SEA - KTM

$546 Find Cheap Flights from Seattle to Kathmandu

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Seattle to Kathmandu departing on 7/28. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Kathmandu

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Seattle to Kathmandu, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Seattle to Kathmandu, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
$914
Typical prices: $1,597-$1,124
Singapore Airlines
Sal 8/18Çar 9/16
SEA - KTM • 1 stop
Cheapest one-way
$546
Typical prices: $663-$1,021
Multiple Airlines
Sal 7/28
SEA - KTM • 2 stops
Top airlines
Cheapest • from $914 (round-trip)
Best reviews • 8.2 score
Airline reviews
Airline reviews
+1
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Airline reviews
Airline reviews
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Nonstop flights
Not available
There are currently no direct flights between Seattle and Kathmandu. You'll need at least 1 connection.
Insights
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Top layover airports
Cheapest • Avg $1,764 (round-trip)
Shortest trip • 21h 07m (one-way)
Insights
Insights
Insights
Insights
When to book
in advance
Our data shows that travelers who book at least 3 weeks in advance save around 27% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
Cheapest • 22% price drop
Most popular
Good to know
Good to know
+1
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Good to know
Good to know
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Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Kathmandu!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Seattle to Kathmandu (SEA-KTM)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Seattle to Kathmandu that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Seattle to Kathmandu

Sal, Ağu 18 - Çar, Eyl 16
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
$914Singapore Airlines
Sal, Eyl 1 - Çar, Eyl 30
Qatar Airways Logo
4:25 pm - 8:50 am
SEA
-
KTM
27h 40m
1 stop
Qatar Airways Logo
6:00 pm - 12:25 pm
KTM
-
SEA
31h 10m
1 stop
$1,070Qatar Airways
Sal, Eki 6 - Per, Kas 12
Qatar Airways Logo
4:25 pm - 5:30 pm
SEA
-
KTM
36h 20m
1 stop
Qatar Airways Logo
5:40 pm - 11:40 am
KTM
-
SEA
31h 45m
1 stop
$1,083Qatar Airways
Sal, Eyl 1 - Çar, Eyl 30
Multiple Airlines Logo
4:25 pm - 8:50 am
SEA
-
KTM
27h 40m
1 stop
Multiple Airlines Logo
6:45 pm - 9:43 pm
KTM
-
SEA
39h 43m
2 stops
$1,085Multiple Airlines
Sal, Eyl 15 - Çar, Eki 7
Multiple Airlines Logo
4:25 pm - 8:50 am
SEA
-
KTM
27h 40m
1 stop
Multiple Airlines Logo
6:00 pm - 6:56 pm
KTM
-
SEA
37h 41m
2 stops
$1,086Multiple Airlines
Sal, Eki 6 - Pzt, Eki 19
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
$1,088Qatar Airways
Paz, Eyl 13 - Çar, Eyl 30
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
$1,091Qatar Airways
Sal, Eki 6 - Pzt, Eki 19
Multiple Airlines Logo
4:25 pm - 9:50 am
SEA
-
KTM
28h 40m
1 stop
Multiple Airlines Logo
6:00 pm - 9:04 pm
KTM
-
SEA
39h 49m
2 stops
$1,102Multiple Airlines
Paz, Eyl 27 - Sal, Eki 13
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
$1,103Qatar Airways
Pzt, Ağu 31 - Çar, Eyl 30
Qatar Airways Logo
4:25 pm - 8:50 am
SEA
-
KTM
27h 40m
1 stop
Qatar Airways Logo
6:00 pm - 12:25 pm
KTM
-
SEA
31h 10m
1 stop
$1,105Qatar Airways
Booking Insights

KAYAK's insights & trends for Seattle to Kathmandu flights

Get data-powered insights and trends into flights from Seattle to Kathmandu to help you find the cheapest flights, the best time to fly and much more.

How much is a round-trip flight from Seattle to Kathmandu?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Seattle to Kathmandu departing in August.

What is the cheapest month to fly from Seattle to Kathmandu?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Seattle to Kathmandu, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Seattle to Kathmandu is February, where tickets cost $1,019 (return) on average. On the other hand, the most expensive months are June and July, where the average cost of round-trip tickets is $1,498 and $1,484 respectively.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Seattle to Kathmandu, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Seattle to Kathmandu, you should book around 3 weeks before departure, which saves you about 27% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 26 weeks before departure.

