Which layover airport offers the lowest fares from Seattle to Kathmandu?

Flights via Singapore (SIN) offer the lowest average round-trip price of $1,235.

Which airport is the most popular layover for flights between Seattle and Kathmandu?

Doha (DOH) was the most common stop: 40% of momondo users choosing 1-stop flights on this route connected there.

Which layover airport has the shortest travel time from Seattle to Kathmandu?

Flights connecting via Singapore (SIN) have the shortest average one-way travel time: 24h 15m.

What airlines fly to Kathmandu?

Singapore Airlines, Turkish Airlines and Qatar Airways are the top three most popular airlines that fly to Kathmandu from Seattle according to our data. Singapore Airlines is the first choice among our users, with 56% of people opting to fly with this airline when traveling to Kathmandu. Keep in mind that there are 5 different airlines that fly to Kathmandu on a routine basis, so you have a few additional options to choose from.

Which layover airport has the shortest connection time from Seattle to Kathmandu?

Istanbul (IST) has the shortest average layover time for this route: 7h 11m.

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

Prices for flights from Seattle/Tacoma Intl Airport to Kathmandu Tribhuvan Airport are refreshed on a daily basis.

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

There are 5 operators available for flights from Seattle/Tacoma Intl Airport to Kathmandu Tribhuvan Airport as of December 2025.

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

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Seattle/Tacoma Intl Airport to Kathmandu Tribhuvan Airport.

What documentation or ID do you need to fly to Kathmandu Tribhuvan Airport?

The travel and health documents you'll need for your trip to Kathmandu Tribhuvan Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Kathmandu Tribhuvan Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$455 Cheap Flights from Seattle to Kathmandu in 2025/26

