Peace be upon you. If a person travels after noon, they remain fasting. However, if they travel before noon and had the intention to travel the night before, their fast is invalidated. If they intended to travel during the day, it is recommended that they continue fasting and make up the fast after Ramadan. According to Ayatollah Khamenei, if someone travels before noon, they are allowed to break their fast, and it is obligatory to do so, especially if they intended to travel the night before. If they travel after noon, they may complete their fast, and it is obligatory to do so, particularly if they did not intend to travel the night before. May you be successful in all good deeds.