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Kathmandu

$325+ Cheap flights from Washington to Kathmandu (KTM)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/7. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — KTM
Mar 4 — Mar 111
Wed 3/4
Wed 3/11
1 adult, Economy
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Cheap flight deals from Washington to Kathmandu

Cheapest flights from Washington to Kathmandu
Explore the most affordable flight options available from Washington to Kathmandu. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 2, 2026.

This FlightHub deal was found by Cheapflights users on 1/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/1510:15 am
SEA
-
KTM
1 stop22h 30m
Singapore Airlines
Wed 11/1111:05 pm
KTM
-
SEA
1 stop21h 50m
Singapore Airlines
Deal found 1/31$781
This Justfly.com deal was found by Cheapflights users on 1/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/810:15 am
SEA
-
KTM
1 stop22h 30m
Singapore Airlines
Wed 11/1811:05 pm
KTM
-
SEA
1 stop21h 50m
Singapore Airlines
Deal found 1/31$813
This oojo deal was found by Cheapflights users on 2/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1711:45 am
SEA
-
KTM
1 stop21h 15m
Cathay Pacific
Sun 10/411:00 pm
KTM
-
SEA
1 stop23h 50m
Cathay Pacific
Deal found 2/2$874
This KAYAK deal was found by Cheapflights users on 2/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/3111:45 am
SEA
-
KTM
1 stop21h 15m
Cathay Pacific
Wed 5/2711:00 pm
KTM
-
SEA
1 stop23h 50m
Cathay Pacific
Deal found 2/2$902
This Justfly.com deal was found by Cheapflights users on 2/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/510:15 am
SEA
-
KTM
1 stop22h 30m
Singapore Airlines
Fri 5/2210:50 pm
KTM
-
SEA
1 stop22h 40m
Singapore Airlines
Deal found 2/1$912
This FlightHub deal was found by Cheapflights users on 1/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1010:15 am
SEA
-
KTM
1 stop22h 30m
Singapore Airlines
Tue 9/2210:50 pm
KTM
-
SEA
1 stop46h 40m
Singapore Airlines
Deal found 1/31$916
This oojo deal was found by Cheapflights users on 2/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/1410:50 am
SEA
-
KTM
1 stop20h 55m
Cathay Pacific
Wed 11/2510:55 pm
KTM
-
SEA
1 stop24h 00m
Cathay Pacific
Deal found 2/2$924
This KAYAK deal was found by Cheapflights users on 2/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/3111:45 am
SEA
-
KTM
1 stop21h 15m
Cathay Pacific
Fri 5/2911:00 pm
KTM
-
SEA
1 stop23h 50m
Cathay Pacific
Deal found 2/2$959
This Justfly.com deal was found by Cheapflights users on 1/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/38:45 am
SEA
-
KTM
1 stop23h 10m
Singapore Airlines
Wed 3/1811:05 pm
KTM
-
SEA
1 stop21h 50m
Singapore Airlines
Deal found 1/30$967
This Justfly.com deal was found by Cheapflights users on 2/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/1910:15 am
SEA
-
KTM
1 stop22h 30m
Singapore Airlines
Thu 5/710:50 pm
KTM
-
SEA
1 stop22h 40m
Singapore Airlines
Deal found 2/1$974
This KAYAK deal was found by Cheapflights users on 2/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/3011:45 am
SEA
-
KTM
1 stop21h 15m
Cathay Pacific
Wed 5/2711:00 pm
KTM
-
SEA
1 stop23h 50m
Cathay Pacific
Deal found 2/2$977
This Qatar Airways deal was found by Cheapflights users on 1/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Qatar Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/71:52 pm
PDX
-
KTM
2 stops29h 18m
Qatar Airways
Sat 5/166:15 pm
KTM
-
PDX
2 stops40h 04m
Qatar Airways
Deal found 1/31$1,161

Find flight deals from Washington to Kathmandu

Keep the following information in mind while searching for Washington to Kathmandu flight deals. Data was last updated February 2, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$967
(Justfly.com)

One-way from

$325
(FlightHub)

Popular in

June

Cheapest in

February

Average price

$1,141
Provider with most accurate pricing for Seattle/Tacoma Intl-Kathmandu Tribhuvan flight deals.
Search Deals
Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Kathmandu Tribhuvan flights.
Search Deals
From Washington to Kathmandu Tribhuvan
Search Deals
One-way flight from Washington to Kathmandu Tribhuvan
Search Deals
Highest demand for flights based on searches. 5% potential increase in price ($79 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($16 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Washington to Kathmandu that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated February 2, 2026.
Use the filters below to find and compare flights from Washington to Kathmandu that are best for you.

