Looking at the horoscope of your Son, Yes there is a strong period of his travel overseas later in the year. His 4th house lord Venus is in the 8th and debilitated, Yes certainly he has a strong change of settlement overseas. However as he is running the period of Sadesatti , he can have obstacles and delays in achieving his goals. Doing the remedies below will truly help him in the period ahead.
1. Visit Shani Temple every Saturdays.
2. Recite Mantra OM Praam Preem Praum Sah Shanishraye Namaha 108 times daily.