Flights Bangkok to Kolkata (BKK-CCU): Airlines, THB Fares

Bangkok to Kolkata is one of the shortest international hops out of Bangkok, with around 21 flights a week and a block time of well under three hours. Eastern India sits close to Thailand, and the route carries a steady mix of Indian visitors heading for Thailand, Thai travellers bound for Kolkata, and passengers connecting onward across the region.

Corridor profile

The BKK–CCU corridor runs about 21 departures a week across 3 carriers, with an average block time of 2.7 hours, and the lowest fare the feed returned for this route is ฿8,940. The frequency figure counts every carrier on the route combined, not any single airline.

“Direct” and “nonstop” are not synonyms. The 2.7-hour figure is an average gate-to-gate block time for a nonstop, taxi time included but connections, check-in and immigration excluded. In booking systems “direct” means only that the flight number does not change — a single-number flight can still put down en route to refuel or pick up passengers. The word that guarantees no intermediate landing is nonstop. Filter on that one if the clock matters.

Our own demand score. This corridor scores 6/10. That is an editorial ranking we use to prioritise how deeply we cover a route — it is not a passenger count and not a price index. A high score means a corridor people search and where options exist, which usually means price competition. A low score does not mean a bad route; it means fewer options, and where options are few, flexibility gets expensive.

Airlines & baggage

Baseline baggage on BKK–CCU runs 7–25 kg across the 3 of 3 carriers on the route for which we hold a row. These are carrier reference baselines, not entitlements attached to every ticket: cabin class, fare brand and frequent-flyer status all change the weight you actually get.

The low number in the table is not a checked allowance. The 7 kg baseline we record for IndiGo and Thai AirAsia belongs to an unbundled fare structure, which by design reflects the cabin entitlement. Hold baggage is sold per sector and priced by the weight tier you pick and how early you buy it. The practical effect is that the cheaper headline fare closes most of its gap the moment you add one bag. Compare totals after bag, seat and meal are selected — that is the only comparison that holds against a full-service carrier.

Airlines on this route

3 carriers operate BKK–CCU — 1 full-service and 2 low-cost. Alliances present on the route: Star Alliance. Multiple carriers only affect price when both sides are actually selling in the same window. We hold 4 monthly lows spanning a 57% range.

Three carriers fly BKK-CCU: IndiGo and Thai AirAsia operate it low-cost, while Air India runs a full-service cabin. The budget carriers sell a slim base fare with baggage added on, suited to a short trip with light luggage; Air India includes a checked allowance and meals. All three fly direct, so the trip is short whichever you pick.

Carrier count is not year-round competition. Some operators fly this corridor seasonally or on selected weekdays. In a week where only one is genuinely selling, the fare behaves like a monopoly fare. The fastest check is how many carriers actually quote your dates, not how many have ever served the route.

Compare totals, not headline numbers. IndiGo and Thai AirAsia price the seat low and sell bag, seat and meal separately; Air India fold them into the fare. Comparing the first number you see compares two different products. Add one bag and one seat assignment on both sides, then read the final figure. On medium-haul and longer, the remaining gap is frequently smaller than the search page suggests.

Fare trends

Between 2026-W20 and 2026-W31 we captured the BKK–CCU low 3 times, ranging ฿3,125 to ฿8,940 — a 186% spread. The cheapest reading fell in week 2026-W29, and from first capture to last the low moved up 120%.

Being a short sector with two low-cost carriers competing, BKK-CCU is among the cheaper international routes from Bangkok. Demand lifts around Durga Puja and the Indian wedding season, when booking a month or two ahead helps. For ordinary dates, two to four weeks of lead time is often enough for a low economy fare in THB, especially travelling with cabin baggage only.

How to read a 186% spread. The gap between the cheapest and dearest week is the size of the movement this corridor showed in the window we observed. A wide spread means timing matters a lot; a narrow one means the fare is stable and watching it is not worth your time. The figure measures only the lows we captured, not every seat sold that week.

Seasonality & best time to book

Our catalogue lists 3 carriers on this city pair. BKK–CCU is a regional corridor with a shorter booking window than long-haul. The fare tracks low-cost promotional cycles and Thai long weekends more than any season at the destination, and Songkran plus the consecutive-holiday blocks are the tightest weeks of the year.

