<< As CUN has no airside transfer facility...>>
Cancun's "A" terminal does allow for comfortable transfer among international flights, just as IB
will need. What's more, since the transferred pax won't be "entering" the country, there will be no need to leave the floor to clear neither immigration nor customs. They can exit the A340 and walk straight accross the hall to the A319 and vice-versa.
(The foregoing, provided there are available slots, as CUN
's traffic has grown amazingly in the last years)
A300/18/19/20/21 B721/2 B732/3/G/8 B741/2/4 B752 B762/3/4 B772/3 DC8/9/10 MD11 TU134/154 IL62/86 An24 SA340/2000 E45/90