To cancel a car reservation:

  1. Launch the Expedia app.
  2. Tap TRIPS.
  3. On the Trips List screen, tap the car card that you want to modify.
  4. In the Booking Info section, tap Additional Information. A web view of your booking appears.
  5. In the Rental Car Overview section, click on Cancel this reservation.
  6. Tap the yellow Cancel this reservation button to confirm.

To contact an Expedia booking support representative for help modifying a booking, see the How do I get help with a booking? support topic.