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

View AU$1,214 flight on Tue, 2 Dec. 2025Opens 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 for one-way flights and round trip tickets for the period specified. Prices and availability are subject to change. Additional terms apply.

Singapore Airlines
Tue, 2 Dec. - Sat, 20 Dec.
SEA
Seattle
KTM
Kathmandu
AU$2,255 Return, found 2 days ago
AU$2,255
Return
found 2 days ago
Select Singapore Airlines flight, departing Tue, 2 Dec. from Seattle to Kathmandu, returning Sat, 20 Dec., priced at AU$2,255 found 2 days ago
EVA Airways
Sun, 30 Nov. - Wed, 17 Dec.
SEA
Seattle
KTM
Kathmandu
AU$2,340 Return, found 2 days ago
AU$2,340
Return
found 2 days ago
Select EVA Airways flight, departing Sun, 30 Nov. from Seattle to Kathmandu, returning Wed, 17 Dec., priced at AU$2,340 found 2 days ago
Delta
Tue, 2 Dec. - Sat, 20 Dec.
SEA
Seattle
KTM
Kathmandu
AU$2,399 Return, found 2 days ago
AU$2,399
Return
found 2 days ago
Select Delta flight, departing Tue, 2 Dec. from Seattle to Kathmandu, returning Sat, 20 Dec., priced at AU$2,399 found 2 days ago
Alaska Airlines
Tue, 2 Dec. - Sat, 20 Dec.
SEA
Seattle
KTM
Kathmandu
AU$2,406 Return, found 2 days ago
AU$2,406
Return
found 2 days ago
Select Alaska Airlines flight, departing Tue, 2 Dec. from Seattle to Kathmandu, returning Sat, 20 Dec., priced at AU$2,406 found 2 days ago
EVA Airways
Sun, 30 Nov. - Fri, 19 Dec.
SEA
Seattle
KTM
Kathmandu
AU$2,410 Return, found 2 days ago
AU$2,410
Return
found 2 days ago
Select EVA Airways flight, departing Sun, 30 Nov. from Seattle to Kathmandu, returning Fri, 19 Dec., priced at AU$2,410 found 2 days ago
Singapore Airlines
Tue, 2 Dec. - Sat, 20 Dec.
SEA
Seattle
KTM
Kathmandu
AU$2,468 Return, found 2 days ago
AU$2,468
Return
found 2 days ago
Select Singapore Airlines flight, departing Tue, 2 Dec. from Seattle to Kathmandu, returning Sat, 20 Dec., priced at AU$2,468 found 2 days ago
Air Canada
Tue, 2 Dec. - Sat, 20 Dec.
SEA
Seattle
KTM
Kathmandu
AU$2,482 Return, found 2 days ago
AU$2,482
Return
found 2 days ago
Select Air Canada flight, departing Tue, 2 Dec. from Seattle to Kathmandu, returning Sat, 20 Dec., priced at AU$2,482 found 2 days ago
Cathay Pacific
Tue, 2 Dec. - Sat, 20 Dec.
SEA
Seattle
KTM
Kathmandu
AU$2,512 Return, found 2 days ago
AU$2,512
Return
found 2 days ago
Select Cathay Pacific flight, departing Tue, 2 Dec. from Seattle to Kathmandu, returning Sat, 20 Dec., priced at AU$2,512 found 2 days ago
Singapore Airlines
Tue, 2 Dec. - Sat, 20 Dec.
SEA
Seattle
KTM
Kathmandu
AU$2,518 Return, found 2 days ago
AU$2,518
Return
found 2 days ago
Select Singapore Airlines flight, departing Tue, 2 Dec. from Seattle to Kathmandu, returning Sat, 20 Dec., priced at AU$2,518 found 2 days ago
Cathay Pacific
Tue, 2 Dec. - Sat, 20 Dec.
SEA
Seattle
KTM
Kathmandu
AU$2,521 Return, found 2 days ago
AU$2,521
Return
found 2 days ago
Select Cathay Pacific flight, departing Tue, 2 Dec. from Seattle to Kathmandu, returning Sat, 20 Dec., priced at AU$2,521 found 2 days ago

Find the cheapest month to fly from Seattle (SEA) to Kathmandu (KTM)

September is typically the cheapest month to fly

From AU$1,572 - AU$2,640 per traveller.

Graph displaying average flight prices per month

Flight from Seattle to Kathmandu route information
Origin airport
Seattle - Tacoma Intl.
Destination airport
Tribhuvan Intl.
Return price
AU$2,255
Distance
11146 km

Your quick guide to flights from Seattle to Kathmandu

Pick up great flights from Seattle to Kathmandu

With Expedia, you have your pick of flights a day with 20 airlines covering flights from Seattle to Kathmandu. Whether you’re on a business trip, a family holiday or a luxury break, just enter your travel dates, hit search then check out your choice of flights. Select from return, one way or multi-city flights, and use the advance search tool if you want a direct or refundable flight. You can narrow your search to show you just your preferred cabin class and airline, too. It’s all easy. You can book direct flights from Seattle to Kathmandu that take around hours.

Find cheap flights from Seattle to Kathmandu

From the great flight deals with prices currently ranging from AU$2,255 to AU$2,521, you can choose to see the cheapest flights first. Generally, you can book the cheapest flights from Seattle to Kathmandu around 4 to 6 weeks in advance. If your travel dates are flexible, try to avoid weekends and peak seasons – when you are more likely to grab the lowest prices. Even last minute, there are some impressive deals. The cheapest time to fly to Kathmandu is normally in December.

Reasons to book your flight from Seattle to Kathmandu with Expedia

Expedia makes it easy to find, book, and travel, with everything you need all in one place. When you enter your travel details, find fantastic deals just for you on flight tickets from Seattle to Kathmandu across all the main airline carriers, so you can save time, dollars, and hassle finding the perfect flight. If you think your plans could change, choose refundable flights so any changes won’t cost you more. Book your flight to Kathmandu right now and, if you join Expedia Rewards, you earn points this time and every time you travel with Expedia.

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 AU$2,255. 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.

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