$393 Cheap Flights from Seattle (SEA) to Kathmandu (KTM)

View $393 flight on Thu, Jan 1, 2026Opens in a new window

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

Cheap Flights from Seattle to Kathmandu (SEA-KTM)

Prices were available within the past 7 days and start at $393 for one-way flights and $946 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Singapore Airlines
Tue, Mar 3 - Mon, Mar 30
SEA
Seattle
KTM
Kathmandu
$946 Roundtrip, found 21 hours ago
$946
Roundtrip
found 21 hours ago
Select Singapore Airlines flight, departing Tue, Mar 3 from Seattle to Kathmandu, returning Mon, Mar 30, priced at $946 found 21 hours ago
Singapore Airlines
Tue, Mar 10 - Wed, Apr 8
SEA
Seattle
KTM
Kathmandu
$949 Roundtrip, found 2 days ago
$949
Roundtrip
found 2 days ago
Select Singapore Airlines flight, departing Tue, Mar 10 from Seattle to Kathmandu, returning Wed, Apr 8, priced at $949 found 2 days ago
Singapore Airlines
Sat, May 9 - Wed, May 27
SEA
Seattle
KTM
Kathmandu
$976 Roundtrip, found 17 hours ago
$976
Roundtrip
found 17 hours ago
Select Singapore Airlines flight, departing Sat, May 9 from Seattle to Kathmandu, returning Wed, May 27, priced at $976 found 17 hours ago
Singapore Airlines
Tue, Mar 31 - Wed, May 6
SEA
Seattle
KTM
Kathmandu
$978 Roundtrip, found 1 day ago
$978
Roundtrip
found 1 day ago
Select Singapore Airlines flight, departing Tue, Mar 31 from Seattle to Kathmandu, returning Wed, May 6, priced at $978 found 1 day ago
Turkish Airlines
Mon, Dec 29 - Tue, Apr 7
SEA
Seattle
KTM
Kathmandu
$982 Roundtrip, found 21 hours ago
$982
Roundtrip
found 21 hours ago
Select Turkish Airlines flight, departing Mon, Dec 29 from Seattle to Kathmandu, returning Tue, Apr 7, priced at $982 found 21 hours ago
Singapore Airlines
Tue, Feb 3 - Wed, Feb 18
SEA
Seattle
KTM
Kathmandu
$984 Roundtrip, found 1 day ago
$984
Roundtrip
found 1 day ago
Select Singapore Airlines flight, departing Tue, Feb 3 from Seattle to Kathmandu, returning Wed, Feb 18, priced at $984 found 1 day ago
Singapore Airlines
Tue, Apr 7 - Wed, Apr 29
SEA
Seattle
KTM
Kathmandu
$988 Roundtrip, found 1 day ago
$988
Roundtrip
found 1 day ago
Select Singapore Airlines flight, departing Tue, Apr 7 from Seattle to Kathmandu, returning Wed, Apr 29, priced at $988 found 1 day ago
Cathay Pacific
Sat, May 9 - Sun, May 31
SEA
Seattle
KTM
Kathmandu
$1,661 Roundtrip, found 2 hours ago
$1,661
Roundtrip
found 2 hours ago
Select Cathay Pacific flight, departing Sat, May 9 from Seattle to Kathmandu, returning Sun, May 31, priced at $1,661 found 2 hours ago
Emirates
Wed, Nov 12 - Tue, Dec 9
SEA
Seattle
KTM
Kathmandu
$1,815 Roundtrip, just found
$1,815
Roundtrip
just found
Select Emirates flight, departing Wed, Nov 12 from Seattle to Kathmandu, returning Tue, Dec 9, priced at $1,815 just found
Korean Air
Sun, Apr 5 - Sat, Apr 11
SEA
Seattle
KTM
Kathmandu
$1,890 Roundtrip, found 5 hours ago
$1,890
Roundtrip
found 5 hours ago
Select Korean Air flight, departing Sun, Apr 5 from Seattle to Kathmandu, returning Sat, Apr 11, priced at $1,890 found 5 hours ago

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

September is typically the cheapest month to fly

From $1,017 - $1,807 per traveler.

