Help with a car rental booked through Costco Travel
Independent help. OneCall Rental is not Costco Travel and is not part of Costco Travel. We can't see your Costco Travel account, but we can help you deal with them.
Changing it, cancelling it, or sorting out a problem with a rental car you booked on Costco Travel. One agent works through it with you, start to finish.
Free call. We answer 24/7, every day of the year.
Or leave your number and we'll call you back.
How these bookings usually work
The booking sits with the rental company under a discount code
The rental company handles the car and the charges. Code-specific rules can apply, so it's worth checking yours.
Changes often mean a new booking
The usual route is to make a new reservation with the updated details, then cancel the old one. Order matters, so you're never left without a car.
Bring the membership card
The main driver usually has to show a Costco membership card in their own name at pickup. Without it, the Costco rate may not apply and the price can jump at the counter.
How you booked changes the rules
Bookings made online without paying upfront can usually be cancelled free before pickup. Prepaid rates booked by phone can carry a cancellation fee.
Additional drivers and extras
What's included depends on your booking. Your agent checks it before you get to the counter.
Every booking has its own terms. Your agent checks yours before anything is changed.
What your agent does
- Works out who controls your booking and what their terms say
- Tells you what a change or cancellation should cost before you commit
- Tells you exactly who to contact and what to ask for
- Follows up with you until it's confirmed
Questions people ask
Do I contact Costco Travel or the rental company?
It depends on what you need. Prepaid amounts and changes usually go through whoever took your money; counter charges go through the rental company. Your agent tells you which, for your booking.
What do I need for the call?
Just your phone. If you have your booking confirmation email nearby, that helps, but you don't need it to request the call.
OneCall Rental is independent and is not affiliated with or endorsed by Costco Travel. To contact Costco Travel directly, use the details on Costco Travel's official website.
Pickup, drop-off, and everything in between. You've always got someone.
Booked already? Let's check it together
Your agent goes through your reservation with you, catches any mistakes, and walks you through changing or cancelling, so nothing surprises you at pickup.
Free call. We answer 24/7, every day of the year.
Last updated 25 October 2026.