Yes, online check-in is available for most flights and some hotels.
Flights
Available 24 hours to 1 hour before departure.
Go to My Bookings > Select Flight > Online Check-in.
You can select seats and print your boarding pass or save it to your phone.
Hotels
Some partner hotels allow pre-check-in via the app to speed up the process at the front desk. Look for the "Online Check-in" badge on your booking voucher.