And from WN's website ...1500 hours total fixed-wing time as pilot-in command (PIC) or first officer (SIC) including a minimum 1000 hours PIC in fixed-wing jet, fixed wing multi-engine turbo-prop, or multi-engine recip over 20,000 LBGW or combination thereof.
2500 hours total or 1500 hours TURBINE total. Additionally, a minimum of 1000 hours in Turbine aircraft as the **Pilot in command, as defined by FAR PART I is required. Recency of experience is considered. Southwest considers only Pilot time in fixed wing aircraft. This specifically excludes simulator, helicopter, WSO, RIO, FE, NAV, EWO etc. NO other time is counted.**