This hook allows you to add your custom text just below the trip title and above the trip price.

Source

File : /inc/template-functions.php

Example :

function prefix_wp_travel_single_before_trip_price() {
    esc_html_e( 'This is the content added using this hook', 'text-domain' );
}
add_action( 'wp_travel_single_before_trip_price', 'prefix_wp_travel_single_before_trip_price'  );