£352 Cheap Flights from Seattle (SEA) to Kathmandu (KTM)

View £352 flight on Fri, 11 Sept 2026Opens in a new window

Popular airlines from Seattle-Tacoma International Airport (SEA) to Tribhuvan Intl. Airport (KTM)

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Cheap Flights from Seattle (SEA) to Kathmandu (KTM)

Prices were available within the past 7 days and start at £352 for one-way flights and £917 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Qatar Airways
Sat, 12 Sept - Tue, 29 Sept
SEA
Seattle
KTM
Kathmandu
£917 Return, found 2 days ago
£917
Return
found 2 days ago
Select Qatar Airways flight, departing Sat, 12 Sept from Seattle to Kathmandu, returning Tue, 29 Sept, priced at £917 found 2 days ago
Qatar Airways
Sat, 12 Sept - Tue, 29 Sept
SEA
Seattle
KTM
Kathmandu
£919 Return, found 2 days ago
£919
Return
found 2 days ago
Select Qatar Airways flight, departing Sat, 12 Sept from Seattle to Kathmandu, returning Tue, 29 Sept, priced at £919 found 2 days ago
Alaska Airlines
Sat, 12 Sept - Tue, 29 Sept
SEA
Seattle
KTM
Kathmandu
£925 Return, found 2 days ago
£925
Return
found 2 days ago
Select Alaska Airlines flight, departing Sat, 12 Sept from Seattle to Kathmandu, returning Tue, 29 Sept, priced at £925 found 2 days ago
Alaska Airlines
Sat, 12 Sept - Tue, 29 Sept
SEA
Seattle
KTM
Kathmandu
£927 Return, found 2 days ago
£927
Return
found 2 days ago
Select Alaska Airlines flight, departing Sat, 12 Sept from Seattle to Kathmandu, returning Tue, 29 Sept, priced at £927 found 2 days ago
Cathay Pacific
Sat, 12 Sept - Tue, 29 Sept
SEA
Seattle
KTM
Kathmandu
£928 Return, found 2 days ago
£928
Return
found 2 days ago
Select Cathay Pacific flight, departing Sat, 12 Sept from Seattle to Kathmandu, returning Tue, 29 Sept, priced at £928 found 2 days ago
Qatar Airways
Sat, 12 Sept - Mon, 28 Sept
SEA
Seattle
KTM
Kathmandu
£929 Return, found 2 days ago
£929
Return
found 2 days ago
Select Qatar Airways flight, departing Sat, 12 Sept from Seattle to Kathmandu, returning Mon, 28 Sept, priced at £929 found 2 days ago
Qatar Airways
Sat, 12 Sept - Mon, 28 Sept
SEA
Seattle
KTM
Kathmandu
£931 Return, found 2 days ago
£931
Return
found 2 days ago
Select Qatar Airways flight, departing Sat, 12 Sept from Seattle to Kathmandu, returning Mon, 28 Sept, priced at £931 found 2 days ago
Alaska Airlines
Sat, 12 Sept - Mon, 28 Sept
SEA
Seattle
KTM
Kathmandu
£936 Return, found 2 days ago
£936
Return
found 2 days ago
Select Alaska Airlines flight, departing Sat, 12 Sept from Seattle to Kathmandu, returning Mon, 28 Sept, priced at £936 found 2 days ago
Singapore Airlines
Sat, 12 Sept - Mon, 28 Sept
SEA
Seattle
KTM
Kathmandu
£936 Return, found 2 days ago
£936
Return
found 2 days ago
Select Singapore Airlines flight, departing Sat, 12 Sept from Seattle to Kathmandu, returning Mon, 28 Sept, priced at £936 found 2 days ago
Turkish Airlines
Sun, 1 Nov - Wed, 18 Nov
SEA
Seattle
KTM
Kathmandu
£1,134 Return, found 2 days ago
£1,134
Return
found 2 days ago
Select Turkish Airlines flight, departing Sun, 1 Nov from Seattle to Kathmandu, returning Wed, 18 Nov, priced at £1,134 found 2 days ago

