Yes, Southwest Airlines' online check-in opens 24 hours before a flight's departure.{+𝟭-𝟴𝟬𝟰↭𝟴𝟱𝟯↭𝟵𝟬𝟬𝟭}) However, you can check in for your flight as early as 60 minutes before the scheduled departure time, depending on the destination and departure city.
