Dropping someone off at a UK airport can cost around £6.51 on average, but...

https://www.normalbookmarks.win/heading-to-the-airport-soon-dropping-off-can-cost-you-an-average-of-6-51-but

Dropping someone off at a UK airport can cost around £6.51 on average, but places like Gatwick can hit £10, and Heathrow around £7. We’ll break down how these fees compare to parking, including free windows at Long Stay and Park & Ride lots