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Cheap flights from Kathmandu to Seattle from $561

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
$1,140Korean Air
Sat, Oct 3 - Sun, Oct 18
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
$1,144Korean Air
Sat, Oct 3 - Sun, Oct 18
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
$1,207Korean Air
Sat, Oct 17 - Sun, Oct 25
Thai Airways Logo
1:30 pm - 3:15 pmKTM  Kathmandu Tribhuvan-SEA Seattle/Tacoma Intl
38h 30m2 stops Bangkok Suvarnabhumi Incheon Intl
Thai Airways Logo
1:30 am - 12:25 pmSEA  Seattle/Tacoma Intl-KTM Kathmandu Tribhuvan
46h 10m2 stops Taipei City Taiwan Taoyuan Intl Bangkok Suvarnabhumi
$1,261Thai Airways
Sun, Sep 13 - Sun, Sep 20
Multiple Airlines Logo
12:25 am - 4:10 pmKTM  Kathmandu Tribhuvan-SEA Seattle/Tacoma Intl
28h 30m2 stops Bangkok Suvarnabhumi Taipei City Taiwan Taoyuan Intl
Multiple Airlines Logo
1:15 am - 7:00 pmSEA  Seattle/Tacoma Intl-KTM Kathmandu Tribhuvan
29h 00m2 stops Taipei City Taiwan Taoyuan Intl Bangkok Suvarnabhumi
$1,316Multiple Airlines
Fri, Oct 2 - Sat, Oct 17
Multiple Airlines Logo
1:30 pm - 2:24 pmKTM  Kathmandu Tribhuvan-SEA Seattle/Tacoma Intl
61h 39m3 stops Bangkok Suvarnabhumi Tokyo Haneda San Francisco
Multiple Airlines Logo
4:30 pm - 11:25 pmSEA  Seattle/Tacoma Intl-KTM Kathmandu Tribhuvan
42h 10m2 stops Tokyo Haneda Bangkok Suvarnabhumi
$1,333Multiple Airlines
Sun, Sep 13 - Mon, Sep 21
Multiple Airlines Logo
12:25 am - 4:10 pmKTM  Kathmandu Tribhuvan-SEA Seattle/Tacoma Intl
52h 30m2 stops Bangkok Suvarnabhumi Taipei City Taiwan Taoyuan Intl
Multiple Airlines Logo
1:15 am - 11:25 pmSEA  Seattle/Tacoma Intl-KTM Kathmandu Tribhuvan
33h 25m2 stops Taipei City Taiwan Taoyuan Intl Bangkok Suvarnabhumi
$1,360Multiple Airlines
Fri, Oct 2 - Sat, Oct 17
Multiple Airlines Logo
3:30 pm - 12:25 pmKTM  Kathmandu Tribhuvan-SEA Seattle/Tacoma Intl
33h 40m1 stop Doha Hamad Intl
Multiple Airlines Logo
4:50 pm - 9:50 amSEA  Seattle/Tacoma Intl-KTM Kathmandu Tribhuvan
28h 15m1 stop Doha Hamad Intl
$1,361Multiple Airlines
Fri, Oct 16 - Sun, Oct 25
Qatar Airways Logo
6:00 pm - 1:05 pmKTM  Kathmandu Tribhuvan-SEA Seattle/Tacoma Intl
31h 50m1 stop Doha Hamad Intl
Qatar Airways Logo
4:25 pm - 8:50 amSEA  Seattle/Tacoma Intl-KTM Kathmandu Tribhuvan
27h 40m1 stop Doha Hamad Intl
$1,388Qatar Airways
Sun, Sep 13 - Mon, Sep 21
Multiple Airlines Logo
12:25 am - 4:10 pmKTM  Kathmandu Tribhuvan-SEA Seattle/Tacoma Intl
28h 30m2 stops Bangkok Suvarnabhumi Taipei City Taiwan Taoyuan Intl
Multiple Airlines Logo
1:15 am - 11:25 pmSEA  Seattle/Tacoma Intl-KTM Kathmandu Tribhuvan
33h 25m2 stops Taipei City Taiwan Taoyuan Intl Bangkok Suvarnabhumi
$1,391Multiple Airlines
Wed, Oct 14 - Wed, Oct 21

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Qatar Airways flights from Kathmandu to Seattle

Our best Qatar Airways deals on Kathmandu to Seattle flight tickets
Qatar Airways
Sep 11
KTM10:05 amKathmandu Tribhuvan
39h 45m
1 stop
SEA1:05 pmSeattle/Tacoma Intl
Sep 21
SEA4:25 pmSeattle/Tacoma Intl
27h 40m
1 stop
KTM8:50 amKathmandu Tribhuvan
$1,381
Qatar Airways
Sep 13
KTM6:00 pmKathmandu Tribhuvan
31h 50m
1 stop
SEA1:05 pmSeattle/Tacoma Intl
Sep 21
SEA4:25 pmSeattle/Tacoma Intl
27h 40m
1 stop
KTM8:50 amKathmandu Tribhuvan
$1,388
Qatar Airways
Sep 11
KTM10:05 amKathmandu Tribhuvan
39h 45m
1 stop
SEA1:05 pmSeattle/Tacoma Intl
Sep 21
SEA10:47 amSeattle/Tacoma Intl
33h 18m
2 stops
KTM8:50 amKathmandu Tribhuvan
$1,400

