From AC you have no choice but to overnight.
Even if you fly to new Cayo airport, you still need to get transpo to border, take bus or taxi from there.
PACZ tours in San Ignacio will pick you up in BZ city or Cayo, take you across border in a timely fashion.
Landline: (501) 824-0536
Cellphone: (501) 604-6921
(after 8:00 P.M.)
Email: [email protected]