Can I play my iTunes library from my phone on Sonos if I'm not an Apple Music member?

Hello chazz678!

Thanks for using the Apple Support Communities!

I see from your post that you are wondering if you can play your iTunes music library on your Sonos speaker, even if you're not an Apple Music Member.

If your Sonos speaker is AirPlay compatible, you can play any saved music on your iPhone on the speaker.

Check out how to use AirPlay audio in this resource called How to AirPlay audio.

I hope this information helps!

Kindest Regards.

You don't need AirPlay. Launch the Sonos app. See this article : https://www.imore.com/how-set-and-use-sonos-controller-app-iphone-and-ipad