HOLIDAYMAKERS have been urged to avoid an easy mistake that could cost them over £100 extra - and it takes just minutes to sort. Parking at the airport is a must-have for many travellers, especially those travelling with kids or elderly relatives. 1 Leaving booking your parking until the last minute could double your costs But new research shows airport parking is surging in price - and leaving booking it until the last minute can make the costs even higher.

Last August, parking at Bristol Airport typically cost £19.06 a day, while this August it will cost around £24.69 a day.

And at London Luton airport, costs are set to jump from £16.02 a day last August to £20.28 a day this summer, according to the research by Airport Parking Shop, conducted exclusively for The Sun.

So, there's never been a better time to save money on your parking where possible. Yet, around one in ten travellers leave booking airport parking until the day before they go on holiday - and our research shows doing this could double the cost. Airport Parking Shop found that booking parking at the last minute adds over £100 to the price compared with booking two weeks earlier at several major airports around the UK.

Booking parking on-site at London Gatwick airport two weeks before flying in August last year cost £138.74 for seven days. But if you had left booking the parking until the day before flying, the same number of days would cost £276.

64 - almost twice as much. Most read in Money LEXI'S BATTL.