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Kathmandu

$379+ Cheap flights from Seattle (SEA) to Kathmandu (KTM)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/10. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — KTM
ago. 19 — ago. 261
mar. 8/19
mar. 8/26
1 adult, Economy
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Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Kathmandu Tribhuvan are usually found in April or January, booked 15 days in advance, depart on a Tuesday or Monday and return on a Saturday

Cheap flight deals from Seattle to Kathmandu

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Kathmandu (KTM). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated agosto 14, 2025.

Round-trip from

$972
(Trip.com)

One-way from

$379
(oojo)

Popular in

June

Cheapest in

April

Average price

$1,240
From Seattle/Tacoma Intl to Kathmandu Tribhuvan
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One-way flight from Seattle/Tacoma Intl to Kathmandu Tribhuvan
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Highest demand for flights based on searches. 6% potential increase in price ($90 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($18 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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Find flight deals from Seattle to Kathmandu

Cheapest flights from Seattle to Kathmandu
Explore the most affordable flight options available from Seattle to Kathmandu. Find the lowest fares from popular airlines and budget airlines, with prices last updated on agosto 14, 2025.

This oojo deal was found by Cheapflights users on 8/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 12/268:45 amSEA - KTM
1 stop23h 20mSingapore Airlines
mar. 1/1311:00 pmKTM - SEA
1 stop45h 55mSingapore Airlines
Deal found 8/13$1,033
This oojo deal was found by Cheapflights users on 8/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 9/1011:59 pmSEA - KTM
2 stops31h 21mAir India
mié. 9/176:30 amKTM - SEA
2 stops52h 39mAir India
Deal found 8/13$1,071
This SmartFares deal was found by Cheapflights users on 8/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 9/118:08 pmSEA - KTM
2 stops38h 07mMultiple Airlines
jue. 9/185:30 pmKTM - SEA
2 stops41h 06mMultiple Airlines
Deal found 8/14$1,073
This SmartFares deal was found by Cheapflights users on 8/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 8/278:08 pmSEA - KTM
2 stops36h 52mMultiple Airlines
mié. 9/311:00 pmKTM - SEA
2 stops30h 43mMultiple Airlines
Deal found 8/13$1,122
This Justfly.com deal was found by Cheapflights users on 8/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 12/28:45 amSEA - KTM
1 stop23h 20mSingapore Airlines
mar. 1/1311:00 pmKTM - SEA
2 stops28h 37mSingapore Airlines
Deal found 8/13$1,129
This Orbitz deal was found by Cheapflights users on 8/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 9/128:08 pmSEA - KTM
2 stops35h 12mMultiple Airlines
vie. 9/199:00 pmKTM - SEA
2 stops28h 12mMultiple Airlines
Deal found 8/13$1,132
This Orbitz deal was found by Cheapflights users on 8/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 8/208:00 pmSEA - KTM
2 stops35h 20mMultiple Airlines
sáb. 9/209:00 pmKTM - SEA
2 stops39h 27mMultiple Airlines
Deal found 8/13$1,144
This FlightHub deal was found by Cheapflights users on 8/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 11/137:00 pmSEA - KTM
1 stop26h 25mTurkish Airlines
mar. 11/2512:35 pmKTM - SEA
1 stop42h 15mTurkish Airlines
Deal found 8/14$1,146
This Trip.com deal was found by Cheapflights users on 8/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 10/17:10 pmSEA - KTM
2 stops34h 15mMultiple Airlines
mar. 10/71:25 pmKTM - SEA
2 stops40h 35mMultiple Airlines
Deal found 8/13$1,167
This oojo deal was found by Cheapflights users on 8/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 9/1111:59 pmSEA - KTM
2 stops31h 21mAir India
jue. 9/1810:05 amKTM - SEA
2 stops49h 04mAir India
Deal found 8/14$1,178
This oojo deal was found by Cheapflights users on 8/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 9/1211:59 pmSEA - KTM
2 stops31h 21mAir India
vie. 10/172:00 pmKTM - SEA
2 stops44h 55mAir India
Deal found 8/14$1,179

Cheapflights 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, Cheapflights users made 2,558,603 searches. Data last updated agosto 14, 2025.
Use the filters below to find and compare flights from Seattle to Kathmandu that are best for you.

