you are in a cattle enclosure. And planes were sitting on taxiways waiting for parking so every plane was late. SEA appears to be over capacity. It is not a fun passenger experience waiting. But crews and flights were all fine. Alaska needs to step up.

Really good except my daughter's tv broke during the flight so she could watch tv

Staff are helpful and patient. I don’t appreciate the almost 5 hours delay and also the delay of our luggage and being switched from one carousel to another to pick them up.

This trip was the most comfortable one I have ever experienced, the team was excellent and very helpful. I am so glad I picked Qatar Airways.

All the crew members were too slow and rude. Most of the times the registers were empty, while hundreds of customers were waiting in line, and it was impossible to get a supervisor. Despite being in line on time, I missed my freight, plus a some customers who were ahead and behind me.

Well organized boarding, efficient and on time. Nice crew on the plane. Thank you!

The Qatar Airways staff pre-boarding and also on the flight from Dallas to Doha were incredibly mediocre and arrogant. Consider retraining these individuals Other flights were ok.

My experience with Qatar airway was very unsatisfactory. They lost my child’s stroller and I was told they found it and will send it to the hotel which was a lie. I had to go back to the airport baggage claim and pick up myself after trying to contact them many times!. There was a lack professional and communication. I am very disappointed in Qatar airway and will not be recommending them to friends and family nor will I be flying with them in the future.

Worst air experience in whole life . Boarding and checking was hassle as they did 3 times. Crew team was clueless about passengers need. Despite of passengers raising hand , they were resetting the program

The food is not good and also if you ask crew to bring something they say ok I will bring but you will never get it. Please they should listen good to passengers

No difference between US airline and Qatar. Both cramp as many people. The airline seems to change planes without notice choice is seating when making reservations online doesn’t match the plane a passenger is on. Especially paying extra. Nothing special No different than US carriers.

Did not like anything. Seats were crammed, leg space was minimal and food was terrible. This was the first time traveling overseas in American Airlines and was the worst experience ever. Have learned a lesson to never travel in American Airlines.

Delayed my flights and no communication. We end up spending 6 hrs in Doha. No food or any concern from the airline. Terrible

Gate agent did not hold flight for connection, provided no assistance to get new flight

Evidently, my seat had the only broken TV. I couldn’t plug it in, get it to come on, or watch anything, and of course, no one could fix it while we were on the plane. The service was good and the boarding was quick

I fly UAL 7-8 times per year. This flight was not up to snuff because it boarded very late "due to unexpected delays in restocking the plane" and yet Flight Aware showed the plane had landed some 10 hours earlier--so I think they could have planned accordingly. The FA's were nice but harried. The video system had to be rebooted 3-4 times. The food service was rather abrupt; they forgot my row and when I asked for my meal, they brought it with some impatience. Overall, the flight was fine, but the little details made it feel somewhat mundane and hurried.

I didn’t get on plane. Passport being processed by consulate with visa application. Tried to cancel through underpricer after purchasing cacelling for any reason. No dice, they are thieves.

When I booked it on Kayak it aaid that I wasn't allowed hamd luggage. I called United Airlines and it took them 6 minutes to figure out if I was allowed free hand luggage. Surely something that simple they should be able to tell me instantly.

We were delayed in Toronto on the tarmac for THREE hours with no clear indication as to why except that it was not a safety hazard. Pilot did apologize more than once but even he was unable to explain why exactly we were delayed. I overheard the stewards saying that the captain was very frustrated with the situation as well because he was not able to explain why except it had something to do with water supply or system on the aircraft and now we needed to wait for an engineer to approve the aircraft for flight. It was very frustrating and distressing as a passenger and we should have been given complimentary meals at the very least.

Flight was cramped with every seat taken. The food was fine, nothing crazy to write home about. The plane felt dated and needing some TLC, the button for the window shade didn't work and there were no AC outlets to use. When communicating with staff all except one nice lady never seemed happy to help me almost like I was bothering them when asked for things like a glass of water or a snack. The flight was overall fine. It did what was needed which is get me from point A to point B. But it certainly was not special. I don't expect much in economy but I believe economy on a host of other airlines is more memorable and better experience.

