Tribhuvan International Airport (KTM, ICAO VNKT) is in Kathmandu, Nepal. It is the based hub of Nepal Airlines and Thai Airways. In the SiamFlights catalogue, KTM is served by 4 airlines across 2 routes (0 outbound, 2 inbound).
Airport at a glance
Our catalogue records 0 outbound and 2 inbound corridors at Tribhuvan International Airport (KTM / ICAO VNKT), serving Kathmandu, Nepal, across 4 carriers with 2 of them based here. Time zone Asia/Kathmandu. Frequency across the corridors touching this field totals about 23 departures a week.
| Attribute | Detail |
|---|---|
| IATA / ICAO | KTM / VNKT |
| City / country | Kathmandu, Nepal |
| Direct destinations (catalogued) | 0 |
| Reached from (origins) | 2 |
| Based hub carriers | Nepal Airlines and Thai Airways |
| Coordinates | 27.697, 85.359 |
A base changes the outcome when things break. Nepal Airlines and Thai Airways are based at KTM, meaning aircraft, crew and operations staff sit on site. When a flight is cancelled the odds of a seat on the next rotation, or of a spare airframe, are far better at a base than at an outstation the carrier touches once a day. It is why the leg departing an airline’s own base usually recovers faster than the one returning to it.
Coordinates are for checking, not decoration. KTM sits at 27.6966, 85.3591. That is genuinely useful when booking a room or a transfer, because “near the airport” is claimed to wildly different standards. In a large city, map distance and real travel time in peak hours diverge sharply — read the travel time for the hour you will actually move, not the kilometre figure.
Airlines serving KTM
4 carriers appear at KTM in our catalogue and we hold an airline row for 4 of them, with baseline baggage spanning 7 to 30 kg. Alliances present: Star Alliance. 2 of them are based here. The field runs on Asia/Kathmandu, ICAO VNKT.
| Airline | Alliance | Baggage | Role |
|---|---|---|---|
| Nepal Airlines (RA) | non-aligned | 30 kg | hub |
| Thai Airways (TG) | Star Alliance | 30 kg | hub |
| IndiGo (6E) | non-aligned | 15 kg | |
| Thai AirAsia (FD) | non-aligned | 7 kg |
“Serves” is not “flies daily”. This list covers every carrier appearing on a corridor into or out of KTM in our catalogue. Some fly seasonally, some a few times a week, and some sell as the marketing carrier on a partner’s aircraft. The number that matters to your plan is how many actually quote your dates — usually fewer than the full list.
The 7–30 kg range is two business models under one roof. The low end comes from unbundled fares that sell hold baggage separately; the high end from full-service carriers that include it. At the same airport those two desks price excess weight on different scales and by different methods. Connect between the two on separate tickets and a bag that cleared the first sector may not clear the second.
KTM route overview
KTM has 0 outbound corridors in our catalogue, roughly 0 departures a week All figures are estimates of the standard schedule. 2 of those corridors carry a cached fare; each route page shows its dated observation. The field runs on Asia/Kathmandu, ICAO VNKT. The corridors touching this field connect 2 countries in our catalogue.
Inbound
| Route | Freq/wk | Hours | Market low (mid-2026) |
|---|---|---|---|
| Bangkok (BKK) → Kathmandu (KTM) | 21× | 3.5 | ฿11,429 |
| Chiang Mai (CNX) → Kathmandu (KTM) | 2× | 3.4 | ฿7,189 |
This field sits in our catalogue as a destination. We record 2 inbound corridors into it, splitting 2 short-haul (<4h), and no outbound guides — we build route pages only for journeys starting in Thailand. Departures from here exist; they simply have no page in this set yet. Read the carrier’s own schedule for the return.
Outbound and inbound are asymmetric because this is a catalogue boundary. We record 0 outbound and 2 inbound corridors for KTM. The gap reflects which route guides we chose to build — weighted to what travellers from Thailand search — not one-way service. The return flights exist whether or not we have published a page for them yet.
Corridors & fares from KTM
The 2 corridors at KTM break down as 2 short-haul (<4h), serving mainly Buddhist pilgrims. We hold a cached fare for 2 of 2 routes; each route page shows its own dated fare observation. Frequency across the corridors touching this field totals about 23 departures a week.
Most KTM corridors here serve Buddhist pilgrims travellers. The mix is 2 short hops (under 4 h). Fares are shown in Thai baht (THB), and each route guide below carries live cached prices.
Why some rows have no price. We capture lows in passes, and not every corridor returns a value each time. Seasonal routes, thin routes and routes sold through narrow channels report irregularly. An empty cell means no capture succeeded in the latest pass — not that the route is closed or expensive. We leave it blank rather than interpolate, because plausible-looking estimates are exactly what makes a table untrustworthy.
