This picture was taken from a wall that separates the beach from the airport. As you can see, planes fly almost over you. You can even see the faces of the passengers through the windows of the plane!
Although Montego Bay's airport is as close to the town as it can get, noise is not a problem. Thanks to its location by the sea, you do not hear the annoying planes' noise. Not even if you stay in a hotel by the airport.
By the way, the ride from the airport to your hotel can be the most expensive taxi ride you will take in your entire life. Some hotels are just a few hundred yards from the airport, but taxi drivers always charge the airport ride, which is several US dollars. If you do not want to pay, and if you are staying close enough, you can walk to the airport. Weird, isn't it?