The flight distance from General Edward Lawrence Logan International Airport (BOS) in Boston, United States to Milford Sound Airport (MFN) in Milford Sound Airport, New Zealand is 15,362 kilometers (9,545 miles / 8,295 nautical miles). The estimated flight time for this route is approximately 19h, flying west southwest at a heading of 246°.

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 United States with New Zealand. It is an intercontinental flight between North America and Oceania. Travelers should check visa requirements, customs regulations, and any travel advisories before booking.

Time zone information: When it's 02:37 in Boston, it's 20:37 in Milford Sound Airport. With a 18-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 Milford Sound Airport (MFN) to Boston (BOS) follows a heading of 72° (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 General Edward Lawrence Logan International Airport (BOS) and Milford Sound Airport (MFN) detail pages, or use our flight duration calculator to compare other routes.