Denver rental companies and their base rates
The major chains operating at Denver International Airport (DEN) are Enterprise, Hertz, Budget, Avis, and National. Off-airport locations in downtown Denver and along I-25 often charge less because they don't pay airport concession fees—those fees get passed to you as a surcharge at the terminal. A compact car at the airport might run $35 to $50 per day; the same car from a downtown location might be $25 to $40 per day, depending on demand and season.
Local and regional companies like Fox Rent A Car, Thrifty, and Advantage also operate in Denver. They typically undercut the majors by 10 to 20 percent on base rates, though their vehicle selection is smaller and their locations fewer. Weekend rates are often lower than weekday rates because business travel demand drops. Winter (November through March) is cheaper than summer, when tourists and ski visitors drive demand up.
Rates change daily based on how many cars the company has available and how many reservations they hold. Booking a week in advance usually locks in a better price than booking the day before, but the relationship isn't always linear—sometimes a last-minute deal appears if a location has overstock.
Key Takeaways
- Off-airport rental locations in Denver charge 20 to 40 percent less than the airport terminal because they avoid concession fees.
- Your insurance situation—what your credit card covers, what your personal auto policy covers, and what the rental company offers—determines whether you need to buy their damage waiver, which can add $15 to $30 per day.
- Fuel charges vary widely: some companies charge a premium per gallon if you return the car empty, while others charge a flat fee for a full tank upfront that you may not use.
- Booking directly on a company's website often shows lower rates than third-party sites, because the company avoids paying commission to the booking platform.
- Damage and mileage disputes happen most often when the rental agreement is unclear about what counts as normal wear and what counts as damage you pay for.
How to compare prices across sites and companies
Start by checking the company websites directly: Enterprise.com, Hertz.com, Budget.com, Avis.com, and National.com. Then check aggregator sites like Kayak, Autoslash, and Priceline to see if they show lower rates. The aggregators sometimes have deals the company websites don't advertise, but they also sometimes show prices that include fees the company website breaks out separately—so you have to read the fine print on both.
When you compare, make sure you're comparing the same thing: same car class, same pickup and drop-off location, same dates and times, same driver age. A 19-year-old driver will see a "young driver fee" added; a 75-year-old may see a senior surcharge. These fees don't always show up until you enter your age, so two quotes that look identical might not be.
Check whether the price includes taxes and airport fees. Denver airport adds a 10 percent airport concession fee plus sales tax (8.81 percent in Denver proper, varies slightly by location). A $30-per-day rate can become $45 per day once those are added. Off-airport locations don't charge the concession fee, so the math changes.
Insurance and damage coverage: what you actually need
Your personal auto insurance may cover rental cars, but only if you carry collision and comprehensive coverage on your own vehicle. Call your insurer before you rent and ask whether they cover rentals, what the deductible is, and whether they cover damage to the rental company's property (like if you hit another car). If you don't have personal auto insurance, or if your policy doesn't cover rentals, you need the rental company's damage waiver.
Credit card rental coverage is common with premium cards (American Express Platinum, Chase Sapphire Reserve, Capital One Venture X) but not with basic cards. The coverage usually applies only if you charge the entire rental to that card. Read your card's terms or call the card issuer to confirm what's covered—some cards exclude certain car types, certain countries, or certain damage scenarios.
The rental company's damage waiver (called Loss Damage Waiver, Collision Damage Waiver, or similar) typically costs $15 to $30 per day and covers damage to the rental car up to its full value. It usually has a deductible of $0 to $1,000 depending on which tier you buy. If you already have coverage through insurance or a credit card, buying the company's waiver is redundant and wastes money. If you don't have coverage, the waiver is worth the cost—a single accident can cost thousands.
Fuel charges and mileage limits
Denver rental companies use three fuel models. The first is "full to full": you pick up the car with a full tank and return it full, paying only for what you used. The second is "full to empty": you pick up full and return it empty, and the company charges you a per-gallon rate (usually 20 to 40 percent above local gas prices) for any fuel left in the tank. The third is "prepay": you pay for a full tank upfront, and if you return it with fuel left, you don't get a refund.
For a one-way rental or a short trip, prepay is often the worst deal because you're paying for fuel you won't use. Full to full is best if you can return the car with the tank at the level you picked it up. Full to empty is worst if you're bad at judging fuel consumption or if you're returning the car in a hurry and can't fill it yourself.
