Sit on the Right side of the plane for the best views on flights from Boise to London. While the takeoff from Boise offers excellent mountain scenery on the left, the landing approach into Heathrow from the right seat provides more sustained and dramatic views—the Thames Valley, London's sprawl, and the airport approach itself. Right seat wins overall for the longer, more visually rewarding segment.

During takeoff from Boise Air Terminal (BOI), sit on the Left side for the best views. Left seat offers immediate views of the Boise Foothills and the Boise Valley floor as you climb out. The terrain rises steeply to the northeast, creating dramatic relief against the relatively flat valley. Notable sights include: Boise Foothills (northeast), Boise Valley floor (immediate vicinity), Bogus Basin ski area (north, visible on clear days), Owyhee Mountains (south, distant).

When landing at Heathrow (LHR), sit on the Right side for the best views. Right seat provides the best views during the final approach into Heathrow. The descent path typically brings you over the Thames Valley and Greater London from the west, so right-side passengers see the Thames River, London's urban sprawl, and the approach corridor over suburban Berkshire and Surrey. Notable sights include: Thames River (winding through the frame), Greater London urban area (dense development), Heathrow Airport runways and taxiways (immediate foreground on approach), Windsor Castle area (visible to the southwest on clear days).

The flight from Boise Air Terminal (BOI) to Heathrow (LHR) takes 9h 45m.

Northern Rocky Mountains (Montana/Idaho border region), Canadian Prairies (Alberta/Saskatchewan), Hudson Bay (northern Canada), Greenland's eastern coast and glaciated terrain, North Atlantic Ocean, Iceland (possible sighting on northern routing), Scottish Highlands and lochs, Lake District (UK), Thames Valley approach to London