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Kathmandu

$459+ Cheap flights from Seattle (SEA) 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 2/8. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — KTM
Jan 25 — Feb 11
Sun 1/25
Sun 2/1
1 adult, Economy
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Cheap flight deals from Seattle to Kathmandu

Cheapest flights from Seattle to Kathmandu
Explore the most affordable flight options available from Seattle to Kathmandu. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 26, 2025.

This Mytrip deal was found by Cheapflights users on 12/24. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/2912:10 amSEA - KTM
3 stops32h 35mMultiple Airlines
Tue 1/610:55 pmKTM - SEA
2 stops33h 30mMultiple Airlines
Deal found 12/24$1,760
This Ovago deal was found by Cheapflights users on 12/24. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/303:49 pmSEA - KTM
2 stops39h 56mCathay Pacific
Sun 1/410:55 pmKTM - SEA
2 stops53h 17mCathay Pacific
Deal found 12/24$2,319
This FlightHub deal was found by Cheapflights users on 12/24. 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.
Tue 12/304:05 pmSEA - KTM
1 stop26h 05mQatar Airways
Tue 1/65:40 pmKTM - SEA
1 stop31h 45mQatar Airways
Deal found 12/24$2,359
This Justfly.com deal was found by Cheapflights users on 12/26. 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 12/303:49 pmSEA - KTM
2 stops39h 56mMultiple Airlines
Sun 1/410:55 pmKTM - SEA
2 stops29h 21mMultiple Airlines
Deal found 12/26$2,677
This oojo deal was found by Cheapflights users on 12/24. 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.
Tue 12/304:05 pmSEA - KTM
1 stop26h 05mQatar Airways
Sun 1/47:05 pmKTM - SEA
2 stops40h 57mQatar Airways
Deal found 12/24$2,842

Find flight deals from Seattle to Kathmandu

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Kathmandu (KTM). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated December 26, 2025.

Most accurate provider

Justfly.com
3 stars

Most trusted provider

Justfly.com
3 stars

Round-trip from

$893
(oojo)

One-way from

$459
(Kiwi.com)

Popular in

June

Cheapest in

October

Average price

$1,490
Provider with most accurate pricing for Seattle/Tacoma Intl-Kathmandu Tribhuvan flight deals.
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Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Kathmandu Tribhuvan flights.
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From Seattle/Tacoma Intl to Kathmandu Tribhuvan
Search Deals
One-way flight from Seattle/Tacoma Intl to Kathmandu Tribhuvan
Search Deals
Highest demand for flights based on searches. 6% potential increase in price ($89 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($21 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Seattle 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 December 26, 2025.
Use the filters below to find and compare flights from Seattle to Kathmandu that are best for you.

