Cheapest months to fly Kolkata → Bangkok
A fare-season table for CCU–BKK and the booking tactics that actually work.
By Vaanya Travels Editorial Desk · Updated 2026-07-12
Which is the cheapest month to fly Kolkata to Bangkok?
September is consistently the cheapest month on Kolkata–Bangkok, with one-way fares dipping to ₹6,000–₹8,000 on IndiGo — monsoon-season demand is lowest. May and early June run close. December–January is the most expensive stretch, often 2–3× September prices.
Fare seasons on CCU → BKK
| Months | Typical one-way fare | Notes |
|---|
| September | ₹6,000–8,000 | Cheapest; green season in Thailand |
| May–June, Feb | ₹7,000–9,500 | Shoulder value |
| Mar–Apr, Jul–Aug, Oct–Nov | ₹8,500–12,000 | Moderate; Songkran (Apr) spikes |
| December–January | ₹12,000–20,000+ | Peak; book 8–10 weeks out |
How far in advance should I book Kolkata–Bangkok?
Three to six weeks ahead is the sweet spot for this route in normal months; 8–10 weeks for December–January and Songkran. Last-minute fares occasionally dip mid-week in low season, but that is a gamble, not a strategy.
Three booking tricks that work on this route
- Fly mid-week — Tuesday/Wednesday departures average 10–18% below Friday–Sunday.
- Watch both airports — BKK (Suvarnabhumi) and DMK (Don Mueang) both serve Bangkok; comparing them on Vaanya often saves ₹1,000+.
- Book the return leg separately when one direction is in a sale — the combined split ticket can beat round-trip pricing.
Search live fares on Vaanya →
Frequently asked questions
Which airlines fly Kolkata to Bangkok non-stop?
IndiGo and Thai Airways group carriers operate the ~2h 40m non-stop; one-stops via Indian metros or Dhaka occasionally undercut them on price.
Are September fares low because of bad weather?
It is green season — expect short afternoon showers, not washouts. Bangkok city breaks and Gulf-side islands (Samui) work fine; Andaman-side seas (Phuket) are rougher.
Also read
Fares, prices, visa fees and rules shown are indicative as of July 2026 and change without notice — always verify the live fare on Vaanya and the latest visa rules on the official government site before travelling.
