0nd8dfn7rd7h - loads of money!
When ever you can try to pack all of the slots in your plane for deliveries. The result is a fat bonus.
Save up for important items that yield exponentially greater rewards, and instead purchase a few affordable and reasonable smaller items to get your business off the ground.
Instead of buying a complete plane, buy the individual parts and save your own to save as much as half the price.
Keep an close eye on your planes when they're in the air there will be coins and bux drift that you can tap on them to collect them.
A good starting purchase to help stir up jobs is to buy another airport.
Choose a location that is nearby to begin with; although farther airports can give you more gold for a delivery, their distance combined with your slow starter planes will give you a much lower balance of gold earned per hour of travel.