Good to know

Low seasonDecember
Cheapest flight$546
Best time to beat the crowds but there is an average 13% increase in price.
Most popular time to fly with an average 9% increase in price.
Flight from Seattle to Kathmandu

When to book flights from Seattle to Kathmandu

Are your dates flexible? Find out the best times to travel from Seattle to Kathmandu based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Seattle to Kathmandu

  • Where can you get information at SEA?

    If you have any queries while at the airport, you can approach airport volunteers who are easily identifiable with their blue jackets. They are friendly and will offer whatever information you need concerning airport services. There are also customer services representatives who wear red vests and carry an iPad to help passengers with directions around the airport.

  • Is SEA baby-friendly?

    There are nursing rooms in the airport to provide mothers with the quiet and privacy needed to take care of their infants. The rooms are equipped with changing tables, sinks, rocking chairs, and power outlets. One is located inside the Kid's Play Area, at S Gate mezzanine level, Gates A9, C10, N2, D19, D23, and the main terminal at the train station. If you are a member of the military or related to one, you can use the nursing room inside the USO lounge located landside, mezzanine level, on the 2nd floor.

  • Are there lounges at KTM?

    If you wish to relax and unwind a little before leaving the airport, you can take advantage of the airport’s onsite lounges. The executive lounge is located on the 2nd floor of the international terminal, landside. Passengers traveling first or business class can access the Thai Airways Royal silk lounge at the international terminal, landside.

  • Can you find luggage trolleys at KTM?

    Perhaps you are heavy-laden with bags and need a hand. If so, you would be happy to know that there are trolleys available free of charge at the airport. You will find them on the upper and lower level of arrivals and in the baggage claim area.

  • What is the cheapest flight from Seattle to Kathmandu?

    In the last 3 days, the lowest price for a flight from Seattle to Kathmandu was $546 for a one-way ticket and $914 for a round-trip.

  • Do I need a passport to fly between Seattle and Kathmandu?

    Yes, you'll most likely have to show a valid passport before boarding the plane in Seattle and on arrival in Kathmandu.

  • Which aircraft models fly most regularly from Seattle to Kathmandu?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Seattle to Kathmandu?

    oneworld, and Star Alliance are the airline alliances operating flights between Seattle and Kathmandu, with oneworld being the most commonly used for this route.

  • What is the most popular layover when flying to Kathmandu from Seattle?

    Istanbul is the most popular layover city among KAYAK users traveling from Seattle to Kathmandu.

  • Which is the best airline for flights from Seattle to Kathmandu, Singapore Airlines or Emirates?

    The two airlines most popular with KAYAK users for flights from Seattle to Kathmandu are Singapore Airlines and Emirates. With an average price for the route of $1,167 and an overall rating of 8.2, Singapore Airlines is the most popular choice. Emirates is also a great choice for the route, with an average price of $1,341 and an overall rating of 8.1.

  • How does KAYAK find such low prices on flights from Seattle to Kathmandu?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Seattle to Kathmandu.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Seattle to Kathmandu?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Kathmandu from Seattle is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Seattle to Kathmandu?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Kathmandu with an airline and back to Seattle with another airline. Booking your flights between Seattle and KTM can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Seattle to Kathmandu?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Kathmandu from Seattle up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from Seattle to Kathmandu

  • On the day your flight from Seattle Airport (SEA) to Kathmandu Tribhuvan Airport (KTM) is scheduled, it is advisable to get to the airport at least 2 hours before departure. SEA requires all passengers to go through several security checkpoints to uphold security in the airport, which may be time-consuming. Arriving early at the airport reduces the risk of missing your flight.
  • If you still have time to kill before your flight, you could relax with a massage at SEA. There is a massage bar located airside in the N gates, and it is operational between 6 am and 7 pm during the weekdays and between 7 am and 8 pm during the weekends. A foot or chair massage will make you feel very relaxed before you board the flight to KTM.
  • Suppose you want to get to SEA from nearby towns using public transport. If that is the case, you have the option of using a bus, a taxi, or a train. King County Metro buses drop passengers on the street close to the airport next to the Sea-Tac Airport LINK Light rail station. Alternatively, you can use the LINK Light rail system to get to the airport, whose station is located on the 4th floor of the parking garage.
  • When you get to KTM, chances are that you will be exhausted because of the journey and the jetlag that comes with it. While there are no onsite hotels in the airport, there are several within walking distance. They include Hotel Marinha, Summit Residency, and Kathmandu Airport hotel.
  • If you wish to convert your currency from USD to rupees once you get to KTM, you can do so at the currency exchange counters in the Arrivals lounge of the full-service banking branch at the Departures lounge.