Fly from

Seattle

Fly to

Kathmandu

Route

Depart

Return

Price

SeattleKathmandu

SEA - KTM

SEAKTM

Seattle/Tacoma Intl

mié. 9/10

11:59 pm-8:05 pm

2 stops31h 21m

Kathmandu Tribhuvan

mié. 9/17

6:30 am-10:24 pm

2 stops52h 39m

$1,071

SeattleKathmandu

SEA - KTM

SEAKTM

Seattle/Tacoma Intl

jue. 9/11

8:08 pm-11:00 pm

2 stops38h 07m

Kathmandu Tribhuvan

jue. 9/18

5:30 pm-9:51 pm

2 stops41h 06m

$1,073

SeattleKathmandu

SEA - KTM

SEAKTM

Seattle/Tacoma Intl

jue. 8/28

8:08 pm-9:45 pm

2 stops36h 52m

Kathmandu Tribhuvan

jue. 9/4

11:00 pm-9:36 pm

2 stops35h 21m

$1,144

SeattleKathmandu

SEA - KTM

SEAKTM

Seattle/Tacoma Intl

jue. 11/13

7:00 pm-11:10 am

1 stop26h 25m

Kathmandu Tribhuvan

mar. 11/25

12:35 pm-5:05 pm

1 stop42h 15m

$1,146

SeattleKathmandu

SEA - KTM

SEAKTM

Seattle/Tacoma Intl

jue. 9/11

11:59 pm-8:05 pm

2 stops31h 21m

Kathmandu Tribhuvan

jue. 9/18

10:05 am-10:24 pm

2 stops49h 04m

$1,178

SeattleKathmandu

SEA - KTM

SEAKTM

Seattle/Tacoma Intl

vie. 9/12

11:59 pm-8:05 pm

2 stops31h 21m

Kathmandu Tribhuvan

vie. 10/17

7:35 am-10:10 pm

2 stops51h 20m

$1,179

SeattleKathmandu

SEA - KTM

SEAKTM

Seattle/Tacoma Intl

jue. 9/11

11:59 pm-11:00 pm

2 stops34h 16m

Kathmandu Tribhuvan

mar. 10/7

2:00 pm-10:10 pm

2 stops44h 55m

$1,179

SeattleKathmandu

SEA - KTM

SEAKTM

Seattle/Tacoma Intl

jue. 10/30

8:00 pm-6:35 pm

2 stops33h 50m

Kathmandu Tribhuvan

dom. 11/30

1:45 pm-5:05 pm

2 stops41h 05m

$1,205

SeattleKathmandu

SEA - KTM

SEAKTM

Seattle/Tacoma Intl

jue. 11/13

1:31 pm-10:00 pm

2 stops42h 44m

Kathmandu Tribhuvan

mié. 12/3

11:15 pm-2:53 pm

2 stops53h 23m

$1,228

SeattleKathmandu

SEA - KTM

SEAKTM

Seattle/Tacoma Intl

lun. 9/1

11:37 am-9:45 pm

2 stops45h 23m

Kathmandu Tribhuvan

jue. 10/2

11:00 pm-4:58 pm

2 stops30h 43m

$1,249

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/14

Showing 1-10 of 21 results
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Best time to book a flight from Seattle to Kathmandu

Have a flexible travel schedule? Discover the best time to fly to Kathmandu from Seattle with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Seattle to Kathmandu

How far ahead should I book a flight from Seattle to Kathmandu?

Use this chart to determine the optimal time to book a round-trip flight from Seattle to Kathmandu. Price data was last updated on August 8, 2025.

Booking 15 days in advance of your planned departure date is, on average, the best time to get cheap flights from Seattle to Kathmandu. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest month to book a flight from Seattle to Kathmandu?

Currently, August is the cheapest month in which you can book a flight from Seattle to Kathmandu (average of $1,229). Flying from Seattle to Kathmandu in June is currently the most expensive (average of $1,683). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from SEA to KTM?

Find hourly flight availability from Seattle to Kathmandu. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated agosto 14, 2025.

One of the essential ways to save on airfare from Seattle to Kathmandu is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight at noon could potentially save you up to 5% on airfare.

What’s the top layover airport for flights from Seattle to Kathmandu?

Share of 1-stop round-trip flights from Seattle to Kathmandu chosen by Cheapflights users in the past 12 months, using the same layover each way.

Doha (DOH) – chosen by Cheapflights users on 67% of 1-stop itineraries from Seattle to Kathmandu on Cheapflights.

What’s the cheapest layover airport for flights from Seattle to Kathmandu?

Average round-trip fare for 1-stop flights from Seattle to Kathmandu, chosen by Cheapflights users in the past 12 months, with the same layover each way.

Singapore (SIN) is the most affordable 1-stop option, with an average round-trip price of $1,677.

What’s the fastest layover option from Seattle to Kathmandu?

Shortest average travel time for 1-stop one-way flights from Seattle to Kathmandu, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.

Flights via Singapore (SIN) have the shortest average one-way travel time for 1-stop routes: 22h 45m.

Which airport typically offers the quickest layover for flights from Seattle to Kathmandu?

Average layover duration for 1-stop one-way flights from Seattle to Kathmandu, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Flights via Doha (DOH) offer the fastest connection on this route, with an average layover time of 11h 49m.

