It sounds impossible to buy a ticket to the wrong destination, right? You’d never mistake York, England for New York State. But would you notice an airline issuing a plane ticket for Grenada instead of Granada, like British Airways once did? Or the 1,500-mile difference between airline codes SJO and SJU? Believe it or not, these things do happen, and these commonly confused destinations should make you check your boarding pass.

It sounds impossible to buy a ticket to the wrong destination, right? You’d never mistake York, England for New York State. But would you notice an airline issuing a plane ticket for Grenada instead of Granada, like British Airways once did? Or the 1,500-mile difference between airline codes SJO and SJU? Believe it or not, these things do happen, and these commonly confused destinations should make you check your boarding pass.