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London Heathrow Airport, one of the world's busiest, serves as a hub for long-haul flights across six continents. In January 2025, six routes stand out as the longest non-stop flights departing from this major international gateway.
The sixth-longest route connects London Heathrow (LHR) with Taipei (TPE), covering 6,090 miles. China Airlines operates 18 flights each way in January using its Airbus A350-900 aircraft. The eastbound journey takes approximately 13 hours.
Ho Chi Minh City (SGN) ranks fifth on the list at 6,356 miles. Vietnam Airlines flies this route 13 times in each direction during January with its Boeing 787-9 aircraft. The airline also offers connections to Hanoi from London Heathrow.
