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Cheap Flights from Washington D.C. (IAD) to Kathmandu (KTM)

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Compare Washington Dulles to Kathmandu flight deals

Find the cheapest month or even day of the year to fly to Kathmandu

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Flight deals from Washington Dulles to Kathmandu

Looking for a cheap last-minute deal or the best return flight from Washington Dulles to Kathmandu? Find the lowest prices on one-way and return tickets right here.
Kathmandu.$1,637 per passenger.Departing Thu, 8 May, returning Fri, 23 May.Return flight with IndiGo.Outbound indirect flight with IndiGo, departs from Washington Dulles on Thu, 8 May, arriving in Kathmandu.Inbound indirect flight with IndiGo, departs from Kathmandu on Fri, 23 May, arriving in Washington Dulles.Price includes taxes and charges.From $1,637, select.
Kathmandu.$1,744 per passenger.Departing Thu, 15 May, returning Wed, 15 Oct.Return flight with Qatar Airways and IndiGo.Outbound indirect flight with Qatar Airways, departs from Washington Dulles on Thu, 15 May, arriving in Kathmandu.Inbound indirect flight with IndiGo, departs from Kathmandu on Wed, 15 Oct, arriving in Washington Dulles.Price includes taxes and charges.From $1,744, select.
Kathmandu.$1,778 per passenger.Departing Tue, 26 Aug, returning Sun, 28 Sep.Return flight with IndiGo.Outbound indirect flight with IndiGo, departs from Washington Dulles on Tue, 26 Aug, arriving in Kathmandu.Inbound indirect flight with IndiGo, departs from Kathmandu on Sun, 28 Sep, arriving in Washington Dulles.Price includes taxes and charges.From $1,778, select.
Kathmandu.$1,799 per passenger.Departing Sun, 11 May, returning Mon, 30 Jun.Return flight with IndiGo.Outbound indirect flight with IndiGo, departs from Washington Dulles on Sun, 11 May, arriving in Kathmandu.Inbound indirect flight with IndiGo, departs from Kathmandu on Mon, 30 Jun, arriving in Washington Dulles.Price includes taxes and charges.From $1,799, select.
Kathmandu.$1,802 per passenger.Departing Sun, 7 Sep, returning Sun, 28 Sep.Return flight with IndiGo.Outbound indirect flight with IndiGo, departs from Washington Dulles on Sun, 7 Sep, arriving in Kathmandu.Inbound indirect flight with IndiGo, departs from Kathmandu on Sun, 28 Sep, arriving in Washington Dulles.Price includes taxes and charges.From $1,802, select.
Kathmandu.$1,934 per passenger.Departing Sat, 13 Sep, returning Sun, 5 Oct.Return flight with IndiGo.Outbound indirect flight with IndiGo, departs from Washington Dulles on Sat, 13 Sep, arriving in Kathmandu.Inbound indirect flight with IndiGo, departs from Kathmandu on Sun, 5 Oct, arriving in Washington Dulles.Price includes taxes and charges.From $1,934, select.
Kathmandu.$1,961 per passenger.Departing Fri, 10 Oct, returning Sun, 19 Oct.Return flight with IndiGo.Outbound indirect flight with IndiGo, departs from Washington Dulles on Fri, 10 Oct, arriving in Kathmandu.Inbound indirect flight with IndiGo, departs from Kathmandu on Sun, 19 Oct, arriving in Washington Dulles.Price includes taxes and charges.From $1,961, select.
Kathmandu.$1,975 per passenger.Departing Tue, 26 Aug, returning Tue, 21 Oct.Return flight with IndiGo.Outbound indirect flight with IndiGo, departs from Washington Dulles on Tue, 26 Aug, arriving in Kathmandu.Inbound indirect flight with IndiGo, departs from Kathmandu on Tue, 21 Oct, arriving in Washington Dulles.Price includes taxes and charges.From $1,975, select.

Find the cheapest month to fly from Washington Dulles to Kathmandu

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Washington Dulles to Kathmandu flights are currently cheapest in May.
May
from $1,637
Jun
from $2,013
Jul
from $2,157
Aug
from $2,304
Sep
from $1,802
Oct
from $1,961
Nov
from $3,202
Dec
Find prices
Jan
Find prices
Feb
from $2,321
Mar
Find prices
Apr
from $2,425

Washington Dulles to Kathmandu: Alternative routes

Compare routes from Washington Dulles to Kathmandu below. You may find an airport to fly into that's cheaper, faster, or easier than Kathmandu.

Washington D.C. to Kathmandu: Flight information

The things to know before you go.
Cheapest flight found$1,637
Cheapest month to flyMay

Finding cheap flights from Washington Dulles to Kathmandu: Frequently asked questions

The best price we found for a return flight from Washington Dulles to Kathmandu is $1,637. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
Currently, there are no airlines that fly direct from Washington Dulles to Kathmandu. But we found flights with one or more stops from $1,637.
As of May 2025, there are no flights flying from Washington Dulles to Kathmandu.
The cheapest month to fly from Washington Dulles to Kathmandu is usually May.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Washington Dulles Airport to Kathmandu Airport on Thursday, 8 May 2025.
No airlines currently offer direct flights between Washington Dulles Airport and Kathmandu Airport. Most routes have one or more stops.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Kathmandu but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Kathmandu is around 40 days in advance, so don’t leave your flight to the last minute.
Currently, IndiGo offers the cheapest flight tickets to Kathmandu.

