IAD - KTM

$442 Find Cheap Flights from Washington Dulles Airport to Kathmandu

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Dulles Intl to Kathmandu departing on 4/19. 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 Kathmandu

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Washington, D.C. to Kathmandu.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Washington, D.C. to Kathmandu.
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Everything you should know

Cheapest round-trip
$1,073
Typical prices: $1,175-$1,525
Multiple Airlines
Fri 9/4Sun 11/8
IAD - KTM • 2 stops
Cheapest one-way
$442
Typical prices: $491-$762
Multiple Airlines
Sun 4/19
IAD - KTM • 2 stops
Nonstop flights
Not available
There are currently no direct flights between Dulles Intl and Kathmandu. You'll need at least 1 connection.
Insights
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Top layover airports
Cheapest • Avg $955 (round-trip)
Shortest trip • 19h 41m (one-way)
Insights
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When to book
in advance
Our data shows that travelers who book at least 4 weeks in advance save around 8% compared to booking last minute.
Insights
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When to travel
Cheapest • 16% price drop
Most popular
Good to know
Good to know
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+1
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Booking Insights
Flight Deals

Cheap Flights from Dulles Intl to Kathmandu (IAD-KTM)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Dulles Intl to Kathmandu 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 Dulles Intl to Kathmandu

Fri, Sep 4 - Sun, Nov 8
Multiple Airlines Logo
11:05 am - 7:50 pm
IAD
-
KTM
23h 00m
2 stops
Multiple Airlines Logo
10:50 am - 3:55 pm
KTM
-
IAD
39h 50m
2 stops
$1,073Multiple Airlines
Mon, Apr 27 - Wed, Jul 22
Multiple Airlines Logo
3:10 pm - 7:50 pm
IAD
-
KTM
42h 55m
2 stops
Multiple Airlines Logo
10:50 am - 9:45 am
KTM
-
IAD
32h 40m
2 stops
$1,074Multiple Airlines
Tue, Apr 28 - Thu, Jan 28
Multiple Airlines Logo
3:10 pm - 1:05 pm
IAD
-
KTM
36h 10m
2 stops
Multiple Airlines Logo
10:50 am - 9:05 am
KTM
-
IAD
33h 00m
2 stops
$1,089Multiple Airlines
Wed, Sep 9 - Mon, Oct 5
Cathay Pacific Logo
11:48 am - 9:45 pm
IAD
-
KTM
48h 12m
2 stops
Cathay Pacific Logo
11:00 pm - 5:00 am
KTM
-
IAD
63h 45m
2 stops
$1,135Cathay Pacific
Wed, Apr 22 - Tue, May 26
Multiple Airlines Logo
3:10 pm - 9:30 am
IAD
-
KTM
32h 35m
1 stop
Multiple Airlines Logo
1:45 pm - 9:45 am
KTM
-
IAD
29h 45m
2 stops
$1,150Multiple Airlines
Mon, Aug 17 - Mon, Oct 5
Multiple Airlines Logo
6:00 am - 9:45 pm
IAD
-
KTM
30h 00m
2 stops
Multiple Airlines Logo
11:00 pm - 11:59 pm
KTM
-
IAD
34h 44m
2 stops
$1,152Multiple Airlines
Wed, Apr 29 - Mon, May 11
Multiple Airlines Logo
3:10 pm - 6:35 am
IAD
-
KTM
29h 40m
3 stops
Multiple Airlines Logo
2:55 pm - 9:45 am
KTM
-
IAD
28h 35m
2 stops
$1,156Multiple Airlines
Wed, Apr 22 - Tue, May 26
Multiple Airlines Logo
3:10 pm - 9:30 am
IAD
-
KTM
32h 35m
1 stop
Multiple Airlines Logo
1:45 pm - 9:45 am
KTM
-
IAD
29h 45m
2 stops
$1,158Multiple Airlines
Thu, Apr 30 - Sat, May 16
Multiple Airlines Logo
3:10 pm - 9:30 am
IAD
-
KTM
32h 35m
1 stop
Multiple Airlines Logo
1:45 pm - 9:45 am
KTM
-
IAD
29h 45m
2 stops
$1,159Multiple Airlines
Wed, Apr 22 - Fri, May 22
Multiple Airlines Logo
3:10 pm - 9:30 am
IAD
-
KTM
32h 35m
1 stop
Multiple Airlines Logo
2:55 pm - 9:45 am
KTM
-
IAD
28h 35m
2 stops
$1,170Multiple Airlines
Booking Insights

KAYAK's insights & trends for Dulles Intl to Kathmandu flights

Get data-powered insights and trends into flights from Dulles Intl to Kathmandu to help you find the cheapest flights, the best time to fly and much more.

