Good capture, especially for a camera in that class. Digital point and shoot cameras are notorious for being extremely slow to respond, making accurate composition of fast moving subjects next to impossible.
A tad more light would have been better probably, letting the white aircraft appear white instead of grey.
Given your camera, a tighter crop would likely have been impossible (don't know its capabilities in that regard), at the moment the aircraft look a bit lost (but not so much as to make them disappear).
Overall a good image taken using limited means, maybe an incentive to go hunting for a DSLR with some long teles if you do this work regularly.
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{K:25317} 2/12/2006