Filter and display a specific custom field value [closed]

Now with the new information I would go with this:

?>
<form method="post" action="where_ever_you_want_to_point_the_user_afterwards.php">
/* The loop: */
  if (the_field('departures') == 'user_departure_location') {
   <input type="radio" name="destination" value="<?php echo the_field('destination'); ?>">
   <a href="https://wordpress.stackexchange.com/questions/154925/<?php the_permalink(); ?>">
     Destination: <?php the_field('destination'); ?>
     Departing from:<?php the_field('departures'); ?>
     Price:<?php the_field('price'); ?>
   </a>
  }

/* The loop end */
?></form>

And then on where_ever_you_want_to_point_the_user_afterwards.php you can check which selection he made by doing the following or something, which you prefer.

switch ($_POST["actual_name_of_destination_in_the_form"]) {
  case 'Dallas':
   /* Whatever should happen next */
  break;

  /* Many more cases of course... */
} 

---

Update:
I have found a much nicer way of doing the filter bit… silly me 😀

$args = array(
   'post_type' => 'travel_packs',
   'meta_key' => 'departures', 
   'meta_value' => 'USER_DEPARTURES_LOCATION'
   'order' => 'ASC',
);
$query = new WP_Query( $args );

Cheers!