Transport to London
If you are coming from out of town, here is some info to help you find your way to Brighton. My suggestion is that you check what is the nearest busstop or trainstation is near your accommodation to find out the best and quickest route. If in doubt, contact your host for more information as to how to get to your hotel/apartment from the airport you're flying into.
From Gatwick Airport (nearest airport)
Getting into Brighton from Gatwick Airport is quick and easy. National Rail Services are available in the South Terminal and you can travel to Brighton via direct train (25 minutes).
From Heathrow Airport
From Heathrow, you could take the Underground (Piccadilli line) straight into the centre of London. From there, you can take the train to Brighton, find out train schedule. Another option is to go via National Express Coach, which has a direct connection from Heathrow to Brighton (2 hours)
From Luton Airport
From Luton Airport you can take the National Rail Services to Brighton. Visit their website for all info on your trip.
From Stansted Airport
From Stansted Airport you can take the National Rail Services to Brighton. It is rather far, however, with some change overs so not the ideal route to choose for your journey. You might find that the money you save on flight costs to fly into Stansted is not comparable to what it will cost you to travel from Stansted to Brighton, time as well as money wise.
Travelling in London
Uber is available in London and is usually the cheapest option if you wish to travel by taxi. You can download the Uber app on your smartphones and follow the guidelines.
Travelling in London by public transport is relatively quick and easy. You can either use the Underground, the bus services, The Overground or the National Rail Services to travel to your destinations. Visit the TFL website to help you with planning your journey.