Everything is shown in baht, and that matters more than it looks. Fares are converted to THB so they compare on one page, but the underlying prices are set in the currency of the market that issues the ticket. The same corridor can price differently issued in different countries, and the exchange rate moves between our capture passes. Read these as a ranking, not as accounting figures.
Direct flights to KTM — 2 routes
Our catalogue records 2 inbound corridors into KTM from 1 country, block times 3.4 to 3.5 hours. Frequency figures are estimates combining every carrier on the corridor. Frequency across the corridors touching this field totals about 23 departures a week.
Direct destinations are not all reachable destinations. This list is the nonstop network in our catalogue. Everything else is reachable by connecting at a hub, which widens the choice and adds a point where the plan can break. If you must connect, make a single ticket the default and only split it when the saving is large enough to be worth the risk you are taking on yourself.
The destination country sets the rules, not the departure airport. The corridors here span 1 country, each with its own aviation regulator, visa regime and transit conditions. What you are owed changes with the destination and the direction of travel, not with the airport you left from. The route guides carry the detail per corridor.
Destination context
The 2 corridors at KTM break down as 2 short-haul (<4h), serving mainly Buddhist pilgrims. We hold a cached fare for 2 of 2 routes; each route page shows its own dated fare observation. Our catalogue records 0 outbound and 2 inbound corridors here.
Kathmandu is mainly a destination for Buddhist pilgrimage travel from Thailand. Local currency NPR. Visa for Thai passports: Nepal tourist visa on arrival at Tribhuvan airport or online eVisa (USD 30/50/125 for 15/30/90 days). Checked against the official source https://immigration.gov.np/eta-visa-nepal on 2026-10-23; rules change, so re-check before buying a ticket.
Why some rows have no price. We capture lows in passes, and not every corridor returns a value each time. Seasonal routes, thin routes and routes sold through narrow channels report irregularly. An empty cell means no capture succeeded in the latest pass — not that the route is closed or expensive. We leave it blank rather than interpolate, because plausible-looking estimates are exactly what makes a table untrustworthy.
Everything is shown in baht, and that matters more than it looks. Fares are converted to THB so they compare on one page, but the underlying prices are set in the currency of the market that issues the ticket. The same corridor can price differently issued in different countries, and the exchange rate moves between our capture passes. Read these as a ranking, not as accounting figures.
Time zone and connecting at KTM
KTM runs on Asia/Kathmandu, 1.25h behind Bangkok. The gap is constant year-round. Every time printed on a boarding pass is local to that airport rather than an elapsed duration, so subtracting one from the other gives you the wrong number.
Offsets make overnight flights deceptive. With KTM 1.25h behind Bangkok, a late-night departure can arrive the same morning or the next one on paper for identical flying time. That is the single most common reason transfers and first hotel nights get booked on the wrong date. Read the date on the final sector’s boarding pass, then confirm anything on the ground.
Minimum connection time is not in our data. Every airport publishes one, and the figure differs for domestic-to-domestic, international-to-international and terminal-change connections. A booking system will not sell you less than that on a single ticket — but it will happily let you build less than that yourself across two tickets. That is where passengers most often create risk without realising it.
FAQ
Where is KTM airport located?
KTM (ICAO VNKT) is in Kathmandu, Nepal.
Which airlines serve KTM?
4 airlines serve KTM, including Nepal Airlines, Thai Airways, IndiGo and Thai AirAsia. Compare baggage and alliances in the table above.
How many routes run from/to KTM?
The SiamFlights catalogue lists 0 outbound and 2 inbound routes for KTM.
Is KTM an airline hub?
KTM is a primary hub for Nepal Airlines and Thai Airways.
Do Thai passports need a visa for Kathmandu?
Visa for Thai passports: Nepal tourist visa on arrival at Tribhuvan airport or online eVisa (USD 30/50/125 for 15/30/90 days). Checked against the official source https://immigration.gov.np/eta-visa-nepal on 2026-10-23; rules change, so re-check before buying a ticket.
What is the difference between KTM and VNKT?
KTM is the three-letter IATA code used on tickets and bag tags; VNKT is the four-letter ICAO code used in flight plans and operational documents. They are different systems, not an inconsistency.
How far is KTM from Bangkok time?
KTM runs on Asia/Kathmandu, 1.25h behind Bangkok. It does not change clocks seasonally, so the gap is constant.
Why do some KTM corridors show no fare?
Because no capture succeeded in the latest pass of our cache. Seasonal and low-frequency corridors report irregularly. A blank is not a closed route or an expensive one.