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Cheap flights from Kathmandu to Seattle from $676

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
12:50 pm - 5:15 pmSEA  Seattle/Tacoma Intl-KTM Kathmandu Tribhuvan
39h 40m1 stop Incheon Intl
$1,204Korean Air
Tue, Sep 15 - Sun, Sep 20
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
$1,204Korean Air
Tue, Sep 15 - Thu, Sep 17
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
$1,207Korean Air
Tue, Sep 15 - Sun, Sep 20
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
$1,207Korean Air
Tue, Sep 15 - Thu, Sep 24
Multiple Airlines Logo
12:25 am - 1:55 pmKTM  Kathmandu Tribhuvan-SEA Seattle/Tacoma Intl
51h 15m2 stops Bangkok Suvarnabhumi Incheon Intl
Multiple Airlines Logo
12:10 am - 11:25 pmSEA  Seattle/Tacoma Intl-KTM Kathmandu Tribhuvan
33h 30m2 stops Incheon Intl Bangkok Suvarnabhumi
$1,232Multiple Airlines
Wed, Dec 16 - Wed, Jan 20
Air India Logo
9:10 pm - 4:11 pmKTM  Kathmandu Tribhuvan-SEA Seattle/Tacoma Intl
55h 46m2 stops New Delhi Indira Gandhi Intl New York John F Kennedy Intl
Air India Logo
11:15 pm - 12:50 pmSEA  Seattle/Tacoma Intl-KTM Kathmandu Tribhuvan
48h 50m2 stops New York John F Kennedy Intl New Delhi Indira Gandhi Intl
$1,238Air India
Mon, Sep 14 - Sat, Sep 19
Air India Logo
1:25 pm - 11:22 amKTM  Kathmandu Tribhuvan-SEA Seattle/Tacoma Intl
34h 42m3 stops New Delhi Indira Gandhi Intl Kolkata Netaji S. Chandra San Francisco
Air India Logo
11:15 pm - 12:50 pmSEA  Seattle/Tacoma Intl-KTM Kathmandu Tribhuvan
48h 50m2 stops New York John F Kennedy Intl New Delhi Indira Gandhi Intl
$1,343Air India
Mon, Sep 14 - Sat, Sep 19
Multiple Airlines Logo
11:00 pm - 7:00 pmKTM  Kathmandu Tribhuvan-SEA Seattle/Tacoma Intl
32h 45m2 stops Hong Kong Intl Taipei City Taiwan Taoyuan Intl
Multiple Airlines Logo
1:30 am - 9:45 pmSEA  Seattle/Tacoma Intl-KTM Kathmandu Tribhuvan
31h 30m2 stops Taipei City Taiwan Taoyuan Intl Hong Kong Intl
$1,345Multiple Airlines
Mon, Sep 14 - Sat, Sep 19
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
$1,355Korean Air
Sat, Sep 12 - Sun, Sep 20
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
$1,363Korean Air
Sat, Sep 12 - Thu, Sep 17

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Korean Air flights from Kathmandu to Seattle

Our best Korean Air deals on Kathmandu to Seattle flight tickets
Korean Air
Sep 15
KTM7:20 pmKathmandu Tribhuvan
28h 05m
1 stop
SEA10:40 amSeattle/Tacoma Intl
Sep 17
SEA12:50 pmSeattle/Tacoma Intl
39h 40m
1 stop
KTM5:15 pmKathmandu Tribhuvan
$1,204
Korean Air
Sep 15
KTM7:20 pmKathmandu Tribhuvan
28h 05m
1 stop
SEA10:40 amSeattle/Tacoma Intl
Sep 24
SEA12:50 pmSeattle/Tacoma Intl
39h 40m
1 stop
KTM5:15 pmKathmandu Tribhuvan
$1,207
Korean Air
Sep 12
KTM7:20 pmKathmandu Tribhuvan
28h 05m
1 stop
SEA10:40 amSeattle/Tacoma Intl
Sep 20
SEA12:50 pmSeattle/Tacoma Intl
39h 40m
1 stop
KTM5:15 pmKathmandu Tribhuvan
$1,355

Air India flights from Kathmandu to Seattle

Our best Air India deals on Kathmandu to Seattle flight tickets
Air India
Sep 14
KTM9:10 pmKathmandu Tribhuvan
55h 46m
2 stops
SEA4:11 pmSeattle/Tacoma Intl
Sep 19
SEA11:15 pmSeattle/Tacoma Intl
48h 50m
2 stops
KTM12:50 pmKathmandu Tribhuvan
$1,238
Air India
Sep 14
KTM1:25 pmKathmandu Tribhuvan
34h 42m
3 stops
SEA11:22 amSeattle/Tacoma Intl
Sep 19
SEA11:15 pmSeattle/Tacoma Intl
48h 50m
2 stops
KTM12:50 pmKathmandu Tribhuvan
$1,343
Air India
Sep 13
KTM1:25 pmKathmandu Tribhuvan
34h 42m
3 stops
SEA11:22 amSeattle/Tacoma Intl
Sep 25
SEA11:15 pmSeattle/Tacoma Intl
28h 30m
2 stops
KTM4:30 pmKathmandu Tribhuvan
$1,557

