Is it possible to pay an overstay fee at the airport and still fly domestically in Thailand?

The user inquired about the possibility of paying an overstay fee at the airport after their 30-day visa on arrival expired on January 16, while their flight back is scheduled for January 22. A response clarifies that the user can indeed pay the overstay fine at the airport (3000 baht for 6 days) or opt for a 30-day extension at an immigration office for 1900 baht plus a 1000 baht fine for the 2-day overstay. Additionally, it was noted that flying domestically within Thailand is generally allowed even with an overstay, as the airline mainly checks for identification.