Thai 601 to Bangkok. TKO can be the acronym for Technical Knockout, a term in boxing, or Tseung Kwan O, a bay or its adjacent town in Hong Kong.
<a href="//commons.wikimedia.org/wiki/User:N509FZ" title="User:N509FZ">N509FZ</a>
<span class="int-own-work" lang="en">Own work</span>