SEA - KTM

$333 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 4/26. 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
$663
Overall average: $1,389
Singapore Airlines
Sat 9/12Sat 10/17
SEA - KTM • 1 stop
Cheapest one-way
$333
Typical prices: $366-$811
Singapore Airlines
Sun 4/26
SEA - KTM • 1 stop
Top airlines
Cheapest • from $663 (round-trip)
Best reviews • 8.2 score
Airline reviews
Airline reviews
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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 $1,605 (round-trip)
Shortest trip • 21h 12m (one-way)
Insights
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When to book
in advance
Our data shows that travelers who book at least 10 weeks in advance save around 33% compared to booking last minute.
Insights
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Insights
When to travel
Cheapest • 22% price drop
Most popular
Good to know
Good to know
+1
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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

Sat, Sep 12 - Sat, Oct 17
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
$663Singapore Airlines
Tue, Sep 1 - Wed, Sep 30
Cathay Pacific Logo
12:25 pm - 9:45 pm
SEA
-
KTM
20h 35m
1 stop
Cathay Pacific Logo
11:00 pm - 10:05 am
KTM
-
SEA
23h 50m
1 stop
$869Cathay Pacific
Tue, Sep 1 - Wed, Sep 30
Multiple Airlines Logo
10:15 am - 9:30 pm
SEA
-
KTM
22h 30m
1 stop
Multiple Airlines Logo
11:10 pm - 4:56 pm
KTM
-
SEA
30h 31m
2 stops
$891Multiple Airlines
Fri, Sep 4 - Fri, Sep 18
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
$908Singapore Airlines
Tue, Apr 7 - Wed, May 6
Multiple Airlines Logo
7:10 pm - 7:50 pm
SEA
-
KTM
35h 55m
2 stops
Multiple Airlines Logo
4:40 pm - 5:15 pm
KTM
-
SEA
37h 20m
2 stops
$913Multiple Airlines
Wed, Apr 8 - Tue, May 5
Multiple Airlines Logo
7:10 pm - 7:50 pm
SEA
-
KTM
35h 55m
2 stops
Multiple Airlines Logo
4:40 pm - 5:15 pm
KTM
-
SEA
37h 20m
2 stops
$942Multiple Airlines
Tue, Sep 1 - Wed, Sep 30
Multiple Airlines Logo
10:15 am - 9:30 pm
SEA
-
KTM
22h 30m
1 stop
Multiple Airlines Logo
11:10 pm - 5:57 pm
KTM
-
SEA
31h 32m
3 stops
$953Multiple Airlines
Fri, Sep 4 - Fri, Sep 18
Multiple Airlines Logo
10:15 am - 9:30 pm
SEA
-
KTM
22h 30m
1 stop
Multiple Airlines Logo
11:10 pm - 4:56 pm
KTM
-
SEA
30h 31m
2 stops
$962Multiple Airlines
Wed, Apr 8 - Sun, May 3
Multiple Airlines Logo
7:10 pm - 7:50 pm
SEA
-
KTM
35h 55m
2 stops
Multiple Airlines Logo
8:50 pm - 5:15 pm
KTM
-
SEA
33h 10m
2 stops
$981Multiple Airlines
Tue, Jul 28 - Thu, Aug 6
Multiple Airlines Logo
2:10 pm - 9:50 am
SEA
-
KTM
30h 55m
2 stops
Multiple Airlines Logo
8:50 pm - 4:59 pm
KTM
-
SEA
32h 54m
2 stops
$1,004Multiple Airlines
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.

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 June, where the average cost of round-trip tickets is $1,559 and $1,519 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 10 weeks before departure, which saves you about 33% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 26 weeks before departure.

Good to know

Low seasonJune
Cheapest flight$333
Best time to beat the crowds but there is an average 16% increase in price.
Most popular time to fly and prices are also 6% lower on average.
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 $333 for a one-way ticket and $663 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?

    Singapore 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 $1,187 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 1479 reviews
8.6Crew
8.3Boarding
7.8Food
8.0Comfort
8.0Entertainment
Airline reviews

Overall the airline tried to give excellent service. The wheelchair service was bad at SFO. My baggage was also delayed but I thank them for taking the trouble to find it and deliver it to my home.

