Ease of transfer (one pilot vs multiple for a looooong flight, probably no refuel on the Antonow, and if so it eats less specialised stuff than the F-16s) and maybe even fuel efficiency, I would guess.
Also, one cargo plane raises less eye brows than a flock of fighters.
The maximum range for the F16 in "ferry" mode (max fuel, no weapons, pee before takeoff) is something like 4000km. The distance from Belfast (Maine) to Belfast (the original) is 4500km.
That would mean air to air refueling, which is expensive and risky. It would put major wear on the planes, which are not the newest to start with. And unlike the Antonov, the F16 comes with neither legroom nor bathrooms.
Iirc the factor that limited early nuclear submarines the most from continuous dives was the toilets, they have limited storage for sewage and it turns out that draining those with a greater outside pressure is a pretty difficult task, at least if you want to stay undetected.
Now that they have figured that out the limiting factor is food.
Oh hell yeah, are we pulling some stuff out of AMARG? I didn’t realize we were doing that!! Thought it was just a handful of European countries donating airframes they were decommissioning.
Has tons of mothballed airframes that technically serve as a strategic reserve in the event that we suddenly need a few hundred more military aircraft for some reason.
I had to look it up as well “The 309th Aerospace Maintenance and Regeneration Group (309 AMARG) is a one-of-a-kind specialized facility within the Air Force Materiel Command structure.“