How long do I have to cancel a Expedia flight without penalty?

Expedia allows you to cancel a flight without penalty within 24 hours of booking, provided the flight is at least 7 days away. After that, cancellation policies depend on the airline’s rules. Some may offer refunds or credits, while others impose fees. Always review the specific terms for your booking.

Source: https://support.google.com/admanager/thread/306588227/how-long-do-i-have-to-cancel-a-pedia-flight-without-penalty