How to Check in at the Airport: 12 Steps (with Pictures) – wikiHow

Once you have successfully made it through security, it’s time to find your plane. Check your boarding pass to see which gate your plane is departing from. Double-check this information on the departure boards that are just outside every security checkpoint. Once you have confirmed your gate number, head over in that direction.

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Stock up on food and drink. Many airlines no longer serve food on their flights. If you’re taking a long flight or traveling during a meal, buy some food and drink to take with you on the plane. Try to be considerate of your fellow travelers and don’t get anything too messy or smelly (like tuna or eggs.)