I had some Montana SPX speakers shipped from CA to NY via airfreight. They were housed in the original wood crates (2" x 3" bracing with 1/2" partical board covering). The speakers were cushioned with packing material on all sides and set firmly in the container (fastened by screws). Aside from the cost of shipping it was a trouble free trip.
You should look into the damage policy of the airline you choose and maybe some form of insurance.
You should look into the damage policy of the airline you choose and maybe some form of insurance.