No they can't, royal members must travel separately in case of a bad accident.
No the cant
President & Vice.
The Vice President and the President will never travel together., in case of an accident where both parties could be killed or severely injured.
No Prince Charles and Prince William can not travel on the same plain. This is in case one of their plains has a mishap, the Royal family would still have one of them as heir. The only time they flew together was on a trip to Australia when William was an infant.
President and Vice President
The President of the United States and the Vice President of the United States are not allowed to travel together on the same mode of transportation for security reasons. This is to ensure continuity of government in case of any unforeseen event or emergency.
It allowed Americans to travel from coast to coast.
You are usually allowed to travel with $800 in cash in Barbados.
Is it allowed to travel around the world with the world passport?
Wolves do travel together in packs.
Some reptiles travel together.
William had to travel for 18 KM, (18 minutes) in a march with his army.