Check the Check-In Window: Southwest typically allows online check-in 24 hours before your scheduled departure time.
Download the Southwest App: If you have a smartphone or tablet, download the Southwest app.
Have Your Confirmation Number Ready: You'll need your confirmation number, which can be found on your booking confirmation
Access the Southwest Website or App: Open your web browser and visit the Southwest Airlines website or open the Southwest app.
Select "Check In": Look for the "Check In" option on the website or app. Click or tap it to begin the process.
Enter Your Information: You'll be prompted to enter your confirmation number and your first and last name.
Choose or Confirm Your Seat: If you have a preference for a specific seat, you can choose it during online check-in, subject to availability.
Print or Save Your Boarding Pass: After completing online check-in, you'll receive a boarding pass.
Arrive Early: While online check-in can save time, make sure to arrive at the airport well before your flight's departure time.