Tip for Driver?

[Wall-e]

I will be hiring a towncar service to take us to the airport. It is about a 25 mile trip, and the fee will be $57. What would a reasonable tip amount be?

Thanks!

[Seasonscraps]

15% I believe is standard which is ~$8.50 but I would probably round it up to $10.

[DisneyFr33k]

We tipped 20%. Our drivers were really good though. Our van we ordered ended up being a stretch limo! Great substitution for us and a wonderful way to drive to the airport!!