$45 Car Rental Boulder, CO

Search and Compare from Car Companies in Boulder

Featured car rental suppliers

Compare from agencies

car suppliers logo

Change your mind: penalty-free cancellation on many/select car rentals

Treat yourself: One Key members save 10% or more on over 1 million car rentals

Shop Smart: Compare car suppliers and package your flight, hotel, and car to save

Top Car Deals in Boulder

* Price found within the past 6 days. Click for updated prices.

Don't see what you're looking for?

See all car rentals in Boulder
View all cars
Lowest prices found within the past 16 hours. Prices and availability subject to change. Additional terms may apply.

Frequently asked questions

How much is a rental car per day in Boulder?
The lowest daily rate for a rental car in Boulder within the past seven days was $45. With the flexibility of having your own ride, it's easy to cruise to whichever attractions are calling your name.
Can I rent a car from Boulder, CO (WBU-Boulder Municipal)?
Beat a hasty retreat from Boulder, CO (WBU-Boulder Municipal) and rent a car from Enterprise. This rental car outlet is a quick commute from the terminal.
What happens if I need to cancel my Boulder car reservation?
Depending on your rental policy, you may qualify for a refund. Many prepaid rentals offer a full refund if you advise us six hours prior to picking up the car. Still have some queries? If you can't find the answer in your booking details, our Customer Service Portal is always here.
Where can I go on a road trip from Boulder?
Boulder has plenty to keep you busy, but don't limit yourself to only one place. Book a set of wheels and hit the open road to see what else awaits in the wider region. These are some great options:

  • Head off to Colorado Springs for an excellent sightseeing adventure. About 85 miles from Boulder, it has many great sights like Garden of the Gods.
  • Your next pit stop? Cheyenne, which is around 80 miles away. Cheyenne Frontier Days Old West Museum is one local hot spot you really shouldn't miss.
  • Head to Great Sand Dunes National Park to discover some local nature. Take a picnic to enjoy or just sit and unwind. From Boulder, it's approximately 160 miles away.

How do I find the best car rental deals in Boulder with Expedia?
Expedia makes it a cinch to compare rates, offers and rental companies, and to check customer recommendations. Bundle your Boulder car rental with hotel or flight bookings and you can make even bigger savings.
How old do you have to be to rent a car in Boulder?
Rental vehicle rules in Boulder require drivers to be at least 21. Are you a younger driver? Some restrictions and surcharges could apply. Many rental suppliers impose what is known as a young driver surcharge, which is an additional fee to the cost of the rental car. Restrictions generally apply to the categories of cars young motorists can rent as well. Age limits may differ between providers, so check before booking.
What do you need to rent a car in Boulder?
Renting a car in Boulder is a breeze. Normally, all that's required is your driver's license and a credit card. Once you've found your ride, check your policy to make sure there are no extra requirements prior to your scheduled pickup.
What is the cheapest car rental in Boulder?
$45 and $46 were the two lowest daily rates for car rentals in Boulder within the past seven days. These rates were available on Expedia, with a rental starting date within the next year. Prices and availability are subject to change and additional terms apply.
Can I rent a car for a month or longer in Boulder?
You can. We partner with trusted providers that offer long-term rentals for many categories of cars. Check out our long-term car rental deals and explore every nook and cranny of Boulder — or far beyond!
Where can I find a Boulder car rental if I am younger than 25?
If you're a younger driver hoping to book a rental in Boulder, check the terms and conditions of the various car rental companies you're interested in. Some may rent to drivers under the age of 25, some may not. There may be extra costs if you're aged between 21 and 24. To escape any unwanted surprises on pickup, make sure you know if any extra charges apply to you.
What insurance should I choose for my car rental in Boulder?
For a safe, stress-free journey, add Expedia's collision protection to your rental car booking. This insurance covers your ride against vandalism, accident damage and theft. It also provides round-the-clock emergency assistance in times of need. Opt in to this insurance while finalizing your Boulder vehicle with Expedia and save money and time at the rental desk.

Car Rental Information

 
Popular car types
SUV, Full Size, Economy
 
Car suppliers available
 
Our best deal of the day
$45
 
Our second best deal of the day
$46
 
Our third best deal of the day
$51
 
From the airport to your hotel
Airport Transportation
 
From popular domestic and international airports
Airport Car Rentals

Finding the cheapest car rentals in Boulder

Using our Search Wizard

If the deals that are available on our page do not suit your needs, then enter Boulder into the search wizard at the top of the page. We will compare all the best deals available for your car rental in Boulder and provide you with a list of the cheapest options, with no added fees.

Renting a car in Boulder

Pay at pickup is available, so you don’t have to worry about spending your money until you arrive at your vehicle in Boulder. We partner with reliable partners that guarantee an enjoyable experience for solo travelers, couples, and families. Package your car with a flight or hotel to unlock even more savings from Expedia.

Expected prices in Boulder

Prices are subject to seasonal change depending on when you decide to arrange your car rental but right now you can book from $45.

Flexibility & Cancellation

Most car suppliers offer penalty-free cancellations, so you don’t have to worry about losing money if your plans change. To cancel your booking log into your account through the Trips portal. Click manage booking and cancel this car. If you needed to alter your booking, then you can create a new one once you have canceled.

We all love being rewarded

One Key members save 10% or more on select hotels, cars, activities and vacation rentals. Not only that, earn OneKeyCash for every dollar spent on eligible hotels, vacation rentals, flights, car rentals, and more when you book across our family of brands: Expedia, Hotels.com and VRBO. Learn more and join today.

Car classes available from Expedia in 2025

The classes of vehicles available will change depending on your chosen location.

Explore a world of travel with Expedia

Explore a world of travel with Expedia