Where to look for lower prices on car rentals

The cheapest car rental in Colorado depends on which city you're renting from, what dates you need the car, and which company has inventory that week — prices shift constantly. Rather than one "cheapest" option, you're looking for the lowest price on the specific dates and location you need. Start by checking the major rental companies' websites directly: Enterprise, Hertz, Budget, Avis, and National all operate in Colorado. Then use a price comparison site like Kayak, Autoslash, or Priceline to see what those same companies are quoting for your exact dates and location.

Local and regional companies sometimes undercut the national chains. In Denver, companies like Fox Rent A Car and Thrifty often quote lower daily rates than Enterprise or Hertz, though you'll want to read the fine print on mileage limits and insurance costs. The trade-off is that smaller companies may have fewer locations and less flexible cancellation policies, so factor that into your decision.

Prices are lowest when you book a week or more in advance and when you rent on weekdays rather than weekends. If your dates are flexible by even a day or two, check the price for each day — sometimes Wednesday through Thursday costs noticeably less than Friday through Sunday for the same car type.

Key Takeaways

  • Compare prices across multiple sites at once using Kayak, Autoslash, or Priceline rather than checking each rental company separately.
  • Local companies like Fox Rent A Car and Thrifty in Denver often quote lower daily rates than national chains, but check mileage limits and cancellation terms.
  • Booking a week or more ahead and renting on weekdays instead of weekends typically results in lower daily rates.
  • Insurance, mileage fees, and airport surcharges can add 30 to 50 percent to the quoted daily rate, so read the full price breakdown before booking.

Hidden costs that inflate the final bill

The daily rate you see quoted is rarely the final price you pay. Airport location fees add $5 to $15 per day at Denver International Airport and other major hubs — if you can pick up the car at an off-airport location like a downtown Denver branch, you'll avoid this charge entirely. Some companies waive the airport fee if you book directly through their website rather than through a comparison site, so it's worth checking both.

Mileage limits are a second major cost. Budget and some other budget-tier companies often quote a lower daily rate but include only 100 to 150 free miles per day; anything beyond that costs 25 to 35 cents per mile. If you're driving from Denver to the mountains and back, you'll hit that limit quickly. Enterprise and Hertz frequently offer unlimited mileage at a slightly higher daily rate, which is cheaper overall if you're driving more than 200 miles total.

Insurance is the third place costs balloon. Your personal auto insurance may already cover rental cars, and many credit cards include rental car coverage — check your policy and card benefits before you book. If you need to buy insurance from the rental company, expect to pay $15 to $25 per day for collision and liability coverage. Declining insurance entirely is risky if you don't have coverage elsewhere.

How to compare the real total cost, not just the daily rate

When you're looking at quotes, write down the full breakdown for each option: daily rate, number of days, mileage limit, airport fees, insurance cost, and taxes. Multiply the daily rate by the number of days, add the airport fee (if applicable), add insurance, then add Colorado sales tax (which varies by county but is typically 7 to 8 percent). That total is what you'll actually pay.

A rental that quotes $35 per day with a $10 airport fee, unlimited mileage, and no insurance charge will cost roughly $245 for a three-day rental (before tax). A rental that quotes $25 per day but charges $10 per day for insurance, $10 airport fee, and limits you to 150 miles per day will cost roughly $215 for three days — but only if you drive under 450 miles total. If you drive 600 miles, the overage charges push it to $280 or more.

Autoslash and Kayak both show the full estimated total at checkout, so you can compare apples to apples. Don't rely on the headline daily rate alone.

Membership discounts and loyalty programs

If you rent a car more than once or twice a year, joining a rental company's loyalty program costs nothing and typically saves 10 to 15 percent on future rentals. Enterprise Plus, Hertz Gold Plus Rewards, and Avis Preferred all waive the counter stop on pickup and dropoff, which saves time. More importantly, they often include a discount code you can enter when booking online, which lowers the daily rate before taxes and fees.

