Is it normal to wear pajamas to the airport?
Mostly.Normal for most people
Yes, wearing pajamas or other cozy clothes to the airport is normal. Some people love the comfort; others prefer to get dressed, but nobody needs to make a big thing of it.
Airports involve early alarms, long waits, and cramped seats, so plenty of people dress for comfort. Pajama pants, sweats, and soft layers are all familiar sights in a terminal.
People do have different opinions: some see pajamas as cozy and practical, while others like to feel more put-together when traveling. As long as your outfit is comfortable and appropriate for the setting, wear what helps you get through the trip.