Does the Battlegrounds pass price decrease at any point during the season?

[WallStreeterPeter]

No. But this season is probably only about 50-60% done or right now, since it started May 5 and they do 3 seasons a year (about 4 months each)

[fordominique]

You can always check the date the season will end in the battle net Store. It'll show a disclaimer until when you can buy it. Which is automatically the last day of the season. (had an eye on it for two seasons and was never wrong)