Description: Boeing 737-700 from Southwest Airlines taking off from runway 19R at John Wayne International.
The airline operates more Boeing 737s in its fleet than any other airline in the world.
Southwest's 737-300 and 737-500 aircraft are not equipped with glass cockpit technology, as the 737-300s, 737-400s, and 737-500s of some other airlines are. Instead, the flight decks are fitted with analog gauges, more similar to those of the earlier 737-100 and 737-200 variants. Note the analog attitude deviation indicator (ADI) and horizontal situation indicator (HSI) (the blue-colored instrument and one below it) in this Southwest 737-3H4 and note the electronic versions of the same instruments (EADI and EHSI) in this United Airlines 737-322. There are electronic displays throughout the cockpit of the 737-700 and other "Next Generation" 737 variants, and Southwest has programmed their 737-7H4 models to emulate the appearance of the 737-300 and 737-500 for standardization purposes.
Since production of the 737-300 and 737-500 has ended, recent Southwest orders have been exclusively for the 737-700 model. Retirements of some older 737-300 models commenced in December of 2007.
Southwest is the world's largest operator of the 737. Their current active fleet is over 500 aircraft. In terms of total 737 production, deliveries of new aircraft from Boeing to Southwest accounts for approximately 9% of total production. Southwest has one of the largest fleets in North America.