Jet Lag SymptomsSearch for around the world ticketFAQ: How do I use this trip planner?Start by typing your departure city in the box above. Suggestions will appear as you type.Drag and drop destinations to change the order of your trip.Your return city can be the same as your starting city, or you can change it.After adding your cities, click Next to continue planning your trip.Jet lag symptoms are varied – and none of them are fun. Irrationality, disorientation, tiredness, dehydration, sore legs and feet and poor sleep are all nasty side-affects to long flights.