Https://www.fimfiction.net/blog/1086483/1-southwest-best-days-what-is-the-cheapest-day-to-book-a-flight-with-southwest-airlines https://www.fimfiction.net/blog/1086483/1-southwest-best-days-what-is-the-cheapest-day-to-book-a-flight-with-southwest-airlines