Fly from

Seattle

Fly to

Kathmandu

Route

Depart

Return

Price

SeattleKathmandu

SEA - KTM

SEAKTM

Seattle/Tacoma Intl

Tue 2/3

8:25 am-5:50 pm

2 stops43h 40m

Kathmandu Tribhuvan

Thu 2/19

9:10 am-9:48 pm

2 stops50h 23m

$1,026

SeattleKathmandu

SEA - KTM

SEAKTM

Seattle/Tacoma Intl

Thu 4/30

11:50 am-9:45 pm

1 stop21h 10m

Kathmandu Tribhuvan

Mon 5/4

11:00 pm-10:10 am

1 stop23h 55m

$1,034

SeattleKathmandu

SEA - KTM

SEAKTM

Seattle/Tacoma Intl

Tue 1/6

5:59 pm-9:30 pm

2 stops37h 46m

Kathmandu Tribhuvan

Wed 5/6

11:00 pm-8:50 pm

2 stops34h 35m

$1,047

SeattleKathmandu

SEA - KTM

SEAKTM

Seattle/Tacoma Intl

Fri 3/27

9:45 am-9:45 pm

1 stop47h 15m

Kathmandu Tribhuvan

Mon 4/13

10:50 pm-8:45 am

1 stop22h 40m

$1,048

SeattleKathmandu

SEA - KTM

SEAKTM

Seattle/Tacoma Intl

Mon 3/2

7:55 pm-9:30 pm

2 stops59h 50m

Kathmandu Tribhuvan

Sun 3/29

11:00 pm-10:10 am

1 stop23h 55m

$1,052

SeattleKathmandu

SEA - KTM

SEAKTM

Seattle/Tacoma Intl

Wed 1/14

3:57 pm-9:30 pm

2 stops39h 48m

Kathmandu Tribhuvan

Mon 6/22

11:00 pm-10:13 am

2 stops47h 58m

$1,071

SeattleKathmandu

SEA - KTM

SEAKTM

Seattle/Tacoma Intl

Mon 5/11

8:41 am-9:45 pm

2 stops48h 19m

Kathmandu Tribhuvan

Fri 5/22

11:00 pm-10:10 am

1 stop23h 55m

$1,074

SeattleKathmandu

SEA - KTM

SEAKTM

Seattle/Tacoma Intl

Mon 3/2

7:55 pm-9:30 pm

2 stops59h 50m

Kathmandu Tribhuvan

Fri 4/3

11:00 pm-10:10 am

1 stop23h 55m

$1,074

SeattleKathmandu

SEA - KTM

SEAKTM

Seattle/Tacoma Intl

Thu 1/15

3:45 pm-9:30 pm

2 stops40h 00m

Kathmandu Tribhuvan

Fri 6/19

11:00 pm-10:35 am

1 stop24h 20m

$1,080

SeattleKathmandu

SEA - KTM

SEAKTM

Seattle/Tacoma Intl

Wed 1/14

7:55 pm-9:30 pm

2 stops35h 50m

Kathmandu Tribhuvan

Mon 6/22

11:00 pm-10:13 am

2 stops47h 58m

$1,084

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/25

Showing 1-10 of 21 results
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Compare providers for flights from Seattle to Kathmandu

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Seattle to Kathmandu in December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*3 stars
CheapfaremartPrice Accuracy-Trust Score*1 star
OvagoPrice Accuracy2 starsTrust Score*2 stars
Trip.comPrice Accuracy2 starsTrust Score*3 stars
Justfly.comPrice Accuracy3 starsTrust Score*3 stars
oojoPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Seattle-Kathmandu flights, users find the pricing of Justfly.com to be most consistent on Cheapflights vs. Justfly.com Users can find the same prices on Seattle-Kathmandu flight deals on Cheapflights vs. Justfly.com >95% of the time. Price accuracy is based on data collected from Seattle-Kathmandu flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Seattle-Kathmandu flights, Cheapflights users trust Justfly.com the most. Justfly.com has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Seattle-Kathmandu flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Seattle to Kathmandu

Have a flexible travel schedule? Discover the best time to fly to Kathmandu from Seattle 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 Seattle to Kathmandu

How far ahead should I book a flight from Seattle to Kathmandu?

Use this chart to determine the optimal time to book a round-trip flight from Seattle to Kathmandu. Price data was last updated on December 19, 2025.

Booking 15 days in advance of your planned departure date is, on average, the best time to get cheap flights from Seattle to Kathmandu. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest month to book a flight from Seattle to Kathmandu?

Currently, August is the cheapest month in which you can book a flight from Seattle to Kathmandu (average of $869). Flying from Seattle to Kathmandu in June is currently the most expensive (average of $1,191). 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.

What is the cheapest time of day to fly from SEA to KTM?

Find hourly flight availability from Seattle to Kathmandu. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 26, 2025.

One of the essential ways to save on airfare from Seattle to Kathmandu is to remain as flexible as possible. Flights that are in the evening tend to be the most expensive. A flight at noon could potentially save you up to 31% on airfare.

How much does it cost to fly round-trip from Seattle to Kathmandu?

