Change event or venue links in The Events Calendar to the relevant website URL

link-directly-to-website-url.php

<?php

/*
 * This changes the event link to the event website URL if that is set.
 * NOTE: Comment out the add_filter() line to disable this function.
 */
function tribe_set_link_website ( $link, $postId ) {
	$website_url = tribe_get_event_website_url( $postId );
	// Only swaps link if set
	if ( !empty( $website_url ) ) {
		$link = $website_url;
	}
	return $link;
}
add_filter( 'tribe_get_event_link', 'tribe_set_link_website', 100, 2 );

Don't include the initial <?php if you're adding it to your theme's functions.php file, since it's already at the top of that file.

Any ideas on how to get the links to open in a new window?

This doesn't seem to work on the calendar view for some reason.

Edit: Seems like tribe_set_link_website isn't called on the calendar.