Unlimited mileage in car rental refers to a type of mileage policy. It means the renter may drive as many miles or kilometres as they wish without paying any additional charges. Restrictions on where the vehicle may be driven can still apply to these rentals.

Example sentence(s):
- Unlimited mileage applies only in the state where you picked up the rental vehicle and the neighbouring states.
- Unlimited mileage within your country of rental, mileage charges may apply for cross-bordering.