The busiest times for Gatwick to Southampton are weekday rush hours, when the M23 and M25 carry commuter traffic alongside airport and local journeys. If you are travelling before 8am or after 5pm on a weekday, it pays to leave a little earlier; evenings, weekends and school holidays tend to move more freely. We plan the timing either way, so the fixed fare and the pickup time both hold.
Nothing about the pickup is left to chance: the meeting point is agreed in advance, and on airport legs we track the flight so the timing matches your real arrival, not the timetable. Plan for the usual airport process around the journey itself — security and check-in outbound, passport control and baggage inbound — which is exactly what the free waiting allowance in your fare is there for.
Telling us your group size and luggage at booking, rather than leaving it to the day, means the right vehicle is waiting: a saloon for up to four people and two large cases, or an estate, MPV or 8-seater for more bags, buggies or equipment. Journeys like this get busier in school holidays and summer, so booking ahead is the simplest way to secure the size of car you need.