Flights Chiang Mai to Kathmandu (CNX-KTM): Airlines, THB Fares

Chiang Mai to Kathmandu links northern Thailand directly with Nepal, sparing travellers from the country’s north a connection through Bangkok. The route carries Thai Buddhist pilgrims bound for Nepal’s sacred sites, trekkers heading for the Himalaya, and travellers with study or family ties between the two regions. At around 2 flights a week, it is a low-frequency, plan-ahead route.

Block time is close to 3.4 hours. With so few weekly departures, demand and availability matter more than usual — the route works best for travellers who can fix their dates early rather than those needing flexibility.

Corridor profile

Airlines & baggage

Airlines on this route

Nepal Airlines operates Chiang Mai–Kathmandu. As the single carrier on the route it sets the schedule and the cabin. The main practical constraint is the low frequency: with roughly two departures a week, there is little room to adjust dates, so the seat needs to be planned around the schedule rather than the other way round. Travellers carrying trekking gear or pilgrimage luggage should check the baggage allowance when booking.

Monthly market-low pattern (THB)

Fare trends

With only a couple of flights a week, CNX-KTM fares respond sharply to demand, and the autumn and spring trekking seasons together with the cooler-month pilgrimage period are the busiest. For those windows, eight to twelve weeks of lead time is sensible. Outside them there is more room. Because the route is small and infrequent, securing a seat early generally matters more than waiting for a marginally lower THB fare.

Seasonality & best time to book

Chiang Mai–Kathmandu fares move with demand. The cheapest windows fall outside school holidays, Songkran and New Year; book 4–8 weeks ahead for normal dates. As a Buddhist-pilgrim corridor, fares rise around religious festival dates and the pilgrimage season.

About Kathmandu

Kathmandu, in its hill-ringed valley, is Nepal’s capital and the entry point for nearly every trip into the country. The valley is dense with temples, stupas and old royal squares, several UNESCO-listed, and the great stupa of Boudhanath is a focus for Buddhist travellers. Beyond the city it is the staging post for the Himalayan trekking regions. For travellers from Chiang Mai and the Thai north, the direct link makes Nepal’s pilgrimage sites and mountains reachable without the detour south to Bangkok.

FAQ

Which airlines fly Chiang Mai to Kathmandu?

The CNX-KTM route is operated by Nepal Airlines. Compare baggage, alliances and fares in the table above.

How long and how often is the CNX-KTM flight?

Block time is ~3.4h, with ~2 flights per week across all carriers.

When is CNX-KTM cheapest to book?

The cheapest fare in our cache is ~฿7,189. Book 4–8 weeks ahead; avoid Songkran, school holidays and peak season to save 15–30%.

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Related

• CNX airport
• KTM airport