Bangkok to Kathmandu is the main gateway between Southeast Asia and Nepal, flown nonstop in about three and a half hours. It is a hugely popular route for trekkers heading to the Himalayas and for Nepali travellers connecting through Bangkok. This guide covers who really flies the route, a fair return fare in baht, and how to book around Nepal’s busy trekking and festival seasons.
Route: Bangkok (BKK) → Kathmandu, Tribhuvan International (KTM)
Distance: approximately 2,160 km (1,340 miles)
Non-stop flight time: about 3h 30m westbound, a little shorter (~3h 20m) on the return
Direct flights: Yes — Thai Airways, Himalaya Airlines and Nepal Airlines fly non-stop from Suvarnabhumi (BKK), joined by low-cost carriers Thai AirAsia and Thai Lion Air. Around 16 nonstops a week in total.
Fares from Bangkok to Kathmandu (THB)
Nepal’s travel calendar drives the fares. The busiest, priciest windows are the autumn trekking season (September–November, which also brings the Dashain and Tihar festivals) and spring (March–April, prime Everest and Annapurna season). The cheapest fares fall in the summer monsoon (June–August) and the cold, clear winter of December–January. The table below shows when the route is busiest. We no longer print per-month fare estimates here, because they were never measured.
| Month | Demand |
|---|---|
| January | low-medium |
| February | medium |
| March | high (spring trekking) |
| April | high |
| May | medium |
| June | low (monsoon) |
| July | low |
| August | low-medium |
| September | high (autumn season) |
| October | very high (Dashain/Tihar) |
| November | high |
| December | medium |
We do not quote a target fare for this route. Our price tracking holds no recorded observations for it, so a “typical” or “good deal” figure here would be an estimate dressed up as a measurement — so this page leaves it out rather than guess. The seasonal pattern above is the part we can stand behind; check the live fare for the number.
Airlines on this route
Non-stop full service (about 3h30m):
- Thai Airways — the most frequent operator, with around two nonstops a day on widebody aircraft; a full-service cabin with checked baggage, meals and generous frequencies.
- Himalaya Airlines — a Kathmandu-based carrier flying the route on A320-family jets, typically several times a week and often competitive on price.
- Nepal Airlines — the national flag carrier operates a couple of nonstops a week on its A320s, a straightforward direct option.
Non-stop low-cost (usually cheapest):
- Thai AirAsia — budget nonstops on the Airbus A320; the lowest headline fares, but bags and seats are extras.
- Thai Lion Air — another low-cost option on the route, worth pricing alongside Thai AirAsia for the cheapest all-in fare.
With several nonstops a day between them, there is rarely any reason to take a one-stop routing to Kathmandu. For the lowest fare, compare the low-cost carriers against Thai Airways directly, especially in the quieter months when the flag carrier discounts.
When to book & how to save
- Book 1–3 months ahead for the autumn (September–November) and spring (March–April) trekking peaks, when seats fill early and fares are highest.
- Travel in winter (December–January) for lower fares and famously clear mountain views, if you can handle chilly mornings in Kathmandu.
- The monsoon (June–August) is the cheapest of all — expect rain in the hills and possible delays on onward flights to mountain airstrips.
- Watch the bags: Thai AirAsia and Thai Lion’s cheapest fares are cabin-baggage only, so trekkers with heavy kit should add a checked bag before comparing against Thai Airways.
- Mind the festival dates: the Dashain and Tihar festivals (September–October) send fares soaring and fill seats weeks ahead — book well in advance if your trip overlaps.
Arriving in Kathmandu
Flights land at Tribhuvan International Airport (KTM), Nepal’s only international gateway, just 6 km east of the city centre. Nepal offers visa on arrival for most nationalities, so allow time for the queue and bring US dollars or a card for the fee. A prepaid or metered taxi to Thamel, the main tourist and trekking district, takes 20–40 minutes and costs roughly ฿300–700 (about NPR 700–1,500) depending on traffic and your bargaining. Many hotels and trekking agencies include a free airport pickup, which is worth arranging in advance to skip the arrivals scrum.
Frequently asked questions
How long is the flight from Bangkok to Kathmandu?
Non-stop flights take about 3 hours 30 minutes westbound from Bangkok to Kathmandu, and roughly 3 hours 20 minutes on the return with the winds. Thai Airways, Himalaya Airlines, Nepal Airlines and the budget carriers all fly it direct, so a connection is not needed.
Are there direct flights from Bangkok to Kathmandu?
Yes. Thai Airways, Himalaya Airlines and Nepal Airlines fly non-stop from Suvarnabhumi (BKK), and low-cost carriers Thai AirAsia and Thai Lion Air also serve the route direct. Between them there are around 16 nonstops a week, so direct flights are available most days.
How much does it cost to fly from Bangkok to Kathmandu?
A typical economy return runs about ฿6,500–12,000 depending on the season. The best deals dip to around ฿5,000–5,600, usually in the summer monsoon or winter, while the autumn and spring trekking peaks push fares toward ฿13,500.
What is the cheapest month to fly from Bangkok to Kathmandu?
June, July and December are usually the cheapest months to fly. Avoid October (the Dashain and Tihar festivals plus prime trekking), along with September, November and the March–April spring season, which carry the highest fares.
Which airlines fly from Bangkok to Kathmandu?
Non-stop operators are Thai Airways (the most frequent), Himalaya Airlines and Nepal Airlines on the full-service side, plus low-cost carriers Thai AirAsia and Thai Lion Air, which usually offer competitive headline fares.
Which airport do I fly into in Kathmandu?
You arrive at Tribhuvan International Airport (KTM), Nepal’s only international gateway, about 6 km east of central Kathmandu and a short taxi ride from the Thamel tourist and trekking district.
How far in advance should I book Bangkok to Kathmandu flights?
For the autumn and spring trekking peaks, book 1 to 3 months ahead, as fares rise and seats fill early — especially around the Dashain and Tihar festivals. For monsoon or winter travel you can often find good prices a few weeks out, but earlier is always safer.
Is it cheaper to fly on weekdays?
Usually, yes — midweek departures (Tuesday to Thursday) tend to be a little cheaper than weekend flights. Being flexible by a day or two, and pairing weekday flights out and back, save a little on a return.
Do I need a visa to visit Nepal from Bangkok?
Most nationalities can get a visa on arrival at Tribhuvan Airport (KTM), issued for 15, 30 or 90 days for a fee payable in cash or by card. Fill in the arrival form, allow time for the queue, and bring US dollars as a backup. Check your own nationality’s requirements before you fly, as a handful of countries must arrange a visa in advance.
Route and schedule details from current airline schedules; last reviewed July 2026. Indicative economy returns — always check the live fare before booking.