How much is a round-trip flight from Washington, D.C. Dulles Intl Airport to Kathmandu?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Washington, D.C. Dulles Intl Airport to Kathmandu departing in September.

What is the cheapest month to fly from Washington, D.C. Dulles Intl Airport to Kathmandu?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Washington, D.C. Dulles Intl Airport to Kathmandu, 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. Dulles Intl Airport to Kathmandu is August, where tickets cost $1,188 (return) on average. On the other hand, the most expensive months are June and December, where the average cost of round-trip tickets is $1,801 and $1,541 respectively.

How far in advance should I book a flight from Washington, D.C. Dulles Intl Airport to Kathmandu?

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. Dulles Intl Airport to Kathmandu, 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. Dulles Intl Airport to Kathmandu, you should book around 4 weeks before departure, which saves you about 8% 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 flight$442
Best time to beat the crowds with an average 17% drop in price.
Most popular time to fly with an average 26% increase in price.
Flight from Washington Dulles Airport to Kathmandu

When to book flights from Dulles Intl to Kathmandu

Are your dates flexible? Find out the best times to travel from Dulles Intl to Kathmandu 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 Washington Dulles Airport to Kathmandu flights

  • What amenities and services can I enjoy at Washington Dulles International Airport (IAD)?

    While waiting on your plane to leave Washington, D.C., you'll have access to many airport amenities such as charging stations, airline lounges, an interfaith chapel, several restaurants, and ATM machines. How about relaxing before your flight leaves? There is a spa by both Gates A & B.

  • How can I get from Tribhuvan International Airport (KTM) to my hotel?

    Public transportation is limited in Kathmandu. Therefore, a taxi might be your best option for getting to your hotel. At the airport, taxis pick up passengers outside of the arrival hall. You can also arrange for a taxi at the tourist information desk inside the airport.

  • Are there banking services or a currency exchange center at the Tribhuvan International Airport (KTM)?

    Yes, there are several ways that you can conduct financial business while at the airport. If you need to withdraw funds for your trip, there are ATM machines. There are also several bank branches inside the airport where you can get more personal service and/or exchange your US dollars for the Nepalese rupee.

  • Where can I park my car at the Washington Dulles International Airport (IAD)?

    There are several places to park at the Dulle Airport while you're on vacation in Kathmandu. If you'd prefer covered parking, there are a couple of parking garages that are a short walk from the terminal. The economy parking lot is best if you're traveling on a budget. It is right off of Dulles Access Road and a quick drive from the terminal. For your convenience, there is a shuttle that goes back and forth both day and night. Curbside valet service is also available.

  • What is the cheapest flight from Washington, D.C. Dulles Intl Airport to Kathmandu?

    In the last 3 days, the lowest price for a flight from Washington, D.C. Dulles Intl Airport to Kathmandu was $442 for a one-way ticket and $1,073 for a round-trip.

  • Do I need a passport to fly between Washington Dulles Airport and Kathmandu?

    Yes, you'll most likely have to show a valid passport before boarding the plane in Washington Dulles Airport and on arrival in Kathmandu.

  • Which aircraft models fly most regularly from Washington Dulles Airport to Kathmandu?

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

  • Which airline alliances offer flights from Washington Dulles Airport to Kathmandu?

    Star Alliance, and oneworld are the airline alliances operating flights between Washington Dulles Airport and Kathmandu, with Star Alliance being the most commonly used for this route.

  • What is the most popular layover when flying to Kathmandu from Washington Dulles Airport?

