At Denver International Airport (DEN) British Airways DEN Terminal is based out of Terminal West. Check-in is on Level 6 of the Jeppesen Terminal. Travelers can enter TSA security close to Door 600, check in, and drop off their bags. Travelers can fly to London Heathrow (LHR) with British Airways. Make sure to visit the official British Airways website to verify flight schedules and any updates prior to departure.