The cost of BYU Tri Meet: BYU Cougars vs. Southern Utah Thunderbirds & UC Davis Aggies 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 BYU Tri Meet: BYU Cougars vs. Southern Utah Thunderbirds & UC Davis Aggies tickets.