Allegiant Airlines check in process is designed to provide passengers with a convenient and efficient start to their journey. The airline's website, smartphone app, and airport counter are just a few of the places where passengers can check in for their flights. Passengers can choose seats, add baggage, and get their boarding cards electronically by checking in online, which normally opens 24 to 48 hours before the scheduled departure time. As a result, passengers can arrive at the airport and proceed directly to security and the gate.
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