You can jump directly to a pane by typing pane's index while it is showed by `display-panes` command.
From `man tmux`:
display-panes [-t target-client]
(alias: displayp)
Display a visible indicator of each pane shown by target-client.
See the display-panes-time, display-panes-colour, and
display-panes-active-colour session options. While the indicator
is on screen, a pane may be selected with the ‘0’ to ‘9’ keys.
Or instead of typing command, you can use:
C-b q
* `C-b` send prefix key
* `q` display panes indexes