Reviews of airlines servicing Kathmandu

Get insights into the airlines that provide service to Kathmandu. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Kathmandu. Reviews last updated December 26, 2025.
See what other customers who have flown with Emirates, Singapore Airlines, and Cathay Pacific from Seattle to Kathmandu have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Emirates
8.1
Very good
3,444 reviews

Boarding

8.1

Food

7.9

Overall

8.1

Crew

8.3

Entertainment

8.2

Comfort

8.0

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2024

IAD - DXB

Not so good. Flight was departed 2 hours late from DC and we missed our connecting flight from Dubai to Mumbai. Our flight Dubai to Mumbai got delayed by three hours. Once we arrived Bombay airport we didnot get all our luggage bags. We were missing two luggage bags so found out that our those two luggage bags are coming in different flight. First they gave us wrong flight information in which our missing luggage coming and wrong phone number to whom we should reach out. I spent hours and hours at the airport to find out our luggage bags. After four five hours later and hectic time at the airport to get our luggage bags. Overall poor communication with emirates staff at the airport and no one is helpful.
Emirates
8.1
Very good
3,444 reviews
Emirates
8.1
Very good
3,444 reviews

Boarding

8.1

Food

7.9

Overall

8.1

Crew

8.3

Entertainment

8.2

Comfort

8.0

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2024

IAD - DXB

Not so good. Flight was departed 2 hours late from DC and we missed our connecting flight from Dubai to Mumbai. Our flight Dubai to Mumbai got delayed by three hours. Once we arrived Bombay airport we didnot get all our luggage bags. We were missing two luggage bags so found out that our those two luggage bags are coming in different flight. First they gave us wrong flight information in which our missing luggage coming and wrong phone number to whom we should reach out. I spent hours and hours at the airport to find out our luggage bags. After four five hours later and hectic time at the airport to get our luggage bags. Overall poor communication with emirates staff at the airport and no one is helpful.
Singapore Airlines
8.1
Very good
1,421 reviews
Emirates
8.1
Very good
3,444 reviews

Boarding

8.1

Food

7.9

Overall

8.1

Crew

8.3

Entertainment

8.2

Comfort

8.0

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2024

IAD - DXB

Not so good. Flight was departed 2 hours late from DC and we missed our connecting flight from Dubai to Mumbai. Our flight Dubai to Mumbai got delayed by three hours. Once we arrived Bombay airport we didnot get all our luggage bags. We were missing two luggage bags so found out that our those two luggage bags are coming in different flight. First they gave us wrong flight information in which our missing luggage coming and wrong phone number to whom we should reach out. I spent hours and hours at the airport to find out our luggage bags. After four five hours later and hectic time at the airport to get our luggage bags. Overall poor communication with emirates staff at the airport and no one is helpful.
Cathay Pacific
7.6
Good
1,105 reviews
Emirates
8.1
Very good
3,444 reviews

Boarding

8.1

Food

7.9

Overall

8.1

Crew

8.3

Entertainment

8.2

Comfort

8.0

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2024

IAD - DXB

Not so good. Flight was departed 2 hours late from DC and we missed our connecting flight from Dubai to Mumbai. Our flight Dubai to Mumbai got delayed by three hours. Once we arrived Bombay airport we didnot get all our luggage bags. We were missing two luggage bags so found out that our those two luggage bags are coming in different flight. First they gave us wrong flight information in which our missing luggage coming and wrong phone number to whom we should reach out. I spent hours and hours at the airport to find out our luggage bags. After four five hours later and hectic time at the airport to get our luggage bags. Overall poor communication with emirates staff at the airport and no one is helpful.
Qatar Airways
7.4
Good
3,692 reviews
Emirates
8.1
Very good
3,444 reviews

Boarding

8.1

Food

7.9

Overall

8.1

Crew

8.3

Entertainment

8.2

Comfort

8.0

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2024

IAD - DXB

Not so good. Flight was departed 2 hours late from DC and we missed our connecting flight from Dubai to Mumbai. Our flight Dubai to Mumbai got delayed by three hours. Once we arrived Bombay airport we didnot get all our luggage bags. We were missing two luggage bags so found out that our those two luggage bags are coming in different flight. First they gave us wrong flight information in which our missing luggage coming and wrong phone number to whom we should reach out. I spent hours and hours at the airport to find out our luggage bags. After four five hours later and hectic time at the airport to get our luggage bags. Overall poor communication with emirates staff at the airport and no one is helpful.
Turkish Airlines
7.3
Good
4,115 reviews
Emirates
8.1
Very good
3,444 reviews

