Cheap flights from St Louis to Kathmandu

Compare St Louis to Kathmandu flight deals

Find the cheapest month or even day of the year to fly to Kathmandu

Book the best Kathmandu fare with no extra fees

Flight deals from St Louis to Kathmandu

Looking for a cheap last-minute deal or the best round-trip flight from St Louis Airport to Kathmandu Airport? If you want to travel next month, round-trip fares start from $1,644. Find the lowest prices on one-way and round-trip tickets right here.

Find the cheapest month to fly from St Louis to Kathmandu

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like St Louis to Kathmandu flights are currently cheapest in September.

St Louis to Kathmandu: Alternative routes

Compare routes from St Louis to Kathmandu below. You may find an airport to fly into that's cheaper, faster, or easier than Kathmandu.

St Louis to Kathmandu: Flight information

The things to know before you go.
Cheapest flight found$1,284
Cheapest month to flySeptember

Finding cheap flights from St Louis to Kathmandu: Frequently asked questions

The best price we found for a round-trip flight from St Louis to Kathmandu is $1,284. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
Currently, there are no airlines that fly direct from St Louis to Kathmandu. But we found flights with one or more stops from $1,284.
There are no flights flying from St Louis to Kathmandu, as of July 2026.
The cheapest month to fly from St Louis to Kathmandu is usually September.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from St Louis Airport to Kathmandu Airport on Wednesday, September 9, 2026.
No airlines currently offer direct flights between St Louis Airport and Kathmandu Airport. Most routes have one or more stops.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Kathmandu but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.

We crunched all the numbers in our flight calendar, and it looks like the cheapest time to book a flight to Kathmandu is around 40 days in advance, so don’t leave your flight to the last minute.

Currently, Qatar Airways offers the cheapest flight tickets to Kathmandu.

Flying from St Louis Airport (STL) to Kathmandu Airport (KTM): what you need to know

  • Kathmandu is 11 hours 48 minutes ahead of St Louis and follows the UTC+5:47 timezone.

  • Arriving two hours before an international flight and one hour ahead of a domestic departure are travel rules worth sticking to. Make sure you're at the airport on time to board your STL to KTM flight.

  • You can expect bigger queues in popular months such as July. Arriving up to four hours ahead of an international flight and two hours for a domestic departure will give you ample time for security and boarding.

How to find the cheapest flights from St Louis Airport (STL) to Kathmandu Airport (KTM)

  • $783 is currently the best price for a one-way St Louis Airport to Kathmandu Airport flight. Return flights start from $1,284. These prices can change depending on demand and availability.

  • It's usually best to book as early as possible if you're hoping to get cheap tickets from STL to KTM. That's because flight prices are based on demand, which tends to increase closer to the date of departure.

  • The 'Whole month' search tool shows you the cheapest flights from St Louis Airport to Kathmandu Airport throughout the month. It's a good way to snap up a bargain if your travel plans are flexible.

  • Finding cheap flights from STL to KTM is a cinch with Price Alerts. All you need to do is set up one of these automatic alerts and we'll let you know when a new deal comes up.

  • Discover the ideal flight for you by using the filters. To see the 'Fastest,' 'Best' or 'Cheapest' flights from St Louis Airport to Kathmandu Airport, use the 'Sort by' function. You can also filter by airline, departure and arrival times, and number of stops.

Handy information about St Louis Airport (STL)

Arriving at Kathmandu Airport (KTM)

When to fly to Kathmandu Airport (KTM)

  • November is the most popular month for flights from St Louis Airport to Kathmandu Airport. To skip the crowds, go to Kathmandu in March.

  • The warmest month in Kathmandu is June, with the temperature ranging between 17ºC (63ºF) and 30ºC (86ºF). Book your flights from St Louis Airport to Kathmandu Airport in this month if this is the kind of weather you like.

  • If you'd rather travel in cooler conditions, search for a cheap ticket from STL to KTM in January. Average temperatures are between 3ºC (37ºF) and 19ºC (66ºF) then.

Explore more of Nepal

  • Pokhara is just one of the many places in Nepal waiting to be discovered once you've seen the sights of Kathmandu. Around 145 kilometers away to the north-west, top sights here include Phewa Lake, Parahawking and Sarangkot View Point.

  • If you're eager to discover another corner of Nepal, head for Patan, roughly 6 kilometers south of Kathmandu. Patan Durbar Square, Hiranya Varna Mahavihar and Kathmandu are the start of reasons to visit.

Prices shown on this page are estimated lowest prices only. Found in the last 12 days.