The flight was heavily booked so boarding was a lengthy process. The FA’s were rather abrupt during this process but became more gracious as the flight went on. Breakfast (puffed pastry and chewy sausage) was pretty horrible but there was fruit and yogurt which they didn’t mess up. Overall it was fine.

UA28 was good service and meals. UA is upgraded, I would like to book for next flight by UA Thanks Liao

Liked nothing. As per previous segment it was delay delay delay.

Bad experience; they are not good anymore. They charge too much for luggage seat are so uncomfortable, Flight delays which may miss your next flight, they don’t care if you miss the flight or not. Zero customer services for front desk representatives Istanbul's airport I’m not using this airline any more.

I’ve been traveling for 20 years. I tried Turkish airline for the first time horrible horrible service and it would be my last time even if I get offer for a free ticket, I will not accept it. They have races and the worst Flight attendant

It wasn't good. I didn’t understand. They changed 320 dollars for 2 luggage. My ticket was regular and I paid almost 1200.00 dollars. Why they did charge? I want my money back.. thanks Yılmaz polat

Very punctual, the onboard staff was friendly and correct, the flight was fortunately very calm, the toilets were clean, in short, an excellent experience Thanks

Ordered Vegan meal - it was ok, but not exceptional. Seat ok row 39 middle section aisle. Nearly full flight - crew was busy but they did the best they could. There was a USB A port at the seat. I listened to my own music and only looked at flight information. One nice thing was the connection information was made available in the screen.

Very nice and friendly crew. Boarding system can be improved.

The Etickets had been changed (Why?) without notice ; Hence, that caused troubles when checking in. Not until I contacted my ticket agent and was given correct Etickets could I then check in.

Cleanliness of seats, trays, storage pockets need more attention, but everything else was good.

A great airline, no complaints at all. My experience with Cheap Tickets was very disappointing however. Two hours after purchasing the flight they called to tell me that the ticket price had gone up. I’ve never heard of such a thing. That is called false advertising; I will never use this ticketing service again and will warn all friends to never use it.

One of the worst check in process at the DIA as well as the boarding counter Changed seat at the last minute and assigned middle seat while I paid for window seat. Requested many times but to no avail . horrible customer service and very poor process Requesting refund for seat that was changed last minute

Loved the staff, boarding and drink options! Wish the comfort of the seat could have been better nevertheless

The chair cushions may need an upgrade. I have been noticing they are so worn out, thin so you’d sit in a dip 😄. Other than that, all was an enjoyable trip. Thanks AA!

Food was terrible, all served at once, poor quality . Wine and bread offered only once.

I’m impressed that we were on time in Sacramento after having a late departure in Newark and our made it. The staff was friendly and warm.

Cramped seats. FAA should make airlines have more legroom, for even short people complain

5.5 hour delay with no explanation on why, along with no proactive effort to reaccomodate me.

It was one of my worst flight ever. First they were changing the gate for at least 4 times, changing from gate D7 to D12 to D44. Considering the size of the Miami Airport, we are talking about long distance and the train at the airport was not working. Then the flight was delayed around one hour. Then finally we boarded into the plane and when everybody was seated, there was an announcement that there is an issue with one of the tire of the plane, so we all had to get out of the plane with our belongings, to replace the tire. So we had around 2.5-hour delay

Most miserable flight ever. We waited almost 2 hours on the runway because the flight was oversold. American offered $1200 credit. Then there was some nonsense about weight distribution. Ridiculous. No food for 8 plus hours on the flight. I will be writing a letter.

Honestly, I haven’t flown American in years, probably due to the pandemic and my being unable to travel for certain periods in the last two years, but it was a good experience to dig out or obtain a new American Airlines account after many years of traveling for business with American in the past.

Pitch was very small. Knees were on the seat back in front of me.

Everything you need to know for your flight from Washington, D.C. to Singapore

Information on your arrival and departure airports

Not what you’re looking for? Find thousands of other hotels, flights, car rentals and package deals with KAYAK.