SEA - KTM

$454 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 8/30. 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

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.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Seattle to Kathmandu.
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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, Aug 30 - Sun, Sep 14
 Logo
7:10 pm - 6:10 pmSEA-KTM
34h 15m2 stops
 Logo
1:25 pm - 10:35 amKTM-SEA
57h 55m2 stops
$1,028
Find Deal
Sat, Sep 13 - Sun, Sep 28
 Logo
7:10 pm - 3:40 pmSEA-KTM
31h 45m2 stops
 Logo
4:40 pm - 10:35 amKTM-SEA
54h 40m2 stops
$1,068
Find Deal
Thu, Sep 18 - Tue, Oct 7
 Logo
12:30 pm - 1:00 pmSEA-KTM
35h 45m2 stops
 Logo
4:40 pm - 5:15 pmKTM-SEA
37h 20m2 stops
$1,071
Find Deal
Sat, Sep 6 - Tue, Sep 9
Turkish Airlines Logo
12:30 pm - 6:15 amSEA-KTM
29h 00m1 stop
Turkish Airlines Logo
7:40 am - 5:15 pmKTM-SEA
22h 20m1 stop
$1,102Turkish Airlines
Find Deal
Wed, Sep 3 - Fri, Oct 3
Turkish Airlines Logo
7:10 pm - 6:15 amSEA-KTM
22h 20m1 stop
Turkish Airlines Logo
7:40 am - 10:35 amKTM-SEA
39h 40m1 stop
$1,122Turkish Airlines
Find Deal
Fri, Dec 26 - Thu, Jan 22
Singapore Airlines Logo
8:45 am - 9:50 pmSEA-KTM
23h 20m1 stop
Singapore Airlines Logo
11:00 pm - 7:10 amKTM-SEA
21h 55m1 stop
$1,137Singapore Airlines
Find Deal
Fri, Dec 26 - Sun, Jan 25
Singapore Airlines Logo
8:45 am - 9:50 pmSEA-KTM
23h 20m1 stop
Singapore Airlines Logo
11:00 pm - 7:10 amKTM-SEA
45h 55m1 stop
$1,159Singapore Airlines
Find Deal
Sat, Sep 6 - Tue, Sep 9
Turkish Airlines Logo
12:30 pm - 6:15 amSEA-KTM
29h 00m1 stop
Turkish Airlines Logo
7:40 am - 10:20 pmKTM-SEA
51h 25m2 stops
$1,167Turkish Airlines
Find Deal
Mon, Jan 5 - Mon, Jan 19
Emirates Logo
4:05 pm - 10:40 pmSEA-KTM
40h 50m1 stop
Emirates Logo
7:15 pm - 12:35 pmKTM-SEA
31h 05m1 stop
$1,251Emirates
Find Deal
Wed, Nov 19 - Mon, Dec 8
Emirates Logo
4:05 pm - 10:40 pmSEA-KTM
40h 50m1 stop
Emirates Logo
9:20 am - 12:35 pmKTM-SEA
41h 00m1 stop
$1,297Emirates
Find Deal
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’s the cheapest day of the week to fly from Seattle to Kathmandu?

The average price of all round-trip flights from Seattle to Kathmandu clicked on KAYAK for each day over the last 12 months.

For Seattle to Kathmandu, Wednesday is the cheapest day to fly on average and Sunday is the most expensive. Flying from Kathmandu back to Seattle, the best deals are generally found on Saturday, with Sunday being the most expensive.

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 April, where tickets cost $1,180 (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 $1,552 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 8 weeks before departure, which saves you about 20% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 26 weeks before departure.

Good to know

Low seasonJanuary
Cheapest flight$454
Best time to beat the crowds with an average 13% drop in price.
Most popular time to fly with an average 10% 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 $454 for a one-way ticket and $1,028 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?

    Star Alliance, and oneworld are the airline alliances operating flights between Seattle and Kathmandu, with Star Alliance 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 $1,198 and an overall rating of 8.1, Singapore Airlines is the most popular choice. Emirates is also a great choice for the route, with an average price of $1,759 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 4 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.
8.1
Singapore AirlinesOverall score based on 1338 reviews
8.6Crew
8.2Boarding
8.0Entertainment
7.9Comfort
7.7Food
Airline reviews

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

10.0 ExcellentAnonymous, Jul 2025SFO - SIN
Read more Singapore Airlines reviews

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

Food from Surabaya was below average but from Singapore is much better

The usual excellent experience with Singapore Airlines. The airplane was on time and actually early to Haneda Airport. The onboarding experience was pleasant with no delays, perhaps owing to the fact that the flight was not full. Nevertheless, the air crew were their usual outstanding standards in serving the passengers.

We were not given option for meals since they ran out of the other option but good thing the remaining options tasted great.

Very good flight from Boarding to landing -efficient and comfortable with decent entertainment options

Construction at PDX resulting in very lung walk from the rental car to the gate. SFO, extremely long walk between terminals to get to connecting Singapore airlines flight. My smart watch recorded a total of 3 miles.

Crew and service was excellent, but passengers should be offered a welcome drink before take off which did not happen. Food was very good. Unfortunately the lie-flat bed in business class was one of the most uncomfortable I have experienced. The configuration forces you to sleep with your legs at an angle instead of in a straight line, plus there is very little padding on the bed so it wasn't possible to sleep for more than 2-3 hours on an 18 hour flight. For what the airlines charges for a business class ticket their hard product leaves a lot to be desired.

