This is true if you are traveling from your hometown to another city. If this is the case, you can shorten prayers and combine them at the time of Thuhur or Asr up to your convenient.

Sheikh, I wanted to ask you I travel 3 or 4 times a week to another city. I heard you can pray duhr and asr together. Is this aloud to pray?

Prayer | March 26, 2014 4:09 pm
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While praying 4 Sunnat in Zuhr, I pray all the four sunnat togethr but one of my friends breaks the four sunnat i.e. two first and salam and the the other two. Which method is correct?
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I want to ask if there is difference in time then how to offer the later prayer, I prayed isha then I had to fly and there is a time difference so how will I offer prayer there on the board as when I reach the destination there is already sun rise?