The Legacys, which he may also be typed on, can easily do transcons/TATLs out to 3000+ nm. Here's 8 hours against the wind in one.

But even the airliner 145XR (E45X) can do 2000 nm (standard mission rules) at MTOW. So that's a transcon (SAN-JAX is 1800 nm) with maybe 5t payload.

Let's see if I can find any in the database...

edit: N138DE, a 145LR, is a fan of long flights:
1554 nm direct, 1614 nm flown
1554 nm direct, 1624 nm flown
1675 nm direct, 1677 nm flown