Southwest Airlines may let passengers check bags for free, however they’re finding other ways to increase revenue. The latest announcement by Southwest is for those who wish to have an upgraded boarding position, will now be charged as much as $50 for this benefit. You can view all of the optional fees Southwest Airlines charges passengers.

This isn’t to be confused with their $15 Early Board Check-In fee, which allows you to check-in earlier, but doesn’t necessary guarantee an A boarding pass. This feature is for those who do not have a good priority and wish to move up to A1-A15, you can do so at the gate.

Here’s How Southwest Describes this:

Get an A1 – A15 boarding position

Now you can be one of the first on the plane by upgrading on the day of travel! When available, Upgraded Boarding allows you to secure a position in the A1 – A15 boarding group for just $30, $40, or $50 per flight, depending on your itinerary.

To upgrade, ask a Customer Service Agent at the departure gate or ticket counter for availability.

Delta recently implemented Zone 4 boarding for passengers on Basic Economy fares, and already boards by fare class for two of their other zones.