Frequently asked questions

How much is a flight from Seattle - Tacoma Intl. Airport (SEA) to KTM?
Round-trip journeys between Sea-Tac Airport and Tribhuvan Intl. Airport start from £917. This price is based on fares listed within the last 7 days on Expedia for flights departing within the next year — make your booking ASAP so you don't miss out. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from Seattle - Tacoma Intl. Airport (SEA) to Tribhuvan Intl. Airport (KTM)?
Most flights can be cancelled online, but whether or not you incur a fee all comes down to your airline. If you do have to cancel your trip, follow the instructions in the Customer Service Portal.
How do I find cheap flights from Seattle - Tacoma Intl. Airport (SEA) to Tribhuvan Intl. Airport (KTM) that have flexible change policies?
Many airlines offer the option to reschedule your flight without a change fee. All you pay is the difference between the original flight and the new flight. When you're searching for SEA to Tribhuvan Intl. Airport flights, you'll see a "no change fees" filter for you to select.
How far is the flight from SEA to Tribhuvan Intl. Airport (KTM)?
You'll have 11,200 kilometres to cover on the long-haul SeaTac to Kathmandu route. Dress in layers of comfortable clothes and consider taking a neck pillow with you.
Which airlines fly direct from Seattle - Tacoma Intl. Airport (SEA) to Tribhuvan Intl. Airport?
Flying nonstop between Sea-Tac Airport and KTM isn't possible at present. However, you'll still be able to find a flight to Kathmandu with at least one stop.
Are Seattle - Tacoma Intl. Airport (SEA) to Tribhuvan Intl. Airport flight tickets cheaper when they're purchased at the last minute?
Booking your trip from SEA to Tribhuvan Intl. Airport last minute could save you some cash. However, it could end up costing a great deal more! If you'd rather not take any chances, book well ahead of your departure date. In fact, Expedia has some of the biggest bargains up to 12 months in advance. If your preferred air carrier hasn't released tickets yet, check back frequently as deals are updated on Expedia all the time.

