I am going to visit Thailand as a tourist. I arrive on August 19 in Bangkok, and leave on September 20, which makes my trip last for 32 days. I am leaving at 02:05 am, though, so I could check-in at the airport before noon on the 19th, making my time in Thailand 31 days.
From information I've found, a tourist Visa on Arrival may be obtained for a maximum of 30 days, when coming by plane, which applies to me. I also heard about the possibility to extend this visa, at the Bangkok Immigration Centre, for another 7 days, which would be sufficient for me.
Will I be able to get a Visa on Arrival at the airport, if my returning tickets are later than 30 days from arrival? If so, how much does it cost to extend this visa for another 7 days, or at least 1-2 days? Is overstaying 1 day and paying a fee an option?
If I will not be able to get VoA at the airport, would it be okay if I bought tickets to another country (for example, tickets to Laos on 2 September, spend a week or two there, and then go back to Thailand to catch my flight on 20 Sept? This way I would be in Thailand twice, each time for two weeks, and I could get two visas. Is it legal?
My nationality is Polish.