Easily done?
The US B747 that landed at BRU instead of FRA was actually a NWA DC10. The first "somethings not right" trigger should have been the early descent (200 miles early). Instead of passing KOKSY at FL330, they were descended to FL190.... still, they'd been up all night, and EUR ATC procedures can be unfamiliar to those they were used to "at home".
Anyway, lots of HF errors and lots of lessons learned (not just by the flight crew... by ATC as well!) Oh, best of all, nobody got hurt.
Back to confusing "nearby" airfields....
I seem to recall some F16s visting RAF Coltishall on an exchange visit making a perfect touch and go.... except that they were at Norwich Airport
Down in Devon Dunkeswell and nearby Upottery can easily be confused ( I speak from experience
) The difference is Dunkeswell has lots of buildings on the South side, and a road through the main rwy. By comparison Upottery looks pristine (only used for go carts now, I believe).
rgds BEX