The fact that you had to go through security indicates a change in security rules between regions. This is since airlines have to follow certain norms for flights entering different regions, in this case Europe. This happened to my while flying Canada to Europe via Iceland where we got off, passed security and got back on.
Even if you were not changing ...
So, presuming you are an Indian citizen since you are leaving from India, you will need a visa. Thailand offers 12 hours of Visa free transit time, whereas your layover is 12 hours and 20 minutes.
Passengers transiting through Bangkok (BKK) with a confirmed onward
ticket for a flight to a third country within 12 hours. They must stay
in the ...
Airlines are required to return a passenger to their point of departure if the passenger is refused entry at a transit point (or a destination), and they must do so at the airline's expense. Therefore, they're very careful to check whether a passenger has the correct travel documents.
The database at Timatic (here's an article about Timatic on Wikipedia) ...
No, for a period less than 12 hours a Indian citizen does not seem to need a Transit visa for Thailand.
The Royal Thai Embassy in Australia
type India in Box for Passport of which Country do you hold?
select Transit Visa from result
and all information you need can be seen.
The site is very easy to use
wish other countries would make it as easy
Most buses to Hua Hin leave not from Ekkamai, but from the New Southern Bus Terminal (Sai Tai Mai). However, Sai Tai Mai is in far western Bangkok a solid 10 km from the city center and not reachable by BTS/MRT, so you're likely to run into traffic jams just trying to get there...
I know you said "bus only", but I would still recommend the train. Trains ...
Yes, you do. When changing airports you have to leave the arrival airport's transit area and enter Thailand in order to travel to the departure airport.
You can try Visa on arrival
No, but: while you will not go through "actual" immigration and customs, you will need to go through a passport examination that's an awful lot like immigration (complete with long snaking queues at times) and a strict security check afterwards. Fortunately you have plenty of time to connect, so you should be fine, just follow the signs for Transfers.
Indian citizens can use Visa on Arrival for a stay of up to 15 days. The fee for this visa is 2000 THB and must be paid in local currency. Sometimes there is a long queue, and there is a fast track option for an additional fee of 200 THB.
At the time of writing, the visa on arrival fee has been waived
Visa on Arrival fee waiver was first implemented from ...
Visa required, except for Passengers transiting through
Bangkok (BKK) with a confirmed onward ticket for a flight to a
third country within 12 hours. They must stay in the
international transit area of the airport and have documents
required for the next destination.
This TWOV facility does not apply to passengers traveling
You always get one boarding pass per plane you enter.
If you booked it in on one ticket, you typically get all boarding passes at first check-in, and your luggage is nearly always checked through - if you bought separate tickets, it's your problem to every time pick your luggage up and check it in again, and get the further boarding passes.
Ok, after coming home from the aforementioned trip, I can now confirm this:
There is a food court called ”Food Stop” that is located right after the special international-to-domestic security and immigration checkpoint. The outlets available at the time of writing are:
The Coffee Club*
2 Ramen joints
3 Thai food joints
A couple of ...