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Cheap flights from Seattle to Kathmandu from $323

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 4/7. 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

Enter your travel dates to find the best prices.
Singapore Airlines Logo
10:15 am - 9:30 pm
SEA
-
KTM
22h 30m
1 stop
Singapore Airlines Logo
10:50 pm - 8:45 am
KTM
-
SEA
22h 40m
1 stop
$699Singapore Airlines
Sat, May 23 - Sat, Jun 13
Cathay Pacific Logo
12:25 pm - 9:45 pm
SEA
-
KTM
20h 35m
1 stop
Cathay Pacific Logo
11:00 pm - 10:20 am
KTM
-
SEA
24h 05m
1 stop
$897Cathay Pacific
Mon, Aug 3 - Sun, Aug 30
Singapore Airlines Logo
10:15 am - 9:30 pm
SEA
-
KTM
22h 30m
1 stop
Singapore Airlines Logo
10:50 pm - 8:45 am
KTM
-
SEA
22h 40m
1 stop
$912Singapore Airlines
Tue, May 5 - Fri, May 22
Multiple Airlines Logo
4:10 pm - 9:50 am
SEA
-
KTM
28h 55m
2 stops
Multiple Airlines Logo
4:40 pm - 12:20 pm
KTM
-
SEA
32h 25m
2 stops
$929Multiple Airlines
Sun, Mar 22 - Wed, May 6
Multiple Airlines Logo
10:15 am - 9:30 pm
SEA
-
KTM
22h 30m
1 stop
Multiple Airlines Logo
10:50 pm - 8:59 pm
KTM
-
SEA
34h 54m
2 stops
$963Multiple Airlines
Sat, May 16 - Sun, May 31
Cathay Pacific Logo
6:21 pm - 9:30 pm
SEA
-
KTM
38h 24m
2 stops
Cathay Pacific Logo
11:00 pm - 10:05 am
KTM
-
SEA
23h 50m
1 stop
$966Cathay Pacific
Mon, Mar 9 - Sun, Apr 12
Singapore Airlines Logo
10:15 am - 9:30 pm
SEA
-
KTM
22h 30m
1 stop
Singapore Airlines Logo
10:50 pm - 8:45 am
KTM
-
SEA
22h 40m
1 stop
$974Singapore Airlines
Sun, Apr 19 - Thu, May 7
Cathay Pacific Logo
12:25 pm - 9:45 pm
SEA
-
KTM
20h 35m
1 stop
Cathay Pacific Logo
11:00 pm - 10:20 am
KTM
-
SEA
24h 05m
1 stop
$975Cathay Pacific
Mon, Aug 3 - Mon, Aug 31
Cathay Pacific Logo
12:25 pm - 9:45 pm
SEA
-
KTM
20h 35m
1 stop
Cathay Pacific Logo
11:00 pm - 10:20 am
KTM
-
SEA
24h 05m
1 stop
$982Cathay Pacific
Mon, Aug 3 - Wed, Aug 26
Cathay Pacific Logo
5:50 pm - 9:30 pm
SEA
-
KTM
62h 55m
2 stops
Cathay Pacific Logo
11:00 pm - 10:05 am
KTM
-
SEA
23h 50m
1 stop
$986Cathay Pacific
Sun, Mar 8 - Sun, Apr 12

Singapore Airlines flights from Seattle to Kathmandu

Our best Singapore Airlines deals on Seattle to Kathmandu flight tickets
Singapore Airlines
May 23
SEA10:15 amSeattle/Tacoma Intl
22h 30m
1 stop
KTM9:30 pmKathmandu Tribhuvan
Jun 13
KTM10:50 pmKathmandu Tribhuvan
22h 40m
1 stop
SEA8:45 amSeattle/Tacoma Intl
$699
Singapore Airlines
May 5
SEA10:15 amSeattle/Tacoma Intl
22h 30m
1 stop
KTM9:30 pmKathmandu Tribhuvan
May 22
KTM10:50 pmKathmandu Tribhuvan
22h 40m
1 stop
SEA8:45 amSeattle/Tacoma Intl
$912
Singapore Airlines
Apr 19
SEA10:15 amSeattle/Tacoma Intl
22h 30m
1 stop
KTM9:30 pmKathmandu Tribhuvan
May 7
KTM10:50 pmKathmandu Tribhuvan
22h 40m
1 stop
SEA8:45 amSeattle/Tacoma Intl
$974