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Cheap round-trip flights

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10:15 am - 9:45 pm

SEA

KTM

22h 45m1 stop

10:50 pm - 8:45 am

KTM

SEA

22h 40m1 stop

$985Singapore Airlines

Tue, May 5 - Wed, May 20

10:15 am - 9:45 pm

SEA

KTM

22h 45m1 stop

11:10 pm - 8:45 am

KTM

SEA

22h 20m1 stop

$999Singapore Airlines

Tue, Mar 31 - Wed, Apr 22

10:00 am - 9:45 pm

SEA

KTM

47h 00m2 stops

11:00 pm - 10:10 am

KTM

SEA

23h 55m1 stop

$1,008Cathay Pacific

Wed, Apr 8 - Wed, Apr 22

11:50 am - 9:45 pm

SEA

KTM

21h 10m1 stop

11:00 pm - 10:10 am

KTM

SEA

23h 55m1 stop

$1,009Cathay Pacific

Wed, Apr 1 - Wed, Apr 22

9:45 am - 9:50 pm

SEA

KTM

23h 20m1 stop

11:05 pm - 8:10 am

KTM

SEA

21h 50m1 stop

$1,012Singapore Airlines

Sun, Mar 8 - Wed, Mar 18

7:51 pm - 9:45 pm

SEA

KTM

61h 09m2 stops

11:00 pm - 10:10 am

KTM

SEA

23h 55m1 stop

$1,017Cathay Pacific

Wed, Apr 1 - Wed, Apr 22

10:15 am - 9:45 pm

SEA

KTM

22h 45m1 stop

10:50 pm - 8:45 am

KTM

SEA

22h 40m1 stop

$1,019Singapore Airlines

Sun, Apr 5 - Mon, Apr 13

7:15 am - 9:30 pm

SEA

KTM

49h 30m2 stops

11:00 pm - 10:10 am

KTM

SEA

23h 55m1 stop

$1,030Cathay Pacific

Mon, Mar 9 - Sun, Apr 12

10:00 am - 9:45 pm

SEA

KTM

47h 00m2 stops

11:00 pm - 10:42 pm

KTM

SEA

36h 27m2 stops

$1,033Cathay Pacific

Tue, May 5 - Wed, May 20

11:50 am - 9:45 pm

SEA

KTM

21h 10m1 stop

11:00 pm - 10:10 am

KTM

SEA

23h 55m1 stop

$1,034Cathay Pacific

Wed, Apr 29 - Sun, May 3

Qatar Airways flights from Seattle to Kathmandu

Our best Qatar Airways deals on Seattle to Kathmandu flight tickets

Qatar Airways

Feb 25

SEA8:15 amSeattle/Tacoma Intl

42h 25m

2 stops

KTM4:25 pmKathmandu Tribhuvan

Mar 4

KTM7:05 pmKathmandu Tribhuvan

41h 47m

2 stops

SEA11:07 pmSeattle/Tacoma Intl

$1,049

Find similar

Qatar Airways

Feb 3

SEA8:25 amSeattle/Tacoma Intl

42h 15m

2 stops

KTM4:25 pmKathmandu Tribhuvan

Feb 19

KTM5:40 pmKathmandu Tribhuvan

41h 53m

2 stops

SEA9:48 pmSeattle/Tacoma Intl

$1,082

Find similar

Qatar Airways

Mar 27

SEA8:10 amSeattle/Tacoma Intl

43h 50m

2 stops

KTM4:45 pmKathmandu Tribhuvan

Apr 12

KTM10:05 amKathmandu Tribhuvan

49h 56m

2 stops

SEA11:16 pmSeattle/Tacoma Intl

$1,108

Find similar

Cathay Pacific flights from Seattle to Kathmandu

Our best Cathay Pacific deals on Seattle to Kathmandu flight tickets

Cathay Pacific

Apr 8

SEA10:00 amSeattle/Tacoma Intl

47h 00m

2 stops

KTM9:45 pmKathmandu Tribhuvan

Apr 22

KTM11:00 pmKathmandu Tribhuvan

23h 55m

1 stop

SEA10:10 amSeattle/Tacoma Intl

$1,008

Find similar

Cathay Pacific

Apr 1

SEA11:50 amSeattle/Tacoma Intl

21h 10m

1 stop

KTM9:45 pmKathmandu Tribhuvan

Apr 22

KTM11:00 pmKathmandu Tribhuvan

23h 55m

1 stop

SEA10:10 amSeattle/Tacoma Intl

$1,009

Find similar

Cathay Pacific

Apr 1

SEA7:51 pmSeattle/Tacoma Intl

61h 09m

2 stops

KTM9:45 pmKathmandu Tribhuvan

Apr 22

KTM11:00 pmKathmandu Tribhuvan

23h 55m

1 stop

SEA10:10 amSeattle/Tacoma Intl

$1,017

Find similar

Fly from

Fly to

Route

Depart

Return

Price

SeattleKathmandu

SEA - KTM

SEAKTM

Seattle/Tacoma Intl

Tue 5/5

10:15 am-9:45 pm

1 stop22h 45m

Kathmandu Tribhuvan

Wed 5/20

10:50 pm-8:45 am

1 stop22h 40m

$985

SeattleKathmandu

SEA - KTM

SEAKTM

Seattle/Tacoma Intl

Tue 3/31

10:15 am-9:45 pm

1 stop22h 45m

Kathmandu Tribhuvan

Wed 4/22

11:10 pm-8:45 am

1 stop22h 20m

$999

SeattleKathmandu

SEA - KTM

SEAKTM

Seattle/Tacoma Intl

Wed 4/8

10:00 am-9:45 pm

2 stops47h 00m

Kathmandu Tribhuvan

Wed 4/22

11:00 pm-10:10 am

1 stop23h 55m

$1,008

SeattleKathmandu

SEA - KTM

SEAKTM

Seattle/Tacoma Intl

Wed 4/1

11:50 am-9:45 pm

1 stop21h 10m

Kathmandu Tribhuvan

Wed 4/22

11:00 pm-10:10 am

1 stop23h 55m

$1,009

SeattleKathmandu

SEA - KTM

SEAKTM

Seattle/Tacoma Intl

Sun 3/8

9:45 am-9:50 pm

1 stop23h 20m

Kathmandu Tribhuvan

Wed 3/18

11:05 pm-8:10 am

1 stop21h 50m

$1,012

SeattleKathmandu

SEA - KTM

SEAKTM

Seattle/Tacoma Intl

Wed 4/1

7:51 pm-9:45 pm

2 stops61h 09m

Kathmandu Tribhuvan

Wed 4/22

11:00 pm-10:10 am

1 stop23h 55m

$1,017

SeattleKathmandu

SEA - KTM

SEAKTM

Seattle/Tacoma Intl

Sun 4/5

10:15 am-9:45 pm

1 stop22h 45m

Kathmandu Tribhuvan

Mon 4/13

10:50 pm-8:45 am

1 stop22h 40m

$1,019

SeattleKathmandu

SEA - KTM

SEAKTM

Seattle/Tacoma Intl

Mon 3/9

7:15 am-9:30 pm

2 stops49h 30m

Kathmandu Tribhuvan

Sun 4/12

11:00 pm-10:10 am

1 stop23h 55m

$1,030

SeattleKathmandu

SEA - KTM

SEAKTM

Seattle/Tacoma Intl

Tue 5/5

10:00 am-9:45 pm

2 stops47h 00m

Kathmandu Tribhuvan

Wed 5/20

11:00 pm-10:42 pm

2 stops36h 27m

$1,033

SeattleKathmandu

SEA - KTM

SEAKTM

Seattle/Tacoma Intl

Wed 4/29

11:50 am-9:45 pm

1 stop21h 10m

Kathmandu Tribhuvan

Sun 5/3

11:00 pm-10:10 am

1 stop23h 55m

$1,034

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Seattle to Kathmandu

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

Prices

Airlines

Layovers

What is the cheapest month to fly to Kathmandu?

The month of August is another great option to travel to Kathmandu, with average flight prices from Seattle averaging around $1,222.

How far in advance should I book a flight to Kathmandu?

You are more likely to see cheaper flights to Kathmandu from Seattle when booking weeks ahead of your departure date. In general, you can expect to find flights to Kathmandu for around $1,328 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Kathmandu from Seattle for as low as $1,000 on momondo.

How have Seattle to Kathmandu flight prices changed over time?

