SHAFAQNA – The Grand Ayatollah Fayyaz answered a question about fasting and travelling.
Question: A person travels to a place before noon, and returns on the same day before noon, what is the ruling about his/her fasting? Must this person fast or do Iftar?
The Grand Ayatollah Fayyaz: If has not eaten whilst travelling, and returns to his/her town, must intend (Niyyah) to fast.
Source: PERSIAN SHAFAQNA