Mastering Connections at Europe’s Busiest Airport
London Heathrow Airport (LHR) handles over 80 million passengers annually. For international transit passengers connecting between British Airways, Virgin Atlantic, American Airlines, or Star Alliance carriers, switching between Terminal 2, Terminal 3, Terminal 4, and Terminal 5 requires strategic planning.
Understanding Heathrow’s Terminal Layout
- Terminal 2 (The Queen’s Terminal): Star Alliance carriers (Lufthansa, United, Singapore Airlines, Air Canada).
- Terminal 3: Oneworld carriers (American Airlines, Cathay Pacific, Qantas, Emirates).
- Terminal 4: SkyTeam & independent carriers (Qatar Airways, Etihad, Air France, KLM).
- Terminal 5: Main hub for British Airways and Iberia.
How Flight Connections Work at LHR
If your baggage is checked through to your final destination, you do not need to enter the UK or clear customs. Follow the purple "Flight Connections" signs to board the free airside shuttle buses connecting all terminals.
Real Transit Times Between LHR Terminals
- T2 to T3: 10-minute airside pedestrian walkway.
- T5 to T3 / T2: Airside shuttle bus (15-20 minutes travel time + security rescreening).
- T4 to T5: Airside shuttle bus (20-25 minutes).
Check terminal assignments and transit rules using our Airport Terminal Finder.
Minimum Connection Time (MCT) Advice for LHR
While official airline MCT at Heathrow ranges between 60 to 90 minutes depending on terminals, experienced travelers recommend booking at least 90 minutes for same-terminal transfers and 120 minutes for inter-terminal transfers.