As of December 2025, prices for Seattle to Kathmandu flights are approximately 29% more expensive when compared to flights at the same time last year.

When to book flights from Seattle to Kathmandu

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

Estimated round-trip price

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

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

Fastest flight time	22h 45m
Direct flights	None

The fastest flight from Seattle to Kathmandu takes 22h 45m

There are no direct flights from Seattle to Kathmandu. There are no popular flight routes from Seattle to Kathmandu.

Search flight deals

How far is Seattle/Tacoma Intl to Kathmandu Tribhuvan by plane?
A flight from Seattle/Tacoma Intl to Kathmandu Tribhuvan will travel around 6950.3 mi. In terms of flight time, this usually takes a little over 22h 45m.
When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to Kathmandu Tribhuvan Airport?
Prices for flights from Seattle/Tacoma Intl Airport to Kathmandu Tribhuvan Airport are refreshed on a daily basis.
How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to Kathmandu Tribhuvan Airport?
There are 5 operators available for flights from Seattle/Tacoma Intl Airport to Kathmandu Tribhuvan Airport as of December 2025.
How old do you have to be to fly from Seattle/Tacoma Intl Airport to Kathmandu Tribhuvan Airport?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Seattle/Tacoma Intl Airport to Kathmandu Tribhuvan Airport.
What documentation or ID do you need to fly to Kathmandu Tribhuvan Airport?
The travel and health documents you'll need for your trip to Kathmandu Tribhuvan Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Kathmandu Tribhuvan Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular airline from Seattle to Kathmandu?
momondo data reveals that the most frequently booked airline on the route from Seattle to Kathmandu is Singapore Airlines, representing 54% of all bookings. The subsequent popular airlines are Turkish Airlines at 21%, Qatar Airways at 16%, and Emirates at 5%.

Best airlines flying from Seattle to Kathmandu

Compare and see reviews for airlines that fly from Seattle to Kathmandu with momondo

Airline	Rating	Free Cancellation	Price
Singapore Airlines	PriceFrom $898	Free Cancellation	Rating 8.1 1,424 reviews	Search Singapore Airlines flights
Qatar Airways	PriceFrom $984	Free Cancellation	Rating 7.4 3,700 reviews	Search Qatar Airways flights
Turkish Airlines	PriceFrom $1,020	Free Cancellation	Rating 7.3 4,133 reviews	Search Turkish Airlines flights
Cathay Pacific	PriceFrom $1,034	Free Cancellation	Rating 7.6 1,112 reviews	Search Cathay Pacific flights
Emirates	PriceFrom $1,138	Free Cancellation	Rating 8.1 3,448 reviews	Search Emirates flights

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Why use momondo?

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

It is quick and easy to find Seattle to Kathmandu flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Kathmandu that suits you.

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

momondo does allow users to show only those flights to Kathmandu from Seattle which offer a flexible booking policy as well as other useful filters and features.

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

momondo provides multiple filters to help you find the best flight to Kathmandu from Seattle. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

If you are simply researching potential flights to Kathmandu, momondo offers a useful price alert feature which will track prices for flights to Kathmandu from Seattle and alert you when they change.

An easier way to manage your Kathmandu 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.

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Cheap flights from Seattle to Kathmandu from $455

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to Kathmandu departing on 2/14. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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Find the cheapest flights from Seattle to Kathmandu

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Qatar Airways flights from Seattle to Kathmandu

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

See travel insights to Kathmandu from

How to get the cheapest flight ticket from Seattle to Kathmandu

What is the cheapest month to fly to Kathmandu?

The month of August is another great option to travel to Kathmandu, with average flight prices from Seattle averaging around $1,222.

How far in advance should I book a flight to Kathmandu?

How have Seattle to Kathmandu flight prices changed over time?

As of December 2025, prices for Seattle to Kathmandu flights are approximately 29% more expensive when compared to flights at the same time last year.

What airlines fly to Kathmandu?

Which airport is the most popular layover for flights between Seattle and Kathmandu?

Doha (DOH) was the most common stop: 40% of momondo users choosing 1-stop flights on this route connected there.

Which layover airport offers the lowest fares from Seattle to Kathmandu?

Flights via Singapore (SIN) offer the lowest average round-trip price of $1,235.

Which layover airport has the shortest travel time from Seattle to Kathmandu?

Flights connecting via Singapore (SIN) have the shortest average one-way travel time: 24h 15m.

Which layover airport has the shortest connection time from Seattle to Kathmandu?

Istanbul (IST) has the shortest average layover time for this route: 7h 11m.

When to book flights from Seattle to Kathmandu

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

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

Fastest flight time

Direct flights

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

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

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

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

What documentation or ID do you need to fly to Kathmandu Tribhuvan Airport?

What is the most popular airline from Seattle to Kathmandu?

Best airlines flying from Seattle to Kathmandu

Compare and see reviews for airlines that fly from Seattle to Kathmandu with momondo

Traveling to a place near Kathmandu?

Why use momondo?

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

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

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

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

An easier way to manage your Kathmandu 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.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Nepal

Fly your favorite airline to Kathmandu

Airlines are sorted and displayed according to clicks in the past 7 days on momondo