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Cheap flights from Kathmandu to Seattle from $554

1 adult
1 adult, Economy, 0 bags

Find the cheapest flights from Kathmandu to Seattle

Cheap round-trip flights

Enter your travel dates to find the best prices.
Korean Air Logo
7:20 pm - 10:40 amKTM  Kathmandu Tribhuvan-SEA Seattle/Tacoma Intl
28h 05m1 stop Incheon Intl
Korean Air Logo
12:10 am - 5:15 pmSEA  Seattle/Tacoma Intl-KTM Kathmandu Tribhuvan
28h 20m1 stop Incheon Intl
$1,208Korean Air
Sat, Oct 10 - Thu, Oct 22
Korean Air Logo
7:20 pm - 10:40 amKTM  Kathmandu Tribhuvan-SEA Seattle/Tacoma Intl
28h 05m1 stop Incheon Intl
Korean Air Logo
12:50 pm - 5:15 pmSEA  Seattle/Tacoma Intl-KTM Kathmandu Tribhuvan
39h 40m1 stop Incheon Intl
$1,208Korean Air
Sat, Oct 10 - Thu, Oct 22
Korean Air Logo
7:20 pm - 10:40 amKTM  Kathmandu Tribhuvan-SEA Seattle/Tacoma Intl
28h 05m1 stop Incheon Intl
Korean Air Logo
12:10 am - 5:15 pmSEA  Seattle/Tacoma Intl-KTM Kathmandu Tribhuvan
28h 20m1 stop Incheon Intl
$1,216Korean Air
Sat, Oct 10 - Thu, Oct 22
Korean Air Logo
7:20 pm - 10:40 amKTM  Kathmandu Tribhuvan-SEA Seattle/Tacoma Intl
28h 05m1 stop Incheon Intl
Korean Air Logo
12:00 pm - 5:00 pmSEA  Seattle/Tacoma Intl-KTM Kathmandu Tribhuvan
40h 15m1 stop Incheon Intl
$1,216Korean Air
Sat, Oct 10 - Sun, Oct 25
Korean Air Logo
7:25 pm - 2:10 pmKTM  Kathmandu Tribhuvan-SEA Seattle/Tacoma Intl
32h 30m1 stop Incheon Intl
Korean Air Logo
11:00 am - 5:00 pmSEA  Seattle/Tacoma Intl-KTM Kathmandu Tribhuvan
40h 15m1 stop Incheon Intl
$1,218Korean Air
Fri, Jan 15 - Sun, Jan 31
Korean Air Logo
7:20 pm - 10:40 amKTM  Kathmandu Tribhuvan-SEA Seattle/Tacoma Intl
28h 05m1 stop Incheon Intl
Korean Air Logo
12:10 am - 5:15 pmSEA  Seattle/Tacoma Intl-KTM Kathmandu Tribhuvan
28h 20m1 stop Incheon Intl
$1,218Korean Air
Sat, Oct 10 - Thu, Oct 22
Korean Air Logo
7:25 pm - 9:05 amKTM  Kathmandu Tribhuvan-SEA Seattle/Tacoma Intl
27h 25m1 stop Incheon Intl
Korean Air Logo
11:00 am - 5:00 pmSEA  Seattle/Tacoma Intl-KTM Kathmandu Tribhuvan
40h 15m1 stop Incheon Intl
$1,218Korean Air
Tue, Jan 19 - Wed, Feb 10
Korean Air Logo
7:25 pm - 2:10 pmKTM  Kathmandu Tribhuvan-SEA Seattle/Tacoma Intl
32h 30m1 stop Incheon Intl
Korean Air Logo
12:10 am - 5:00 pmSEA  Seattle/Tacoma Intl-KTM Kathmandu Tribhuvan
27h 05m1 stop Incheon Intl
$1,218Korean Air
Tue, Jan 19 - Sun, Feb 7
Singapore Airlines Logo
10:50 pm - 8:45 amKTM  Kathmandu Tribhuvan-SEA Seattle/Tacoma Intl
46h 40m1 stop Singapore Changi
Singapore Airlines Logo
10:15 am - 9:30 pmSEA  Seattle/Tacoma Intl-KTM Kathmandu Tribhuvan
22h 30m1 stop Singapore Changi
$1,245Singapore Airlines
Tue, Oct 13 - Tue, Oct 20
Singapore Airlines Logo
10:55 pm - 7:05 amKTM  Kathmandu Tribhuvan-SEA Seattle/Tacoma Intl
45h 55m1 stop Singapore Changi
Singapore Airlines Logo
8:40 am - 9:50 pmSEA  Seattle/Tacoma Intl-KTM Kathmandu Tribhuvan
23h 25m1 stop Singapore Changi
$1,277Singapore Airlines
Fri, Jan 15 - Fri, Feb 5

