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If you’ve been around miles and points travel at all, you are probably familiar with Autoslash. It’s an awesome tool for finding the best publicly available car rental rates, and then monitoring rates and sending a notification if a better rate comes available for your rental.

Sometime last year, Autoslash stopped offering to book most rentals, and sends you to Priceline instead, where you can book and then go plug your confirmation number in under the ‘Track a Rental’ tab on Autoslash. It works, but there are at least a couple of problems with this:

  • Car rental companies may prioritize direct bookings if they run out of cars. We had this happen on an Autoslash/Priceline Avis booking in Belize this spring, and we wound up getting walked to a different (local) agency and getting a smaller car for the same price.
  • Unless you do some digging around and figure out how each system works, you may lose the ability to skip the line, get points, etc if you book through a 3rd party such as Priceline.

So, here’s what I have done a couple times since March, in screenshots:

For reference, these are the rates on Priceline and National without going through Autoslash.


Autoslash rate is better!



Clicking through took me to this Priceline page.


If you scroll down, click add-ons and then rewards points and discounts, you can see the discount codes.


Pasted into National, and…


Much better, and I can go ahead and pay $6 to skip the counter and get on the road!

Notice the rate is for ‘National.com last minute specials’, not some corporate code that I’m not technically eligible for. This is the best method I’ve found to get the best possible rate while avoiding the headaches that could come with ‘hacking’ car rentals further. Also, I can still plug my National confirmation in at Autoslash to get updates for lower rates.

But, it turns out this isn’t a great idea for all of us to use. Autoslash can exist because they earn a commission from Priceline on these bookings. Some of the coupon codes are likely public, but others of the coupon and corporate codes may be specific to Autoslash, so using those could amount to stealing.

Also, you can earn points and benefits and skip the line on these postpaid Priceline rentals, and even use the Emerald or Executive Aisle with National. Thanks to Jonathan from Autoslash for commenting with a link to this blog post that covers some of that info. But, a big part of the reason I went digging for a better way was because this info is hidden – I couldn’t find it digging around the autoslash site for a while even when I knew it existed! And, based on info on Flyertalk the National Aisle benefit apparently just works if you use the drivers license in your profile and rent an intermediate car. Autoslash could certainly do a lot better job of letting occasional users know how to use their service while maximizing the renter’s benefits!

It’s been just about forever since I posted, I’m glad to see the blog still works! Maybe I’ll post some more stuff if I feel like doing some trips reports, or stumble on some more overlooked-but-shareable tips.


We decided to come back from Cuba. Actually we never went, but working, traveling and family-ing left little time for blogging, a labor of love that hasn’t seen much labor for over a year. But, I stumbled on something that seemed to deserve a post.

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