I don’t know much about GPS jamming, but I know a fair bit about how airliners navigate. GPS is usually not used for final approach, which is typically either visual or ILS (a radio signal transmitted from the ground). This in contrast to the earlier stages of approach which may use GPS depending on the airport and the specific approach in use. If you can keep the jamming signal contained to the immediate airport vicinity and a few thousand feet above, there should be little or no impact on (non-drone) aircraft navigation.