My basic procedure for starting any airport:
- Spend initial money getting Bus/Cleaning/Baggage to at least lvl 3.
- S Grind
- The first time you are missing a Bus or Baggage unit, buy one more. Once you have 2 of each, build 1 more S stand.
- Upgrade Bus/Cleaning/Baggage to lvl 5 (at IAD, SAN and MCT you can get away with lvl 3-4) and Fuel to 2.
- M Startup
- Once you have W10k buy Advanced Handling and the first M stand (Z8, at IAD).
- The first 2-3 times you clear in an M plane, delay the following arrival a minute or two so you don’t run out of services.
- Buy a second Fuel unit.
- Upgrade Catering to lvl 3.
- Build an M stand (R13, at IAD) when you have W6000.
- Upgrade Water/Sanitation to lvl 2.
- M Grind
- Work on maxing primary services (Bus/Cleaning/Catering/Baggage) and Fuel. Try to keep about W1500 on hand at all times so you can buy primary services when you are short. Only buy Fuel/Water/Sanitation if you notice these are the final services to finish on a plane.
- Build another M stand any time you have $5k. (On IAD, build the R stands in descending order.) Don’t build S/M on any stands that can take L/X planes (except MCT, you can do anything you want there).
- L/X
- Once you have Bus/Cleaning 5, Catering 4 and about $10k, build your first L stand.
- Upgrade Cargo
- Player Planes
- Don’t buy planes until you’ve maxed all your services and built at least one L and one X stand.
- Use whatever plane you receive as a level award to fly to the closest unlocked destination (at IAD that’s a CRJ7 to PHI–or to EWR if you don’t play as often, but don’t go farther than that or you’ll hit Maintenance A too early). Take a break until the plane comes back, then send it out again and again.