The websites that show the lowest rental car rates

The cheapest rental car websites are comparison sites that pull rates from multiple rental companies at once, letting you see which one is lowest for your specific dates and location. The main ones are Kayak, Autoslash, Priceline, and Hotwire. Each pulls from different rental chains—some include regional companies, some focus on the big five (Enterprise, Hertz, Budget, Avis, National), and some have exclusive deals you won't see elsewhere.

Direct booking on a rental company's own website sometimes beats the comparison sites, especially if you have a membership or loyalty account with them. Enterprise, Hertz, and Budget often run their own promotions that don't show up on third-party sites. The trade-off is that you have to check each company separately instead of seeing all options at once.

Hotwire and Priceline work differently: they show you the rental company only after you book, and the price is lower because you're giving up that choice. If you're flexible about which company you use and just need a car, this can save 20 to 40 percent. If you have a preference—say, you want Enterprise because of their location near your hotel—you'll want to use a comparison site instead.

Key Takeaways

  • Kayak and Autoslash let you compare rates from multiple rental companies side by side for the same dates and location.
  • Hotwire and Priceline hide which rental company you'll get until after you book, which lowers the price but removes your choice.
  • Checking the rental company's own website directly sometimes shows lower prices than comparison sites, especially for members or during promotions.
  • The cheapest option changes based on your location, travel dates, and how flexible you are about which company you use.
  • Rental car prices spike during peak travel times and in tourist areas, so booking earlier and comparing across multiple sites matters more than which site you use.

How comparison sites actually work

Comparison sites like Kayak and Autoslash don't own any cars. They pull live pricing from rental companies' reservation systems and show you what each one charges for your exact dates, location, and car type. When you click through to book, you're sent to that rental company's website to complete the transaction. The rental company pays the comparison site a commission, which is why the price you see on Kayak is usually the same as the price on the rental company's own site—the commission comes out of the company's margin, not your pocket.

Autoslash has one feature the others don't: it tracks your reservation and emails you if the price drops after you book. You can rebook at the lower rate without penalty. This matters most for bookings made weeks in advance, when prices shift more often.

Kayak's strength is speed and breadth—it searches a wide range of companies including some regional ones, and the interface is fast. It also shows you the total price upfront, including taxes and fees, so you're not surprised at checkout. Priceline's comparison tool works the same way, though Priceline also owns Autoslash, so the underlying data is similar.

Opaque booking sites and when they save money

Hotwire and Priceline both offer "opaque" bookings where you see the price and car type but not which rental company you'll get until after you pay. The rental company is revealed in your confirmation email. This model works because rental companies use it to sell off excess inventory without undercutting their own direct bookings—they'd rather have a customer at a lower price through Hotwire than no customer at all.

The savings are real but come with a trade-off. You might book what you think is a mid-size sedan and end up with a compact, or you might get a company with a location farther from your hotel. You cannot choose. If you have no preference and just need wheels, the 20 to 40 percent discount is worth it. If you want a specific company because of their loyalty program, customer service reputation, or location, use a comparison site instead.

Hotwire tends to have better inventory in major cities and airports. Priceline's opaque bookings are less common now—they've shifted toward showing you the company upfront more often. Both sites show you the car class and rental location before you commit, so you can see whether the location works for you.

Membership programs and loyalty discounts

Enterprise, Hertz, Budget, Avis, and National all run loyalty programs that offer discounts, free upgrades, or waived fees. If you rent cars regularly—even just a few times a year—joining is free and can save you 10 to 20 percent on each rental. The discounts show up when you book on the company's website or when you enter your membership number on a comparison site.

Some memberships are tied to credit cards or insurance policies. If you have AAA membership, AARP membership, or a corporate account through your employer, you may already have a rental car discount available. Check your membership card or call the company to ask what rental discounts come with it. These discounts sometimes don't show up on comparison sites, so booking directly on the rental company's website is the only way to see them.

Costco Travel, if you're a Costco member, offers pre-paid rental car packages at locked-in rates. You pay upfront for a certain number of days at a set price, and you can use it at any of the major rental companies. This works well if you know your travel dates well in advance and want to lock in a price before rates climb.

