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Kathmandu

$359+ 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 5/9. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — KTM
Apr 28 — May 51
Tue 4/28
Tue 5/5
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 March 29, 2026.

This Gurufare deal was found by Cheapflights users on 3/26. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/2410:15 am
SEA
-
KTM
1 stop22h 30m
Singapore Airlines
Mon 10/1911:10 pm
KTM
-
SEA
1 stop22h 20m
Singapore Airlines
Deal found 3/26$756
This oojo deal was found by Cheapflights users on 3/24. 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.
Fri 9/1110:15 am
SEA
-
KTM
1 stop22h 30m
Multiple Airlines
Sun 9/2710:50 pm
KTM
-
SEA
2 stops37h 08m
Multiple Airlines
Deal found 3/24$787
This Justfly.com deal was found by Cheapflights users on 3/28. 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 8/610:15 am
SEA
-
KTM
1 stop22h 30m
Singapore Airlines
Thu 9/1010:50 pm
KTM
-
SEA
1 stop22h 40m
Singapore Airlines
Deal found 3/28$845
This FlightHub deal was found by Cheapflights users on 3/26. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/2010:15 am
SEA
-
KTM
1 stop22h 30m
Singapore Airlines
Wed 11/411:05 pm
KTM
-
SEA
1 stop21h 50m
Singapore Airlines
Deal found 3/26$869
This oojo deal was found by Cheapflights users on 3/27. 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 8/2510:15 am
SEA
-
KTM
1 stop22h 30m
Multiple Airlines
Wed 9/2311:10 pm
KTM
-
SEA
3 stops36h 21m
Multiple Airlines
Deal found 3/27$910
This oojo deal was found by Cheapflights users on 3/25. 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 8/2510:15 am
SEA
-
KTM
1 stop22h 30m
Singapore Airlines
Tue 9/2910:50 pm
KTM
-
SEA
1 stop46h 40m
Singapore Airlines
Deal found 3/25$921
This oojo deal was found by Cheapflights users on 3/24. 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.
Fri 9/1110:15 am
SEA
-
KTM
1 stop22h 30m
Singapore Airlines
Sun 9/2710:50 pm
KTM
-
SEA
1 stop46h 40m
Singapore Airlines
Deal found 3/24$932
This oojo deal was found by Cheapflights users on 3/28. 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 8/64:17 pm
SEA
-
KTM
2 stops40h 28m
Multiple Airlines
Thu 9/1010:50 pm
KTM
-
SEA
1 stop22h 40m
Multiple Airlines
Deal found 3/28$941
This oojo deal was found by Cheapflights users on 3/25. 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.
Sun 9/2710:15 am
SEA
-
KTM
1 stop22h 30m
Multiple Airlines
Tue 10/1310:50 pm
KTM
-
SEA
2 stops34h 59m
Multiple Airlines
Deal found 3/25$944
This oojo deal was found by Cheapflights users on 3/27. 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 8/2510:15 am
SEA
-
KTM
1 stop22h 30m
Singapore Airlines
Wed 9/2311:10 pm
KTM
-
SEA
1 stop46h 20m
Singapore Airlines
Deal found 3/27$945
This Justfly.com deal was found by Cheapflights users on 3/28. 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 9/310:15 am
SEA
-
KTM
1 stop22h 30m
Singapore Airlines
Fri 9/1811:10 pm
KTM
-
SEA
1 stop22h 20m
Singapore Airlines
Deal found 3/28$946
This Indian Eagle deal was found by Cheapflights users on 3/24. 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 Indian Eagle is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/64:25 pm
SEA
-
KTM
1 stop27h 40m
Qatar Airways
Fri 9/116:00 pm
KTM
-
SEA
1 stop31h 10m
Qatar Airways
Deal found 3/24$982

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 March 29, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$756
(Gurufare)

One-way from

$359
(FlightHub)

Popular in

July

Cheapest in

February

Average price

$1,278
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 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. 9% potential increase in price ($140 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($24 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
Search Deals

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 March 29, 2026.
Use the filters below to find and compare flights from Seattle to Kathmandu that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleKathmandu

