Thai Lion Air EU261 flight delay compensation regulation
In case you booked Thai Lion Air flight that departed from Europe, you may have rights under European EU261 law in case your Thai Lion Air flight is not on time or cancelled.

If your Thai Lion Air flight was delayed causing you to arrive later than 3 hours after the original arrival time, then it is your legal right under EU261 regulation to receive compensation from Thai Lion Air.
What to do if Thai Lion Air flight was delayed?
Know your rights as Thai Lion Air passenger. If your Thai Lion Air flight was delayed causing you to arrive later than 3 hours after the original arrival time, then it is your legal right under EU261 regulation to receive compensation from Thai Lion Air. The EU261 compensation can be up to €600 per passenger in the form of cash, electronic bank transfer, cheque or travel vouchers.