Southwest Airlines is offering 30% off many flights this summer and fall, but the deal isn't available on every ticket.

Southwest has announced its new pricing structure. Here are the four fare bundles, the perks and restrictions of each bundle and when they go on sale.

Southwest Airlines unveiled new fare bundles this week, giving fliers a first look at how different fares will determine seat selection, checked bag charges, refunds and more. The new bundles are a shift from the usual tickets that range from the cheapest Wanna Get Away fares to the more luxurious Business Select fares.