During the 1940s, Hawkman was featured in every Flash Comics issue until it ended at issue No. 104. During the series, Hawkman and Flash took turns being featured on the cover for almost the entire run. There is a YouTube channel called Comic Collector Geek, where the collector talks about his vintage comic collection, and he talks about this a bit.
In a video released on October 9, 2025, he talks about how the covers feauring Hawkman sold better than the Flash covers and gives his reasons why. Pretty interesting. It's brief, but it starts at about the 6:15 mark.
Thanks to u/kurumais for posting this on Hawkworld Reddit!
