Packing for a flight in 2026 requires a mix of legal documentation, comfort items, and tech essentials. First and foremost, you need your valid identification; for U.S. domestic flights, this must be a "REAL ID" compliant license or a passport. For international travel, you need your passport (valid for at least 6 months) and any required visas. In your carry-on, you should always pack a "24-hour survival kit" consisting of essential medications, a change of clothes, and your toothbrush in case your checked luggage is lost. Tech-wise, bring a portable power bank, as onboard USB ports are often unreliable, and noise-canceling headphones to block out engine drone. For physical comfort, a reusable water bottle (to be filled after security), an eye mask, and a light sweater are vital, as cabin temperatures are notoriously unpredictable. Don't forget the "3-1-1" liquids rule for any gels or aerosols. Finally, having digital or printed copies of your boarding pass and hotel confirmation can save you if your phone battery dies or you lose signal in a foreign airport.