https://community.servicetitan.com/t5/General-Office/Does-United-Airlines-have-flatbeds-in-business-class/m-p/67877#M10301

https://community.servicetitan.com/t5/General-Office/1-855-738-4035-USA-Travel-What-days-are-American-Airlines/m-p/67867#M10291

https://community.servicetitan.com/t5/General-Office/Does-United-Airlines-have-flatbeds-in-business-class/m-p/67746#M10214

https://community.servicetitan.com/t5/General-Office/1-quot-855-quot-738-quot-4035-What-is-the-cheapest-day-to-book/m-p/67747#M10215

https://community.servicetitan.com/t5/General-Office/USA-Travel-What-days-are-American-Airlines-cheapest-to-fly/m-p/67554#M10108

https://community.servicetitan.com/t5/General-Office/What-day-is-cheapest-to-book-American-Airlines/m-p/67446#M10043

https://community.servicetitan.com/t5/General-Office/AA-What-is-the-cheapest-day-to-fly-on-American-irlines/m-p/67345#M9973

https://community.servicetitan.com/t5/General-Office/1-888-738-0817-What-day-are-United-flights-the-cheapest/m-p/67096#M9783

https://www.devex.com/people/what-is-the-cheapest-day-to-buy-tickets-on-expedia-1999328

https://apidocs.eightfold.ai/discuss/66fec758af91e9005afee4b1