What is the most forgotten item when traveling?

There is no single worldwide official answer, but travel surveys consistently find that a toothbrush (often along with toothpaste) is the most commonly forgotten item when traveling. Other frequently forgotten items include:

1. Toothbrush/toothpaste
2. Phone charger
3. Sunscreen
4. Deodorant
5. Hairbrush or comb
6. Underwear or socks
7. Medication
8. Travel adapters

The reason toothbrushes are forgotten so often is that people usually use them right before leaving and then forget to put them into their luggage. Surveys by travel and consumer organizations have repeatedly ranked toothbrushes and toothpaste at or near the top of the list of forgotten travel items. (AAA)

A simple packing checklist or a dedicated travel toiletry kit can greatly reduce the chance of forgetting these essentials.