Small jets cross the ocean all the time, so it wouldn't be unusual. A Gulstream V or 500 could make the trip from northern Africa or western Saudi Arabia and reach New York or Washington D.C.
It can also fly out of a small, general aviation airport where security is not as tight as the big airports.
My assumption of the use of a less expensive aircraft ie: Cessna 180 (granted, short range)was based on the fact, hopefully not, that a suitcase TacNuc was to be delivered.
I personally believe that a suitcase TacNuc will be used
for an attack on the US. I understand that a few of these devices are loose out there after the USSR Armed Forces folded up. I understand that the missing ones were stored
in the different "stans" surrounding Mother Russia.
We are living in interesting times!
Would a small gen. av. jet have a high enough service ceiling to get the EMP effect? Seems to me you have to be aways up there to get any kind of decent footprint.