As of 2026, the Elizabeth line provides a consistent and frequent service to Heathrow Airport, but the frequency varies by terminal. Specifically for Heathrow Terminal 5, trains typically run every 30 minutes (two trains per hour). This is because the Elizabeth line’s western branch splits at Hayes & Harlington, with some trains heading to Reading and others to the airport. Of the six Elizabeth line trains that serve the airport each hour, all six call at Terminals 2 & 3, four continue to Terminal 4, and only two continue to Terminal 5. If you miss the direct Terminal 5 train, you can take any Elizabeth line train to Terminals 2 & 3 and then use the free inter-terminal transfer (via the Elizabeth line, Heathrow Express, or the underground) to reach Terminal 5, though this adds about 15 minutes to your journey. In 2026, the journey from central London (e.g., Paddington or Bond Street) to Terminal 5 takes approximately 30 to 35 minutes, making it one of the most efficient ways to reach the airport, provided you time your departure to match the half-hourly direct service.