Look for a flight simulator that works well on an old notebook without a special graphics card. Best for free.
I'm also happy to receive tips on browser games with airplanes.
Everything without warplanes though.
FlightGear: http://wiki.flightgear.org/Laptops_known_to_run_FlightGear
You can rather forget… MS Flight Simulator is the only one that is good, at least if you want to have fun and you need more power…