Giorgio B.

1. You will typically pay a higher fare compared to booking directly with the airline. While Flight Hub advertise "stellar" prices "only for you" (sound familiar?), you can easily find a better price booking directly with the airline. Flight Hub is a travel agent and operates on a profit.
2. You can often find more options for that airline when you book directly.
3. By purchasing through Flight Hub, you enter a contract with Flight Hub, NOT with the airline. Always check the fine print. There are terms that may be different from the consumer guidelines under which airlines operate. For instance, many airlines offer a 100% refund (no questions asked) should you change your mind within 24 hours of booking. Curiously, Flight Hub does NOT extend this to its customers. You may be quite surprised (as I was) at details of the terms with Flight Hub.
4. As with (3) above, should you run into any issues with a flight (such as a change request), the airline provides direct support to customers who have booked directly with the airline. You will need to contact Flight Hub for any changes to fares booked through them. You will pay a "special" Flight Hub fee on top of the standard airline change fee to make changes to your fare. I requested a change only in the outbound leg due to a death in the family. The airline change fee (along with the difference in fares) would have been reasonable, but with the addition of the "special" Flight Hub fee, the change was cost prohibitive. I made three separate calls to Flight Hub and spoke to different agents who, although polite, explained that their manager was unavailable. Because of that "special fee" (in my case $250 for 2 fares), it was less expensive to re-book the ENTIRE trip directly with the airline, and I had to forfeit the value of the original booking with Flight Hub.
5. You may be inundated with an incessant stream of spam directly (and indirectly through Adware and other spyware) offering "discounted fares exclusively for you" for weeks or months following your booking.
For further evidence, check out their Better Business Bureau rating (F) in this link:
https://www.bbb.org/ottawa/business-reviews/online-travel-agency/flighthub-in-cornwall-on-*******