Mileage limits vary. Some companies offer unlimited mileage; others charge $0.10 to $0.25 per mile over a daily or weekly limit. A 100-mile daily limit sounds reasonable until you drive from Denver to Boulder and back (50 miles) plus around the city (another 50 miles) and hit the cap. Check the contract before you book, and if you're planning a long drive, unlimited mileage is worth paying extra for.
What to inspect before you leave the lot
The rental company will hand you a damage checklist—a form with photos or a written list of existing dents, scratches, and stains on the car. Walk around the car with the agent, point out any damage you see, and make sure it's marked on the form before you sign. Take photos or video of the car's condition with your phone, including the odometer reading and fuel level. This protects you if the company later claims you caused damage that was already there.
Check that the spare tire is present, the jack is present, and the emergency kit (if included) is complete. Test the lights, wipers, and air conditioning. Make sure the rental agreement lists the correct mileage and fuel level. If something is wrong, tell the agent when ready and ask them to correct the form. Don't drive off the lot if you're unsure about the condition—it's much harder to dispute damage later.
Return procedures and avoiding surprise charges
Return the car on time. Late fees are usually $25 to $50 per hour or a full day's rental charge if you're more than an hour late, depending on the company. If you're going to be late, call the rental location and ask if you can extend the reservation—extending in advance is usually cheaper than paying a late fee.
Return the car with a full tank of fuel (if you're on a full-to-full agreement) and with the interior clean of trash and personal items. The company may charge a cleaning fee ($50 to $150) if the car is visibly dirty. Return it to the same location you rented from unless you booked a one-way rental; returning to a different location may trigger unexpected fees.
Keep your receipt and the rental agreement. The company has 30 to 60 days to file damage claims against your credit card, so don't assume you're clear the moment you return the car. If a charge appears on your card weeks later, you'll need the agreement to dispute it. Take a photo of the odometer and fuel gauge at return time, just as you did at pickup.
One-way rentals and airport drop-off fees
Renting in Denver and dropping off in another city (like Boulder or Fort Collins) costs more than a round trip because the company has to move the car back or rent it out from the drop-off location. One-way fees range from $50 to $200 depending on distance and demand. For short distances (Denver to Boulder, about 30 miles), the fee is usually $50 to $75. For longer distances (Denver to Aspen, about 200 miles), it can be $150 to $300.
Dropping off at Denver International Airport instead of a downtown location also costs more—usually $15 to $30 extra—because the company pays airport fees to operate there. If you're flying out of Denver and renting a car, compare the cost of renting at the airport terminal versus renting downtown and driving to the airport yourself. Sometimes the savings on the rental rate outweigh the cost of parking or a rideshare to the airport.
Frequently Asked Questions
Do I need to buy the rental company's insurance if I have my own car insurance?
Not necessarily. Call your insurer and ask whether your collision and comprehensive coverage extends to rental cars and what the deductible is. If it does, you probably don't need the rental company's waiver. If your policy doesn't cover rentals, or if you don't have collision coverage, the rental company's waiver is worth buying to protect yourself from a large bill.
What's the difference between renting at the airport and renting downtown?
Airport rentals include a 10 percent concession fee plus sales tax, which can add $15 to $20 per day to your bill. Downtown locations don't charge the concession fee, so the same car costs less. The tradeoff is convenience: the airport is on-site when you land, while downtown locations require a rideshare or rental car shuttle to reach them.
Can I negotiate the rental rate or ask for a discount?
Rates are usually set by the company's system and don't change based on negotiation. However, if you're a member of AAA, AARP, a military veteran, or a frequent renter program, you may see a discount code when you book. Some companies also offer discounts for booking through their website instead of a third-party site. Check the company website for current promotions.
What happens if I return the car with damage I didn't cause?
The rental company will photograph the damage and may charge you for repairs. Dispute the charge with your credit card company if you believe it's unfair, and provide your photos from pickup and the damage checklist you signed. If the damage was pre-existing and marked on the form, you won't be charged. If it wasn't marked, the burden is on you to prove it was already there.
Is it cheaper to rent for a week than to rent day-by-day?
Usually yes. Weekly rates are often 15 to 30 percent lower per day than daily rates. If you're renting for five or more days, ask the company to quote you a weekly rate and compare it to the daily rate multiplied by the number of days. Sometimes the weekly rate is cheaper even if you're only keeping the car for six days.