Yes, there are multiple flights from Thailand to Monterrey for under ฿ 51,032. The cheapest flight booked recently is on United Airlines for just ฿ 50,102, but on average you can expect to pay ฿ 92,278.
There are no direct flights from Thailand to Monterrey, but Cheapflights can provide you with all the information you need to find the fastest route with the fewest stops.
There are many flights that can get you from Thailand to Monterrey in 28h 42m. Fly via United Airlines or KLM to get the fastest option. This flight may include one or multiple stops.
United Airlines, at ฿ 50,102, was found to be the cheapest airline from Thailand to Monterrey. An alternate airline flying to your destination would be KLM.