flycheck-title lets you view flycheck messages in the frame title, keeping the minibuffer free for other things.
Flycheck shows errors in the minibuffer by default. However, if you're also using eldoc, you can get flicker:
An alternative is flycheck-pos-tip, which shows the errors in a pop-up. This can be problematic when you're using completion pop-ups:
Install from MELPA, then add the following to your Emacs configuration:
(with-eval-after-load 'flycheck (flycheck-title-mode))