Contact Lenses Need Backup GlassesSearch 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.Contact lenses-wearers should bring a pair of glasses as back up. Glasses give your eyes a break and if you’re eyes are irritated, you’re not totally out of luck.