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Cheap flights from Seattle to Kathmandu from $420

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 8/14. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

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
11:10 pm - 8:45 am
KTM
-
SEA
22h 20m
1 stop
$910Singapore Airlines
Sun, Aug 16 - Wed, Sep 30
Singapore Airlines Logo
8:45 am - 9:50 pm
SEA
-
KTM
23h 20m
1 stop
Singapore Airlines Logo
11:00 pm - 7:10 am
KTM
-
SEA
45h 55m
1 stop
$939Singapore Airlines
Wed, Dec 2 - Wed, Jan 20
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
$940Singapore Airlines
Thu, Sep 10 - Thu, Sep 24
Multiple Airlines Logo
10:15 am - 9:30 pm
SEA
-
KTM
22h 30m
1 stop
Multiple Airlines Logo
11:10 pm - 9:40 pm
KTM
-
SEA
35h 15m
2 stops
$1,012Multiple Airlines
Fri, Aug 14 - Mon, Sep 28
Qatar Airways Logo
4:25 pm - 9:50 am
SEA
-
KTM
28h 40m
1 stop
Qatar Airways Logo
6:45 pm - 12:45 pm
KTM
-
SEA
30h 45m
1 stop
$1,050Qatar Airways
Thu, Sep 10 - Thu, Sep 24
Qatar Airways Logo
4:25 pm - 9:50 am
SEA
-
KTM
28h 40m
1 stop
Qatar Airways Logo
6:45 pm - 12:25 pm
KTM
-
SEA
30h 25m
1 stop
$1,051Qatar Airways
Thu, Sep 10 - Thu, Oct 1
Qatar Airways Logo
3:50 pm - 9:50 am
SEA
-
KTM
28h 15m
1 stop
Qatar Airways Logo
6:45 pm - 11:40 am
KTM
-
SEA
30h 40m
1 stop
$1,052Qatar Airways
Tue, Nov 10 - Thu, Dec 10
Qatar Airways Logo
4:25 pm - 9:50 am
SEA
-
KTM
28h 40m
1 stop
Qatar Airways Logo
10:05 am - 12:45 pm
KTM
-
SEA
39h 25m
1 stop
$1,053Qatar Airways
Tue, Aug 18 - Mon, Sep 14
Qatar Airways Logo
4:25 pm - 4:45 pm
SEA
-
KTM
35h 35m
1 stop
Qatar Airways Logo
6:00 pm - 12:25 pm
KTM
-
SEA
31h 10m
1 stop
$1,054Qatar Airways
Mon, Sep 21 - Wed, Oct 7
Qatar Airways Logo
4:25 pm - 8:50 am
SEA
-
KTM
27h 40m
1 stop
Qatar Airways Logo
6:45 pm - 12:25 pm
KTM
-
SEA
30h 25m
1 stop
$1,064Qatar Airways
Thu, Sep 10 - Fri, Oct 9

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Qatar Airways flights from Seattle to Kathmandu

Our best Qatar Airways deals on Seattle to Kathmandu flight tickets
Qatar Airways
Sep 10
SEA4:25 pmSeattle/Tacoma Intl
28h 40m
1 stop
KTM9:50 amKathmandu Tribhuvan
Sep 24
KTM6:45 pmKathmandu Tribhuvan
30h 45m
1 stop
SEA12:45 pmSeattle/Tacoma Intl
$1,050
Qatar Airways
Sep 10
SEA4:25 pmSeattle/Tacoma Intl
28h 40m
1 stop
KTM9:50 amKathmandu Tribhuvan
Oct 8
KTM6:45 pmKathmandu Tribhuvan
30h 25m
1 stop
SEA12:25 pmSeattle/Tacoma Intl
$1,051
Qatar Airways
Aug 18
SEA4:25 pmSeattle/Tacoma Intl
28h 40m
1 stop
KTM9:50 amKathmandu Tribhuvan
Sep 14
KTM10:05 amKathmandu Tribhuvan
39h 25m
1 stop
SEA12:45 pmSeattle/Tacoma Intl
$1,053

Cathay Pacific flights from Seattle to Kathmandu

Our best Cathay Pacific deals on Seattle to Kathmandu flight tickets
Cathay Pacific
Jul 13
SEA12:25 pmSeattle/Tacoma Intl
20h 35m
1 stop
KTM9:45 pmKathmandu Tribhuvan
Aug 9
KTM11:00 pmKathmandu Tribhuvan
24h 05m
1 stop
SEA10:20 amSeattle/Tacoma Intl
$1,719
Cathay Pacific
Jul 11
SEA12:25 pmSeattle/Tacoma Intl
20h 35m
1 stop
KTM9:45 pmKathmandu Tribhuvan
Aug 9
KTM11:00 pmKathmandu Tribhuvan
24h 05m
1 stop
SEA10:20 amSeattle/Tacoma Intl
$1,769

