Google flights: a very useful tool
It is a well designed and very useful tool to compare airfares and get the best deals out there. It allows you to compare prices on different travel dates and also to different destinations.
Choose your departure and arrival cities (example Montreal and Cancún), one-way or round trip and randomly choose a departure date. Select the graphic display in the right upper corner to get all prices in a 2 months time line, each blue column representing a different day and a flight price.
You can also use the map display Continue reading