The seating arrangements of a Boeing 737 are available online at SeatGuru.com, which supplies many different arrangements based on the airline and the type of 737. All of the arrangements have at least 120 non-first-class seats, and they have at least two bathrooms.
Southwest Airlines does not carry first class sections on its 737 flights, which include five 737 models. Instead, all seats are under the economy label.
American Airlines and United Airlines use some models that they equip with 16 first-class seats and others with more than 20. Jet Airways uses 737s that carry between eight and 22 first-class seats.
The seating charts show the location of the emergency exits, so travelers wary of nearby seats can avoid them. The charts also show the locations of the galleys and bathrooms.