southwest utilizes open seating - thus there is no seat selection. Details are here: https://community.southwest.com/t5/Knowledge-Base/Where-is-my-seat-onboard/ta-p/100790 The best way to get a a good boarding position is to purchase Early Bird Check In. EBCI boarding positions are allocated. 36 hours before flight time - first EBCI bought on the flight gets the first one. The last person to buy one gets the last one. those that do not buy EBCI can check in starting 24 Hours before your flight time. Your boarding position is set at the time of check in. The earliest check ins get the best boarding positions thus it is best to check in EXACTLY 24 hours before flight time
... View more