Flights Bangkok to Kathmandu (BKK-KTM): Airlines, THB Fares | May 2026

Flights Bangkok → Kathmandu (BKK-KTM) — THB Fares, Airlines, Frequency

Bangkok to Kathmandu is the busiest air link between Thailand and Nepal — around 21 flights a week, well above what either pilgrimage or trekking alone would sustain. The route carries Thai Buddhists travelling to Nepal’s holy sites, trekkers bound for the Himalaya, Nepali workers and students with ties to Thailand, and a steady flow of business and family travel between the two countries.

Block time is about 3.5 hours, short enough for a comfortable daytime flight. The mix of full-service and low-cost carriers keeps the route competitive, and Kathmandu also functions as the staging point for onward travel deeper into Nepal.

Airlines on this route

Four carriers serve BKK-KTM: Thai Airways and Nepal Airlines on the full-service side, with IndiGo and Thai AirAsia covering the low-cost end. The full-service carriers include checked baggage and a fuller cabin service; the low-cost carriers price the seat low and charge baggage and extras separately. Trekkers and pilgrims often travel with heavy or bulky luggage, so the baggage allowance is worth comparing carefully against the headline fare before choosing.

THB fares

BKK-KTM fares lift around the main trekking seasons — the clear-skied autumn and spring months — and the cooler-month pilgrimage period. For those windows, six to ten weeks of lead time is sensible. Outside them, the low-cost carriers’ early fares are the cheapest seats, and three to six weeks usually finds a good THB price. As always with low-cost fares, count baggage in before comparing, especially if you are carrying trekking gear.

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About Kathmandu

Kathmandu, set in a valley ringed by hills, is Nepal’s capital and the entry point for almost every kind of trip into the country. Its valley holds a dense concentration of temples, stupas and old royal squares, several of them UNESCO-listed, and the great stupa of Boudhanath is a focus for Buddhist travellers. Beyond the city, Kathmandu is the staging post for the Himalayan trekking regions. For Thai travellers it works as a destination, a pilgrimage stop and a gateway all at once.

FAQ

Which airlines fly Bangkok to Kathmandu? Direct BKK-KTM flights are operated by Thai Airways, Nepal Airlines, IndiGo, Thai AirAsia. Compare baggage allowance, fares and schedules in the carrier table above.

How long is the BKK-KTM flight and how often does it run? Block time is about 3.5 hours. The BKK-KTM route runs roughly 21 flights per week across all carriers.

How far ahead should I book BKK-KTM for the best fare? Booking 4-8 weeks ahead for regular dates, and 10-14 weeks for peak periods (Songkran, New Year, Hajj/Umrah season), typically saves 15-30%. See the month-by-month fare heatmap above.

What is the checked baggage allowance on BKK-KTM? It varies by carrier and fare class — full-service carriers on this route usually include 20-30 kg, while low-cost carriers sell it as an add-on. Confirm the current policy on the airline’s site before booking.

Do Thai passport holders need a visa for Nepal? visa-on-arrival 30 days. Check the latest requirements with the embassy or mfa.go.th before booking.

Related routes

• BKK airport
• KTM airport