Q: Is a Musafir (traveller) absolved of having to perform the Sunnan Salaah?
A: It is narrated by Ummi Habiba Radiyallahu Anha that Nabi Sallallahu Alaihi Wasallam said: "Whoever reads 12 Rakaats Sunnan every day, a house will be built for that person in Jannah." [Nasa’i] One should therefore, not unduly missing the Sunnan Salaah.
If a Musafir is on the move or fear that his companions may leave him behind, then he may suffice with the Fardh Salaah. On the other hand, if he is stationed at one place or has time at hand, it is best that he read the Sunnah Salaah, especially the Sunnah Muakkadah (emphasised Sunnah).