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

https://blogfreely.net/rothesqlmw/why-does-parking-beat-taxis-more-on-short-trips

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