It all depends on your setup. I have 3S 850 packs I fly on my mini pushers that last 10 minutes. Then I have 1300-2100 3S that I use on my large pushers that only last 5 minutes.
And don't forget, the larger the mAh of the battery, the heavier it will weigh. A lot of times you compromise performance for endurance using a larger mAh pack. And also it could affect your CG, so you have to be careful there.