Kolkata to Bangkok: the post-Durga Puja October fare window Indian travellers keep overlooking
By Saanvi Iyer (Saanvi Iyer writes offbeat destination guides for Indian travellers — places that work in monsoon, shoulder-season picks, and the cities Indian first-time international travellers underrate. Based in Bangalore, perpetually mid-itinerary.) · Published · 10 min read
After Durga Puja ends in October, Kolkata sees a brief but genuine post-festival lull in travel demand. This window — mid-October to late November — coincides with Thailand's dry season beginning, giving Kolkata travellers a sweet spot where flights are cheaper and Bangkok is at its most hospitable.
TL;DR — the case for post-Durga Puja Bangkok
The best time to fly from Kolkata to Bangkok is mid-October to late November — immediately after Durga Puja's peak travel surge subsides. Bangkok's high season begins around November, and Thailand is lovely from October onwards as the monsoon clears. Kolkata-Bangkok flights in this window are typically 15–30% cheaper than December-January peak, and Bangkok itself is less crowded than during the Christmas and New Year surge. Both IndiGo and Thai AirAsia operate direct or near-direct options from Kolkata to Bangkok that make this an easy trip to book.
Why Durga Puja creates a unique fare window for Kolkata travellers
If you're not from Bengal, here's the context: Durga Puja is the biggest festival in West Bengal, and the days around it (Shashti through Dashami — typically 5–6 days of peak celebration) see a massive surge in domestic and short-haul international demand from Kolkata. Bengalis travel home to Kolkata for Puja, and Kolkatan families sometimes take international trips before or just after. Flights in and out of Kolkata (CCU / Netaji Subhas Chandra Bose International) during Puja week are expensive and fill up fast.
But here's the thing: the moment Dashami ends and Bijoya Dashami passes, demand falls off a cliff. The next major travel trigger from Kolkata is Diwali (which, in 2026, falls in October as well — but Diwali is not the same magnitude of travel trigger in Bengal as Puja). Between the end of Durga Puja and the December Christmas-New Year surge, there's a real, underutilised window of 5–6 weeks where Kolkata-Bangkok fares are at their leanest.
I've watched this pattern for a few years. Post-Puja October is genuinely one of the calmest demand periods for Kolkata's international routes. Airlines filling seats to Bangkok, Singapore, and Dhaka in late October are not seeing the volume they do in December, and fares reflect that.
What is Bangkok like in October and November?
Thailand's weather follows a monsoon calendar that's slightly offset from India's. October is typically the tail of Thailand's wet season — Bangkok can still get afternoon showers in early October, and the Gulf of Thailand side (Koh Samui, Koh Phangan) is genuinely wet until mid-November. But here's what most Indian travellers don't know: Bangkok city itself and the Andaman coast (Phuket, Krabi, Koh Lanta) get much less rain in October than the Gulf side, and are perfectly enjoyable.
October: Bangkok is warm (around 30–34°C), with occasional afternoon showers that pass quickly. The city is not flooded. Temples, street food markets, rooftop bars, the Grand Palace — all accessible and enjoyable. Phuket and Krabi are entering their high season from October. If you're doing a Bangkok + Phuket trip, October is actually excellent.
November: This is when Thailand enters full high season. Bangkok is beautiful — lower humidity than May-July, warm days, clear evenings. November is genuinely one of the best months to visit all of Thailand. Fares from Kolkata to Bangkok in November are slightly higher than October but still well below December.
December onwards: Peak season. Flights surge. Khao San Road gets hectic. Christmas and New Year are Bangkok at its most festival-crowded and most expensive. If you want to experience that, it's wonderful — but you'll pay for it.
Which airlines fly Kolkata to Bangkok, and what does it cost?
From Kolkata (CCU), here are the main options to Bangkok (Suvarnabhumi, BKK or Don Mueang, DMK):
IndiGo: IndiGo operates Kolkata to Bangkok routes (check for direct vs one-stop via other Indian cities — the routing can change seasonally). IndiGo's CCU-BKK fare in the post-Puja window typically ranges around ₹12,000–₹22,000 return, depending on dates and how far ahead you book. In December, the same ticket can easily run ₹20,000–₹35,000 or higher around Christmas week. These are realistic ranges from fare calendars I've tracked — verify on FlightGPT for real-time prices.
Thai AirAsia: Thai AirAsia operates Bangkok (DMK) to Kolkata flights. As a Southeast Asian LCC, they sometimes offer very competitive fares — particularly on a direct Kolkata-Bangkok route. Worth searching separately on their website or through FlightGPT, especially for those who don't mind Don Mueang airport (which is perfectly fine, just further from central Bangkok than Suvarnabhumi).
Via Dhaka or Yangon (transit options): Some travellers from Kolkata find routing via Dhaka (on Biman Bangladesh Airlines or US-Bangla) or via Yangon to be cheaper alternatives — though the transit and logistics make these worth considering only if the fare saving is substantial. Most travellers are better served by a direct IndiGo or Thai AirAsia option.
The post-Puja window (mid-October to mid-November) is when the fare gap between IndiGo and Thai AirAsia narrows — both airlines have seats to fill and are pricing to attract discretionary travellers.
Practical planning: booking the post-Puja Bangkok trip
A few things I've learned booking this specific window:
- Book 4–6 weeks before travel. Kolkata-Bangkok in October isn't a route where you need to book 4 months ahead. The sweet spot is often 4–6 weeks out — fares haven't cratered to last-minute desperation prices, but airlines are clearly pricing to fill seats. I've found particularly good fares 30–40 days out in this specific window.