10.0 ExcellentAnonymous, Mar 2026
BLR - SIN
Read more Singapore Airlines reviews

Overall the airline tried to give excellent service. The wheelchair service was bad at SFO. My baggage was also delayed but I thank them for taking the trouble to find it and deliver it to my home.

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

I felt that the whole experience went very smoothly. The aircraft was extremely clean and tidy on boarding. The cabin crew were beautifully turned out very, very efficient and were a credit to Singapore Airlines who are now my favourite carrier.

Food was served to different people at different times and it wasn't clear why. The crew apologized for the wait. But it felt odd and inconsistent. They could use charging ports on each of the seats. Mine didn't have any. Also, they could've offered more snacks. It was a 12+ hour flight and no snacks were ever offered. Everything else was OK.

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

Crew and service excellent. 2 hour delay for takeoff. SQ app showed flight on time.

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

The boarding process was smooth and the stewardesses were nice. Some delays with drinks at the end of the flight, but no issues.

Thay crew was so nice.Air hostess il ham was so nice.my mom was little scray with airplan turbulence she help us alot.

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

I didn't have much experience with Cathay Pacific airlines because of delay and missed connections, the bulk of the trip was on Japan Airlines.

Flight delayed first from bad weather, then after boarding there was a problem with the plane. We had to get off and onto another plane...connections were missed and the trip took an additional 10 hours!! Pre-paid seatting was not honored due ro last minute carrier changes. Most of the trip was on Japan Airline.

Few vegetarian food options. Incorporating one per meal service would be best and captures a wider audience than just vegetarians (individuals with religious meat restrictions can also eat vegetarian).

Extensive delays, poor organization to board people, as it felt like chaos to get inside of the plane. No lines, everyone gathering together like a mayhem, very confusing. Passengers out of hand and rude, which is not the airlines fault. However, there should be rules, e.g., not letting one passenger take 2+ spots in the overhead bin.

Crew and food were great in-flight. We had a 2 hour delay, no communication, and just got left in a limbo. The crew arrived late and they were running checkouts on the plane (which is important, but why not doing it earlier?) Cathay did nothing to about the delay, and a lot of people missed their connection flights. I had to run and got stuck at checkpoint, which made my entire trip very unpleasant. Got to my gate 5 mins prior to them closing it.

Trip was fine. My only complaint was that when the passenger in front of me reclined her seat (which was, in essence, the whole flight except landing and take-off,) it was uncomfortably claustrophobic for me and very difficult for my husband to get in and out of his window seat. Also uncomfortable to watch the entertainment because the screen was right in your face.

My flight was suppose to be at 7:45pm to fly but it didnt fly out until 8:55 to dallas so then all of my other flights was late and delay ihad to wait at the airport for extra 14 hours to be able to get on a different plane

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

IAH to Istanbul was outstanding across the board. The flight from Istanbul to Male was good, not great.

the cabin was kept too hot. couldn't sleep as a result

It was an amazing experience. Flight crew's service, hospitality, and the food were phenomenal. I don't think I'd want to try any other airline company after this. I would definitely recommend to friends and family. Thank you Turkish Airlines !

Business Class pods are horrible. If you're petite, you might be able to sleep on the uncomfortable seat and bed. Crew and food are fantastic.

I have travelled many times on Turkish, but they always board at least 30-40 minutes past the stated time. If informed properly, passengers can choose to spend more time in the .lounge instead of standing around by the gate waiting to board. The new lounge at DFW was a big disappointment. The aircraft itself was a shock. In the past I have flown this sector with regular business class seating configuration of 1-2-1, The 2-3-2 seating is very disappointing after paying such high prices for tickets. The DFW to Istanbul segment was slightly better, but the Istanbul to Delhi segment was no better than premium economy. I will try to travel more on airlines which give business class passengers more value for their money.

Good overall. Seat spacing a bit tight between IST and ISB.

Excellent staff despite some trying passenger situations. Very impressed with their good attitudes and kindness.

Crew were unfriendly, touch screen for movies didn't work very well, seats were tight and uncomfortable

After arriving in Istanbul, the transit information on the electronic board showed a tight departure time, and the gate changed in the middle, making it difficult to make it on time.

Typically good service onboard but baggage delay in airport was significant

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

Information on your arrival and departure airports