<div class="messageWell well">
  <p class="text-info">
    <strong>To plan a trip:</strong> select a start and end location by clicking the map or by entering an address above.
  </p>
</div>
<div class="itineraries"></div>

<div class="messageWell well">
  <span class="text-info">
    <strong>To plan a trip:</strong> select a start and end location by clicking the map or by entering an address above.
  </span>
</div>
<div class="itineraries"></div>

Use a span instead of a p for equal margins in the well
Use a span instead of a p for equal margins in the well