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 July 2, 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

Cheapest round-trip
Quickest round-trip

SeattleKathmandu

SEA - KTM

SEAKTM

Seattle/Tacoma Intl

Sun 8/16

10:15 am-9:30 pm

1 stop22h 30m

Kathmandu Tribhuvan

Wed 9/30

11:10 pm-8:45 am

1 stop22h 20m

$910

SeattleKathmandu

SEA - KTM

SEAKTM

Seattle/Tacoma Intl

Wed 12/2

8:45 am-9:50 pm

1 stop23h 20m

Kathmandu Tribhuvan

Wed 1/20

11:00 pm-7:10 am

1 stop45h 55m

$939

SeattleKathmandu

SEA - KTM

SEAKTM

Seattle/Tacoma Intl

Thu 9/10

10:15 am-9:30 pm

1 stop22h 30m

Kathmandu Tribhuvan

Thu 9/24

10:50 pm-8:45 am

1 stop22h 40m

$940

SeattleKathmandu

SEA - KTM

SEAKTM

Seattle/Tacoma Intl

Fri 8/14

10:15 am-9:30 pm

1 stop22h 30m

Kathmandu Tribhuvan

Mon 9/28

11:10 pm-9:40 pm

2 stops35h 15m

$1,012

SeattleKathmandu

SEA - KTM

SEAKTM

Seattle/Tacoma Intl

Thu 9/10

4:25 pm-9:50 am

1 stop28h 40m

Kathmandu Tribhuvan

Thu 9/24

6:45 pm-12:45 pm

1 stop30h 45m

$1,050

SeattleKathmandu

SEA - KTM

SEAKTM

Seattle/Tacoma Intl

Thu 9/10

4:25 pm-9:50 am

1 stop28h 40m

Kathmandu Tribhuvan

Thu 10/1

6:45 pm-12:25 pm

1 stop30h 25m

$1,051

SeattleKathmandu

SEA - KTM

SEAKTM

Seattle/Tacoma Intl

Tue 11/10

3:50 pm-9:50 am

1 stop28h 15m

Kathmandu Tribhuvan

Thu 12/10

6:45 pm-11:40 am

1 stop30h 40m

$1,052

SeattleKathmandu

SEA - KTM

SEAKTM

Seattle/Tacoma Intl

Tue 8/18

4:25 pm-9:50 am

1 stop28h 40m

Kathmandu Tribhuvan

Mon 9/14

10:05 am-12:45 pm

1 stop39h 25m

$1,053

SeattleKathmandu

SEA - KTM

SEAKTM

Seattle/Tacoma Intl

Mon 9/21

4:25 pm-4:45 pm

1 stop35h 35m

Kathmandu Tribhuvan

Wed 10/7

6:00 pm-12:25 pm

1 stop31h 10m

$1,054

SeattleKathmandu

SEA - KTM

SEAKTM

Seattle/Tacoma Intl

Thu 9/10

4:25 pm-8:50 am

1 stop27h 40m

Kathmandu Tribhuvan

Fri 10/9

6:45 pm-12:25 pm

1 stop30h 25m

$1,064

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 March is another great option to travel to Kathmandu, with average flight prices from Seattle averaging around $1,129.

How far in advance should I book a flight from Seattle 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 $1,298 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 $989 on momondo.

How have Seattle to Kathmandu flight prices changed over time?

As of July 2026, prices for Seattle to Kathmandu flights are approximately 13% 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

20h 35m

Direct flights

None
The fastest flight from Seattle to Kathmandu takes 20h 35m
There are no direct flights from Seattle to Kathmandu. There are no popular flight routes from Seattle to Kathmandu.
Search flight deals

Frequently asked questions about flying from Seattle to Kathmandu

  • 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 20h 35m.

  • 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 $813Free CancellationRating
8.2
1,557 reviews
Search Singapore Airlines flights
Cathay PacificPriceFrom $903Free CancellationRating
7.6
1,402 reviews
Search Cathay Pacific flights
Qatar AirwaysPriceFrom $944Free CancellationRating
7.3
3,737 reviews
Search Qatar Airways flights
Turkish AirlinesPriceFrom $967Free CancellationRating
7.4
4,435 reviews
Search Turkish Airlines flights
EmiratesPriceFrom $1,212Free CancellationRating
8.1
3,606 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.

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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
Qatar Airways
Cathay Pacific
Turkish Airlines
Emirates