Seats on board Southwest are not reserved. Ticketed passengers are placed in three groups depending on when they reserved their flight, and each group is boarded one at a time and allowed to choose their own seat.
Passengers are allowed two checked bags (with no fees) and one carry-on bag, plus a personal carry-on item (purse, briefcase, laptop). Checked bags have a limit of 50 pounds and 62 linear inches. Carry-on bags are limited to 40 pounds and 10-by-16-by-24 inches.
Personal snacks are allowed on board the flight. Food containers will count as personal carry-on items unless they are disposable
Children age 5 to 11 may be unaccompanied on a direct flight (nonstop or no change of plane), but may require proof of age like a birth certificate. Children under five must be accompanied by a ticketed passenger at least 12 years old.
Per federal regulations, passengers may not sit next to an emergency exit if they are not able to locate, properly operate and quickly exit through the emergency exit should it be needed.