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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Route

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Price

Cheapest round-trip

KathmanduSeattle

KTM Kathmandu Tribhuvan - SEA Seattle/Tacoma Intl

KTMSEA

Kathmandu Tribhuvan

Tue 9/15

7:20 pm-10:40 am

1 stop28h 05m

Seattle/Tacoma Intl

Sun 9/20

12:50 pm-5:15 pm

1 stop39h 40m

$1,204

KathmanduSeattle

KTM Kathmandu Tribhuvan - SEA Seattle/Tacoma Intl

KTMSEA

Kathmandu Tribhuvan

Tue 9/15

7:20 pm-10:40 am

1 stop28h 05m

Seattle/Tacoma Intl

Thu 9/17

12:50 pm-5:15 pm

1 stop39h 40m

$1,204

KathmanduSeattle

KTM Kathmandu Tribhuvan - SEA Seattle/Tacoma Intl

KTMSEA

Kathmandu Tribhuvan

Tue 9/15

7:20 pm-10:40 am

1 stop28h 05m

Seattle/Tacoma Intl

Sun 9/20

12:50 pm-5:15 pm

1 stop39h 40m

$1,207

KathmanduSeattle

KTM Kathmandu Tribhuvan - SEA Seattle/Tacoma Intl

KTMSEA

Kathmandu Tribhuvan

Tue 9/15

7:20 pm-10:40 am

1 stop28h 05m

Seattle/Tacoma Intl

Thu 9/24

12:50 pm-5:15 pm

1 stop39h 40m

$1,207

KathmanduSeattle

KTM Kathmandu Tribhuvan - SEA Seattle/Tacoma Intl

KTMSEA

Kathmandu Tribhuvan

Wed 12/16

12:25 am-1:55 pm

2 stops51h 15m

Seattle/Tacoma Intl

Wed 1/20

12:10 am-11:25 pm

2 stops33h 30m

$1,232

KathmanduSeattle

KTM Kathmandu Tribhuvan - SEA Seattle/Tacoma Intl

KTMSEA

Kathmandu Tribhuvan

Mon 9/14

9:10 pm-4:11 pm

2 stops55h 46m

Seattle/Tacoma Intl

Sat 9/19

11:15 pm-12:50 pm

2 stops48h 50m

$1,238

KathmanduSeattle

KTM Kathmandu Tribhuvan - SEA Seattle/Tacoma Intl

KTMSEA

Kathmandu Tribhuvan

Mon 9/14

1:25 pm-11:22 am

3 stops34h 42m

Seattle/Tacoma Intl

Sat 9/19

11:15 pm-12:50 pm

2 stops48h 50m

$1,343
Quickest round-trip

KathmanduSeattle

KTM Kathmandu Tribhuvan - SEA Seattle/Tacoma Intl

KTMSEA

Kathmandu Tribhuvan

Mon 9/14

11:00 pm-7:00 pm

2 stops32h 45m

Seattle/Tacoma Intl

Sat 9/19

1:30 am-9:45 pm

2 stops31h 30m

$1,345

KathmanduSeattle

KTM Kathmandu Tribhuvan - SEA Seattle/Tacoma Intl

KTMSEA

Kathmandu Tribhuvan

Sat 9/12

7:20 pm-10:40 am

1 stop28h 05m

Seattle/Tacoma Intl

Sun 9/20

12:50 pm-5:15 pm

1 stop39h 40m

$1,355

KathmanduSeattle

KTM Kathmandu Tribhuvan - SEA Seattle/Tacoma Intl

KTMSEA

Kathmandu Tribhuvan

Sat 9/12

7:20 pm-10:40 am

1 stop28h 05m

Seattle/Tacoma Intl

Thu 9/17

12:50 pm-5:15 pm

1 stop39h 40m

$1,363

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 16% 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 August 2026, prices for Kathmandu to Seattle flights are approximately 24% 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

$676

Fastest flight time

34h 00m

Direct flights

None
The best one-way flight to Seattle from Kathmandu in the past 72 hours is $676. The best round-trip flight deal from Kathmandu to Seattle found on momondo in the last 72 hours is $1,204.
The fastest flight from Kathmandu to Seattle takes 34h 00m
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 34h 00m, 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
1,585 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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