SEA - KTM

SEAKTM

Seattle/Tacoma Intl

Wed 5/6

4:30 pm-5:00 pm

1 stop35h 45m

Kathmandu Tribhuvan

Sun 5/24

10:55 am-12:45 pm

1 stop38h 35m

$1,164

SeattleKathmandu

SEA - KTM

SEAKTM

Seattle/Tacoma Intl

Thu 9/3

4:25 pm-9:50 am

1 stop28h 40m

Kathmandu Tribhuvan

Mon 9/7

6:00 pm-12:25 pm

1 stop31h 10m

$1,205
Quickest round-trip

SeattleKathmandu

SEA - KTM

SEAKTM

Seattle/Tacoma Intl

Sun 9/6

7:10 pm-6:15 am

1 stop22h 20m

Kathmandu Tribhuvan

Thu 9/10

7:40 am-5:15 pm

1 stop22h 20m

$1,224

SeattleKathmandu

SEA - KTM

SEAKTM

Seattle/Tacoma Intl

Sun 5/3

4:30 pm-5:00 pm

1 stop35h 45m

Kathmandu Tribhuvan

Sun 6/14

6:00 pm-12:25 pm

1 stop31h 10m

$1,276

SeattleKathmandu

SEA - KTM

SEAKTM

Seattle/Tacoma Intl

Tue 5/5

4:30 pm-5:00 pm

1 stop35h 45m

Kathmandu Tribhuvan

Sun 6/14

6:00 pm-12:25 pm

1 stop31h 10m

$1,276

SeattleKathmandu

SEA - KTM

SEAKTM

Seattle/Tacoma Intl

Sun 9/6

7:00 am-9:50 am

2 stops38h 05m

Kathmandu Tribhuvan

Thu 9/10

6:00 pm-12:25 pm

1 stop31h 10m

$1,380
Cheapest one-way
Quickest one-way

SeattleKathmandu

SEA - KTM

SEAKTM

Seattle/Tacoma Intl

Sun 8/30

10:15 am-9:30 pm

1 stop22h 30m

$382

SeattleKathmandu

SEA - KTM

SEAKTM

Seattle/Tacoma Intl

Sun 4/26

9:45 am-12:50 pm

2 stops38h 20m

$493

SeattleKathmandu

SEA - KTM

SEAKTM

Seattle/Tacoma Intl

Mon 4/27

4:30 pm-5:00 pm

1 stop35h 45m

$525

SeattleKathmandu

SEA - KTM

SEAKTM

Seattle/Tacoma Intl

Thu 4/16

4:30 pm-5:00 pm

1 stop35h 45m

$525

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/27

Showing 1-10 of 16 resultsSorted by cheapest first
1
2

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 March.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice Accuracy2 starsTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*2 stars
CheapfaremartPrice Accuracy-Trust Score*1 star
Trip.comPrice Accuracy1 starTrust 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 FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Seattle-Kathmandu flight deals on Cheapflights vs. FlightHub >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 FlightHub the most. FlightHub 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 March 13, 2026.

Booking 88 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, October is the cheapest month in which you can book a flight from Seattle to Kathmandu (average of $818). Flying from Seattle to Kathmandu in June is currently the most expensive (average of $1,133). 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.

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 March 29, 2026.
See what other customers who have flown with Singapore Airlines,Emirates, andCathay 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.
Singapore Airlines
8.2
Very good
1,484 reviews

Food

7.8

Comfort

8.0

Boarding

8.3

Overall

8.2

Entertainment

8.0

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Juliet,Oct 2025

PUS - SIN

Very kind staff to arrange my luggage and really appreciate all help.
Singapore Airlines
8.2
Very good
1,484 reviews
Singapore Airlines
8.2
Very good
1,484 reviews

Food

7.8

Comfort

8.0

Boarding

8.3

Overall

8.2

Entertainment

8.0

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Juliet,Oct 2025

PUS - SIN

Very kind staff to arrange my luggage and really appreciate all help.
Emirates
8.1
Very good
3,548 reviews
Singapore Airlines
8.2
Very good
1,484 reviews

Food

7.8

Comfort

8.0

Boarding

8.3

Overall

8.2

Entertainment

8.0

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Juliet,Oct 2025

PUS - SIN

Very kind staff to arrange my luggage and really appreciate all help.
Cathay Pacific
7.6
Good
1,232 reviews
Singapore Airlines
8.2
Very good
1,484 reviews

Food

7.8

Comfort

8.0

Boarding

8.3

Overall

8.2

Entertainment

8.0

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Juliet,Oct 2025

PUS - SIN

Very kind staff to arrange my luggage and really appreciate all help.
Qatar Airways
7.4
Good
3,731 reviews
Singapore Airlines
8.2
Very good
1,484 reviews

Food

7.8

Comfort

8.0

Boarding

8.3

Overall

8.2

Entertainment

8.0

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Juliet,Oct 2025

PUS - SIN

Very kind staff to arrange my luggage and really appreciate all help.
Turkish Airlines
7.4
Good
4,286 reviews
Singapore Airlines
8.2
Very good
1,484 reviews

Food

7.8

Comfort

8.0

Boarding

8.3

Overall

8.2

Entertainment

8.0

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Juliet,Oct 2025

PUS - SIN

Very kind staff to arrange my luggage and really appreciate all help.

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?

    Qatar Airways and Turkish Airlines can get you from Seattle to Kathmandu in just under 22h 20m. Your travel time can differ by up to 13h 25m. 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 $813, was found to be the cheapest airline from Seattle to Kathmandu.Alternate airlines to your destination round-trip include Cathay Pacific and Turkish Airlines. Singapore Airlines is 37% 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?

    $325 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 $517 and $741, 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 Merlion more than anywhere else. Travelers on a layover in Singapore can visit Sentosa, Universal Studios Singapore, and Merlion, by traveling 13.4 mi, 13.4 mi, and 10.5 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 $99 per day.

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

    Taksim Square, Laleli Camii, and Beyazit Meydani are the most popular attractions in Istanbul if you're in need of something to do during your layover. Taksim Square, Laleli Camii, and Beyazit Meydani can be accessed by traveling approximately 20.8 mi, 21.5 mi, and 21.7 mi, respectively from Istanbul. Those on a layover in Istanbul in need of a rental car can book one at Istanbul for about $32.

  • 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, October is the cheapest month in which you can book a flight from Seattle to Kathmandu (average of $818). Flying from Seattle to Kathmandu in June is currently the most expensive (average of $1,133). 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 March 29, 2026.
AirlineCheapestAverageFlexibilityOn-time
Singapore AirlinesCheapest$813Average$1,204FlexibilityNo cancel feeOn-time81%
Cathay PacificCheapest$903Average$1,188FlexibilityNo cancel feeOn-time72%
Turkish AirlinesCheapest$979Average$1,356FlexibilityNo cancel feeOn-time77%
Qatar AirwaysCheapest$984Average$1,524FlexibilityNo cancel feeOn-time68%
EmiratesCheapest$1,138Average$1,341FlexibilityNo cancel feeOn-time75%

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