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 return flight from St Louis Airport to Kathmandu Airport? If you want to travel next month, return fares start from $2,189. Find the lowest prices on one-way and return 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 November.

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$1,112
Cheapest month to flyNovember

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

The best price we found for a return flight from St Louis to Kathmandu is $2,048. 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 $2,048.
As of April 2026, there are no flights flying from St Louis to Kathmandu.
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 Thursday, 17 September 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 Lambert-St. Louis International Airport (STL) to Tribhuvan International Airport (KTM): what you need to know

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

  • To ensure you get on your STL to KTM flight, leave enough time to check in and find your gate. Arriving two hours before international departures and one hour before domestic flights is the standard rule.

  • Travelling during a peak time such as July? Major public holidays and other popular seasons can result in longer queues at airport checkpoints. Be extra cautious and arrive up to four hours ahead of an international flight and two hours before a domestic departure.

How to find the cheapest flights from Lambert-St. Louis International Airport (STL) to Tribhuvan International Airport (KTM)

  • Right now, $1,112 is the cheapest price we've seen for a one-way Lambert-St. Louis International Airport to Tribhuvan International Airport flight. The best price for a return ticket is $2,049. Remember that fares can change due to demand when booking.

  • To get your hands on cheap tickets from STL to KTM, book in advance. Airlines typically offer their best fares when flights are first made available.

  • If you're flexible with your travel plans, use the 'Whole month' tool. It'll show you the lowest price across each month when looking for your flight from Lambert-St. Louis International Airport to Tribhuvan International Airport.

  • Spend less time searching for cheap flights from STL to KTM by setting up a Price Alert. You'll receive an email or notification through the app when a new discounted fare appears.

  • Tailor your trip with filters. Pick your preferred departure and arrival times, total journey duration and airlines. You can also sort results by 'Cheapest,' 'Fastest' or 'Best' flights from Lambert-St. Louis International Airport to Tribhuvan International Airport.

Handy information about Lambert-St. Louis International Airport (STL)

Arriving at Tribhuvan International Airport (KTM)

  • The last thing you want is a lengthy journey to your hotel if you're getting in late on a Lambert-St. Louis International Airport to Tribhuvan International Airport flight. Stay at one of these accommodation options near KTM instead:

  • Venture beyond Kathmandu and check out places that aren't found in every travel guide with your own set of wheels. You can grab a Tribhuvan International Airport rental car from Spark Car.

  • For the lowest price, book your ride from Tribhuvan International Airport about one week before your trip.

Getting from Tribhuvan International Airport (KTM) to central Kathmandu

  • Tribhuvan International Airport is approximately 5 kilometres from the centre of Kathmandu. The drive time takes around 15 minutes.

When to fly to Tribhuvan International Airport (KTM)

  • The quietest month for a flight from Lambert-St. Louis International Airport to Tribhuvan International Airport is February, while September is the busiest. Pick the ideal time to go to Kathmandu based on whether you prefer a more relaxed vibe or a faster pace.

  • When booking your flight from Lambert-St. Louis International Airport to Tribhuvan International Airport, consider the kind of weather you enjoy. June is the warmest month in Kathmandu, with the temperature ranging from 17ºC (63ºF) to 28ºC (82ºF).

  • Search for cheap tickets from STL to KTM in January if you like travelling in cooler conditions. Temperatures are at their lowest around then, ranging between 3ºC (37ºF) and 18ºC (64ºF) on average.

Explore more of Nepal

  • Pokhara is just one of the many cities in Nepal waiting to be discovered after you've experienced Kathmandu. Around 145 kilometres away to the north-west, popular attractions include Phewa Lake, Sarangkot and Gupteshwor Mahadev Cave.

  • Around 6 kilometres south of Kathmandu, Patan is another favourite stop in Nepal. Experience major highlights starting with Aspur Agro Farm, Pimbahaa Pukhoo and Rajib Handicraft.

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.