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Cheap flights from Seattle to Kathmandu from $478

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 1/9. 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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0 bags

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Find the cheapest flights from Seattle to Kathmandu

Cheap round-trip flights

Enter your travel dates to find the best prices.
Singapore Airlines Logo
8:45 am - 9:50 pmSEA-KTM
23h 20m1 stop
Singapore Airlines Logo
11:05 pm - 8:10 amKTM-SEA
21h 50m1 stop
$808Singapore Airlines
Find Deal
Tue, Feb 3 - Wed, Mar 18
Singapore Airlines Logo
10:15 am - 9:45 pmSEA-KTM
22h 45m1 stop
Singapore Airlines Logo
11:00 pm - 8:45 amKTM-SEA
22h 30m1 stop
$906Singapore Airlines
Find Deal
Thu, May 14 - Thu, Jun 4
Singapore Airlines Logo
9:45 am - 9:50 pmSEA-KTM
23h 20m1 stop
Singapore Airlines Logo
11:00 pm - 8:45 amKTM-SEA
22h 30m1 stop
$909Singapore Airlines
Find Deal
Fri, Mar 20 - Mon, Apr 6
Singapore Airlines Logo
9:45 am - 9:50 pmSEA-KTM
23h 20m1 stop
Singapore Airlines Logo
11:00 pm - 8:45 amKTM-SEA
22h 30m1 stop
$922Singapore Airlines
Find Deal
Fri, Mar 27 - Mon, Apr 13
Singapore Airlines Logo
9:45 am - 9:50 pmSEA-KTM
23h 20m1 stop
Singapore Airlines Logo
11:00 pm - 8:45 amKTM-SEA
22h 30m1 stop
$943Singapore Airlines
Find Deal
Fri, Mar 27 - Mon, Apr 13
Singapore Airlines Logo
10:15 am - 9:45 pmSEA-KTM
22h 45m1 stop
Singapore Airlines Logo
11:00 pm - 8:45 amKTM-SEA
22h 30m1 stop
$946Singapore Airlines
Find Deal
Sat, May 23 - Mon, Jun 8
Singapore Airlines Logo
8:45 am - 9:50 pmSEA-KTM
23h 20m1 stop
Singapore Airlines Logo
11:00 pm - 7:10 amKTM-SEA
21h 55m1 stop
$953Singapore Airlines
Find Deal
Fri, Jan 16 - Wed, Feb 11
Singapore Airlines Logo
9:45 am - 9:50 pmSEA-KTM
23h 20m1 stop
Singapore Airlines Logo
11:00 pm - 8:45 amKTM-SEA
22h 30m1 stop
$956Singapore Airlines
Find Deal
Fri, Mar 27 - Mon, Apr 13
Singapore Airlines Logo
10:15 am - 9:45 pmSEA-KTM
22h 45m1 stop
Singapore Airlines Logo
11:00 pm - 8:45 amKTM-SEA
22h 30m1 stop
$959Singapore Airlines
Find Deal
Thu, Apr 16 - Thu, May 21
Singapore Airlines Logo
9:45 am - 9:40 pmSEA-KTM
23h 10m1 stop
Singapore Airlines Logo
11:00 pm - 8:45 amKTM-SEA
22h 30m1 stop
$963Singapore Airlines
Find Deal
Tue, Mar 24 - Fri, Apr 17

Qatar Airways flights from Seattle to Kathmandu

Our best Qatar Airways deals on Seattle to Kathmandu flight tickets
Qatar Airways
Jan 5
SEA4:05 pmSeattle/Tacoma Intl
36h 00m
1 stop
KTM5:50 pmKathmandu Tribhuvan
Jan 20
KTM5:40 pmKathmandu Tribhuvan
31h 45m
1 stop
SEA11:40 amSeattle/Tacoma Intl
$983
Find similar
Qatar Airways
Feb 3
SEA4:05 pmSeattle/Tacoma Intl
36h 00m
1 stop
KTM5:50 pmKathmandu Tribhuvan
Feb 19
KTM9:10 amKathmandu Tribhuvan
50h 23m
2 stops
SEA9:48 pmSeattle/Tacoma Intl
$1,014
Find similar
Qatar Airways
Jan 10
SEA4:05 pmSeattle/Tacoma Intl
36h 00m
1 stop
KTM5:50 pmKathmandu Tribhuvan
Feb 24
KTM5:40 pmKathmandu Tribhuvan
31h 45m
1 stop
SEA11:40 amSeattle/Tacoma Intl
$1,022
Find similar

