Related: Frontier Airlines Just Announced Its All-You-Can-Fly Summer Pass A golf bag or skis in a container acceptable to Southwest can be substituted for one checked bag. When you fly with us, your first and second checked bags fly free. Its new attempts to accelerate boarding include playing up-tempo music, which research shows makes passengers move faster, and installing video monitors with boarding countdowns and carpeted areas in different colors to section off preboarding passengers. All Southwest fares come with: Two bags fly free1.

Southwest is already known for its boarding process, which forgoes assigned seats and instead assigns customers a letter and number based on when they check in for the flight. You may also check in and/or get a boarding pass upon arrival at the airport at a self-service kiosk (where available), the Skycap podium (in select locations), the Southwest Airlines Ticket Counter, or at your departure gate. 'How can we better understand some of the human behavior that slows that process down?'' If you have an eligible reservation you may check in for your flight online at beginning 24 hours prior to your flight's scheduled departure time.

'We want to truly understand at its most granular level of detail how passengers move on and off our aircraft,'' Angela Marano, vice president of business transformation at Southwest, told WSJ.

Southwest airlines check in mobile pass