The cost of Ottawa Bluesfest: Green Day, The Linda Lindas & Dwayne Gretzky - Day 7 tickets can vary depending on many factors. The costs can be affected by where you buy them, when you buy them, the popularity of the specific venue and also where in the venue that you are looking for Ottawa Bluesfest: Green Day, The Linda Lindas & Dwayne Gretzky - Day 7 tickets.