found this for air canada vacations:
AIR ONLY:
Goods and service tax (GST) applicable only on flights to the Continental United States, and foreign country departure/airport tax if applicable.
PACKAGES:
Air-only taxes listed above plus hotel service charges, baggage handling, maid service, government hotel tax, energy surcharges, passenger handling fees and Tourist Card (if applicable). Note: Cuba, Dominican Republic and Costa Rica Departure Taxes must be paid locally, in cash only: approx. 25 Cuban Convertible Pesos per person (Cuba), approx. $20 US per person (Dominican Republic) and approx. $26 US per person (Costa Rica).