Korean Air flights from Kathmandu to Seattle

Our best Korean Air deals on Kathmandu to Seattle flight tickets
Korean Air
Oct 3
KTM7:20 pmKathmandu Tribhuvan
28h 05m
1 stop
SEA10:40 amSeattle/Tacoma Intl
Oct 18
SEA12:50 pmSeattle/Tacoma Intl
39h 40m
1 stop
KTM5:15 pmKathmandu Tribhuvan
$1,140
Korean Air
Oct 3
KTM7:20 pmKathmandu Tribhuvan
28h 05m
1 stop
SEA10:40 amSeattle/Tacoma Intl
Oct 18
SEA12:50 pmSeattle/Tacoma Intl
39h 40m
1 stop
KTM5:15 pmKathmandu Tribhuvan
$1,144
Korean Air
Sep 8
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
$1,206

momondo Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

KathmanduSeattle

KTM Kathmandu Tribhuvan - SEA Seattle/Tacoma Intl

KTMSEA

Kathmandu Tribhuvan

Sat 10/3

7:20 pm-10:40 am

1 stop28h 05m

Seattle/Tacoma Intl

Sun 10/18

12:50 pm-5:15 pm

1 stop39h 40m

$1,140

KathmanduSeattle

KTM Kathmandu Tribhuvan - SEA Seattle/Tacoma Intl

KTMSEA

Kathmandu Tribhuvan

Sat 10/3

7:20 pm-10:40 am

1 stop28h 05m

Seattle/Tacoma Intl

Sun 10/18

12:50 pm-5:15 pm

1 stop39h 40m

$1,144

KathmanduSeattle

KTM Kathmandu Tribhuvan - SEA Seattle/Tacoma Intl

KTMSEA

Kathmandu Tribhuvan

Sat 10/17

7:20 pm-10:40 am

1 stop28h 05m

Seattle/Tacoma Intl

Sun 10/25

12:00 pm-5:00 pm

1 stop40h 15m

$1,207

KathmanduSeattle

KTM Kathmandu Tribhuvan - SEA Seattle/Tacoma Intl

KTMSEA

Kathmandu Tribhuvan

Sun 9/13

1:30 pm-3:15 pm

2 stops38h 30m

Seattle/Tacoma Intl

Sun 9/20

1:30 am-12:25 pm

2 stops46h 10m

$1,261
Quickest round-trip

KathmanduSeattle

KTM Kathmandu Tribhuvan - SEA Seattle/Tacoma Intl

KTMSEA

Kathmandu Tribhuvan

Fri 10/2

12:25 am-4:10 pm

2 stops28h 30m

Seattle/Tacoma Intl

Sat 10/17

1:15 am-7:00 pm

2 stops29h 00m

$1,316

KathmanduSeattle

KTM Kathmandu Tribhuvan - SEA Seattle/Tacoma Intl

KTMSEA

Kathmandu Tribhuvan

Sun 9/13

1:30 pm-2:24 pm

3 stops61h 39m

Seattle/Tacoma Intl

Mon 9/21

4:30 pm-11:25 pm

2 stops42h 10m

$1,333

KathmanduSeattle

KTM Kathmandu Tribhuvan - SEA Seattle/Tacoma Intl

KTMSEA

Kathmandu Tribhuvan

Fri 10/2

12:25 am-4:10 pm

2 stops52h 30m

Seattle/Tacoma Intl

Sat 10/17

1:15 am-11:25 pm

2 stops33h 25m

$1,360

KathmanduSeattle

KTM Kathmandu Tribhuvan - SEA Seattle/Tacoma Intl

KTMSEA

Kathmandu Tribhuvan

Fri 10/16

3:30 pm-12:25 pm

1 stop33h 40m

Seattle/Tacoma Intl

Sun 10/25

4:50 pm-9:50 am

1 stop28h 15m

$1,361

KathmanduSeattle

KTM Kathmandu Tribhuvan - SEA Seattle/Tacoma Intl

KTMSEA

Kathmandu Tribhuvan

Sun 9/13

6:00 pm-1:05 pm

1 stop31h 50m

Seattle/Tacoma Intl

Mon 9/21

4:25 pm-8:50 am

1 stop27h 40m

$1,388

KathmanduSeattle

KTM Kathmandu Tribhuvan - SEA Seattle/Tacoma Intl

KTMSEA

Kathmandu Tribhuvan

Wed 10/14

12:25 am-4:10 pm

2 stops28h 30m

Seattle/Tacoma Intl

Wed 10/21

1:15 am-11:25 pm

2 stops33h 25m

$1,391

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 25% 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

$561

Fastest flight time

28h 05m

Direct flights

None
The best one-way flight to Seattle from Kathmandu in the past 72 hours is $561. The best round-trip flight deal from Kathmandu to Seattle found on momondo in the last 72 hours is $1,140.
The fastest flight from Kathmandu to Seattle takes 28h 05m
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 28h 05m, 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
1,593 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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