Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from Kathmandu to Seattle from $690

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Kathmandu to Seattle departing on 1/31. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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
$1,170Korean Air
Sat, Oct 17 - Sun, Apr 11
Thai Airways Logo
12:25 am - 7:40 pmKTM  Kathmandu Tribhuvan-SEA Seattle/Tacoma Intl
32h 00m2 stops Bangkok Suvarnabhumi Taipei City Taiwan Taoyuan Intl
Thai Airways Logo
1:30 am - 11:25 pmSEA  Seattle/Tacoma Intl-KTM Kathmandu Tribhuvan
33h 10m2 stops Taipei City Taiwan Taoyuan Intl Bangkok Suvarnabhumi
$1,333Thai Airways
Tue, Sep 1 - Tue, Sep 8
Qatar Airways Logo
3:30 pm - 12:45 pmKTM  Kathmandu Tribhuvan-SEA Seattle/Tacoma Intl
34h 00m1 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
$1,368Qatar Airways
Thu, Sep 10 - Mon, Sep 21
Multiple Airlines Logo
1:25 pm - 1:25 pmKTM  Kathmandu Tribhuvan-SEA Seattle/Tacoma Intl
36h 45m2 stops New Delhi Indira Gandhi Intl Dubai Intl
Multiple Airlines Logo
5:15 pm - 6:10 pmSEA  Seattle/Tacoma Intl-KTM Kathmandu Tribhuvan
36h 10m2 stops Dubai Intl New Delhi Indira Gandhi Intl
$1,411Multiple Airlines
Thu, Sep 10 - Mon, Sep 21
Korean Air Logo
7:20 pm - 9:00 amKTM  Kathmandu Tribhuvan-SEA Seattle/Tacoma Intl
27h 25m1 stop Incheon Intl
Korean Air Logo
12:00 pm - 5:45 pmSEA  Seattle/Tacoma Intl-KTM Kathmandu Tribhuvan
41h 00m1 stop Incheon Intl
$1,414Korean Air
Sat, Dec 12 - Thu, Mar 18
Korean Air Logo
7:20 pm - 9:00 amKTM  Kathmandu Tribhuvan-SEA Seattle/Tacoma Intl
27h 25m1 stop Incheon Intl
Korean Air Logo
12:00 pm - 5:45 pmSEA  Seattle/Tacoma Intl-KTM Kathmandu Tribhuvan
41h 00m1 stop Incheon Intl
$1,414Korean Air
Sat, Dec 12 - Sun, Mar 21
Korean Air Logo
7:20 pm - 9:00 amKTM  Kathmandu Tribhuvan-SEA Seattle/Tacoma Intl
27h 25m1 stop Incheon Intl
Korean Air Logo
12:00 pm - 5:45 pmSEA  Seattle/Tacoma Intl-KTM Kathmandu Tribhuvan
41h 00m1 stop Incheon Intl
$1,414Korean Air
Tue, Dec 15 - Thu, Mar 18
Korean Air Logo
7:20 pm - 9:00 amKTM  Kathmandu Tribhuvan-SEA Seattle/Tacoma Intl
27h 25m1 stop Incheon Intl
Korean Air Logo
12:00 pm - 5:45 pmSEA  Seattle/Tacoma Intl-KTM Kathmandu Tribhuvan
41h 00m1 stop Incheon Intl
$1,414Korean Air
Tue, Dec 15 - Sun, Mar 21
Singapore Airlines Logo
11:00 pm - 7:10 amKTM  Kathmandu Tribhuvan-SEA Seattle/Tacoma Intl
21h 55m1 stop Singapore Changi
Singapore Airlines Logo
9:45 am - 9:50 pmSEA  Seattle/Tacoma Intl-KTM Kathmandu Tribhuvan
23h 20m1 stop Singapore Changi
$1,741Singapore Airlines
Fri, Dec 11 - Fri, Mar 19
Singapore Airlines Logo
11:00 pm - 7:10 amKTM  Kathmandu Tribhuvan-SEA Seattle/Tacoma Intl
21h 55m1 stop Singapore Changi
Singapore Airlines Logo
9:45 am - 9:50 pmSEA  Seattle/Tacoma Intl-KTM Kathmandu Tribhuvan
23h 20m1 stop Singapore Changi
$1,741Singapore Airlines
Fri, Dec 11 - Sat, Mar 20

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Turkish Airlines flights from Kathmandu to Seattle

Our best Turkish Airlines deals on Kathmandu to Seattle flight tickets
Turkish Airlines
Dec 14
KTM12:45 pmKathmandu Tribhuvan
42h 10m
1 stop
SEA5:10 pmSeattle/Tacoma Intl
Mar 15
SEA8:05 pmSeattle/Tacoma Intl
26h 30m
1 stop
KTM11:20 amKathmandu Tribhuvan
$1,638
Turkish Airlines
Dec 12
KTM12:45 pmKathmandu Tribhuvan
42h 10m
1 stop
SEA5:10 pmSeattle/Tacoma Intl
Mar 16
SEA8:05 pmSeattle/Tacoma Intl
26h 30m
1 stop
KTM11:20 amKathmandu Tribhuvan
$1,674
Turkish Airlines
Dec 10
KTM12:45 pmKathmandu Tribhuvan
42h 10m
1 stop
SEA5:10 pmSeattle/Tacoma Intl
Mar 18
SEA8:05 pmSeattle/Tacoma Intl
26h 30m
1 stop
KTM11:20 amKathmandu Tribhuvan
$1,721

