Source: The Great Interpretation of Dreams (Ibn Sirin)
Travel in a dream indicates revealing people's characters. If one travels returning, he repents from his sins. If he travels to a better place, his condition improves. If he travels to a worse place, his condition worsens. For the sick, travel indicates death.
Source: Perfuming Humanity in the Expression of Dreams (Al-Nabulsi)
Travel indicates moving from one state to another. For the rich, it is poverty, and for the poor, it is wealth (one of the opposites). Returning from travel indicates fulfilling rights and repentance.
Source: Signs in the Science of Expressions (Ibn Shaheen)
Travel is interpreted as a change in condition. If the travel is to a known place, he will attain goodness. If it is to an unknown place, it is worry or death.