    Doha is the most popular layover city among KAYAK users traveling from Washington Dulles Airport to Kathmandu.

  • Which is the best airline for flights from Washington, D.C. to Kathmandu, Emirates or SWISS?

    The two airlines most popular with KAYAK users for flights from Washington, D.C. to Kathmandu are Emirates and SWISS. With an average price for the route of $1,281 and an overall rating of 8.1, Emirates is the most popular choice. SWISS is also a great choice for the route, with an average price of $1,659 and an overall rating of 7.5.

  • How does KAYAK find such low prices on flights from Washington Dulles Airport to Kathmandu?

    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 Dulles Airport to Kathmandu.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Washington Dulles Airport to Kathmandu?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Kathmandu from Washington Dulles Airport 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 Dulles Airport to Kathmandu?

    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 Kathmandu with an airline and back to Washington Dulles Airport with another airline. Booking your flights between Washington Dulles Airport and KTM can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Washington Dulles Airport to Kathmandu?

    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 Kathmandu from Washington Dulles Airport up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from Washington, D.C. Dulles Intl Airport to Kathmandu

  • When booking your flight from Washington Dulles International Airport (IAD), you'll have your choice of flights. You'll have to change planes at least once in a major airport such as Doha Hamad International, Dallas/Fort Worth, Dubai International, or Delhi. Some layovers are as short as 48min.
  • Kathmandu Tribhuvan International Airport (KTM) services Kathmandu City and Kathmandu Valley. It has just two terminals, one for domestic flights and the other for international flights. The airport is about a 10min drive from Kathmandu's city center, 15min to Thamel, and about 16min from Patan.
  • You'll be able to get around Washington Dulles International Airport quickly using its airport transportation system. Known as the Aero Train, it takes passengers from one terminal to another. There are also moving walkways and shuttle service in between stations.
  • To help with your travel plans, there is a tourist information desk at the Kathmandu Tribhuvan Airport (KTM). It offers information about local attractions, accommodations, transportation, and places to eat.
  • If someone is dropping you off at the Washington Dulles International Airport (IAD), there are a few options. If you can get out of the car fast, curbside dropoff is very convenient. If you'll need a little time and don't want to be rushed, the terminal parking lot or one of the garages is ideal. Both provide easy access to the terminals via a covered walkway.

Reviews of the top 5 airlines serving from Dulles Intl to Kathmandu

 
See real verified KAYAK customer reviews for airlines flying from Washington, D.C. to Kathmandu. 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 Dulles Intl to Kathmandu? 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.
8.1
EmiratesOverall score based on 3543 reviews
7.9Food
8.0Comfort
8.2Entertainment
8.1Boarding
8.3Crew
Airline reviews

Very good from the beginning to the end. Amazing experience

10.0 ExcellentDiego, Feb 2026
MIA - DXB
Read more Emirates reviews

Very good from the beginning to the end. Amazing experience

I liked the newer aircraft CRJ-550 since it had WIFI and the seats are more spacious.

Fly Dubai takes low cost and thrift to new depths in terms of service levels, terminal 2 is grossly inadequate for capacity and resembles a crowded buss or railway station,, the fly dubai( Emirates) flight is never on time(was 2.5 hrs delayed), and this is not an isolated experience, the flght air conditioning was turned low while we waited on the tarmac for take clearance to save fuel, should say more!!!! The depths! I only fly this airline from a compulsion, emirates code shares for connections to Muscat

They changed the flight time without telling us and were unwilling to help with rebooking because we booked through orbits/kayak

Emirates did great! I liked the service, the food, cleanness, and the flight was on time. Much better airline than Qatar Airways I flew with last year.

I lost my lock from my luggage, I don’t know someone took something from my bag.

Except for the uncleaned tray, and the delay in serving food for our section (which may have been due to the location of our row) everything else was good. The crew were very professional and responded to our requests promptly throughout the flight. We as a family were not disappointed by Emirates.

It was great, a little more leg room would have been better particularly since we were in premium economy

The boarding process was smooth and the stewardesses were nice. Some delays with drinks at the end of the flight, but no issues.

