This isn't CO-specific, though it would be nice is CO's eService Online provided functionality based on it...

Does anyone know of a list or database that lists all of the major airports and then the distances to other nearby airports? Some travel websites currently provide the opportunity to choose nearby airports in a search, but I'm just looking for a raw list for all airports. For instance, it might say that SAT is near AUS. Or that HOU is 31 miles from IAH and 11 miles from EFD. That kind of stuff.

Thanks for any info or pointers!