Thanks for your reply, Mathews [:)].
When I say "package deal," I mean a fixed price that includes flight tickets, airport-to-hotel transfers, and everything included at the hotel. It’s really popular here for Southern destinations like the Dominican Republic, Mexico, Cuba... The packages are the same price no matter which agency you buy them from, or even if you book directly online. The only difference is that by going through an agency, you pay an extra $40 service fee, but the agency handles the bookings for you, answers all your questions, checks details if needed, etc. And if there’s a problem during the trip, you contact them, and they’ll help you out...
This time, we used a new agency to book our flight tickets and hotels in Portugal. Air Transat charged us an amount for the flight tickets, which should normally cover all taxes, but our agent claims she had to pay the airport tax on top of that and is charging us a large amount that seems really suspicious. Also, I was wondering if it’s common for agencies to bill this tax separately...