Thay crew was so nice.Air hostess il ham was so nice.my mom was little scray with airplan turbulence she help us alot.

Extremely uncomfortable seats with very little cushioning, unable to recline enough to sleep comfortably on this 13 hour overnight flight. My body was in pain by the end.

When we checked in at the Siem Reap Airport in Cambodia, we were only given three boarding passes and told that we would have to check in with American when we arrived in Boston. This was a source of stress for us. After we landed in Boston, we had a long passage from Terminal E to Terminal B (American Airline ticketing counter). Because the electronic ticketing kiosks for check-in would not recognize our Confirmation Code, we had to wait for an hour in a long line where only two AA reps were taking care of Special Services passengers. In many years of both business and recreational travel, I have never had this experience. I would expect more from AA being in partnership with other airlines to do a better job with this.

Our experience on the Doha to Hyderabad segment was extremely stressful due to prolonged delays and a lack of clear communication from the airline. We were traveling as a family, including children, and the uncertainty around timing and next steps caused significant distress. There was very little proactive information provided during the delay, and we were not given clear written explanations about what was happening or how long it might take. This made it difficult to manage the situation, especially while caring for children in a transit environment. In addition, one member of our party was ultimately unable to continue travel, which added to the emotional strain and disruption of the trip. Overall, the experience highlighted gaps in communication, customer care, and handling of unexpected situations. We are sharing this feedback so that future passengers, especially families, are supported with clearer communication and better assistance during irregular operations.

The seat cushions are absolutely lacking, not sure if they know the passengers are traveling for 14 hours straight, but the padding made our back and butt ache like crazy. The entertainment console had its own problems, either the headphone jack wasn't working or the power outlet via usb or ac outlet was not working. Not to mention the seat handles were not adjustable in some planes in the middle or on the aisle. Qatar/Indigo may be operating a very old fleet of planes to make as much profit as possible, but passengers may not be following them for long, should this treatment of its customers continue. Qatar/Indigo, wake up and do it right by your customers, or they may not be your customers anymore.

It would help id flight crew were not rude and showed some courtesy. They were shouting at passengers and yelling instructions as if we were school children at lunch cafeteria!!

All good. Over four hours flight if provided snacks like Qatar Airways would be better

Lobster starter in business class was not good, tough, served cold, and without butter. Movie selection was missing latest releases, did not offer older classic, high quality movies

Food was absolutely pathetic. I wasted so much food which I thought was inedible. I also loathe the inflight entertainment system which has very little content

My entire row did not have power for the full duration of a 14.5 hour flight. Could not charge any devices such as laptop or phones for the entirety of the long flight. The flight attendants tried to remedy the issue by resetting the power, but were not successful. The only other solution provided was to move me to another seat on the plane which was in the middle row. I had paid for a “preferred” seat that was a window seat. This was a downgrade being offered due to the power issue.

Nothing to complain. The staff and flight was good especially the seats which was better compared than the cloth ones on Qatar airways

IAH to Istanbul was outstanding across the board. The flight from Istanbul to Male was good, not great.

the cabin was kept too hot. couldn't sleep as a result

It was an amazing experience. Flight crew's service, hospitality, and the food were phenomenal. I don't think I'd want to try any other airline company after this. I would definitely recommend to friends and family. Thank you Turkish Airlines !

Business Class pods are horrible. If you're petite, you might be able to sleep on the uncomfortable seat and bed. Crew and food are fantastic.

I have travelled many times on Turkish, but they always board at least 30-40 minutes past the stated time. If informed properly, passengers can choose to spend more time in the .lounge instead of standing around by the gate waiting to board. The new lounge at DFW was a big disappointment. The aircraft itself was a shock. In the past I have flown this sector with regular business class seating configuration of 1-2-1, The 2-3-2 seating is very disappointing after paying such high prices for tickets. The DFW to Istanbul segment was slightly better, but the Istanbul to Delhi segment was no better than premium economy. I will try to travel more on airlines which give business class passengers more value for their money.

Good overall. Seat spacing a bit tight between IST and ISB.

Excellent staff despite some trying passenger situations. Very impressed with their good attitudes and kindness.

