Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Chiang Mai to Mombasa as you normally would.
Chiang Mai
Mombasa Moi Intl
2 stops
20h 45mMombasa Moi Intl
Chiang Mai
2 stops
21h 25mMultiple Airlines
Chiang Mai
Mombasa Moi Intl
2 stops
20h 45mMombasa Moi Intl
Chiang Mai
2 stops
21h 25mMultiple Airlines
Yes, there are multiple flights from Chiang Mai to Mombasa for under ฿53,900. The cheapest flight booked recently is on Multiple Airlines for just ฿53,862, but on average you can expect to pay ฿53,862.