When does a traveler shorten and combine prayers if his departure airport is 200 kilometers away from his city, or if he travels to an area 100 kilometers within the same large city? And is he considered to have passed the buildings simply by seeing a sign for another city? And is he obligated to pray in congregation at the airport if he finds a nearby mosque and fears delay? And does he shorten prayers upon arriving in a country where he will stay for half a day, or upon arriving in a city where an airport will be his new place of residence?

The travel distance that permits shortening prayers (qasr) and breaking the fast (iftar) is approximately 83 kilometers. A traveler is not allowed to avail themselves of travel concessions until they have passed all the buildings of their village. Seeing signposts for other cities is not considered passing the buildings. If the prayer time begins before passing the buildings, it is permissible to shorten the prayer after passing them. There is no obligation to exit the airport to pray in a mosque outside it, as congregational prayer in a mosque is not an individual obligation according to the majority of scholars, and one can pray individually inside the airport if no congregation is available. Staying for half a day does not nullify the ruling of travel, and shortening prayers is permissible. It is not permissible to shorten a prayer whose time began during travel if it was not prayed until reaching a town where one intends to reside for four days or more.