Crew were unfriendly, touch screen for movies didn't work very well, seats were tight and uncomfortable

After arriving in Istanbul, the transit information on the electronic board showed a tight departure time, and the gate changed in the middle, making it difficult to make it on time.

Typically good service onboard but baggage delay in airport was significant

Screens should work, Seating need to be comfortable, Luggage management was worse. Took 2 hours to get my luggage

Flight was delayed 110 mins.. Crew on Ground or in Air had no regrets.. No apologies... Very poor boarding process... Awful food and beverage choice.

Flight was delayed and due to this we almost miss the connection flight

The flight was delayed by 3 hours, causing me to miss my connecting international flight. I then had to wait in the airport 18 hours for the next flight. The reason for the delay was a computer issue, not something outside of their control like weather. To add insult to injury, instead of trying to expedite the flight to make up for lost time, they ran a carry-on baggage check to verify every bag onboard belonged to someone on the plane, which took another 20 minutes.

झूठा है इंडिगो फ्लाइट में मील दिया नहीं जब शिकायत किया तो बोला आपको मिल चुका है

It took a lot of time to declare that the flight gonna be cancelled ☹️ very disappointed.

Electronic check in is must these days. Food could be better.

They denied my meal which was included in ticket and also damaged my bag completely and broke the wheel and still not accepting their fault

As budget airline everything was good. Except that - boarding process can be more organised. Then if entertainment systems are not operational. Its better to keep them switch off.

Very nice and pleasant. Boarding was quick and the crew were responsive

Flight was cancelled by air India. There was no explanation provided why the flight was cancelled. Found out that the flight was cancelled because the Iran air space was closed. Meanwhile, all other flights passing through that region were operating without issues. When asked to refund money for the tickets, being told that “ As checked, we wish to share that Flight AI 116 on 15 January 2026 from New York to Mumbai was cancelled due to Iran airspace closure, which were beyond the airline’s control. While such events can disrupt travel plans, we appreciate your understanding and patience. Our team remains committed to ensuring the safety and comfort of all passengers and takes all necessary measures to minimize any issues. However, we must inform you that compensation is not applicable under these extraordinary circumstances, in accordance with the relevant regulations.” Completed unacceptable and unprofessional behavior!

Needs lots of improvement starting from crew/staff attitude, cleanliness, better quality food & in flight amenities.

Food was below par Quality and None of the Entertainment systems were Working ..and we were unable to turn it off.. Due to the glare we couldn't even sleep for the entire duration of the flight ..

Horrible flight. No entertainment or WiFi for a 14-hour flight. No explanations either. I’ll never fly Air India again.

Several seats in business class were broken. Some would not recline, others had other problems. They need to really update the seats and AV.

Never can get flight and nof light for three days .finally travel by bus. Very bad experience.

Food not of any international or even Indian standard. We have many cuisine available but only paneer & sundry items. Improve & provide some good indian items. Entertainment website or channel out of order.

First and the foremost I was shocked to see airindia standards have come down so low . The food was horrible . They served us 3 meals for vegetarian and all the was paneer . The orange juice was not at all cold it was smelly . After you take this heavy price air India should learn from other air lines . I at one point felt like throwing up . After all this when we landed we were not given landing slip . We had to wait for 45 min at the immigration just because no one was given landing slip . To top it all we were 3 passengers and had checked in 4 check in luggage . Out of which 3 have not yet arrived . Basically status says the loaded it in our flight ( this was a direct fight ) and it never reached . We are still waiting . There is nothing great to tell about our flight . The he only good thing was the crew were very helpful .

Lay out shows 1st row and second row given after taking payment. It's a fraud

The seats were extremely uncomfortable. Air India seats used to be very comfortable . with sufficient legroom. In this aircraft there was no legroom. It is a shame that for your profit margins you are trying to pack people like cattle on these long haul flights. The food was terrible. The bread was hard like a rock. Mr CEO of Air India, why don’t you take a flight in economy from India to USA and experience the hardships first hand. It is utter disgrace

Everything you need to know for your flight from Dulles Intl to Kathmandu

Information on your arrival and departure airports