Cheap flights from Kathmandu to Southeast Asia from $142

The month of March is, on average, the cheapest month to fly to Southeast Asia from Kathmandu, with most prices found around $541. If you don’t want to visit Southeast Asia in March, then you should wait until August to fly from Kathmandu, when ticket prices are also cheap, with an average price of $545.

The cheapest day to depart from Kathmandu to Southeast Asia is on a Wednesday when prices can be found for as low as $398. If your travel schedule is flexible, try to avoid departing on a Monday because tickets tend to average around $525. These prices are subject to change though, so be sure to set up a Price Alert for flights to Southeast Asia.

In the afternoon is the cheapest time of day to fly from Kathmandu to Southeast Asia when you can find flight prices for as low as $245. Flying to Southeast Asia in the afternoon is an ideal time because this is during off-peak travel hours. Try not to purchase tickets in the evening because they tend to be around $558. Of course, these prices can vary depending on the time of year and what airport you fly to.

Fly from Kathmandu Tribhuvan to Bangkok Don Mueang Intl for the best Kathmandu Tribhuvan - Southeast Asia flight prices

You are more likely to see cheaper flights to Southeast Asia from Kathmandu when booking weeks ahead of your departure date. In general, you can expect to find flights to Southeast Asia for around $309 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Southeast Asia from Kathmandu for as low as $232 on momondo.

There are 4 cabin classes available to choose from on Kathmandu to Southeast Asia flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Thai Lion Air, China Eastern, and Air India are the most popular carriers operating from Kathmandu Tribhuvan to Southeast Asia

Thai AirAsia, Thai Airways and Thai Lion Air are the top three most popular airlines that fly to Southeast Asia from Kathmandu according to our data. Thai AirAsia is the first choice among our users, with 36% of people opting to fly with this airline when traveling to Southeast Asia. Keep in mind that there are 7 different airlines that fly to Southeast Asia on a routine basis, so you have a few additional options to choose from.

As of July 2026, there are 6 flights per day flying from Kathmandu to Southeast Asia. The most common time of day flights depart is 10:00PM, with 46% of flights taking off in the evening.

As of July 2026, there are 45 flights per week flying from Kathmandu to Southeast Asia. The most common day of the week flights depart is Tue, with 20% of flights taking off on this day.