All the characters belong to Eoin Colfer, the plan belongs to Artemis.
Flight Plan
The course data logged for the Fowl's jet showed a transatlantic flight to Bermuda. Artemis sat in the co-pilot's seat and watched Holly effortlessly put the Lear through its paces.
"This is fun, Artemis - a bit primitive – but fun. Thanks."
He smiled warmly at her, "Well, it's the least I could do on your birthday. Now, could I have your attention, Captain?"
Holly looked Artemis straight in the eye, "OK, Mud Man, I'm all yours."
"In that case, we have reached a cruising height of exactly 5280 feet, I think it's time I showed you how to engage the auto-pilot."
The height is significant.