The cheapest car rentals in Milwaukee come from airport and off-airport locations that compete directly on price, and from booking sites that let you compare rates across companies in real time.
Milwaukee Mitchell International Airport (MKE) has five major rental companies on-site: Enterprise, Hertz, Budget, Avis, and National. Off-airport locations—particularly Enterprise and Budget branches in midtown and near the lakefront—often undercut airport prices by 15 to 30 percent because they avoid airport facility fees. The trade-off is that you pick up and return the car yourself rather than having it delivered, and you lose the convenience of walking out of baggage claim directly to your rental.
Booking sites like Kayak, Autoslash, and Priceline pull rates from all available companies at once, so you can see the lowest option without visiting each company's website. These sites also show you the total cost upfront—rental rate plus taxes, airport fees, and insurance—so you know what you are actually paying before you commit.
Key Takeaways
- Off-airport Enterprise and Budget locations in Milwaukee typically cost 15 to 30 percent less than airport counters because they do not charge facility fees.
- Booking comparison sites like Kayak and Autoslash show you every company's rate at once, including all taxes and fees, so you can spot the lowest price without visiting multiple websites.
- Declining the rental company's insurance and using your personal auto policy or credit card coverage instead can save $15 to $40 per day.
- Picking up on a weekday and returning on a weekday costs less than weekend rentals, and returning to the same location you picked up from avoids one-way fees.
How airport fees and location affect your total cost
Milwaukee Mitchell International charges a 10 percent facility fee on top of the base rental rate at all on-airport locations. A $40-per-day car becomes $44 per day before taxes. Off-airport branches do not charge this fee, so the same car costs $40. Over a week, that is a $42 difference on the rental alone, before you add state and local taxes.
The closest off-airport Enterprise locations are on North Water Street (downtown) and on South Howell Avenue (near the airport but not on airport property). Budget has branches on North Prospect Avenue and near the airport as well. Call or check their websites to confirm they have the car type you need before you drive there—smaller locations sometimes run out of economy cars during peak travel times.
If you are flying in and do not have ground transportation to an off-airport location, the airport counter is worth the extra cost for convenience. If you are renting locally or have someone to drive you, the off-airport savings are real.
What insurance costs and when you can skip it
Rental companies offer collision damage waiver (CDW) and loss damage waiver (LDW) coverage, which typically cost $12 to $25 per day. Before you buy it from the rental company, check whether your personal auto insurance or credit card already covers rental cars. Most personal policies do, and many premium credit cards (especially American Express and some Visas) cover collision and theft on rental cars worldwide.
Call your insurance company or credit card issuer before you rent and ask specifically: "Does my policy cover collision damage on a rental car in Wisconsin?" Write down the name of the person you spoke to and the date. If the answer is yes, decline the rental company's insurance and use your own coverage. If the answer is no, buy the rental company's coverage—it is cheaper than paying out of pocket for damage.
Wisconsin requires liability insurance on all vehicles, and rental companies include it in their base rate. You cannot decline it, and you should not need to buy extra.
Timing your rental to lower the daily rate
Weekday rentals in Milwaukee cost less than weekend rentals, sometimes by $10 to $20 per day. If you have flexibility, renting Monday through Thursday and returning by Friday morning saves money. Returning to the same location you picked up from also avoids one-way fees, which can add $50 to $150 depending on where you are going.
Rental rates also shift by season. Summer (June through August) and holiday weeks are peak pricing. Late fall and winter (November through February, excluding Thanksgiving and Christmas weeks) are the cheapest times to rent in Milwaukee. If you are planning a trip months in advance, booking early locks in lower rates—rental companies often honor prices booked 30 to 60 days out, even if rates rise later.
Comparing company types: national chains versus local operators
The five national companies at Mitchell Airport are Enterprise, Hertz, Budget, Avis, and National. All five have off-airport locations in Milwaukee as well. National and Avis tend to be slightly more expensive but offer better vehicle selection and newer cars. Budget and Enterprise are usually cheaper and have more locations, which makes returning the car easier if plans change.
Milwaukee does not have major local-only rental companies that compete with the nationals. Turo, a peer-to-peer car rental platform, operates in Milwaukee and sometimes offers cheaper rates for longer rentals (a week or more), but you are renting from individuals rather than companies, so policies on damage and roadside help differ. Check Turo's terms carefully if you go that route.
Hidden costs and what to watch for
The advertised daily rate is rarely the total you pay. Always check the itemized quote before you book, and confirm it includes state sales tax (5.5 percent in Wisconsin), local taxes, and any airport or facility fees. Some booking sites hide fees until the final step, so read the total cost line carefully.
Fuel charges are a common surprise. Most rentals come with a full tank and require you to return it full. If you return it empty, the rental company charges you for a fill-up at a premium rate—usually $6 to $8 per gallon. Fill up at a regular gas station within a mile of the return location before you drop off the car. Do not buy the rental company's pre-paid fuel option unless you know you will return the car on empty; most people do not, and you lose money.
Underage driver fees explore if you are under 25. Rental companies charge $15 to $30 per day extra for drivers under 25, and some companies do not rent to drivers under 21 at all. If you are in that age range, factor this into your comparison.
Booking sites and tools that show you the lowest price
Kayak, Autoslash, Priceline, and Hotwire all pull rates from multiple companies and show you the total cost upfront. Kayak and Autoslash are the most transparent—they show you the base rate, taxes, and fees separately so you understand what you are paying for. Priceline and Hotwire sometimes offer "opaque" deals where you do not know which company you are renting from until after you book, and these can be cheaper, but you lose the ability to choose.
Set up price alerts on Autoslash or Kayak if you are booking more than a week in advance. These tools monitor rates and notify you if the price drops, so you can rebook at the lower rate. Some rental companies also allow you to modify or cancel reservations for free up to 24 hours before pickup, so you have flexibility if rates fall.
Do not book through a travel agent or third-party site that charges a booking fee on top of the rental rate. The savings from a lower rate disappear when you add a $10 to $25 fee.
Frequently Asked Questions
Is it cheaper to rent from Enterprise or Budget in Milwaukee?
Both are usually cheaper than Avis or National, but rates vary by location and date. Use a booking site to compare the exact price for your dates. Off-airport Enterprise and Budget locations are typically cheaper than their airport counters, sometimes by $15 to $30 per day.
Do I have to buy insurance from the rental company?
No. Check your personal auto insurance policy and credit card benefits first—most cover rental cars. If they do, decline the rental company's insurance. If they do not, buy it from the company. Wisconsin law requires liability insurance, but rental companies include it in the base rate.
What is the cheapest day of the week to rent a car in Milwaukee?
Weekdays (Monday through Thursday) are cheaper than weekends. If you can rent Monday and return Friday, you will pay less per day than a Friday-to-Sunday rental. Rates also depend on season—winter is cheaper than summer.
Can I avoid the airport facility fee by renting off-airport?
Yes. Off-airport Enterprise and Budget locations do not charge the 10 percent facility fee that Mitchell Airport adds. The trade-off is you have to drive to the location yourself, but the savings are real over a week-long rental.
What happens if I return the rental car with an empty tank?
The rental company charges you for a full tank at a premium rate, usually $6 to $8 per gallon—much more than you would pay at a gas station. Fill up at a regular station within a mile of the return location before you drop off the car.