SEA - KTM

$460 Find Cheap Flights from Seattle to Kathmandu - Compare and Save

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 9/6. 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
$1,060
Typical prices: $1,802-$1,019
Qatar Airways
Thu 9/10Thu 9/24
SEA - KTM • 1 stop
Cheapest one-way
$460
Typical prices: $783-$1,038
Singapore Airlines
Sun 9/6
SEA - KTM • 1 stop
Nonstop flights
Not available
There are currently no direct flights between Seattle and Kathmandu. You'll need at least 1 connection.
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Top layover airports
Cheapest • Avg $1,765 (round-trip)
Shortest trip • 21h 02m (one-way)
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When to book
in advance
Our data shows that travelers who book at least 7 weeks in advance save around 27% compared to booking last minute.
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When to travel
Cheapest • 21% price drop
Most popular
Good to know
Good to know
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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

Thu, Sep 10 - Thu, Sep 24
Qatar Airways Logo
4:25 pm - 9:50 am
SEA
-
KTM
28h 40m
1 stop
Qatar Airways Logo
6:00 pm - 12:25 pm
KTM
-
SEA
31h 10m
1 stop
$1,060Qatar Airways
Wed, Aug 5 - Thu, Sep 10
Qatar Airways Logo
4:25 pm - 9:50 am
SEA
-
KTM
28h 40m
1 stop
Qatar Airways Logo
6:00 pm - 12:25 pm
KTM
-
SEA
31h 10m
1 stop
$1,061Qatar Airways
Tue, Sep 22 - Wed, Dec 2
Qatar Airways Logo
4:25 pm - 9:50 am
SEA
-
KTM
28h 40m
1 stop
Qatar Airways Logo
9:35 am - 11:40 am
KTM
-
SEA
39h 50m
1 stop
$1,062Qatar Airways
Thu, Oct 29 - Thu, Nov 5
Qatar Airways Logo
5:05 pm - 5:30 pm
SEA
-
KTM
35h 40m
1 stop
Qatar Airways Logo
9:35 am - 11:40 am
KTM
-
SEA
39h 50m
1 stop
$1,065Qatar Airways
Sun, Sep 6 - Wed, Sep 23
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
$1,068Qatar Airways
Sun, Sep 27 - Tue, Oct 13
Qatar Airways Logo
4:25 pm - 5:20 pm
SEA
-
KTM
36h 10m
1 stop
Qatar Airways Logo
6:00 pm - 12:25 pm
KTM
-
SEA
31h 10m
1 stop
$1,077Qatar Airways
Thu, Sep 10 - Thu, Sep 24
Qatar Airways Logo
10:47 am - 8:50 am
SEA
-
KTM
33h 18m
2 stops
Qatar Airways Logo
6:00 pm - 12:25 pm
KTM
-
SEA
31h 10m
1 stop
$1,082Qatar Airways
Sun, Sep 6 - Mon, Sep 21
Multiple Airlines Logo
4:25 pm - 9:50 am
SEA
-
KTM
28h 40m
1 stop
Multiple Airlines Logo
6:45 pm - 5:39 pm
KTM
-
SEA
35h 39m
2 stops
$1,089Multiple Airlines
Wed, Aug 5 - Fri, Sep 11
Multiple Airlines Logo
4:25 pm - 9:50 am
SEA
-
KTM
28h 40m
1 stop
Multiple Airlines Logo
11:05 am - 7:07 pm
KTM
-
SEA
44h 47m
2 stops
$1,091Multiple Airlines
Tue, Sep 22 - Wed, Dec 2
Qatar Airways Logo
8:41 am - 9:50 am
SEA
-
KTM
36h 24m
2 stops
Qatar Airways Logo
9:35 am - 11:40 am
KTM
-
SEA
39h 50m
1 stop
$1,092Qatar 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 September.

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 July and December, where the average cost of round-trip tickets is $1,516 and $1,487 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 7 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 seasonAugust
Cheapest flight$460
Best time to beat the crowds but there is an average 1% increase in price.
Most popular time to fly with an average 7% 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 5 days, the lowest price for a flight from Seattle to Kathmandu was $460 for a one-way ticket and $1,060 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 $1,164 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 1545 reviews
7.8Food
8.0Comfort
8.1Entertainment
8.3Boarding
8.6Crew
Airline reviews

The friendliness of the attendants, and the quality of the service.