Cathay Pacific flights from Seattle to Kathmandu

Our best Cathay Pacific deals on Seattle to Kathmandu flight tickets
Cathay Pacific
Apr 7
SEA11:50 amSeattle/Tacoma Intl
21h 10m
1 stop
KTM9:45 pmKathmandu Tribhuvan
May 5
KTM11:00 pmKathmandu Tribhuvan
23h 55m
1 stop
SEA10:10 amSeattle/Tacoma Intl
$966
Find similar
Cathay Pacific
May 4
SEA11:50 amSeattle/Tacoma Intl
21h 10m
1 stop
KTM9:45 pmKathmandu Tribhuvan
May 11
KTM11:00 pmKathmandu Tribhuvan
23h 55m
1 stop
SEA10:10 amSeattle/Tacoma Intl
$968
Find similar
Cathay Pacific
Apr 26
SEA7:55 pmSeattle/Tacoma Intl
61h 05m
2 stops
KTM9:45 pmKathmandu Tribhuvan
May 13
KTM11:00 pmKathmandu Tribhuvan
23h 55m
1 stop
SEA10:10 amSeattle/Tacoma Intl
$1,028
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Seattle to Kathmandu 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 November 26, 2025.
Use the filters below to find and compare flights from Seattle to Kathmandu that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

SeattleKathmandu

SEA - KTM

SEAKTM

Seattle/Tacoma Intl

Tue 2/3

8:45 am-9:50 pm

1 stop23h 20m

Kathmandu Tribhuvan

Wed 3/18

11:05 pm-8:10 am

1 stop21h 50m

$808

SeattleKathmandu

SEA - KTM

SEAKTM

Seattle/Tacoma Intl

Thu 5/14

10:15 am-9:45 pm

1 stop22h 45m

Kathmandu Tribhuvan

Thu 6/4

11:00 pm-8:45 am

1 stop22h 30m

$906

SeattleKathmandu

SEA - KTM

SEAKTM

Seattle/Tacoma Intl

Fri 3/20

9:45 am-9:50 pm

1 stop23h 20m

Kathmandu Tribhuvan

Mon 4/6

11:00 pm-8:45 am

1 stop22h 30m

$909

SeattleKathmandu

SEA - KTM

SEAKTM

Seattle/Tacoma Intl

Fri 3/27

9:45 am-9:50 pm

1 stop23h 20m

Kathmandu Tribhuvan

Mon 4/13

11:00 pm-8:45 am

1 stop22h 30m

$922

SeattleKathmandu

SEA - KTM

SEAKTM

Seattle/Tacoma Intl

Fri 3/27

9:45 am-9:50 pm

1 stop23h 20m

Kathmandu Tribhuvan

Mon 4/13

11:00 pm-8:45 am

1 stop22h 30m

$943

SeattleKathmandu

SEA - KTM

SEAKTM

Seattle/Tacoma Intl

Sat 5/23

10:15 am-9:45 pm

1 stop22h 45m

Kathmandu Tribhuvan

Mon 6/8

11:00 pm-8:45 am

1 stop22h 30m

$946

SeattleKathmandu

SEA - KTM

SEAKTM

Seattle/Tacoma Intl

Fri 1/16

8:45 am-9:50 pm

1 stop23h 20m

Kathmandu Tribhuvan

Wed 2/11

11:00 pm-7:10 am

1 stop21h 55m

$953

SeattleKathmandu

SEA - KTM

SEAKTM

Seattle/Tacoma Intl

Fri 3/27

9:45 am-9:50 pm

1 stop23h 20m

Kathmandu Tribhuvan

Mon 4/13

11:00 pm-8:45 am

1 stop22h 30m

$956

SeattleKathmandu

SEA - KTM

SEAKTM

Seattle/Tacoma Intl

Thu 4/16

10:15 am-9:45 pm

1 stop22h 45m

Kathmandu Tribhuvan

Thu 5/21

11:00 pm-8:45 am

1 stop22h 30m

$959

SeattleKathmandu

SEA - KTM

SEAKTM

Seattle/Tacoma Intl

Tue 3/24

9:45 am-9:40 pm

1 stop23h 10m

Kathmandu Tribhuvan

Fri 4/17

11:00 pm-8:45 am

1 stop22h 30m

$963

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 Kathmandu from

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

What is the cheapest month to fly to Kathmandu?

The month of April is another great option to travel to Kathmandu, with average flight prices from Seattle averaging around $1,172.

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 $1,325 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 November 2025, prices for Seattle to Kathmandu flights are approximately 4% 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

21h 10m

Direct flights

None
The fastest flight from Seattle to Kathmandu takes 21h 10m
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 21h 10m.

  • 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?

  • 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?

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 AirlinesPriceFrom $898Free CancellationRating
8.1
1,410 reviews
Search Singapore Airlines flights
Qatar AirwaysPriceFrom $992Free CancellationRating
7.4
3,677 reviews
Search Qatar Airways flights
Turkish AirlinesPriceFrom $1,048Free CancellationRating
7.3
4,063 reviews
Search Turkish Airlines flights
Cathay PacificPriceFrom $1,104Free CancellationRating
7.6
1,072 reviews
Search Cathay Pacific flights
EmiratesPriceFrom $1,138Free CancellationRating
8.1
3,422 reviews
Search Emirates flights

Traveling to a place near Kathmandu?

Book flights to Kathmandu if you plan to visit one of these locations
Nagarkot

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

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Fly your favorite airline to Kathmandu

Airlines are sorted and displayed according to clicks in the past 7 days on momondo
Singapore Airlines
Turkish Airlines
Qatar Airways
Emirates
Cathay Pacific