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Cheap flights from Seattle to Kathmandu from $497

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 10/26. 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
0 bags

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Find the cheapest flights from Seattle to Kathmandu

Cheap round-trip flights

Singapore Airlines Logo
8:45 am - 9:40 pmSEA-KTM
23h 10m1 stop
Singapore Airlines Logo
11:00 pm - 8:10 amKTM-SEA
45h 55m1 stop
$959Singapore Airlines
Find Deal
Thu, Mar 5 - Sun, Mar 22
Singapore Airlines Logo
8:45 am - 9:40 pmSEA-KTM
23h 10m1 stop
Singapore Airlines Logo
11:00 pm - 8:10 amKTM-SEA
21h 55m1 stop
$965Singapore Airlines
Find Deal
Thu, Mar 5 - Sat, Mar 21
Singapore Airlines Logo
8:45 am - 9:50 pmSEA-KTM
23h 20m1 stop
Singapore Airlines Logo
11:05 pm - 7:10 amKTM-SEA
21h 50m1 stop
$979Singapore Airlines
Find Deal
Fri, Feb 27 - Fri, Mar 6
Logo
8:45 am - 9:50 pmSEA-KTM
23h 20m1 stop
Logo
11:00 pm - 6:54 pmKTM-SEA
32h 39m2 stops
$984
Find Deal
Tue, Feb 3 - Tue, Mar 31
Logo
8:45 am - 9:40 pmSEA-KTM
23h 10m1 stop
Logo
11:00 pm - 2:51 pmKTM-SEA
28h 36m2 stops
$1,052
Find Deal
Thu, Mar 5 - Sun, Mar 22
Emirates Logo
5:05 pm - 10:40 pmSEA-KTM
40h 50m1 stop
Emirates Logo
9:20 am - 12:35 pmKTM-SEA
41h 00m1 stop
$1,211Emirates
Find Deal
Sun, Oct 26 - Wed, Dec 10
Turkish Airlines Logo
7:00 pm - 11:10 amSEA-KTM
26h 25m1 stop
Turkish Airlines Logo
12:35 pm - 5:05 pmKTM-SEA
42h 15m1 stop
$1,251Turkish Airlines
Find Deal
Sun, Nov 2 - Mon, Jan 19
Turkish Airlines Logo
7:00 pm - 11:10 amSEA-KTM
26h 25m1 stop
Turkish Airlines Logo
12:35 pm - 5:05 pmKTM-SEA
42h 15m1 stop
$1,274Turkish Airlines
Find Deal
Sun, Nov 2 - Sun, Jan 18
Cathay Pacific Logo
6:20 am - 10:00 pmSEA-KTM
49h 55m2 stops
Cathay Pacific Logo
11:15 pm - 10:24 pmKTM-SEA
36h 54m2 stops
$1,392Cathay Pacific
Find Deal
Thu, Nov 6 - Mon, Nov 17
Cathay Pacific Logo
6:05 am - 10:00 pmSEA-KTM
50h 10m2 stops
Cathay Pacific Logo
11:15 pm - 6:20 pmKTM-SEA
32h 50m2 stops
$1,394Cathay Pacific
Find Deal
Fri, Nov 28 - Fri, Dec 5

Singapore Airlines flights from Seattle to Kathmandu

Our best Singapore Airlines deals on Seattle to Kathmandu flight tickets
Singapore Airlines
Mar 5
SEA8:45 amSeattle/Tacoma Intl
23h 10m
1 stop
KTM9:40 pmKathmandu Tribhuvan
Mar 22
KTM11:00 pmKathmandu Tribhuvan
45h 55m
1 stop
SEA8:10 amSeattle/Tacoma Intl
$959
Find similar
Singapore Airlines
Mar 5
SEA8:45 amSeattle/Tacoma Intl
23h 10m
1 stop
KTM9:40 pmKathmandu Tribhuvan
Mar 21
KTM11:00 pmKathmandu Tribhuvan
21h 55m
1 stop
SEA8:10 amSeattle/Tacoma Intl
$965
Find similar
Singapore Airlines
Feb 27
SEA8:45 amSeattle/Tacoma Intl
23h 20m
1 stop
KTM9:50 pmKathmandu Tribhuvan
Mar 6
KTM11:05 pmKathmandu Tribhuvan
21h 50m
1 stop
SEA7:10 amSeattle/Tacoma Intl
$979
Find similar

Turkish Airlines flights from Seattle to Kathmandu

Our best Turkish Airlines deals on Seattle to Kathmandu flight tickets
Turkish Airlines
Nov 2
SEA7:00 pmSeattle/Tacoma Intl
26h 25m
1 stop
KTM11:10 amKathmandu Tribhuvan
Jan 19
KTM12:35 pmKathmandu Tribhuvan
42h 15m
1 stop
SEA5:05 pmSeattle/Tacoma Intl
$1,251
Find similar
Turkish Airlines
Nov 2
SEA7:00 pmSeattle/Tacoma Intl
26h 25m
1 stop
KTM11:10 amKathmandu Tribhuvan
Jan 18
KTM12:35 pmKathmandu Tribhuvan
42h 15m
1 stop
SEA5:05 pmSeattle/Tacoma Intl
$1,274
Find similar
Turkish Airlines
Oct 7
SEA7:10 pmSeattle/Tacoma Intl
22h 20m
1 stop
KTM6:15 amKathmandu Tribhuvan
Oct 21
KTM7:40 amKathmandu Tribhuvan
22h 20m
1 stop
SEA5:15 pmSeattle/Tacoma Intl
$1,296
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 September 11, 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

