Shortening prayer during a journey
Ibn al-Mundhir and others have transmitted an Ijmaa that there is no shortening of the morning [fajr] prayer nor the maghrib prayer.
al-Nawawi said: The majority have said that one is allowed to shorten the prayer in every permissible journey.
Some of the Salaf said that fear during travel is a condition for shortening the prayer.
Some said that shortening the prayer is only allowed if one is traveling for Hajj, Umrah, or Jihaad.
Abu Hanifah and al-Thawri have said one can shorten prayer in every journey whether the journey is one of obedience or disobedience.
Reference(s):
شرح سنن النسائي المسمى ذخيرة العقبى في شرح المجتبى
Volume 16 Page 328