A gentle neck circle to both sides can really alleviate tension in the shoulders and neck which tends to build up after travelling and from stressful situations.
BALASANA - Childs Pose
This pose is no doubt every yogi's best friend. The release in the lower back, gentle forward fold and opening in the hips allows for more space to be created in the body all the while invoking the parasympathetic nervous system which helps the body to calm and destress. Airports, check in and security can sometimes leave you a little flustered and don't even get me started on the baby food and milk situation (almond milk alternative doesn't always count as baby milk FYI). My point being that your flight and flight responses are probably more likely to be triggered in these types of situations no matter how yogified we try to be. This pose is the answer, believe me!
This movement from all fours, arching the back to rounding the back really creates some nice space in the spine. Remember to keep the the core gently activated even when arching the back. Use your breath to flow from cat to cow moving with your own rhythm.