What affects the price you see

Rental car prices are not fixed. They change based on demand, location, season, and how far in advance you book. Summer, holidays, and weekends are peak times when prices spike. Booking a week or two ahead usually shows lower rates than booking the day before. Airport locations charge more than off-airport locations because of airport fees and taxes.

The type of car matters too. Economy cars are usually cheapest, but during peak times they sell out first and prices climb. Mid-size and full-size cars sometimes become cheaper than economy cars in those moments because demand is lower. Checking a few different car types on the same search can reveal these price shifts.

One-way rentals (picking up in one city and dropping off in another) cost more than round-trip rentals from the same location. The rental company has to move the car back, and that cost gets passed to you. Some locations charge drop-off fees on top of the daily rate.

How to actually find the lowest price

Start by searching on at least two comparison sites—Kayak and Autoslash, or Kayak and Priceline. Prices can vary between them because they pull from slightly different rental company inventories. Then check the lowest-priced rental company's website directly to see if a loyalty discount or promotion brings it lower.

If you're flexible on dates, search a range of dates rather than a single day. A one-day shift can mean a 30 percent price difference. If you're flexible on location, compare airport pickup versus off-airport locations—sometimes a location 10 miles away is half the price.

Clear your browser cookies before searching, or use an incognito window. Some sites track your searches and may show you higher prices if they see you've looked multiple times. This is not universal, but it happens often enough that it's worth doing.

If you find a low price on Autoslash, book it there and let the price tracking run. If the price drops in the next few days or weeks, Autoslash will email you and you can rebook. This is the only major comparison site that offers this feature, and it can save you money on advance bookings.

What to watch out for

The price shown on the comparison site is usually the final price, including taxes and fees, but read the fine print. Some sites show the base rate and add taxes at checkout. The difference can be 15 to 25 percent depending on your location.

Insurance is not included in the base price. The rental company will offer you collision damage waiver (CDW) or loss damage waiver (LDW) at checkout. Your personal auto insurance or credit card may already cover rental cars, so check your policy before you book. Declining the rental company's insurance can save $15 to $30 per day.

Fuel charges are a common surprise. Most rentals require you to return the car with a full tank or pay a refueling fee. The refueling fee is usually higher than the cost of gas at a pump. Some rental companies offer a pre-purchase fuel option where you pay for a full tank upfront at a set price—this can be cheaper if you won't return the car completely empty, but it's a gamble.

Read the cancellation policy before you book. Free cancellation is common, but some discounted rates are non-refundable. If your plans might change, pay a few dollars more for a refundable rate.

Frequently Asked Questions

Is it cheaper to book a rental car through a travel site like Expedia?

Travel sites like Expedia and Travelocity pull rental car rates just like Kayak does, so the prices are usually the same. The difference is that Kayak is built specifically for car rentals and shows more options side by side. If you're already booking a hotel on Expedia, bundling the car rental might trigger a package discount, so it's worth checking. Otherwise, a dedicated car rental comparison site usually shows your options faster.

Why is the price different when I search on my phone versus my computer?

Prices can shift between searches because rental car inventory and rates update constantly. If you searched on your phone an hour ago and search again on your computer now, the price may have changed because other people booked cars or the rental company adjusted rates. It's not usually because of the device itself, though some sites do show slightly different results on mobile versus desktop.

Can I negotiate the price at the rental counter?

Negotiating is rarely successful because the counter agent's system shows them the rate you agreed to online, and they have little power to change it. The time to negotiate is before you book—by comparing sites, checking for loyalty discounts, and booking at the right time. Once you're at the counter, the price is locked in.

What's the difference between a daily rate and a weekly rate?

Rental companies often offer a lower per-day rate if you book for a full week (usually seven consecutive days) than if you book individual days. If you need a car for six or seven days, searching for a seven-day rental sometimes costs less than six one-day rentals. The comparison sites show both options, so you can see which is cheaper for your dates.

Do I have to book online, or can I call and get a better price?

Calling rarely gets you a better price than booking online. The rates are set in the company's system, and the phone agent sees the same rates you do. Calling is useful if you have questions about insurance, fuel options, or your loyalty account, but for price shopping, online is faster and shows you all options at once.