Sit on the Right side of the plane for the best views on flights from St. Louis to London. While the takeoff offers good Mississippi River views on the left, the landing approach on the right provides more dramatic and varied scenery—the Thames estuary, London's sprawling cityscape, and the Thames valley are more visually distinctive than the relatively flat Illinois terrain. The landing experience outweighs the takeoff advantage.

During takeoff from Lambert St Louis International (STL), sit on the Left side for the best views. Left side offers views of the Mississippi River as it curves through St. Louis and the surrounding Illinois floodplain during initial climb. Right side faces inland toward less distinctive terrain. Notable sights include: Mississippi River, Gateway Arch and downtown St. Louis riverfront, Illinois floodplain and tributary valleys, Ozark Plateau foothills to the south.

When landing at Heathrow (LHR), sit on the Right side for the best views. Right side provides views of the Thames estuary, London's urban sprawl, and the approach over southern England. Left side faces toward the North Sea and offers less distinctive scenery during descent into Heathrow. Notable sights include: Thames estuary and river bends, Greater London urban area, Windsor Castle and Thames valley, Chiltern Hills to the northwest.

The flight from Lambert St Louis International (STL) to Heathrow (LHR) takes 7h 15m.

The flight path crosses the Atlantic at roughly 35,000 feet, passing over the Canadian Maritime provinces (Nova Scotia, Newfoundland), the North Atlantic open ocean, and the Irish coast before turning toward London. At cruise altitude, the Atlantic crossing offers little visible detail except occasional cloud formations and the curvature of the horizon. The approach to Ireland and the UK provides views of the Irish coastline, the Irish Sea, and Wales before the final descent into southern England.