Reviews of the top 5 airlines serving from Seattle to Kathmandu

 
See real verified KAYAK customer reviews for airlines flying from Seattle to Kathmandu. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Seattle to Kathmandu? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.2
Singapore AirlinesOverall score based on 1505 reviews
8.3Boarding
8.6Crew
8.0Entertainment
7.8Food
8.0Comfort
Airline reviews

Really great service throughout and the food was really nice. I can highly recommend thank you very much.

10.0 ExcellentPeter, Apr 2026
LHR - BKI
Read more Singapore Airlines reviews

Really great service throughout and the food was really nice. I can highly recommend thank you very much.

I had ordered vegetarian food. What I was presented was extremely dissatisfying and not up to the mark. I pretty much did not eat entire 19 hours. For.an airline voted as best in business, it was extremely disappointing. Seats were not comfortable to sleep. Entertainment system didn’t have much choice. WiFi didn’t work for more than half the time. Cabin crew were also difficult to understand. A bit of diversity like Emirates crew would go a long way.

A little more room from the reclining seat in the front of me.

They ran out of the second choice of food was stuck with fish

First time flying with Singapore airlines and I’ll give them two thumbs up 👍 👍

I wish there was a little more leg room between the seats. The recline was good and seats overall were comfortable. I also didn’t like the 2-4-2 configuration.

toilets could be cleaned more frequently, everything else was pretty good.

The flight crew was phenominal! We couldn't have asked for any better. They were experienced professionals.

Wish the underseat compartment don’t have a restriction, can fit a personal item such as backpack fully like most Boeing

Service was top notch and the attention to passengers is great. Takeoff and landing was on schedule. Food selection is good

What a great trip . From check in to the upgrade we received a big shout out to Cleverson who was able to help us navigate the whole process super patient and was just one of the best customer service experiences we received in a very long time . The amazing staff on the flight who went above and beyond to make sure we were comfortable amazing food and service if you have te opportunity to upgrade it's a must and well worth it.

I love to travel again and again in Emirates. Keep up the good work.

Very good from the beginning to the end. Amazing experience

I liked the newer aircraft CRJ-550 since it had WIFI and the seats are more spacious.

Fly Dubai takes low cost and thrift to new depths in terms of service levels, terminal 2 is grossly inadequate for capacity and resembles a crowded buss or railway station,, the fly dubai( Emirates) flight is never on time(was 2.5 hrs delayed), and this is not an isolated experience, the flght air conditioning was turned low while we waited on the tarmac for take clearance to save fuel, should say more!!!! The depths! I only fly this airline from a compulsion, emirates code shares for connections to Muscat

They changed the flight time without telling us and were unwilling to help with rebooking because we booked through orbits/kayak

Emirates did great! I liked the service, the food, cleanness, and the flight was on time. Much better airline than Qatar Airways I flew with last year.

I lost my lock from my luggage, I don’t know someone took something from my bag.

Except for the uncleaned tray, and the delay in serving food for our section (which may have been due to the location of our row) everything else was good. The crew were very professional and responded to our requests promptly throughout the flight. We as a family were not disappointed by Emirates.

It was great, a little more leg room would have been better particularly since we were in premium economy

Everything and everyone were excellent except for the charge for using WiFi; there was no escape from this fee except to not use it.

The crew and the food were excellent. The plane was kept quite clean.

More meal choice. There was only pork, beef and shrimp. I could not eat any of it and they had no alternatives

Crew were not engaging. Only engaged if requested. Food taste was mediocre

My seat had many issues. First the chair was broken where reclining was difficult. My usb plug was also broken so charging was impossible.

The flight from Hong Kong to Hyderabad didn’t have any power points to charge my mobile. Given we are no longer allowed to use power banks, giving customers the ability to charge even on short flights is critical part of the overall experience.

when i ask for help all the crew members had a look like why are you calling me? very terse and rude.

Good service and food. However, we paid over $400 for aisle seats for my disabled husband and me, and we were given window and middle seats. This was dangerous for our health condition on such a long flight. We needed to stand up and walk around frequently, but we were stuck in our seats. Please give us a refund of our seat payment since you chose not to honor our request.

Very bad Instead 22 hour it take me more that 35 hour to arrive from Los Angeles to Phuket and they changed my flight in Hong Kong to Shanghai china and in order to get my bag I was forced to vet china visa entrry

There could have been more options on the entertainment section Nothing was available for non English speaking passengers

Extremely uncomfortable seats with very little cushioning, unable to recline enough to sleep comfortably on this 13 hour overnight flight. My body was in pain by the end.

