The flight distance from London Heathrow Airport (LHR) in London, United Kingdom to Union Island International Airport (UNI) in Union Island, Saint Vincent is 6,920 kilometers (4,300 miles / 3,737 nautical miles). The estimated flight time for this route is approximately 9h, flying west southwest at a heading of 255°.

This is a long-haul route typically operated by wide-body aircraft such as the Boeing 777 or Airbus A350. Full meal service, in-flight entertainment, and comfort amenities are standard.

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

Time zone information: When it's 03:18 in London, it's 23:18 in Union Island. The 4-hour time difference may cause some jet lag. Most travelers adjust within a day or two.

The return flight from Union Island (UNI) to London (LHR) follows a heading of 38° (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 London Heathrow Airport (LHR) and Union Island International Airport (UNI) detail pages, or use our flight duration calculator to compare other routes.