Heathrow Airport is about 65 miles (105 KM) from Southampton cruise port.
The cheapest option is to travel by the national express coach. Then you need a taxi from the Southampton bus station to the cruise port.
Other option is Southampton cruise bus shuttle, which will pick you up from hotels in Heathrow, unfortunately it doesn't pick up from passenger terminals.
There is also a train connection, but it does not have a direct connection, hence you have to use the RailAir shuttle to connect with the train service at Wapping, which is about 15 mile away from Heathrow airport..
Another option is to hire Private hire vehicles, which can pick you from passenger terminals and drop you off at the port hassle free.
About 70 miles
By the title of the airport, London Heathrow Airport, it serves London and south-east England.
Manchester has one airport south of the city.
There are two, Gatwick and Heathrow
95 miles taking this route:Take A1 to the SOUTH from Peterborough to M25 towards HEATHROW (airport).Take M25 to Heathrow.
85 miles taking this route:Follow signs out of the airport to M25; once you get to M25, follow signs to M25 HEATHROW (to M3).Once you are on M25, take M25, around London, to M3 to SOUTHAMPTON at J12.Take M3 to Southampton.
Southall is a suburb in west London, near Heathrow Airport.
The flight distance from London Heathrow Airport to Johannesburg, South Africa is 5,621 miles / 9,046 km.
Hounslow which is in West LondonAns2 - About 5 miles west of the centre of London
Heathrow Airport is located about 20 miles west of central London and Gatwick Airport is located about 30 miles south of central London. Both airports have excellent transport connections to central London.
The closest airport to Southampton [all one word] is Eastleigh Airport. It is not an international airport. You don't saym where you will flym from but assuming you are coming from USA you will need to fly into Heathrow and take the train down to Southampton.
Not directly, you will need to take the South West trains service to London Waterloo and then you need to take the Bakerloo line tube to Piccadilly Circus, and then you can take the Piccadilly Line all the way to Heathrow Airport.