Frequently asked questions

How do I find cheap flights from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Kathmandu (KTM-Tribhuvan Intl.)?
To find a cheap flight from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Kathmandu (KTM-Tribhuvan Intl.), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best time to fly from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Kathmandu (KTM-Tribhuvan Intl.)?
The best time to fly is usually mid-week (Tuesday or Wednesday) and during early morning hours as flights tend to be cheaper, less crowded, and generally more on-time. Avoid major holidays and peak vacation seasons for smoother travel. Combining off-peak days and hours often gives the best combination of cost, comfort, and convenience.
How many flights per day from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Kathmandu (KTM-Tribhuvan Intl.)?
There are approximately 67 connecting flights per day from Seattle - Tacoma Intl. (SEA) to Tribhuvan Intl. (KTM). Some common connection points include San Francisco Intl. (SFO), Los Angeles Intl. (LAX), and Vancouver Intl. (YVR).
What is the earliest flight from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Kathmandu (KTM-Tribhuvan Intl.)?
The earliest flight from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Kathmandu (KTM-Tribhuvan Intl.) typically departs at approximately 12:05 AM local time. This service is operated by Alaska Airlines and Air India and is seasonal, active in May and June. An early departure like this can help you maximise your time at your destination. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What day of the week has the most flights from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Kathmandu (KTM-Tribhuvan Intl.)?
You'll typically find the most flights from Seattle - Tacoma Intl. (SEA) to Tribhuvan Intl. (KTM) on a Thursday, with around 61 flights available. This gives you a good selection of options for your journey. Major airlines on this route include Alaska Airlines, Qatar Airways, and United Airlines. Flight schedules are consistent throughout the week, so you'll find similar options on other days.
What are the most popular departure times for flights from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Kathmandu (KTM-Tribhuvan Intl.)?
The most popular departure times for flights from Seattle - Tacoma Intl. (SEA) to Tribhuvan Intl. (KTM) are in the afternoon, from 3pm to 6pm. About 31% of passengers prefer this time window. Many major carriers, including Emirates, Qatar Airways and Alaska Airlines, offer flights during this window. These times work well because you can get an early start on your journey and arrive at your destination with time to settle in.
How long does it take to fly from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Kathmandu (KTM-Tribhuvan Intl.)?
A flight from SEA to KTM with a layover takes around 22 hours 20 minutes, with the route covering approximately 6,967 miles. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Kathmandu (KTM-Tribhuvan Intl.)?
Select the "Business class" and "First class" filters when looking for SEA to KTM flights on Expedia. This is the easiest way to compare prices, routes and flight times for your trip.
How do I earn miles on a Seattle, WA (SEA-Seattle - Tacoma Intl.) to Kathmandu (KTM-Tribhuvan Intl.) flight with Expedia?
It's easy to earn miles on a Seattle, WA (SEA-Seattle - Tacoma Intl.) to Kathmandu (KTM-Tribhuvan Intl.) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia. *Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for Kathmandu from Seattle - Tacoma Intl. (SEA)?
From Seattle - Tacoma Intl. (SEA), you can fly directly into Tribhuvan Intl. (KTM) to reach Kathmandu. Some flights may connect through major hubs like San Francisco Intl. (SFO), Los Angeles Intl. (LAX), Heathrow (LHR) before reaching Kathmandu. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Kathmandu (KTM-Tribhuvan Intl.) at the last minute?
Typically, booking a last minute flight from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Kathmandu (KTM-Tribhuvan Intl.) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Seattle, WA (SEA-Seattle - Tacoma Intl.) to Kathmandu (KTM-Tribhuvan Intl.) flight and hotel package?
Securing a Seattle, WA (SEA-Seattle - Tacoma Intl.) to Kathmandu (KTM-Tribhuvan Intl.) flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Kathmandu (KTM-Tribhuvan Intl.)?
If you booked your Seattle, WA (SEA-Seattle - Tacoma Intl.) to Kathmandu (KTM-Tribhuvan Intl.) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
Seattle - Tacoma Intl.
Destination airport
Tribhuvan Intl.
Return price
£917
Distance
11146 km

Book with confidence

Compare flights from Seattle to Kathmandu easily and book with confidence

For travelling on business or for pleasure, Expedia makes it easy to book your flights from Seattle to Kathmandu. Operating between them flights per day, 20 airlines cover the route. And fly direct, getting you to Tribhuvan Intl. in just hours. If you have a preferred carrier, use our advanced search tool to find the right flight from Seattle - Tacoma Intl. to Tribhuvan Intl..  

To make things even better, in the advanced search, you can also choose to fly economy, premium economy, business or first class, select your maximum number of stops, and pick your preferred departure and arrival time. You can also opt for refundable and direct flights. 

Grab a great deal on your flight from Seattle - Tacoma Intl. (SEA) to Tribhuvan Intl. (KTM)

The easiest way to view the best deals on flights from Seattle to Kathmandu today is to enter your travel dates and hit search. From here, you can sort your results by price to see the cheapest flights first. Right now, return flights from Seattle - Tacoma Intl. to Tribhuvan Intl. start at just £917 and range up to £1,134.  

To find an even better deal, try  

  • being flexible on your dates – midweek flights can be cheaper
  • looking for other airports near Seattle and Kathmandu
  • booking your flight during September, the cheapest month on this route
  • varying your flight times – early morning and late at night are sometimes cheaper 

Why you should book your Seattle to Kathmandu flight with Expedia!

We cater for all flight types, cabin classes and airlines. So whether you’re booking flights from Seattle - Tacoma Intl. to Tribhuvan Intl. for a budget break or a business trip with a bit of pleasure thrown in, we make it easy to secure the seat that’s right for you.  

Thanks to our supersized inventory that offers great choice all in one place, you know you’ll get a great deal with Expedia. Especially if you bundle your flight together with your hotel, you will unlock amazing savings. For added peace of mind, you can choose flexible bookings or filter to find refundable options, so you won’t pay a fee to change your flight.  

Compare flights from Seattle to Kathmandu easily and book with confidence

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*Available to Expedia members.