Fly from

Washington

Fly to

Kathmandu

Route

Depart

Return

Price

SeattleKathmandu

SEA - KTM

SEAKTM

Seattle/Tacoma Intl

Wed 4/1

6:59 pm-9:45 pm

2 stops38h 01m

Kathmandu Tribhuvan

Wed 5/27

11:00 pm-10:05 am

1 stop23h 50m

$1,000

SeattleKathmandu

SEA - KTM

SEAKTM

Seattle/Tacoma Intl

Thu 4/2

8:10 am-9:45 pm

2 stops48h 50m

Kathmandu Tribhuvan

Tue 5/26

11:00 pm-10:05 am

1 stop23h 50m

$1,000

SeattleKathmandu

SEA - KTM

SEAKTM

Seattle/Tacoma Intl

Mon 3/30

8:10 am-9:45 pm

2 stops48h 50m

Kathmandu Tribhuvan

Tue 5/26

11:00 pm-10:05 am

1 stop23h 50m

$1,000

SeattleKathmandu

SEA - KTM

SEAKTM

Seattle/Tacoma Intl

Tue 3/31

8:10 am-9:45 pm

2 stops48h 50m

Kathmandu Tribhuvan

Wed 5/27

11:00 pm-10:05 am

1 stop23h 50m

$1,000

SeattleKathmandu

SEA - KTM

SEAKTM

Seattle/Tacoma Intl

Mon 3/30

2:53 pm-9:45 pm

2 stops42h 07m

Kathmandu Tribhuvan

Wed 5/27

11:00 pm-10:05 am

1 stop23h 50m

$1,000

SeattleKathmandu

SEA - KTM

SEAKTM

Seattle/Tacoma Intl

Tue 3/3

7:00 pm-11:10 am

1 stop26h 25m

Kathmandu Tribhuvan

Tue 3/10

12:35 pm-7:03 pm

2 stops43h 13m

$1,004

SeattleKathmandu

SEA - KTM

SEAKTM

Seattle/Tacoma Intl

Sun 3/29

8:08 pm-9:45 pm

2 stops60h 52m

Kathmandu Tribhuvan

Tue 5/26

11:00 pm-10:05 am

1 stop23h 50m

$1,005

SeattleKathmandu

SEA - KTM

SEAKTM

Seattle/Tacoma Intl

Sun 3/1

7:00 pm-11:10 am

1 stop26h 25m

Kathmandu Tribhuvan

Sun 3/8

12:35 pm-6:03 pm

2 stops67h 13m

$1,011

SeattleKathmandu

SEA - KTM

SEAKTM

Seattle/Tacoma Intl

Tue 3/31

11:45 am-9:45 pm

1 stop21h 15m

Kathmandu Tribhuvan

Sat 5/30

11:00 pm-11:05 pm

2 stops60h 50m

$1,017

SeattleKathmandu

SEA - KTM

SEAKTM

Seattle/Tacoma Intl

Sun 3/1

7:29 pm-9:30 pm

2 stops60h 16m

Kathmandu Tribhuvan

Mon 3/30

11:00 pm-10:42 pm

2 stops36h 27m

$1,023

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/1

Showing 1-10 of 42 results
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Best time to book a flight from Washington to Kathmandu

Have a flexible travel schedule? Discover the best time to fly to Kathmandu from Washington with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Washington to Kathmandu

What is the cheapest month to book a flight from State of Washington to Kathmandu?

Currently, August is the cheapest month in which you can book a flight from State of Washington to Kathmandu (average of $868). Flying from State of Washington to Kathmandu in June is currently the most expensive (average of $1,223). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Related info for your journey

Find useful and relevant information for your journey from Washington to Kathmandu. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Kathmandu from Washington?

    Located just 2.5 mi from the city center, Kathmandu Tribhuvan (KTM) is the airport most travelers will use when flying to Kathmandu from Washington.

  • How long is the flight from State of Washington to Kathmandu?

    Cathay Pacific and Qatar Airways can get you from State of Washington to Kathmandu in just under 35h 05m. Your travel time can differ by up to 2h 56m. The distance from State of Washington to Kathmandu is about 7073 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines to fly from State of Washington to Kathmandu one-way?

    For one-way options, check prices for Singapore Airlines. According to our data, you can fly for as low as $325. Users have also found prices from $619 and $734 on Qatar Airways and Turkish Airlines, respectively.

  • What are the most popular routes from State of Washington to Kathmandu?

    The most popular flight routes from State of Washington to Kathmandu are Seattle/Tacoma Intl - Kathmandu Tribhuvan, Portland - Kathmandu Tribhuvan and Spokane - Kathmandu Tribhuvan.

  • Can I find deals for flights from Washington to Kathmandu that include hotel bookings?

    Yes. In addition to deals on Washington to Kathmandu flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Washington to Kathmandu?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Washington to Kathmandu.

  • Can I find deals for business class flights from Washington to Kathmandu?

    Yes. Cheapflights offers flight deals from Washington to Kathmandu by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from State of Washington to Kathmandu?

    Currently, August is the cheapest month in which you can book a flight from State of Washington to Kathmandu (average of $868). Flying from State of Washington to Kathmandu in June is currently the most expensive (average of $1,223). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Kathmandu?

Book flights to Kathmandu if you plan to visit one of these locations
Nagarkot

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Alternative routes for Washington to Kathmandu

See prices for flight routes from nearby airports that may be better suited for you.
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Top 5 airlines flying from Washington to Kathmandu

Discover the top 5 airlines that operate flights from Washington to Kathmandu. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated February 2, 2026.
AirlineCheapestAverageFlexibilityOn-time
Singapore AirlinesCheapest$896Average$1,368FlexibilityNo cancel feeOn-time81%
Qatar AirwaysCheapest$984Average$1,589FlexibilityNo cancel feeOn-time68%
Turkish AirlinesCheapest$1,003Average$1,334FlexibilityNo cancel feeOn-time77%
Cathay PacificCheapest$1,034Average$1,409FlexibilityNo cancel feeOn-time72%
EmiratesCheapest$1,138Average$1,341FlexibilityNo cancel feeOn-time75%

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