The flight distance from Cat Bi International Airport (HPH) in Haiphong, Vietnam to London Heathrow Airport (LHR) in London, United Kingdom is 9,331 kilometers (5,798 miles / 5,038 nautical miles). The estimated flight time for this route is approximately 12h, flying northwest at a heading of 323°.

This is an ultra-long-haul route, one of the longest in aviation. It requires wide-body aircraft with extended range capability such as the Airbus A350-900ULR or Boeing 777-200LR. Passengers should prepare for an extended flight with multiple meal services.

This is an international route connecting Vietnam with United Kingdom. It is an intercontinental flight between Asia and Europe. Travelers should check visa requirements, customs regulations, and any travel advisories before booking.

Time zone information: When it's 06:42 in Haiphong, it's 00:42 in London. With a 6-hour time difference, travelers should plan for significant jet lag. It typically takes one day per hour of time difference to fully adjust.

The return flight from London (LHR) to Haiphong (HPH) follows a heading of 64° (east northeast). Actual flight times may vary depending on wind conditions, air traffic, and the specific aircraft used.

For more information about these airports, visit the Cat Bi International Airport (HPH) and London Heathrow Airport (LHR) detail pages, or use our flight duration calculator to compare other routes.