What happens if you don t check in 24 hours before your flight?

If you don’t check in, you won’t receive a boarding pass that allows you to board the plane, and your seat might be given up to a standby passenger. The check-in process also confirms your traveler details like your passport information and frequent flyer number. 28-Nov-2022

https://www.going.com/glossary/check-in#:~:text=If%20you%20don’t%20check,information%20and%20frequent%20flyer%20number.