Hand over any luggage that would need to go into the aircraft hold, if you are travelling with luggage.
Pass through the airport security gates to the departures hall.
Find your boarding gate.
Board the plane and fly to your destination.
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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.
Checking in online is far more convenient than checking in at the airport. However, if you have to check in special luggage such as bulky goods or a pet, you should rather use the classic method.
In general there's no limit. Remember, if you have arrived on an international flight and are catching another international flight out, you could remain airside for maybe 6–9 hours or longer.
You can bring an empty reusable water bottle through TSA security. Read: It has to be empty. After your items and carry-on bag have gone through security, you can fill up your water bottle at a nearby refilling station. If you bring your full water bottle to the security checkpoint, it's not a big deal.
How early should you arrive at the airport? Airlines generally recommend arriving at the airport at least three hours before an international flight and two hours before a domestic flight. There are a few considerations, though, and I usually treat each trip to the airport on a case-by-case basis.
You are allowed to bring a quart-sized bag of liquids, aerosols, gels, creams and pastes through the checkpoint. These are limited to 3.4 ounces (100 milliliters) or less per item. This is also known as the 3-1-1 liquids rule.
Stick deodorant is fine in any size. Well, almost any size… Powders and crystals are good to go as well. Spray, Gel, Liquid, Cream, Pastes, and Roll-On deodorants need to be in containers no larger than 3.4 ounces and placed in a clear quart-sized baggie.
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.
What to Do After Online Check-In. Once you receive your electronic boarding pass, you can head straight to security if you're traveling carry-on only. If you're checking a bag, you'll still need to stop by the ticketing area at the airport. Look for special “bag drop” lines that bypass longer check-in lines.
Online Check-inIt's usually in the same document as your boarding pass. Normally, you will need to arrive at the airport at least 90 minutes prior to your scheduled departure time if you have baggage to check for an international flight.
Many passengers wonder: “Are an airline ticket and a boarding pass the same thing?” No, an airline ticket and a boarding pass are not the same thing. An airline ticket is proof of purchase of a flight or airfare, while a boarding pass is the passenger's identification to board the aircraft.
Yes, simply show your mobile boarding pass on a mobile phone, iPad, or Apple Watch and a valid form of identification to the TSA Agent at security to proceed. To board your flight, scan your mobile boarding pass by holding one of the devices listed above with your pass facing the scanner.