The existing flight booking software that they use (Sabre) can and does do that, but Southwest’s issue is likely their insistence on using a homegrown management system on top of that. Southwest only switched to Sabre in 2021, so it’s likely still being implemented, and their homegrown approach has likely evolved with them from their founding, so it’s not something the company itself is likely organizationally prepared for.

At least, I feel confident in that analysis, since this exact same issue happened to Southwest in 2016, before they were using Sabre. Which would point to a chronic organizational failure

https://www.washingtonpost.com/news/dr-gridlock/wp/2016/07/2...