Can I change my flight to an earlier one during a layover in Bangkok?

The question addresses whether passengers can change to an earlier flight during a layover in Bangkok. Responses indicate that the ability to change flights depends largely on the ticket class, with some tickets allowing changes for free and others imposing fees or prohibiting changes altogether. Travelers are advised to check for available seats upon arrival at the airport and to approach the transfer desk if their luggage is already checked through. Some respondents shared personal experiences of successfully changing their flights.