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Korean Air flights from Kathmandu to Seattle

Our best Korean Air deals on Kathmandu to Seattle flight tickets
Korean Air
Oct 10
KTM7:20 pmKathmandu Tribhuvan
28h 05m
1 stop
SEA10:40 amSeattle/Tacoma Intl
Oct 22
SEA12:50 pmSeattle/Tacoma Intl
39h 40m
1 stop
KTM5:15 pmKathmandu Tribhuvan
$1,208
Korean Air
Oct 10
KTM7:20 pmKathmandu Tribhuvan
28h 05m
1 stop
SEA10:40 amSeattle/Tacoma Intl
Oct 22
SEA12:10 amSeattle/Tacoma Intl
28h 20m
1 stop
KTM5:15 pmKathmandu Tribhuvan
$1,216
Korean Air
Jan 15
KTM7:25 pmKathmandu Tribhuvan
32h 30m
1 stop
SEA2:10 pmSeattle/Tacoma Intl
Feb 7
SEA12:10 amSeattle/Tacoma Intl
27h 05m
1 stop
KTM5:00 pmKathmandu Tribhuvan
$1,218

Qatar Airways flights from Kathmandu to Seattle

Our best Qatar Airways deals on Kathmandu to Seattle flight tickets
Qatar Airways
Oct 11
KTM5:30 pmKathmandu Tribhuvan
31h 40m
1 stop
SEA12:25 pmSeattle/Tacoma Intl
Oct 24
SEA4:25 pmSeattle/Tacoma Intl
28h 40m
1 stop
KTM9:50 amKathmandu Tribhuvan
$1,392
Qatar Airways
Oct 11
KTM5:30 pmKathmandu Tribhuvan
31h 40m
1 stop
SEA12:25 pmSeattle/Tacoma Intl
Oct 22
SEA4:25 pmSeattle/Tacoma Intl
33h 05m
1 stop
KTM2:15 pmKathmandu Tribhuvan
$1,395
Qatar Airways
Oct 12
KTM5:30 pmKathmandu Tribhuvan
31h 40m
1 stop
SEA12:25 pmSeattle/Tacoma Intl
Oct 24
SEA4:25 pmSeattle/Tacoma Intl
27h 10m
1 stop
KTM8:20 amKathmandu Tribhuvan
$1,399

