$391 Cheap Flights from Seattle (SEA) to Kathmandu (KTM)

View $391 flight on Thu, Sep 4, 2025Opens in a new window

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

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Find available prices by choosing your travel dates.

Cheap Flights from Seattle to Kathmandu (SEA-KTM)

Prices were available within the past 7 days and start at $391 for one-way flights and $889 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Singapore Airlines
Thu, Sep 4 - Mon, Sep 22
SEA
Seattle
KTM
Kathmandu
$889 Roundtrip, just found
$889
Roundtrip
just found
Select Singapore Airlines flight, departing Thu, Sep 4 from Seattle to Kathmandu, returning Mon, Sep 22, priced at $889 just found
Singapore Airlines
Thu, Aug 21 - Thu, Oct 16
SEA
Seattle
KTM
Kathmandu
$945 Roundtrip, found 22 hours ago
$945
Roundtrip
found 22 hours ago
Select Singapore Airlines flight, departing Thu, Aug 21 from Seattle to Kathmandu, returning Thu, Oct 16, priced at $945 found 22 hours ago
Singapore Airlines
Thu, Sep 4 - Fri, Sep 26
SEA
Seattle
KTM
Kathmandu
$945 Roundtrip, found 2 days ago
$945
Roundtrip
found 2 days ago
Select Singapore Airlines flight, departing Thu, Sep 4 from Seattle to Kathmandu, returning Fri, Sep 26, priced at $945 found 2 days ago
Singapore Airlines
Sat, Aug 23 - Fri, Oct 3
SEA
Seattle
KTM
Kathmandu
$1,002 Roundtrip, found 12 hours ago
$1,002
Roundtrip
found 12 hours ago
Select Singapore Airlines flight, departing Sat, Aug 23 from Seattle to Kathmandu, returning Fri, Oct 3, priced at $1,002 found 12 hours ago
Singapore Airlines
Thu, Jan 8 - Mon, Jan 26
SEA
Seattle
KTM
Kathmandu
$1,033 Roundtrip, found 5 days ago
$1,033
Roundtrip
found 5 days ago
Select Singapore Airlines flight, departing Thu, Jan 8 from Seattle to Kathmandu, returning Mon, Jan 26, priced at $1,033 found 5 days ago
Singapore Airlines
Thu, Aug 14 - Tue, Aug 26
SEA
Seattle
KTM
Kathmandu
$1,081 Roundtrip, found 6 days ago
$1,081
Roundtrip
found 6 days ago
Select Singapore Airlines flight, departing Thu, Aug 14 from Seattle to Kathmandu, returning Tue, Aug 26, priced at $1,081 found 6 days ago
United
Fri, Sep 5 - Fri, Sep 19
SEA
Seattle
KTM
Kathmandu
$1,083 Roundtrip, found 1 day ago
$1,083
Roundtrip
found 1 day ago
Select United flight, departing Fri, Sep 5 from Seattle to Kathmandu, returning Fri, Sep 19, priced at $1,083 found 1 day ago
Turkish Airlines
Wed, Jul 23 - Fri, Aug 22
SEA
Seattle
KTM
Kathmandu
$1,140 Roundtrip, found 1 day ago
$1,140
Roundtrip
found 1 day ago
Select Turkish Airlines flight, departing Wed, Jul 23 from Seattle to Kathmandu, returning Fri, Aug 22, priced at $1,140 found 1 day ago
Alaska Airlines
Wed, Mar 4 - Tue, Mar 17
PAE
Seattle
KTM
Kathmandu
$1,302 Roundtrip, found 14 hours ago
$1,302
Roundtrip
found 14 hours ago
Select Alaska Airlines flight, departing Wed, Mar 4 from Seattle to Kathmandu, returning Tue, Mar 17, priced at $1,302 found 14 hours ago
Qatar Airways
Wed, Aug 20 - Tue, Sep 30
SEA
Seattle
KTM
Kathmandu
$1,340 Roundtrip, found 12 hours ago
$1,340
Roundtrip
found 12 hours ago
Select Qatar Airways flight, departing Wed, Aug 20 from Seattle to Kathmandu, returning Tue, Sep 30, priced at $1,340 found 12 hours ago

Frequently asked questions

How much does a flight from Seattle - Tacoma Intl. Airport (SEA) to Tribhuvan Intl. Airport (KTM) cost?
Discover the latest flight deals from SEA to KTM by entering your preferred travel dates and searching on Expedia. Easily compare prices by departure date if you have flexibility with your schedule and use handy filters to explore prices for your preferred journey. As a member of One Key™, our free loyalty program, you can use Price Tracking to watch fares and receive notifications if prices go up or down.
What is the cheapest month to fly from SEA to KTM?
The cheapest flights from SEA to KTM are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
What is the cheapest airline that flies from SEA to KTM?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that’ll take you from SEA to KTM. Sort your results by “Price (lowest to highest)” to snap up a great deal.
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.
*Available to One Key members.