Is Shortening Prayers while Travelling Sunnah?

Wife’s Prayers When Visiting Husband Living in Another State

Can he shorten his prayers and eat before leaving his house on a journey?

Should a traveller offer the prayers in shortened form in his house or pray in congregation in the mosque?

The distance at which it is prescribed to shorten one’s prayers and join them

They are travelling to a European country and there are 15 of them; should they pray Jumu ‘ah?

They camp in al-Sharaa’i’ during Hajj and are asking about joining and shortening prayers and Jumu’ah prayer

He is travelling and the time for Jumu’ah has come; should he pray it as Zuhr and shorten it and join it to ‘Asr?

‘Asr and the traveller

A traveller wants to join two prayers but he thinks it most likely that he will reach his city before the end of the time for the second one