Tefillat Haderech
Question
Answer
Shalom!
Thank you for your question.
As you know, Tefillat Haderech is recited for any long distance journey outside of the city. It does not matter whether the trip is by foot, planes, train, or automobile. Our sages instituted this prayer because every trip involves a certain degree of danger that one does not exist when following one’s daily routine. Neglecting to recite Tefillat Haderech when required is like neglected to wash ones hands before eating bread or neglecting to hear the Megilla reading on Purim!
Long distance, in this context, is “one parsa” outside of city limits. This is approximately 4.6 kilometers. One who travels less than this distance may still recite Tefillat Haderech, but the concluding blessing is omitted. Indeed, one should do this even when travelling less than a parsa if the journey is dangerous. Sefardim only recite Tefillat Haderech if the journey is 72 minutes or longer. Distance does not matter.
One should not recite Tefillat Haderech while in the city. Rather, it is recited immediately upon leaving the city limits, preferably within the first parsah after leaving the city. One who recited it within the city has discharged his obligation and should not recite it again.
Women and children should also recite Tefillat Haderech when going on a trip. It is preferable for every person to say Tefillat Haderech themselves. This is true even when travelling in a group, on a bus, and the like. One who is unable to recite it on his or her own may listen to another person’s recitation and answer “amen.”
Source
OC 110:7; Taz, OC 110:6; Mishna Berura 110:29,30,31; Aruch Hashulchan, OC 110:11