What is the primary geographic market served by Southwest Airlines?

The selection of domestic U.S. flights with some international routes to Mexico and the Caribbean accurately reflects the primary geographic market served by Southwest Airlines. Since its inception, Southwest has focused heavily on providing low-cost, no-frills domestic travel options across the United States, establishing a strong presence in key markets.

Additionally, Southwest has expanded its service to include select international destinations, primarily in Mexico and the Caribbean. This expansion aligns with the airline's strategy to cater to travelers seeking affordable options for both leisure and business travel without compromising on its primary domestic service ethos.

The options reflecting only international flights or exclusive routes to tourist destinations do not capture the breadth of Southwest's market strategy, as the airline's core operations revolve around the domestic market, supplemented by its international offerings to enhance travel options for its customers.