In 2026, sleeping at Heathrow Terminal 2 is possible but comes with significant logistical caveats. The terminal is technically open 24 hours, but the "airside" (secure) area generally closes between 11:00 PM and 4:00 AM. If you are already inside, security may allow you to stay in a designated quiet zone, specifically near Gates B31-B49, which are known for being more secluded. However, if you are arriving late for a flight the next morning, you will likely be restricted to the "landside" (public) arrival or check-in areas. These areas feature hard seating and bright lights, making quality sleep difficult. For a more comfortable experience, the Plaza Premium Lounge on Level 4 offers private "nap rooms" for a fee, and the Aerotel is a dedicated transit hotel located right inside the terminal. If you opt for the floor or benches, expect regular security patrols to check your passport and boarding pass to ensure you are a legitimate traveler and not a loiterer.