Redirect to event page after checking out in WooCommerce

example.php

<?php

add_action( 'woocommerce_thankyou', function( $order_id ){

    $order = wc_get_order( $order_id );
    $has_tickets = get_post_meta( $order_id, '_tribe_has_tickets', true );

    if ( empty( $has_tickets ) || ! $has_tickets ) {
        return;
    }

    $items = $order->get_items();
    $event = false;

    foreach ( $items as $item ) {
        $product_id = $item->get_product_id();
        $event = get_post_meta( $product_id, '_tribe_wooticket_for_event', true );

        if ( ! empty( $event ) ) {
            break;
        }
    }

    if ( ! $order->has_status( 'failed' ) && $event ) {
        wp_safe_redirect( get_permalink( $event ) );
        exit;
    }
});

Note that a WooCommerce order can have tickets from multiple events. This will redirect to the event from the first ticket product encountered in the order.