Reviews of airlines servicing Kathmandu

Get insights into the airlines that provide service to Kathmandu. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Kathmandu. Reviews last updated agosto 14, 2025.
See what other customers who have flown with Singapore Airlines, Cathay Pacific, and Qatar Airways from Seattle to Kathmandu have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Singapore Airlines
8.1
Very good
1,346 reviews

Comfort

8.0

Entertainment

8.0

Crew

8.6

Food

7.7

Boarding

8.2

Overall

8.1

Reviews

1 / 20
2.0
Mediocre

Ketan,Nov 2024

SIN - AMD

Food was not good. It was like few days old.
Singapore Airlines
8.1
Very good
1,346 reviews
Singapore Airlines
8.1
Very good
1,346 reviews

Comfort

8.0

Entertainment

8.0

Crew

8.6

Food

7.7

Boarding

8.2

Overall

8.1

Reviews

1 / 20
2.0
Mediocre

Ketan,Nov 2024

SIN - AMD

Food was not good. It was like few days old.
Cathay Pacific
7.6
Good
968 reviews
Singapore Airlines
8.1
Very good
1,346 reviews

Comfort

8.0

Entertainment

8.0

Crew

8.6

Food

7.7

Boarding

8.2

Overall

8.1

Reviews

1 / 20
2.0
Mediocre

Ketan,Nov 2024

SIN - AMD

Food was not good. It was like few days old.
Qatar Airways
7.4
Good
3,608 reviews
Singapore Airlines
8.1
Very good
1,346 reviews

Comfort

8.0

Entertainment

8.0

Crew

8.6

Food

7.7

Boarding

8.2

Overall

8.1

Reviews

1 / 20
2.0
Mediocre

Ketan,Nov 2024

SIN - AMD

Food was not good. It was like few days old.
Turkish Airlines
7.3
Good
3,940 reviews
Singapore Airlines
8.1
Very good
1,346 reviews

Comfort

8.0

Entertainment

8.0

Crew

8.6

Food

7.7

Boarding

8.2

Overall

8.1

Reviews

1 / 20
2.0
Mediocre

Ketan,Nov 2024

SIN - AMD

Food was not good. It was like few days old.

Related info for your journey

Find useful and relevant information for your journey from Seattle to Kathmandu. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What are the cheapest airlines flying from Seattle to Kathmandu round-trip?

    Singapore Airlines, at $909, was found to be the cheapest airline from Seattle to Kathmandu.Alternate airlines to your destination round-trip include Turkish Airlines and Qatar Airways. Singapore Airlines is 33% cheaper than the average price of flights available within the next 90 days to this destination.

  • Where are the most common layover locations when flying from Seattle to Kathmandu?

    Flights departing from Seattle and landing in Kathmandu layover in Singapore most frequently. Istanbul is the second most popular location for layovers on flights from Seattle to Kathmandu.

  • What are some popular things to do or see while on a layover in Singapore?

    Singapore travelers tend to visit Sentosa, Universal Studios Singapore, and Geylang Serai New Market more than anywhere else. Travelers on a layover in Singapore can visit Sentosa, Universal Studios Singapore, and Geylang Serai New Market, by traveling 13.4 mi, 13.4 mi, and 6.9 mi, respectively after landing at Singapore Changi. Those landing in Singapore looking to spend some time exploring during their layover can rent a car for about $92 per day.

  • What are some popular points of interest to see during a layover in Istanbul?

    Taksim Square, Beyazit Meydani, and Sultan Ahmet Camii are the most popular attractions in Istanbul if you're in need of something to do during your layover. Taksim Square, Beyazit Meydani, and Sultan Ahmet Camii can be accessed by traveling approximately 20.8 mi, 21.7 mi, and 22.3 mi, respectively from Istanbul. Those on a layover in Istanbul in need of a rental car can book one at Istanbul for about $51.

  • Where are the least popular layover locations for Seattle to Kathmandu flights?

    Seattle to Kathmandu flights have a layover in Doha least often.

  • Can I find deals for flights from Seattle to Kathmandu that include hotel bookings?

    Yes. In addition to deals on Seattle to Kathmandu flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Seattle to Kathmandu?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Seattle to Kathmandu.

  • Can I find deals for business class flights from Seattle to Kathmandu?

    Yes. Cheapflights offers flight deals from Seattle to Kathmandu by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Seattle to Kathmandu?

    Currently, August is the cheapest month in which you can book a flight from Seattle to Kathmandu (average of $1,229). Flying from Seattle to Kathmandu in June is currently the most expensive (average of $1,683). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Kathmandu?

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

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Alternative routes for Seattle to Kathmandu

See prices for flight routes from nearby airports that may be better suited for you.
Portland to Kathmandu flights
Spokane to Kathmandu flights
Pullman to Kathmandu flights

Top 5 airlines flying from Seattle to Kathmandu

Discover the top 5 airlines that operate flights from Seattle to Kathmandu. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated agosto 14, 2025.
AirlineCheapestAverageFlexibilityOn-time
Singapore AirlinesCheapest$909Average$1,193FlexibilityNo cancel feeOn-time81%
Turkish AirlinesCheapest$1,096Average$1,360FlexibilityNo cancel feeOn-time77%
Qatar AirwaysCheapest$1,134Average$1,597FlexibilityNo cancel feeOn-time68%
EmiratesCheapest$1,138Average$1,710FlexibilityNo cancel feeOn-time75%
Cathay PacificCheapest$1,179Average$1,437FlexibilityNo cancel feeOn-time72%

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