Korean Air flights from Kathmandu to Seattle

Our best Korean Air deals on Kathmandu to Seattle flight tickets
Korean Air
Oct 17
KTM7:20 pmKathmandu Tribhuvan
28h 05m
1 stop
SEA10:40 amSeattle/Tacoma Intl
Apr 11
SEA12:50 pmSeattle/Tacoma Intl
39h 40m
1 stop
KTM5:15 pmKathmandu Tribhuvan
$1,170
Korean Air
Dec 12
KTM7:20 pmKathmandu Tribhuvan
27h 25m
1 stop
SEA9:00 amSeattle/Tacoma Intl
Mar 21
SEA12:00 pmSeattle/Tacoma Intl
41h 00m
1 stop
KTM5:45 pmKathmandu Tribhuvan
$1,414

momondo Fare Finder

 
Customize your flight search to find flights from Kathmandu to Seattle that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated August 6, 2026.
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 10/17

7:20 pm-10:40 am

1 stop28h 05m

Seattle/Tacoma Intl

Sun 4/11

12:50 pm-5:15 pm

1 stop39h 40m

$1,170

KathmanduSeattle

KTM Kathmandu Tribhuvan - SEA Seattle/Tacoma Intl

KTMSEA

Kathmandu Tribhuvan

Tue 9/1

12:25 am-7:40 pm

2 stops32h 00m

Seattle/Tacoma Intl

Tue 9/8

1:30 am-11:25 pm

2 stops33h 10m

$1,333

KathmanduSeattle

KTM Kathmandu Tribhuvan - SEA Seattle/Tacoma Intl

KTMSEA

Kathmandu Tribhuvan

Thu 9/10

3:30 pm-12:45 pm

1 stop34h 00m

Seattle/Tacoma Intl

Mon 9/21

4:25 pm-8:50 am

1 stop27h 40m

$1,368

KathmanduSeattle

KTM Kathmandu Tribhuvan - SEA Seattle/Tacoma Intl

KTMSEA

Kathmandu Tribhuvan

Thu 9/10

1:25 pm-1:25 pm

2 stops36h 45m

Seattle/Tacoma Intl

Mon 9/21

5:15 pm-6:10 pm

2 stops36h 10m

$1,411

KathmanduSeattle

KTM Kathmandu Tribhuvan - SEA Seattle/Tacoma Intl

KTMSEA

Kathmandu Tribhuvan

Sat 12/12

7:20 pm-9:00 am

1 stop27h 25m

Seattle/Tacoma Intl

Thu 3/18

12:00 pm-5:45 pm

1 stop41h 00m

$1,414

KathmanduSeattle

KTM Kathmandu Tribhuvan - SEA Seattle/Tacoma Intl

KTMSEA

Kathmandu Tribhuvan

Sat 12/12

7:20 pm-9:00 am

1 stop27h 25m

Seattle/Tacoma Intl

Sun 3/21

12:00 pm-5:45 pm

1 stop41h 00m

$1,414

KathmanduSeattle

KTM Kathmandu Tribhuvan - SEA Seattle/Tacoma Intl

KTMSEA

Kathmandu Tribhuvan

Tue 12/15

7:20 pm-9:00 am

1 stop27h 25m

Seattle/Tacoma Intl

Thu 3/18

12:00 pm-5:45 pm

1 stop41h 00m

$1,414

KathmanduSeattle

KTM Kathmandu Tribhuvan - SEA Seattle/Tacoma Intl

KTMSEA

Kathmandu Tribhuvan

Tue 12/15

7:20 pm-9:00 am

1 stop27h 25m

Seattle/Tacoma Intl

Sun 3/21

12:00 pm-5:45 pm

1 stop41h 00m

$1,414
Quickest round-trip

KathmanduSeattle

KTM Kathmandu Tribhuvan - SEA Seattle/Tacoma Intl

KTMSEA

Kathmandu Tribhuvan

Fri 12/11

11:00 pm-7:10 am

1 stop21h 55m

Seattle/Tacoma Intl

Fri 3/19

9:45 am-9:50 pm

1 stop23h 20m

$1,741

KathmanduSeattle

KTM Kathmandu Tribhuvan - SEA Seattle/Tacoma Intl

KTMSEA

Kathmandu Tribhuvan

Fri 12/11

11:00 pm-7:10 am

1 stop21h 55m

Seattle/Tacoma Intl

Sat 3/20

9:45 am-9:50 pm

1 stop23h 20m

$1,741

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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, October 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 October, then you should wait until January to fly from Kathmandu, when ticket prices are also cheap, with an average price of $0.

Can stopping save me money on Kathmandu to Seattle flights?

You could potentially save up to 30% 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

Fastest flight time

34h 00m

Direct flights

None
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
1,584 reviews
Search Singapore Airlines flights

Traveling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Tacoma
Leavenworth
SeaTac
Ocean Shores
Renton
Olympia
Kent
Lynnwood
Redmond
Lakewood
Puyallup
Fife
Federal Way
Tukwila
Cle Elum
Marysville
Kirkland
Centralia
Shoreline
Lacey

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.

An easier way to manage your Seattle trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Sat 9/5
Sat 9/12
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to the United States