When we checked in at the Siem Reap Airport in Cambodia, we were only given three boarding passes and told that we would have to check in with American when we arrived in Boston. This was a source of stress for us. After we landed in Boston, we had a long passage from Terminal E to Terminal B (American Airline ticketing counter). Because the electronic ticketing kiosks for check-in would not recognize our Confirmation Code, we had to wait for an hour in a long line where only two AA reps were taking care of Special Services passengers. In many years of both business and recreational travel, I have never had this experience. I would expect more from AA being in partnership with other airlines to do a better job with this.

Our experience on the Doha to Hyderabad segment was extremely stressful due to prolonged delays and a lack of clear communication from the airline. We were traveling as a family, including children, and the uncertainty around timing and next steps caused significant distress. There was very little proactive information provided during the delay, and we were not given clear written explanations about what was happening or how long it might take. This made it difficult to manage the situation, especially while caring for children in a transit environment. In addition, one member of our party was ultimately unable to continue travel, which added to the emotional strain and disruption of the trip. Overall, the experience highlighted gaps in communication, customer care, and handling of unexpected situations. We are sharing this feedback so that future passengers, especially families, are supported with clearer communication and better assistance during irregular operations.

The seat cushions are absolutely lacking, not sure if they know the passengers are traveling for 14 hours straight, but the padding made our back and butt ache like crazy. The entertainment console had its own problems, either the headphone jack wasn't working or the power outlet via usb or ac outlet was not working. Not to mention the seat handles were not adjustable in some planes in the middle or on the aisle. Qatar/Indigo may be operating a very old fleet of planes to make as much profit as possible, but passengers may not be following them for long, should this treatment of its customers continue. Qatar/Indigo, wake up and do it right by your customers, or they may not be your customers anymore.

It would help id flight crew were not rude and showed some courtesy. They were shouting at passengers and yelling instructions as if we were school children at lunch cafeteria!!

All good. Over four hours flight if provided snacks like Qatar Airways would be better

Lobster starter in business class was not good, tough, served cold, and without butter. Movie selection was missing latest releases, did not offer older classic, high quality movies

Food was absolutely pathetic. I wasted so much food which I thought was inedible. I also loathe the inflight entertainment system which has very little content

My entire row did not have power for the full duration of a 14.5 hour flight. Could not charge any devices such as laptop or phones for the entirety of the long flight. The flight attendants tried to remedy the issue by resetting the power, but were not successful. The only other solution provided was to move me to another seat on the plane which was in the middle row. I had paid for a “preferred” seat that was a window seat. This was a downgrade being offered due to the power issue.

Nothing to complain. The staff and flight was good especially the seats which was better compared than the cloth ones on Qatar airways

The ground crew members at check in counter were courteous. The boarding was seamless. Flight departed as scheduled. Service on board was great

Very comfortable in business class. Excellent service. Good food. Smooth trip.

The seats seems abit small and the reclining is too much, the seat in front of me came back too much and made it uncomfortable for me.

As a first time flyer with Turkish Airlines. My experience was very good due to the factor that there were to many passengers on the my first flight compared to my connecting flight. However, I know that nothing is perfect and all companies are trying to accommodate their passengers to the best way possible. I will always say, a FEW INCHES will go LONG WAY. That's something all airliners should consider, and not only the money aspect!!! A long time commitment is better than one time service! Thank you

Flight was delayed. While standing at the gate, a note appeared on the sign saying the gate had changed to a gate far away. No member of the Turkish airlines team got on the microphone to instruct passengers to go to the other gate, to ignore the chiron, etc. Finally, the message disappeared. Eventually, the flight began to board. Very slowly. More slowly than I experience with other airlines. Though Istanbul may just be slow . . . In all other ways, great flight, great entertainment (top notch movies), great service, excellent food, comfortable lie-flat seat, dimmed lights, etc.

Staff at the airport wasn't helpful or friendly. Probably the worst airport experience I have ever had, going and coming. The staff on the plane was better. Still not super friendly or personable. However, they were not rude like airport staff. They ran out of certain menu items. Maybe could have been prepared better? Overall just ok.

It was a pleasant experience. In flight entertainment could have been better

The desk crew at the LAX crew could do better. A girl named Mahesi was very abrasive and unfriendly. She needs a better customer service uproar.

It was peaceful excited We enjoyed it always Turkish peaceful excited

Istanbul to Lahore flight was less than standard for international business class cabins. Seat did not were not flat and it did not operate easily. I had to push buttons hard repeatedly to operate the seat. I was in 5A seat

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

Information on your arrival and departure airports