Turkish Airlines flights from Seattle to Kathmandu

Our best Turkish Airlines deals on Seattle to Kathmandu flight tickets
Turkish Airlines
Mar 3
SEA7:00 pmSeattle/Tacoma Intl
26h 25m
1 stop
KTM11:10 amKathmandu Tribhuvan
Mar 10
KTM12:35 pmKathmandu Tribhuvan
43h 13m
2 stops
SEA7:03 pmSeattle/Tacoma Intl
$1,004
Turkish Airlines
Mar 3
SEA7:00 pmSeattle/Tacoma Intl
26h 25m
1 stop
KTM11:10 amKathmandu Tribhuvan
Mar 10
KTM12:35 pmKathmandu Tribhuvan
42h 15m
1 stop
SEA6:05 pmSeattle/Tacoma Intl
$1,014
Turkish Airlines
Mar 3
SEA7:15 amSeattle/Tacoma Intl
38h 10m
2 stops
KTM11:10 amKathmandu Tribhuvan
Mar 10
KTM12:35 pmKathmandu Tribhuvan
43h 13m
2 stops
SEA7:03 pmSeattle/Tacoma Intl
$1,026

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 February 5, 2026.
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

Sat 5/23

10:15 am-9:30 pm

1 stop22h 30m

Kathmandu Tribhuvan

Sat 6/13

10:50 pm-8:45 am

1 stop22h 40m

$699

SeattleKathmandu

SEA - KTM

SEAKTM

Seattle/Tacoma Intl

Mon 8/3

12:25 pm-9:45 pm

1 stop20h 35m

Kathmandu Tribhuvan

Sun 8/30

11:00 pm-10:20 am

1 stop24h 05m

$897

SeattleKathmandu

SEA - KTM

SEAKTM

Seattle/Tacoma Intl

Tue 5/5

10:15 am-9:30 pm

1 stop22h 30m

Kathmandu Tribhuvan

Fri 5/22

10:50 pm-8:45 am

1 stop22h 40m

$912

SeattleKathmandu

SEA - KTM

SEAKTM

Seattle/Tacoma Intl

Sun 3/22

4:10 pm-9:50 am

2 stops28h 55m

Kathmandu Tribhuvan

Wed 5/6

4:40 pm-12:20 pm

2 stops32h 25m

$929

SeattleKathmandu

SEA - KTM

SEAKTM

Seattle/Tacoma Intl

Sat 5/16

10:15 am-9:30 pm

1 stop22h 30m

Kathmandu Tribhuvan

Sun 5/31

10:50 pm-8:59 pm

2 stops34h 54m

$963

SeattleKathmandu

SEA - KTM

SEAKTM

Seattle/Tacoma Intl

Mon 3/9

6:21 pm-9:30 pm

2 stops38h 24m

Kathmandu Tribhuvan

Sun 4/12

11:00 pm-10:05 am

1 stop23h 50m

$966

SeattleKathmandu

SEA - KTM

SEAKTM

Seattle/Tacoma Intl

Sun 4/19

10:15 am-9:30 pm

1 stop22h 30m

Kathmandu Tribhuvan

Thu 5/7

10:50 pm-8:45 am

1 stop22h 40m

$974

SeattleKathmandu

SEA - KTM

SEAKTM

Seattle/Tacoma Intl

Mon 8/3

12:25 pm-9:45 pm

1 stop20h 35m

Kathmandu Tribhuvan

Mon 8/31

11:00 pm-10:20 am

1 stop24h 05m

$975

SeattleKathmandu

SEA - KTM

SEAKTM

Seattle/Tacoma Intl

Mon 8/3

12:25 pm-9:45 pm

1 stop20h 35m

Kathmandu Tribhuvan

Wed 8/26

11:00 pm-10:20 am

1 stop24h 05m

$982

SeattleKathmandu

SEA - KTM

SEAKTM

Seattle/Tacoma Intl

Sun 3/8

5:50 pm-9:30 pm

2 stops62h 55m

Kathmandu Tribhuvan

Sun 4/12

11:00 pm-10:05 am

1 stop23h 50m

$986

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 typical price of a round-trip flight between Seattle and Kathmandu?

What is the cheapest month to fly to Kathmandu?

The month of October is another great option to travel to Kathmandu, with average flight prices from Seattle averaging around $1,197.

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 February 2026, prices for Seattle to Kathmandu flights are approximately 49% cheaper 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 30m

Direct flights

None
The fastest flight from Seattle to Kathmandu takes 22h 30m
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 30m.

  • 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 $896Free CancellationRating
8.2
1,451 reviews
Search Singapore Airlines flights
Qatar AirwaysPriceFrom $984Free CancellationRating
7.4
3,728 reviews
Search Qatar Airways flights
Turkish AirlinesPriceFrom $1,003Free CancellationRating
7.3
4,210 reviews
Search Turkish Airlines flights
Cathay PacificPriceFrom $1,034Free CancellationRating
7.6
1,159 reviews
Search Cathay Pacific flights
EmiratesPriceFrom $1,138Free CancellationRating
8.1
3,506 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