Southampton Airport is actually in Eastleigh and about 5 miles from the Cruise Terminal. I suggest you look into the possibility of leaving the car near the Cruise Terminal. If you can't do that then get the train from the airport to Southampton Central station and a taxi from there to the terminal.
cruise parking at Southampton
one hour
7-8 miles
The Honolulu cruise port is 4 miles away from Honolulu International Airport and 15 minutes away by car.
71 miles
7-8 miles
3.3 miles 8 minutes
41.5 Miles, 48 mins. by car
It is 48 miles and takes about 50 minutes depending on traffic.
not to far, they're both in Downtown San Diego
Houston Hobby Airport (HOU) is approximately 41 miles from the Galveston Cruise Port. The drive takes about 1 hour depending on traffic conditions. It is recommended to consider transportation options such as shuttles, taxis or private car services for a more convenient transfer.
Road mileage from Southampton to Heathrow is about 75 miles but there is no easy way of doing the journey. You may have to travel to London and change for Heathrow. Travelling by bus is usually cheapest.
Orlando Sanford Airport is about 50 miles away from Port Canaveral Cruise Port. It typically takes around 45-60 minutes to travel between the two locations by car.
England base airline, Flybe, has several airports which operate as hubs. Currently, there is Manchester Airport, Birmingham Airport, Southampton Airport, Belfast City Airport and Cardiff Airport. The largest of these hubs would, by far, be Southampton Airport.