Thank you, MisterNice, for the helpful information. I had waited too long to purchase a ticket for the FAQ, EWR-YUL, and the prices went from 200 to 407 dollars. Yikes! Was planning to use a voucher. So, remembering the cheaptickets.com recommendation, I booked a ticket for 180 dollars RT at 8:01 pm on July 3rd. Good thing they were still available. I received the ticket on July 6th.
I thought this was extremely fast, considering July 4th was a holiday. So, after the trip, and if I don't have any problems with the ticket, I'll certainly consider using them again.
Linda