Southwest Airlines just like any other airlines let you make modifications in your bookings on its official website. Look at the steps mentioned below to make changes to your reservations.

Head over to the official online homepage of Southwest Airlines
Navigate to the account login section or the Flight tab on the top
Now either you can log in to your account or simply select the Change Flight option
Next, if you have opted for Changer Flight option then enter all the required details as per mentioned on your flight ticket
Now, click on the Change Reservation button and then enter all the requested details
Next, follow the onscreen instructions in order to make changes into your reservations

Hence, you’ll be able to change your flight reservations, furthermore, contact reservation center to gain more information on the Southwest Change flight policy or other details

https://www.godhelpu.com/southwest-airlines-cancellation-policy