Southwest Airlines Flight Booking Help- Online Reservations

You can either book a flight on Southwest Airlines Official Site or App.
Easy steps to book one:

Choose the type of your trip (one way/round/multi-city trip)
Select your date of departure (and return in round or multi-city)
Enter the number of passengers
Press on “find your flight”
Choose the timing and price from the available options
Next, you will see a single page with all the relevant information including the baggage
allowance and your change policy for your ticket in concern
Finally, you just need to choose the payment options and you are good to go.