<P> The fourth season began airing on October 10 , 2017 , and ran for 23 episodes on The CW until May 22 , 2018 . </P>
<P> The fourth season began airing on October 10 , 2017 , and ran for 23 episodes on The CW until May 22 , 2018 . </P>
how many episodes of flash season 4 will there be
how many episodes of flash season 4 will there be
23
23