My friends at Delta want to make sure you travel plans go without a hitch, so that you can spend your time with family and friends, rather than TSA agents! Check in online up to 24 hours before departure, or from a web-enabled mobile device in select cities. Arrive at least 90 minutes prior to domestic departures and 3 hours prior to international flights to meet required check-in times and clear security (and don't forget to sign your passport!). Size up your carry-on bag to ensure it fits our requirements (22" x 14" x 9" with wheels and handles), and review checked baggage rules (no wrapped packages, please!) and fee information. Submit a request for wheelchair assistance at least 24 hours prior to the day of travel so we can accommodate your needs. Know the requirements for the security checkpoint, pack your 3-ounce containers of liquids in a quart-size clear plastic zip-top bag, and read the DOT's Safe Travel information about traveling with spare batteries. Happy Holidays All!