Flying from Washington Dulles International Airport (IAD) to Tribhuvan International Airport (KTM): what you need to know

  • Kathmandu's timezone is UTC+5:47, which makes Kathmandu nine hours 48 minutes ahead of Washington DC.

  • Arriving two hours before an international flight and one hour ahead of a domestic departure are travel rules to live by. Make sure you're at the airport on time to board your IAD to KTM flight.

  • You'll likely experience bigger queues in popular months such as April. Arriving up to four hours ahead of an international flight and two hours for domestic departures will give you ample time for security and boarding.

  • Consider adding a stopover when booking your ticket from Washington Dulles International Airport to Tribhuvan International Airport. Just uncheck 'Direct flights only' to break up your journey, or maybe even explore a new city along the way. Here's where you can stop between IAD and KTM:

    • Istanbul Ataturk Airport

    • Hamad International Airport

    • Dubai Airport

How to find the cheapest flights from Washington Dulles International Airport (IAD) to Tribhuvan International Airport (KTM)

  • The cheapest price we've seen for a one-way Washington Dulles International Airport to Tribhuvan International Airport flight is $656. A round-trip ticket right now is $1,637. Depending on the availability when you book, these fares could change.

  • It's usually best to book as early as possible if you're hoping to get cheap tickets from IAD to KTM. That's because flight prices are based on demand, which tends to increase closer to the date of departure.

  • Getting cheap flights from Washington Dulles International Airport to Tribhuvan International Airport is easy if you can be flexible with your trip dates. Use the 'Whole month' search function to see the best prices across every month and snap up a great deal.

  • You don't need to check back in every day to see if fares have gone down when you create a Price Alert. We'll send you an update the moment there's a better deal on cheap flights from IAD to KTM.

  • Secure the perfect flight for you with the help of the filters. To see the 'Cheapest,' 'Fastest' or 'Best' flights from Washington Dulles International Airport to Tribhuvan International Airport, use the 'Sort by' function. You can also filter by airline, departure and arrival times, and journey duration.

Handy information about Washington Dulles International Airport (IAD)

  • You'll find IAD at 1 Saarinen Circle.

  • 74.39% of flights that depart Washington Dulles International Airport make it to their destination on schedule.

  • Central Washington DC to Washington Dulles International Airport is around 56 kilometres. Depending on traffic, it'll take about 50 minutes to get there if you're driving, catching a cab or ride-sharing.

  • Catching public transport? You can expect a journey time of around 3 hours 25 minutes.

  • Booked an early flight from Washington Dulles International Airport to Tribhuvan International Airport? Avoid the hassle of rushing to the airport (and catch some extra z's) by choosing one of these hotels near IAD:

Arriving at Tribhuvan International Airport (KTM)

  • The last thing you need is a long trip to your hotel if you're landing late on a Washington Dulles International Airport to Tribhuvan International Airport flight. Book one of these accommodation options near KTM instead:

  • Drive into your next adventure with a Tribhuvan International Airport rental car. Book your wheels from Spark Car to explore Kathmandu and beyond.

  • To lock in the lowest price, reserve your vehicle from Tribhuvan International Airport about one week in advance.

Getting from Tribhuvan International Airport (KTM) to central Kathmandu

  • From Tribhuvan International Airport, Kathmandu is approximately 5 kilometres away. It takes around 15 minutes to reach the centre by car.

When to fly to Tribhuvan International Airport (KTM)

  • September is the busiest month for flights from Washington Dulles International Airport to Tribhuvan International Airport. For smaller crowds, travel to Kathmandu in February.

  • Book your flight from Washington Dulles International Airport to Tribhuvan International Airport for June if you'd like to visit Kathmandu during its warmest month. Expect temperatures of between 17ºC (63ºF) and 28ºC (82ºF).

  • Search for cheap tickets from IAD to KTM in January if you like cooler conditions. Temperatures are at their lowest then, ranging between 3ºC (37ºF) and 18ºC (64ºF) on average.

Explore more of Nepal

  • You've visited Kathmandu, now it's time to discover other corners of Nepal. Journey about 145 kilometres north-west to Pokhara to check off its leading sights. From Phewa Lake to Sarangkot and Gupteshwor Mahadev Cave, you'll have a packed itinerary ahead.

  • Around 6 kilometres south of Kathmandu, Patan is another favourite stop in Nepal. Experience the best of this destination with a visit to Aspur Agro Farm, Pimbahaa Pukhoo and Rajib Handicraft.

Plan the rest of your trip from Washington D.C. to Kathmandu

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.