Everything was great keep up the good work 😁, can't ask for more.

Flight from SFO did not include entertainment as it was not working the entire duration of the flight. Was informed that there would be a $350 voucher for the inconvenience. Uncertain how the voucher will be provided.

The food options and quality could use some more excitement and variety.

Great. Efficient boarding process with the face recognition. Plenty of cabin space for luggage.

Entertainment for kids was good. Good was terrible, needs lots of work.

As before, my only problem was not being able to download my boarding passes prior to arrival at the airport. Everything else was perfect.

The only problem I had was not being able to download my boarding passes prior to arriving at the airport. Everything else was perfect.

I had high expectations but met with a below average experience. I hope the Airline will take a notice and improve.

Special request meals are really below average. Vegetarian options are very limited if you didn't prebook.

I've stomach problems after 2 hours of flight, Iris, the flight purser not only did her best to make me feel comfortable, she went above and beyond providing pain relievers medicines and ointment. She look and found a doctor passenger on the flight to provide advise. She even report on ground staffs about my condition and provide wheelchair upon arrival. Kudos to her and Cathay Pacific!

So so, crew was overly professional and lacks human touch. Equipment is very old, especially the HKG-PVG CX366 flight. That plane along with its decor must have twenty years of history, or at least I had that impression.

I have a Peanut Allergy and the Steward staff were very accommodating in ensuring my safety as my allergy is life threatening. Very professional and so vested in their profession.

Very noisy and careless crew on this overnight flight. They should understand customers want to sleep

Reason for travelling Tampa to Orlando is to fly Qatar Airline. we end up with American Airline. This was the miserable experience I ever had in my entire travel history. Flight attendants were rude. They hit my knee with the food cart and I was holding ice pack for 2 hours. I still have the pain after a week. WE boarded the flight twice because of the temperature inside the plan.

First keep the airline as you promise. Reason for travelling from Orlando to Tampa is to go with Qatar Airline. We end up with American Airline. As expected the service was horrible.

Not sure how we end up with American Airlines instead of Qatar Airways. From Philadelphia to Qatar they boarded us then they asked us to unload. After 30 minutes later they board us again. The inside the plane it was burning hot and we were sweating like crazy. Crew members are absolute rude. The way they served the passengers were horrible. One of the crew members hit my knee with food cart and kept going. I was holding an ice pack for almost 2 hours. I am still with the pain.

I felt that when I was rerouted it should have been to business class.

The flight was smooth Thank God but the delays and changing gates for 3-4 times made me so tired of walking back and forth with heavy bags I thought I was going to pass out with heavy headaches but Thank God finally found the final gate and home safe. These delays happen anytime for important reasons so just be patient when you come across these situations.

This trip was the most comfortable one I have ever experienced, the team was excellent and very helpful. I am so glad I picked Qatar Airways.

All the crew members were too slow and rude. Most of the times the registers were empty, while hundreds of customers were waiting in line, and it was impossible to get a supervisor. Despite being in line on time, I missed my freight, plus a some customers who were ahead and behind me.

Well organized boarding, efficient and on time. Nice crew on the plane. Thank you!

The Qatar Airways staff pre-boarding and also on the flight from Dallas to Doha were incredibly mediocre and arrogant. Consider retraining these individuals Other flights were ok.

My experience with Qatar airway was very unsatisfactory. They lost my child’s stroller and I was told they found it and will send it to the hotel which was a lie. I had to go back to the airport baggage claim and pick up myself after trying to contact them many times!. There was a lack professional and communication. I am very disappointed in Qatar airway and will not be recommending them to friends and family nor will I be flying with them in the future.

The economy seat was so uncomfortable, had not enough leg room for 13 hours flight, front seat basket was broken and couldn’t hold anything, food quality was horrible( we got food poisoned ) we charged for logged which used to be free. We paid too much for this flight and very disappointed. Turkish air line better to make satisfy and respect people instead of find different way to scam people.

This is really the rating of two flights. JFK to IST then IST to NQZ. New York to Istanbul was good. Good crew and all positives. The flight to Astana was so bad that brought it all down. Crew was nonexistent above the minimum, seats were cramped, and it was hot on the plane. Turkish Airlines seems to be slipping down to US based carriers level.

The 2 agents on the check in counter were super nice , helpful and very polite. Boarding was like a 1 2 3, I would recommend Turkish airlines for your next trip.

Everything was very good, except that the plane was an hour and a half late

flight with heavy turbulence old boeing 777 rest wasnt clean dashboard doesn’t work

Light and recline did not work on my seat. Very uncomfortable and could not read in the dark

Bad experience; they are not good anymore. They charge too much for luggage seat are so uncomfortable, Flight delays which may miss your next flight, they don’t care if you miss the flight or not. Zero customer services for front desk representatives Istanbul's airport I’m not using this airline any more.

I’ve been traveling for 20 years. I tried Turkish airline for the first time horrible horrible service and it would be my last time even if I get offer for a free ticket, I will not accept it. They have races and the worst Flight attendant

It wasn't good. I didn’t understand. They changed 320 dollars for 2 luggage. My ticket was regular and I paid almost 1200.00 dollars. Why they did charge? I want my money back.. thanks Yılmaz polat

Very punctual, the onboard staff was friendly and correct, the flight was fortunately very calm, the toilets were clean, in short, an excellent experience Thanks

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

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