Bangkok–Kolkata fares move with demand. The cheapest windows fall outside school holidays, Songkran and New Year; book 4–8 weeks ahead for normal dates.

Frequency is seasonal too, not just price. The 21 weekly departures in our catalogue is an estimate of the standard schedule; carriers add and cut rotations by season. That means the cheapest month can also be the month with the fewest options — and with fewer rotations, one cancellation hurts more. Read price and frequency together.

What our data actually shows. Of the 4 months we captured, the cheapest reading was Feb 2027 at ฿2,814 and the dearest Oct 2026 at ฿4,425. These are observations, not a forecast for next year: a month that read cheap in one pass may not in the next. Use it as a starting point for comparison, not a fixed calendar.

About Kolkata

Kolkata (CCU) sits in India. The flight from Bangkok runs about 2.7 hours. The lowest fare the feed returned for this route is ฿8,940 on a 2026-10-10 departure. The trend figures rest on 3 weekly captures since week 2026-W20.

Kolkata is the cultural capital of eastern India — the former colonial capital, known for its literature, theatre and intellectual life as much as for the Victoria Memorial and the tram-lined streets of the old centre. It is also a major medical-care hub for the region. For Thai travellers it is a close, affordable and characterful Indian city, and a practical gateway into India’s east.

What visa-free does not mean. Entering without a visa in advance is not a right to work, not a right to study, and not a guarantee of admission — the officer at the border still decides. The conditions most often forgotten are remaining passport validity, an onward ticket and proof of accommodation. All three are asked for more often than travellers expect, and their absence lets the airline refuse boarding at the departure airport.

Passenger rights on BKK–CCU

Our catalogue lists 3 carriers on this city pair. Departures from Thailand fall under Thailand CAAT; the return from Kolkata falls under India DGCA (CAR Section 3). The two regimes are not the same, and what you are owed changes with the direction of travel and the nationality of the operating carrier — never with the fare you paid.

No European-style compensation schedule applies here. The destination sits with India DGCA (CAR Section 3), which typically imposes duty of care, re-routing and refund obligations but no fixed EU261-style cash bands. The enforceable floor is therefore the airline’s own conditions of carriage plus Thailand CAAT rules for departures from Thailand. Read the conditions of carriage before you buy — that is the document that actually binds you.

Baggage loss and delay run on a separate rulebook. An airline’s liability for baggage that is lost, damaged or delayed on an international journey sits under the Montreal Convention 1999 where both the origin and destination states are parties. The caps are denominated in SDR and revised periodically, so only the current figure is usable. This frame is entirely separate from delay compensation: you can have no compensation claim and still have a baggage claim.

FAQ

Which airlines fly Bangkok to Kolkata?

The BKK-CCU route is operated by IndiGo, Air India and Thai AirAsia. Compare baggage, alliances and fares in the table above.

How long and how often is the BKK-CCU flight?

Block time is ~2.7h, with ~21 flights per week across all carriers.

When is BKK-CCU cheapest to book?

Book 4–8 weeks ahead; avoid Songkran, school holidays and peak season to save 15–30%.

What exactly is the lowest fare shown on this page?

It is the cheapest fare our cache has recorded on BKK–CCU, captured one snapshot at a time. It is not an average, not a live quote and not a guarantee that a seat still exists at that price. Use it as a reference floor, then check live pricing.

What is the difference between a direct and a nonstop flight?

Direct means the flight number does not change, but the aircraft may still land en route. Nonstop means no intermediate landing at all. If the clock matters, filter on nonstop, not direct.

If my BKK–CCU flight is cancelled, who is responsible?

The destination sits with India DGCA (CAR Section 3), which generally imposes duty of care, re-routing and refunds but no fixed EU261-style cash bands. The enforceable floor is the airline’s conditions of carriage plus Thailand CAAT rules for departures from Thailand.

Will my bag be through-checked if I book two separate tickets?

No. Through-checking happens only when every sector is on one ticket or an interline agreement exists. On separate tickets you reclaim the bag, clear the transit country’s immigration and check in again — and a missed connection is a new ticket at your cost.

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Related

• BKK airport
• CCU airport