Depending on the requirements of airport authorities, you will need to present a mobile boarding pass, a paper boarding pass printed out by you or a paper boarding pass picked up from the check-in desk.
4.2 Take-off. Takeoff is the phase of flight in which an aircraft goes through a transition from moving along the ground (taxiing) to flying in the air, usually starting on a runway. ...
Boarding passes are provided directly by the airline after checking in for your flight. If the airline you're flying with offers online check-in 24 hours before departure time, you can usually print your boarding passes directly from the website or have them sent directly to your phone!
It is recommended that medication be clearly labeled to facilitate the screening process. You may bring medically necessary liquids, medications and creams in excess of 3.4 ounces or 100 milliliters in your carry-on bag. Remove them from your carry-on bag to be screened separately from the rest of your belongings.
The process of determining where a visa is required also varies between airlines, but most major airlines use a system called Timatic, which is normally automatically queried during check-in to determine the exact documentation requirements for a trip.
The Federal Aviation Administration (FAA) requires commercial aircraft in the US to have four pieces of paperwork onboard before it can fly. These are the airworthiness certificate, registration certificate, operating manual, and weight & balance. The regulatory authorities use the acronym AROW for this requirement.
Firearms, ammunition, and fireworks are prohibited, as are all knives and safety razors (including pocket knives and Swiss Army knives). Straight razors and replacement blades for straight razors are also not allowed. Most tools also cannot be packed in carry-on luggage, as they have the potential to cause harm.
You can't make phone calls on a plane using cellular service, as using cellular service for any reason isn't permitted. WiFi calls may be allowed, though that's at the discretion of the airline, as it impacts passenger comfort.
Solid food items (not liquids or gels) can be transported in either your carry-on or checked bags within the continental United States. Liquid or gel food items larger than 3.4 oz are not allowed in carry-on bags and should be placed in your checked bags if possible.