Alternative airports near Kathmandu

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Tribhuvan Intl. KTM. Cheapest and Closest option available. Average driving time to city center is 6 minutes. Flights from $1,307
KTM
Tribhuvan Intl.
CheapestClosest
Average driving time to city center6 min
Flights from $1,307
Flights from Seattle (SEA) to Kathmandu (KTM)
Origin airport
Seattle - Tacoma Intl.
Destination airport
Tribhuvan Intl.
Airlines serving
Cathay Pacific, Emirates, KLM, Korean Air, Malaysia Airlines, Qatar Airways, Singapore Airlines, SriLankan Airlines, Swiss International Air Lines, Turkish Airlines
Roundtrip price
$946
Distance
6966 mi

Seattle to Kathmandu Flights

The cheapest times to fly from Seattle to Kathmandu

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Seattle to Kathmandu are during the month of March. You can find some of the cheapest flights from Seattle to Kathmandu with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Seattle to Kathmandu

Sunday is one of the best days to book for cheap flights from Seattle to Kathmandu: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Seattle to Kathmandu

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Seattle to Kathmandu in 2025. You can also book with separate airlines for your outbound and return journeys, from $393 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Seattle to Kathmandu flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Seattle to Kathmandu airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Seattle - Tacoma Intl. Airport (SEA) to Tribhuvan Intl. Airport (KTM) cost?
Grab a cheap one-way flight from $393 or cheap return flight from $946 from Seattle - Tacoma Intl. Airport (SEA) to Tribhuvan Intl. Airport (KTM) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight deals on this route.
What is the cheapest month to fly from Seattle - Tacoma Intl. Airport (SEA) to Tribhuvan Intl. Airport (KTM)?
March is the most affordable month to fly from SEA to KTM. Traveling during an off-peak travel window is often the key to better flight prices.
What is the cheapest airline that flies from Seattle - Tacoma Intl. Airport (SEA) to Tribhuvan Intl. Airport (KTM)?
Expedia's filter tool lets you easily compare different airlines, flight durations and fares all in one place. Choose your preferences, then sort by "Price (lowest to highest)" to find the carrier with the cheapest SEA to KTM flight.
How many flights per day from Seattle - Tacoma Intl. Airport (SEA) to Tribhuvan Intl. Airport (KTM)?
You'll need to book a flight with a layover when traveling from Seattle - Tacoma Intl. Airport (SEA) to Tribhuvan Intl. Airport (KTM). Direct flights don't operate daily on this route. However, just filter your search to include one or two stops to discover the best option for your trip.
What day of the week has the most flights from SEA to KTM?
Friday is generally the busiest day for flights, while Tuesday is often the quietest.* Keep in mind that flight schedules can vary based on various factors, such as the time of year and airline.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Seattle - Tacoma Intl. Airport (SEA) to Tribhuvan Intl. Airport (KTM)?
To arrive at Tribhuvan Intl. Airport (KTM) on time, pick a flight that takes off from Seattle - Tacoma Intl. Airport (SEA) before 3 PM. The likelihood of cancellations is 22% higher, on average, for departures after this time.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Seattle - Tacoma Intl. Airport (SEA) to Tribhuvan Intl. Airport (KTM) last-minute?
Holding off until just before your departure to book a flight from SEA to KTM generally means paying more. While you might find some last-minute offers, they're not always guaranteed. Be flexible with your itinerary for the best chance of snagging a bargain.
Is it cheaper to book a SEA to KTM flight and hotel package?
Securing a SEA to KTM flight and hotel package is typically cheaper than booking separately. With Expedia, you can enjoy the convenience of organizing your travels all in one place. Choose from our extensive range of accommodations and then add car rentals, flights and activities 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 - Tacoma Intl. Airport (SEA) to Tribhuvan Intl. Airport (KTM)?
It's generally possible to reschedule or cancel your SEA to KTM flight. However, if it's been more than 24 hours since booking, additional charges may apply. Refer to your airline's policies in your itinerary to see what changes are possible and whether any costs are involved. You'll also find further details on our Customer Service portal.

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*Available to One Key members.