The honest answer to when you should fly Tehran to Bangkok is mostly about weather and demand at the far end. On three years of daily observations at the arrival airport, Jan-Feb, Nov-Dec gives the most comfortable combination of temperature and rainfall in Bangkok.
Averages below come from three full years of daily readings at Bangkok’s main airport, not from a seasonal generalisation. The warmest month is April (average high 35°C), the coolest is January (average low 21°C), and the wettest is September (328 mm).
| Month | Avg high | Avg low | Rainfall | Wet days | Tehran high |
|---|---|---|---|---|---|
| January good | 32°C | 21°C | 10 mm | 3 | 11°C |
| February good | 33°C | 24°C | 42 mm | 9 | 13°C |
| March | 34°C | 25°C | 72 mm | 12 | 17°C |
| April | 35°C | 27°C | 56 mm | 11 | 25°C |
| May | 34°C | 26°C | 231 mm | 26 | 31°C |
| June | 33°C | 26°C | 202 mm | 26 | 36°C |
| July | 32°C | 26°C | 273 mm | 28 | 39°C |
| August | 32°C | 26°C | 187 mm | 25 | 38°C |
| September | 31°C | 25°C | 328 mm | 29 | 33°C |
| October | 32°C | 24°C | 256 mm | 23 | 26°C |
| November good | 31°C | 23°C | 95 mm | 10 | 19°C |
| December good | 31°C | 22°C | 23 mm | 3 | 12°C |
Climate data: Open-Meteo reanalysis archive.
Bangkok runs 3.5 hours ahead of Tehran. Travelling east is the harder direction to adjust to, so if the trip is short, an early departure that lands in daylight is worth more than a marginally cheaper overnight.
We publish observed fares for this route when we have them, and say nothing when we do not — there is no estimate on this page. What holds regardless of the route:
Midweek departures are consistently cheaper than Friday and Sunday on most routes, because that is where demand sits rather than because of any pricing trick. Where we have observed fares for Tehran–Bangkok, the weekday breakdown appears further down this page; where we do not, we leave it out rather than estimate it.
Top-rated tours and experiences in Bangkok, ranked by traveller rating. Prices are per person and change with date and group size.
Nightly rates in Bangkok for a sample two-night stay for two adults from 29 Sep 2026, cheapest first. Rates move with your dates — check availability for a live quote.
| Airline | Code | Role |
|---|---|---|
| Iran Air | IR | Operates |
