Confirmed feature
The current Roblox description explicitly says the airport earns while you are offline. The exact cap, time window, and calculation are not in the public information checked here.
The current game description says your airport earns while you are offline. Here is how to plan around that promise without inventing a cap or rate.
Follow the Airport Tycoon description and the visible in-game prompt first, then use the cash planner when a personal estimate is useful.
The current Roblox description explicitly says the airport earns while you are offline. The exact cap, time window, and calculation are not in the public information checked here.
Write down your current cash, your visible next goal, and the time you plan to be away. When you return, record the observed result instead of assuming the planner knows the rate.
The Cash Target Planner can calculate the rate you would need to reach a goal in a number of offline hours. It does not claim that Airport Tycoon pays that rate.
Offline earnings are confirmed, but the cap and formula are not. Leave a clear airport goal, record your before/after cash, and treat all offline-rate math as a personal scenario.
Use the checklist in order when you want a direct path instead of broad tips.
Leave the airport in a state where a new passenger/build change can be recognized.
Save cash, goal, friend count, and any Premium/Plus assumption outside the site.
Use the calculator to show the required rate, not a promised rate.
Use the observed result to update your own next estimate and send a correction if public details have changed.
Use these checks when the guide route is not working in your current session.
That is a reason to record the session conditions, not to publish a new universal cap.
Check the live game UI and official group/update notices; the site only records publicly supported behavior.
Ask for a current-place source and checked date before treating it as current.
Slow down before spending Airport Cash or treating a public claim as a current-game rule.
No current public formula was found.
A friend/Premium state can change the observed comparison; note it as an input.
Old Airport Tycoon pages are about a different place and economy.
The current game description says your airport earns while you are offline.
No current-game cap was found in the public information checked here, so the site does not claim a number.
It can show the rate needed for a scenario from your inputs, but it does not claim that rate is an official game payout.
Record current cash, target, goal, session conditions, and the expected return window so your own comparison is useful.
Open the next page that matches what you are trying to do in-game.