Transit in Bangkok with a different air ticket

I'm a Bangladeshi citizen working for the UN, traveling from South Sudan to Bangkok with Ethiopian Airlines and taking another international flight with Biman Bangladesh Airlines on the same day three hours later from Bangkok to Dhaka, but the two tickets are booked separately.
How should I collect my luggage from Bangkok airport and drop it for the Bangkok Dhaka flight? Do I have to clear immigration first in Bangkok, then collect my luggage from the belt and then check in for the Bangkok-Dhaka flight, or there is an easier way? I don't have a Thailand visa.
Best Answer
Yes, you need a visa. You will need to go through immigration & customs to collect your luggage and check it in again, and to do so you need a visa for Thailand.
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Can you transit with different airlines?
If transit is made through the same airline, all process is handled by the airline. Transit flights can also be made through different airlines. In these cases, it is necessary to check the baggage policy of the airline. There are interline baggage agreements among the airports.Do you need another ticket for connecting flight?
A: It depends, but the general rule is NO. Some airlines will through check baggage onto separately ticketed flights, but some won't (even if both tickets are with the same airline). Some airlines will take pity if your delay is due to them, but others don't.Can you transit through Bangkok airport?
You can transit between international flights in Bangkok's Suvarnabhumi Airport. Ensure that your connecting flight is booked on the same itinerary and ticket. You must remain in the transiting area in the airport.Do I need another boarding pass for layover?
You might only receive your first boarding pass when you check-in for the first time. If so, then you will have to find the correct ticket counter at the layover airport and get your second boarding pass for the new flight.12 things to know about International transit transfer flight guideline Bangkok airport
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