Do I need an onward ticket when flying to Thailand with Lufthansa or Austrian Airlines on a one-way ticket?

When flying to Thailand with Lufthansa Group (Lufthansa or Austrian), experiences vary regarding the necessity of an onward ticket. Some travelers mention that if your return ticket is more than 60 days out or if you only have a one-way ticket, airlines might ask for a visa or onward travel documentation. However, others report that they have never been asked for either documentation, despite flying multiple times with these airlines. Additionally, certain visa types, like the DTV, may exempt travelers from needing an onward ticket.