10.0 ExcellentAnonymous, Jun 2026
LAX - NRT
Read more Singapore Airlines reviews

The friendliness of the attendants, and the quality of the service.

Flight attendants were awesome! Very helpful and patients. Some food were good but maybe not serving fish that kinda make the whole aircraft smell fishy. The “fried pork” was tasty but too much skin so it doesnt taste that great.

Very concerned with guest comforts going out of their way to accommodate special dietary needs when the guests hadn’t pre-ordered.

Clean modern comfortable. Food could have been better, I only ate breakfast I wish they wouldn’t wake sleeping passengers who would rather sleep through dinner. No tea or coffee for breakfast

Food was terrible , uncomfortable seats, WiFi did not work, will never fly Singapore again.

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

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.

Difficult to find some food option for gluten and dairy allergy. May be a fruit salad would be better

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.

The plane was dirty, the seats were torn and broken, the service was the most terrible ever, the bathroom dirty, they will not even serve water you had to request it, the meals were terrible, overall less than Zero, I will never fly Cathay Pacific again.

Despite the crew's rough day, they were all very focused and friendly. The flight was too short for a meal, so no rating on that. Re. the AA app. It still isn't ready for prime time. AA works with Cathy Pacific for international flights to LA and the Aa jump to PHX. But the AA app can't find my trip and this can be problematic with flight delays and regatings at LAX.

Was not able to board flight because boarding pass name did not match passport name and no one caught it.

Had a bad experience with crew member coming back Hong Kong to la the person next to me one of the passenger have taken video and picture of crew member the person that served meal young kid late 20' s 6 5'10 had attitude at his peak anything I asked for I don't know if it was bad day or racial I felt humiliated as people could see difference towards me I no problem with Cathy and my whole family never had one was very disappointed

Good good, good seat, good entertainment system. Customer service is good but can be more polished if CX charges a premium price.

Frequently flyer number should and could have been put on at the time of booking as I gave the number when booking.

Very attentive crews Flight was very smooth and safe Only little disappointment was the slight delay of departure (~30 minutes ) which rarely happen with CX flights

Not at all satisfactory. I had stomach upsets after taking food. Quality of Asian vegetarian meal was awful. Further there was no snacks/ fruits/ biscuits available as in between snacks.. only peanuts and pitzels.. except courteous staff rest of my experience was far from satisfactory

Staff was very courteous. Plane was clean and quite spacious even in the last rows. Veg food could have been better.

Later on, when there was no more bottled water, the water we received had a strong chlorine/disinfectant odor. On my flight from Hong Kong to Los Angeles, there was a male flight attendant who had a mean attitude throughout the whole trip, and he was very impatient during meal service “Furthermore, we purchased a Hong Kong SIM card as part of our flight package, but we received no instructions—neither by email nor SMS—on how to activate or use it. Consequently, we were unable to use the service at all. We request a full refund, as this appears to be a deceptive charge

Entertainment system is okay, flight attendants were ok. Leg space very narrow, I couldn’t get what I wanted to eat, dinner nor breakfast.

Excellent experience with business class area. Staff was attentive and food was amazing. Only one bathroom for business class which was logistically difficult for the staff while preparing meals. Need to offer fluids with meals. I did not get enough water to drink. But overall I rate it 5 star.

On time, great food, good drink selection! Only down was alcohol-free lounge. Lufthansa had a much better offering!

Be honest of what you sell: This was sold as Business Class on all three legs, while the JetBlue plane didn't even have business class seats, and wanted $164 for extra legroom seats.

Seat assignments for family traveling with 2 children. Loud crowd during sleep time

It was crowded… the bathrooms dirty and smelly. The seats have been made even smaller.

delayed to take off from detroit by 3 hours lost baggage in istanbul and now in venice without baggage

Seats were very tight with poor legroom - and I am average height. During the 12 hour flight, tiny paper cups of drinks we're only offered during the super and breakfast services, with the crew nowhere to be seen in between. One of the bathrooms was out of order, leading to long lines waiting to use the remaining two available to the economy class passengers.

short flight but we still got a very nice lunch and the crew did an excellent job in taking care of us

For that price on Business class, I expected to have the pod seats. These were configured as 2/3/2 and my seat mate talked half the flight with a friend across the isle, loudly. Very uncouth.

Really good food and service. Qatar Airways is again and again provided an exceptional experience.

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.

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

Information on your arrival and departure airports