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

https://highstylife.com/how-do-i-compare-taxi-both-ways-vs-parking-without-guessing/

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