momondo Fare Finder

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

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Price

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Quickest round-trip

KathmanduSeattle

KTM Kathmandu Tribhuvan - SEA Seattle/Tacoma Intl

KTMSEA

Kathmandu Tribhuvan

Sat 10/10

7:20 pm-10:40 am

1 stop28h 05m

Seattle/Tacoma Intl

Thu 10/22

12:10 am-5:15 pm

1 stop28h 20m

$1,208

KathmanduSeattle

KTM Kathmandu Tribhuvan - SEA Seattle/Tacoma Intl

KTMSEA

Kathmandu Tribhuvan

Sat 10/10

7:20 pm-10:40 am

1 stop28h 05m

Seattle/Tacoma Intl

Thu 10/22

12:50 pm-5:15 pm

1 stop39h 40m

$1,208

KathmanduSeattle

KTM Kathmandu Tribhuvan - SEA Seattle/Tacoma Intl

KTMSEA

Kathmandu Tribhuvan

Sat 10/10

7:20 pm-10:40 am

1 stop28h 05m

Seattle/Tacoma Intl

Thu 10/22

12:10 am-5:15 pm

1 stop28h 20m

$1,216

KathmanduSeattle

KTM Kathmandu Tribhuvan - SEA Seattle/Tacoma Intl

KTMSEA

Kathmandu Tribhuvan

Sat 10/10

7:20 pm-10:40 am

1 stop28h 05m

Seattle/Tacoma Intl

Sun 10/25

12:00 pm-5:00 pm

1 stop40h 15m

$1,216

KathmanduSeattle

KTM Kathmandu Tribhuvan - SEA Seattle/Tacoma Intl

KTMSEA

Kathmandu Tribhuvan

Fri 1/15

7:25 pm-2:10 pm

1 stop32h 30m

Seattle/Tacoma Intl

Sun 1/31

11:00 am-5:00 pm

1 stop40h 15m

$1,218

KathmanduSeattle

KTM Kathmandu Tribhuvan - SEA Seattle/Tacoma Intl

KTMSEA

Kathmandu Tribhuvan

Sat 10/10

7:20 pm-10:40 am

1 stop28h 05m

Seattle/Tacoma Intl

Thu 10/22

12:10 am-5:15 pm

1 stop28h 20m

$1,218

KathmanduSeattle

KTM Kathmandu Tribhuvan - SEA Seattle/Tacoma Intl

KTMSEA

Kathmandu Tribhuvan

Tue 1/19

7:25 pm-9:05 am

1 stop27h 25m

Seattle/Tacoma Intl

Wed 2/10

11:00 am-5:00 pm

1 stop40h 15m

$1,218

KathmanduSeattle

KTM Kathmandu Tribhuvan - SEA Seattle/Tacoma Intl

KTMSEA

Kathmandu Tribhuvan

Tue 1/19

7:25 pm-2:10 pm

1 stop32h 30m

Seattle/Tacoma Intl

Sun 2/7

12:10 am-5:00 pm

1 stop27h 05m

$1,218

KathmanduSeattle

KTM Kathmandu Tribhuvan - SEA Seattle/Tacoma Intl

KTMSEA

Kathmandu Tribhuvan

Tue 10/13

10:50 pm-8:45 am

1 stop46h 40m

Seattle/Tacoma Intl

Tue 10/20

10:15 am-9:30 pm

1 stop22h 30m

$1,245

KathmanduSeattle

KTM Kathmandu Tribhuvan - SEA Seattle/Tacoma Intl

KTMSEA

Kathmandu Tribhuvan

Fri 1/15

10:55 pm-7:05 am

1 stop45h 55m

Seattle/Tacoma Intl

Fri 2/5

8:40 am-9:50 pm

1 stop23h 25m

$1,277

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Seattle from

How to get the cheapest flight ticket from Kathmandu to Seattle

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Seattle?

In general, January is the cheapest month to fly from Kathmandu to Seattle. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $0. If you don’t want to visit Seattle in January, then you should wait until September to fly from Kathmandu, when ticket prices are also cheap, with an average price of $1,196.

Can stopping save me money on Kathmandu to Seattle flights?

You could potentially save up to 28% on your flight if you consider stops on a Kathmandu to Seattle flight.

How have Kathmandu to Seattle flight prices changed over time?

As of September 2026, prices for Kathmandu to Seattle flights are approximately 8% cheaper when compared to flights at the same time last year.

When to book flights from Kathmandu to Seattle

Are you open to changing your travel dates? Check out the ideal times to fly from Kathmandu to Seattle according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Kathmandu to Seattle (KTM to SEA) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Kathmandu to Seattle

Best Price Found

$554

Fastest flight time

25h 35m

Direct flights

None
The best one-way flight to Seattle from Kathmandu in the past 72 hours is $554. The best round-trip flight deal from Kathmandu to Seattle found on momondo in the last 72 hours is $1,208.
The fastest flight from Kathmandu to Seattle takes 25h 35m
There are no direct flights from Kathmandu to Seattle. There are no popular flight routes from Kathmandu to Seattle.
Search flight deals

Frequently asked questions about flying from Kathmandu to Seattle

  • How far is Kathmandu Tribhuvan to Seattle/Tacoma Intl by plane?

    The distance between Kathmandu Tribhuvan and Seattle/Tacoma Intl is about 6950.3 mi. Flights usually cover this in 25h 35m, depending on flying conditions and air traffic around both airports.

  • When did momondo last update prices for flights from Kathmandu Tribhuvan Airport to Seattle/Tacoma Intl Airport?

    Prices for flights from Kathmandu Tribhuvan Airport to Seattle/Tacoma Intl Airport refresh daily.

  • How many operators does momondo search for flights from Kathmandu Tribhuvan Airport to Seattle/Tacoma Intl Airport?

  • How old do you have to be to fly from Kathmandu Tribhuvan Airport to Seattle/Tacoma Intl Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Kathmandu Tribhuvan Airport to Seattle/Tacoma Intl Airport.

  • What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?

    The required travel and health documents for your Seattle/Tacoma Intl Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Seattle/Tacoma Intl Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • What is the most popular airline from Kathmandu to Seattle?

Best airlines flying from Kathmandu to Seattle

Compare and see reviews for airlines that fly from Kathmandu to Seattle with momondo
Airline
Rating
Free Cancellation
Price
Singapore AirlinesPriceFrom $1,006Free CancellationRating
8.2
1,606 reviews
Search Singapore Airlines flights

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Why use momondo?

Why should I use momondo to find a flight deal from Kathmandu to Seattle?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Kathmandu to Seattle. momondo saves you time and could save you money on your trip.

Can I find flights from Kathmandu to Seattle with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Kathmandu to Seattle flights to just show those with flexible booking policies.

How can momondo help me find flights from Kathmandu to Seattle?

momondo helps you find the best flight between Kathmandu and Seattle by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from Kathmandu to Seattle right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Kathmandu to Seattle now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Seattle and let you know when they change.

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