Round-trip journeys between Sea-Tac Airport and Tribhuvan Intl. Airport start from S$1,543. This price is based on fares listed within the last 7 days on Expedia for flights departing within the next year — make your booking ASAP so you don’t miss out. Prices and availability are subject to change. Additional terms apply.

Most flights can be cancelled online, but whether or not you incur a fee all comes down to your airline. If you do have to cancel your trip, follow the instructions in the Customer Service Portal.

Many airlines offer the option to reschedule your flight without a change fee. All you pay is the difference between the original flight and the new flight. When you’re searching for SEA to Tribhuvan Intl. Airport flights, you’ll see a “no change fees” filter for you to select.

You’ll have 11,200 kilometres to cover on the long-haul SeaTac to Kathmandu route. Dress in layers of comfortable clothes and consider taking a neck pillow with you.

Flying nonstop between Sea-Tac Airport and KTM isn’t possible at present. However, you’ll still be able to find a flight to Kathmandu with at least one stop.

Booking your trip from SEA to Tribhuvan Intl. Airport last minute could save you some cash. However, it could end up costing a great deal more! If you’d rather not take any chances, book well ahead of your departure date. In fact, Expedia has some of the biggest bargains up to 12 months in advance. If your preferred air carrier hasn’t released tickets yet, check back frequently as deals are updated on Expedia all the time.