AAA membership, AARP membership, and some employer benefits programs include rental car discounts — usually 10 to 20 percent off the base rate. Check whether your membership or employer offers this before you book. The discount code goes into the promo field on the rental company's website or the comparison site.

Military discounts and government employee discounts are also common. If you're active duty, a veteran, or a federal employee, ask the rental company whether they have a program for you. These discounts stack with some loyalty programs but not others, so read the terms.

Booking directly versus using comparison sites

Comparison sites like Kayak and Autoslash show you prices from multiple companies at once, which saves time. However, some rental companies offer a lower rate if you book directly on their website — you'll sometimes see a banner saying "Book on our site and save $5 per day." It's worth checking the company's own website after you've found a competitive price on a comparison site.

Autoslash has a feature where you can enter your reservation and it will monitor the price; if the rate drops, it alerts you and you can rebook at the lower price. This is useful if you're booking weeks in advance and prices are still moving around.

One downside of comparison sites: if something goes wrong with your reservation, you may have to contact both the comparison site and the rental company to resolve it. Booking directly means one point of contact, which can be simpler if you need to make changes.

Rental car types and what they actually cost

Economy and compact cars are the cheapest daily rate, typically $30 to $50 per day in Colorado. Midsize sedans run $40 to $65 per day. SUVs and trucks cost $60 to $100 or more per day. However, the cheapest category isn't always the best deal if you need to pay per-mile charges — a slightly larger car with unlimited mileage can cost less overall than a cheap economy car with a 150-mile daily limit.

Rental companies often upgrade you to a larger car for free if the economy car is unavailable, so you might book an economy rate and receive a midsize sedan at no extra charge. This is more common during slower travel periods. You won't know until you arrive at the counter, so don't count on it.

Timing your rental to get the lowest rate

Prices are highest during ski season (December through March) and summer vacation (June through August). If you have flexibility, renting in April, May, September, or October will be noticeably cheaper. Spring break and holiday weekends also drive prices up, even outside the peak seasons.

Within a single week, weekday rentals (Monday through Thursday) are cheaper than weekend rentals. If you can shift your trip by a day or two, the savings can be significant — sometimes 20 to 30 percent lower on a Wednesday pickup than a Friday pickup.

Booking in advance (7 to 14 days ahead) usually locks in a lower rate than booking the day before or the day of. However, if you're flexible, it's worth checking the price a few days before your trip — sometimes rates drop as the rental date approaches if the company has excess inventory.

Frequently Asked Questions

Can I rent a car in Colorado without a credit card?

Most major rental companies require a credit card for the reservation and to cover the security deposit. Some smaller companies or locations may accept a debit card, but they typically place a larger hold on the account — sometimes $500 or more. Call the rental company directly to ask about their debit card policy before you book.

What happens if I return the car late?

Late fees vary by company but typically range from $25 to $75 per hour, or a full day's rental charge if you're more than an hour late. Some companies charge a flat fee for returning the car the next day. Check the rental agreement for the specific policy, and call ahead if you think you'll be late — sometimes the company will waive the fee if you notify them in advance.

Do I need to buy the rental company's insurance if I have my own car insurance?

Check your personal auto insurance policy first — many policies cover rental cars at no extra cost. If your policy doesn't cover rentals, check your credit card benefits; many premium cards include rental car coverage. If you have neither, you'll need to buy insurance from the rental company or go uninsured, which is risky. Read your policy or call your insurance company before you book.

Is it cheaper to rent from an airport location or a downtown location?

Downtown and off-airport locations usually have lower daily rates and no airport surcharge, which can save $10 to $20 per day. However, you'll spend time and money getting to that location. If the off-airport location is far from where you need to be, the savings may not be worth the extra travel time and cost.

What if the price drops after I book?

Most rental companies allow you to rebook at a lower price if rates drop before your pickup date. You can cancel your current reservation and rebook, or contact the company directly and ask them to adjust the rate. Autoslash monitors prices and alerts you if a lower rate becomes available, which makes this easier.