After you are done with your flight ticket bookings, you look forward to check-in on time. And with Southwest airlines check in, you can easily complete the formality and be assured to hop on your flight without any hassle. To have more clarity about checking in to a Southwest flight, it is good to know about the Southwest airlines check in policy. To facilitate your check-in process, the airline offers you options to choose from - web check-in, mobile check-in, and check-in at the airport.