Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Bangkok to Botswana as you normally would.
Due to the rapidly changing circumstances due to COVID-19, airlines like กาตาร์แอร์เวย์ flying from Bangkok to Botswana have implemented new flexible change policies.
Yes, there are multiple flights from Bangkok to Botswana for under ฿43,000. The cheapest flight booked recently is on กาตาร์แอร์เวย์ for just ฿42,984, but on average you can expect to pay ฿44,663.
The cheapest flight price from Bangkok to Botswana is ฿20,788. On average you can expect to pay ฿68,305. The most popular route, (Bangkok Suvarnabhumi - Gaborone Sir Seretse Khama), can usually be booked for ฿43,420.