Boarding

8.1

Food

7.9

Overall

8.1

Crew

8.3

Entertainment

8.2

Comfort

8.0

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2024

IAD - DXB

Not so good. Flight was departed 2 hours late from DC and we missed our connecting flight from Dubai to Mumbai. Our flight Dubai to Mumbai got delayed by three hours. Once we arrived Bombay airport we didnot get all our luggage bags. We were missing two luggage bags so found out that our those two luggage bags are coming in different flight. First they gave us wrong flight information in which our missing luggage coming and wrong phone number to whom we should reach out. I spent hours and hours at the airport to find out our luggage bags. After four five hours later and hectic time at the airport to get our luggage bags. Overall poor communication with emirates staff at the airport and no one is helpful.

Related info for your journey

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

  • How long is the flight from Seattle to Kathmandu?

    Singapore Airlines, Qatar Airways, and Cathay Pacific can get you from Seattle to Kathmandu in just under 22h 45m. Your travel time can differ by up to 27h. The distance between Seattle and Kathmandu is about 6962 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines flying from Seattle to Kathmandu round-trip?

    Singapore Airlines, at $898, was found to be the cheapest airline from Seattle to Kathmandu.Alternate airlines to your destination round-trip include Qatar Airways and Turkish Airlines. Singapore Airlines is 32% cheaper than the average price of flights available within the next 90 days to this destination.

  • What are the cheapest airlines to fly from Seattle to Kathmandu one-way?

    $307 is the cheapest one-way deal found within the past few days, from Singapore Airlines. You may also be able to find cheap deals on Qatar Airways and Turkish Airlines, with prices starting from $619 and $734, respectively.

  • Where are the most common layover locations when flying from Seattle to Kathmandu?

    Flights departing from Seattle and landing in Kathmandu layover in Singapore most frequently. Istanbul is the second most popular location for layovers on flights from Seattle to Kathmandu.

  • What are some popular things to do or see while on a layover in Singapore?

    Singapore travelers tend to visit Sentosa, Universal Studios Singapore, and Geylang Serai New Market more than anywhere else. Travelers on a layover in Singapore can visit Sentosa, Universal Studios Singapore, and Geylang Serai New Market, by traveling 13.4 mi, 13.4 mi, and 6.9 mi, respectively after landing at Singapore Changi. Those landing in Singapore looking to spend some time exploring during their layover can rent a car for about $85 per day.

  • What are some popular points of interest to see during a layover in Istanbul?

    Taksim Square, Beyazit Meydani, and Laleli Camii are the most popular attractions in Istanbul if you're in need of something to do during your layover. Taksim Square, Beyazit Meydani, and Laleli Camii can be accessed by traveling approximately 20.8 mi, 21.7 mi, and 21.5 mi, respectively from Istanbul. Those on a layover in Istanbul in need of a rental car can book one at Istanbul for about $31.

  • Where are the least popular layover locations for Seattle to Kathmandu flights?

    Seattle to Kathmandu flights have a layover in Doha least often.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Seattle 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 Seattle to Kathmandu?

    Currently, August is the cheapest month in which you can book a flight from Seattle to Kathmandu (average of $869). Flying from Seattle to Kathmandu in June is currently the most expensive (average of $1,191). 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 Seattle to Kathmandu

See prices for flight routes from nearby airports that may be better suited for you.
Portland to Kathmandu flights
Spokane to Kathmandu flights
Pullman to Kathmandu flights

Top 5 airlines flying from Seattle to Kathmandu

Discover the top 5 airlines that operate flights from Seattle 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 December 26, 2025.
AirlineCheapestAverageFlexibilityOn-time
Singapore AirlinesCheapest$898Average$1,194FlexibilityNo cancel feeOn-time81%
Qatar AirwaysCheapest$984Average$1,598FlexibilityNo cancel feeOn-time68%
Turkish AirlinesCheapest$1,020Average$1,355FlexibilityNo cancel feeOn-time77%
Cathay PacificCheapest$1,034Average$1,276FlexibilityNo cancel feeOn-time72%
EmiratesCheapest$1,138Average$1,341FlexibilityNo cancel feeOn-time75%

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