Answered by Ustadh Tabraze Azam
Question: Under which circumstances is it permissible in the Hanafi school to pray sitting down? Can one pray sitting down when one is traveling in a vehicle?
Answer: Assalamu alaikum wa rahmatullah,
I pray that you are well, insha’Allah.
It is permitted to pray voluntary (nafl) prayers whilst sitting in your seat [of a vehicle] if you are outside the city limits. [Shurunbulali, Maraqi al-Falah]
As for obligatory prayers, it is not permitted to pray them whilst seated without genuine excuse. Please see: The Fiqh of Praying Sitting Down and: Can One Pray Sitting Down or In the Car Due to Fear of Harm?
And Allah alone gives success.
Checked & Approved by Faraz Rabbani