Boston (BOS) to Edinburgh (EDI): 3,061 miles (4,926 km) great-circle, about 6h 35m nonstop by our estimate. Cheapest fare observed: $725 round-trip on Icelandair, with 2 stops, departing May 3, 2026.
$725 round-trip, Icelandair FI632, departing 2026-05-03 at 23:00, returning 2026-05-12. The recorded itinerary left on a Sunday, returning on a Tuesday 9 nights later; the fare was observed 8 days before departure. "Book this flight" opens Kiwi.com with the same airline and dates.
At $725, it ranked 18th of the 30 round-trip fares we recorded from BOS (median $623). That is 23.7 cents per great-circle mile (round-trip price over one-way distance), above the BOS median of 19.1 cents across 30 round-trip routes.
Routes from BOS of similar length: Lisbon (3,184 mi) at $882 and London (3,256 mi) at $757.
Icelandair had the cheapest fare on 2 of 30 BOS routes. It is the 15th longest of the 30 routes we track from BOS.
Of 4 departure airports with a fare to Edinburgh, Boston (BOS) ranked 3rd at $725. Lowest: $61 from London (LGW); highest: $1203 from Nairobi (NBO); 2 nonstop. Cheapest-fare airlines (routes): British Airways (1), easyJet (1), Icelandair (1) and Qatar (1).
That depends on your passport and trip, so check the official source for United Kingdom: GOV.UK: check if you need a UK visa. Connecting elsewhere? Check that country's transit rules too.
Travelpayouts fares (cheapest per route, observed April 25, 2026); OurAirports coordinates and elevations; IANA zones America/New_York, Europe/London; flight time is our estimate.