Cheap Sixt Car Hire Deals at Chicago Union Station, Chicago

When renting a car, understand the fuel policy. A 'Full-to-Full' policy means you return the car with a full tank, while 'Same-to-Same' means you return it with the same level of fuel. Full-to-Full is often more cost-effective.

Research fuel prices in the area where you'll return the vehicle. Filling up at a local station may be cheaper than paying for fuel through the rental company, especially if they charge higher rates.

If you plan to share driving, check if the rental company allows a second driver and whether there are additional fees. Some companies offer free second driver options under certain conditions.

Some rental agreements come with mileage limits, while others offer unlimited mileage. Make sure to review the mileage policy to avoid unexpected fees.

If you plan to park at the station, check out the parking options and fees ahead of time for convenience.

If you don’t find what you need at Chicago Union Station with Sixt, you might discover more car hire options in Chicago, which can occasionally be cheaper. However, keep in mind that the additional cost of transferring from Airport to Chicago might result in higher overall expenses compared to picking up your rental car directly at the airport.

If you're traveling with pets, confirm the rental company's pet policy before booking. Some companies allow pets but may have specific fees or restrictions, so it’s best to clarify in advance.

To save on refueling costs when departing from Chicago Union Station, look for deals with a 'full to full' tank fuel policy, or even better, a free tank fuel policy, as opposed to a 'half-full to full' one.