Here is the full list of all 35 Airport CEO achievements.
Depart 500 GA aircraft
Repair a broken aircraft
Turnaround 25 aircraft in one day
Have your first aircraft depart from an airport
Land every aircraft type in the game
Perform a turnaround including all services
Succesfully turnaround a 747
Succesfully turnaround an A380
Turnaround 75 aircraft in one day
Turnaround 200 aircraft in one day
Depart 5000 GA aircraft
Depart 1000 commercial aircraft
Depart 10000 commercial aircraft
Have an airport with more than 500 current passengers with a passenger rating above 80%
Have an airport with more than 2500 current passengers with a passenger rating above 80%
Have an airport with more than 5000 current passengers with a passenger rating above 80%
Depart 500 000 passenger via aircraft
Depart 50 000 000 passenger via aircraft
Staff happiness above 90% with a staff force of above 100
Staff happiness below 10% with a staff force of above 100
Reroute 10000 bags using tilt trays
Manually scan 750 000 bags
Manually scan 75 000 000 bags
Color a vehicle
Complete all R&D projects
Have a total rating of 95% or higher
Win the Airport of the Year Award
Fully pay back a loan
Have a net worth of $10 000 000
Have a net worth of $100 000 000
Load an airport from Steam Workshop