- Be careful around Diwali. In 2026, Diwali falls in late October. The 3–4 days around Diwali may see a small fare uptick even in the post-Puja lull. Target dates that clear the Diwali long weekend if you want the cheapest October fares.
- Check Don Mueang (DMK) separately. Thai AirAsia and some IndiGo flights operate via DMK, not Suvarnabhumi (BKK). DMK is manageable and well-connected by bus and taxi to Bangkok, but check your transfer time carefully if you're connecting onward.
- Thailand visa for Indian nationals: As of 2026, India has visa-on-arrival arrangements with Thailand (or e-visa options). Always verify the current visa status on the Thai Embassy website before booking, as visa policies can change. Check FlightGPT's visa tool for the latest requirements for Indian passport holders.
- Currency: Thai Baht (THB). A zero-markup forex card (Niyo Global, Wise, Scapia) loaded in USD or SGD and withdrawn at Bangkok ATMs is the most cost-efficient way to carry money. Always decline Dynamic Currency Conversion at ATMs.
Kolkata-Bangkok for Bengalis: the cultural dimension
There's a reason Kolkata has long had a strong Bangkok connection beyond just proximity. The Thai-Bengali historical and culinary overlap is real — Bengali travellers in Bangkok often note the shared love of fish, rice, and sweetmeats. The fish dishes at Bangkok's seafood markets feel oddly familiar. Kolkata's Thai consulate processes a high volume of visas relative to the city's size.
Bangkok is also an easy first international trip for Bengali families who haven't travelled abroad before. It's 2 hours from Kolkata, comparatively affordable, safe, well-signposted in English, and has a strong Indian food backup (there are Indian restaurants in Silom, Sukhumvit, and the areas around India-popular hotels) for those nervous about local food. Temple culture (Wat Pho, Wat Phra Kaew) resonates with Indian travellers. Shopping at MBK, Chatuchak and Pratunam is a draw for those who like markets.
For a 5-night October Bangkok trip from Kolkata, a couple staying in a decent Sukhumvit 3-star can expect to spend around ₹55,000–₹85,000 all-in (flights + hotel + food + local transport + experiences) — making it one of the more affordable international options for Kolkata travellers. See also October shoulder-season thinking for domestic trips if Bangkok doesn't fit this year.
Bottom line
The post-Durga Puja October window is one of the most underutilised travel windows for Kolkata-based Indian travellers. You have a brief period — roughly 4–5 weeks — where flight demand from CCU has fallen from festival peaks, Thailand's high season is just beginning, and prices on the Kolkata-Bangkok corridor are at their most reasonable before December rebuilds fares. Book 4–6 weeks in advance, clear the Diwali long weekend, pick IndiGo or Thai AirAsia depending on which has better total cost (including bags), and use the saved money to eat more pad see ew.
Search Kolkata to Bangkok fares on FlightGPT to see the October-November fare calendar in one view. And check FlightGPT's visa tool for current Thailand visa requirements for Indian passport holders before you lock in the dates.
Frequently asked questions
What is the best time to fly from Kolkata to Bangkok?
The best value window is mid-October to late November — after Durga Puja demand subsides and before December Christmas-New Year peak. Thailand's weather in this period is very good (Bangkok and Andaman coast are entering high season). November is particularly excellent for weather, while mid-to-late October offers the lowest fares of the shoulder-season window.
Which airlines fly direct from Kolkata to Bangkok?
IndiGo and Thai AirAsia are the primary options on the Kolkata–Bangkok corridor as of 2026. IndiGo routes may be direct or one-stop via another Indian city depending on schedule; Thai AirAsia typically flies to Don Mueang (DMK). Check both on FlightGPT for the current schedule and total fare comparison including baggage.
How much do Kolkata to Bangkok flights cost in October vs December?
In the post-Puja October window, return fares from Kolkata to Bangkok typically range around ₹12,000–₹22,000 per person, depending on airline and booking lead time. In December, particularly around Christmas and New Year, the same routes regularly run ₹22,000–₹40,000 or more. These are realistic fare ranges — check FlightGPT for real-time pricing on your specific dates.
Do Indian nationals need a visa for Thailand?
As of 2026, India and Thailand have a visa-free or visa-on-arrival arrangement for Indian passport holders for short stays (typically up to 30 days). However, visa policies can change — always verify the current requirements on the Royal Thai Embassy website or the Thai Ministry of Foreign Affairs before booking. FlightGPT's visa tool also tracks current India-Thailand visa status.
Is October a good month to visit Bangkok weather-wise?
Yes, particularly from mid-October onwards. Early October can have afternoon showers in Bangkok, but they are short-lived. Phuket and Krabi (Andaman coast) are entering high season from October — excellent for beach trips. Koh Samui and the Gulf coast side of Thailand gets more rain in October-November, so plan beach time on the Andaman side if travelling in October.
How do I get the cheapest Kolkata to Bangkok fare?
Book 4–6 weeks before travel in the mid-October to mid-November window for the best combination of low demand and good availability. Use FlightGPT to compare IndiGo and Thai AirAsia on a flexible date calendar. Factor in baggage fees in the total cost — base fares from both carriers often exclude check-in bags. Avoid the Diwali long weekend (late October in 2026) for the lowest fares in this window.