holy mekkah and madina
jeddah
The biggest airport in Saudi Arabia (number of flights) is at Jeddah (JED). Then you have the airports in Riyadh (RUH) and Dammam (DMM).
The biggest seaport in Saudi Arabia is the King Abdulaziz Seaport, located in the city of Dammam. It is a major hub for trade and cargo shipments in the region.
Saudi Arabia.
JEDDAH
Jeddah
Saudi Arabia
King Fahd International Airport in Riyadh, Saudi ArabiaKing Fahd International in Saudi Arabia is the world's biggest airport. - Denver International is second.
Islam
KUWAIT
King Abdullah of Saudi Arabia
Of the countries listed, Saudi Arabia is by far the biggest. However, it is worth noting that you listed five countries, not six.