Yes, there are multiple flights from Thailand to Fortaleza for under ฿ 47,832. The cheapest flight booked recently is on เอธิโอเปียแอร์ for just ฿ 47,623, but on average you can expect to pay ฿ 71,300.
There are no direct flights from Thailand to Fortaleza, but Cheapflights can provide you with all the information you need to find the fastest route with the fewest stops.
เอธิโอเปียแอร์ and KLM can get you from Thailand to Fortaleza in just under 33h 40m. Your travel time can differ by up to 5h 45m. Both multi-stop and direct flights can be found to your destination and back.
Flying on เอธิโอเปียแอร์ is currently your cheapest option to Fortaleza, with prices starting at ฿ 47,623. Another option worth looking into is KLM, starting at ฿ 84,753 return.