Thu 3/5

8:45 am-9:40 pm

1 stop23h 10m

Kathmandu Tribhuvan

Sun 3/22

11:00 pm-8:10 am

1 stop45h 55m

$959

SeattleKathmandu

SEA - KTM

SEAKTM

Seattle/Tacoma Intl

Thu 3/5

8:45 am-9:40 pm

1 stop23h 10m

Kathmandu Tribhuvan

Sat 3/21

11:00 pm-8:10 am

1 stop21h 55m

$965

SeattleKathmandu

SEA - KTM

SEAKTM

Seattle/Tacoma Intl

Fri 2/27

8:45 am-9:50 pm

1 stop23h 20m

Kathmandu Tribhuvan

Fri 3/6

11:05 pm-7:10 am

1 stop21h 50m

$979

SeattleKathmandu

SEA - KTM

SEAKTM

Seattle/Tacoma Intl

Tue 2/3

8:45 am-9:50 pm

1 stop23h 20m

Kathmandu Tribhuvan

Tue 3/31

11:00 pm-6:54 pm

2 stops32h 39m

$984

SeattleKathmandu

SEA - KTM

SEAKTM

Seattle/Tacoma Intl

Thu 3/5

8:45 am-9:40 pm

1 stop23h 10m

Kathmandu Tribhuvan

Sun 3/22

11:00 pm-2:51 pm

2 stops28h 36m

$1,052

SeattleKathmandu

SEA - KTM

SEAKTM

Seattle/Tacoma Intl

Sun 10/26

5:05 pm-10:40 pm

1 stop40h 50m

Kathmandu Tribhuvan

Wed 12/10

9:20 am-12:35 pm

1 stop41h 00m

$1,211

SeattleKathmandu

SEA - KTM

SEAKTM

Seattle/Tacoma Intl

Sun 11/2

7:00 pm-11:10 am

1 stop26h 25m

Kathmandu Tribhuvan

Mon 1/19

12:35 pm-5:05 pm

1 stop42h 15m

$1,251

SeattleKathmandu

SEA - KTM

SEAKTM

Seattle/Tacoma Intl

Sun 11/2

7:00 pm-11:10 am

1 stop26h 25m

Kathmandu Tribhuvan

Sun 1/18

12:35 pm-5:05 pm

1 stop42h 15m

$1,274

SeattleKathmandu

SEA - KTM

SEAKTM

Seattle/Tacoma Intl

Thu 11/6

6:20 am-10:00 pm

2 stops49h 55m

Kathmandu Tribhuvan

Mon 11/17

11:15 pm-10:24 pm

2 stops36h 54m

$1,392

SeattleKathmandu

SEA - KTM

SEAKTM

Seattle/Tacoma Intl

Fri 11/28

6:05 am-10:00 pm

2 stops50h 10m

Kathmandu Tribhuvan

Fri 12/5

11:15 pm-6:20 pm

2 stops32h 50m

$1,394

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 January is another great option to travel to Kathmandu, with average flight prices from Seattle averaging around $1,221.

What is the cheapest Seattle/Tacoma Intl to Kathmandu Tribhuvan flight route?

Fly from Seattle/Tacoma Intl to Kathmandu Tribhuvan for the best Seattle/Tacoma Intl - Kathmandu Tribhuvan flight prices

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 $1,359 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 $1,115 on momondo.

What cabin class options are available on Seattle/Tacoma Intl to Kathmandu Tribhuvan flights?

There is only 1 cabin class available to choose from on Seattle/Tacoma Intl to Kathmandu Tribhuvan flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

How have Seattle to Kathmandu flight prices changed over time?

As of September 2025, prices for Seattle to Kathmandu flights are approximately 10% 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

Direct flights

None
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 20m.

  • 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 $910Free CancellationRating
8.1
1,365 reviews
Search Singapore Airlines flights
Turkish AirlinesPriceFrom $1,092Free CancellationRating
7.3
3,968 reviews
Search Turkish Airlines flights
EmiratesPriceFrom $1,138Free CancellationRating
8.1
3,334 reviews
Search Emirates flights
Qatar AirwaysPriceFrom $1,149Free CancellationRating
7.4
3,624 reviews
Search Qatar Airways flights
Cathay PacificPriceFrom $1,179Free CancellationRating
7.6
993 reviews
Search Cathay Pacific 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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Airlines are sorted and displayed according to clicks in the past 7 days on momondo
Delta
American Airlines
United Airlines
Turkish Airlines
Lufthansa
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British Airways
Qatar Airways
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Alaska Airlines