Sit on the Right side of the plane for the best views on flights from Ontario to Washington. While takeoff favors left for mountain views, the landing approach over Washington's iconic monuments and the Potomac River is the flight's visual highlight. Right-side seats capture the most recognizable landmarks of the entire journey.

During takeoff from Ontario International (ONT), sit on the Left side for the best views. ONT typically departs westbound (Runways 26L/26R). Left-side seats face north during climb-out, offering views of the San Gabriel Mountains and the Los Angeles basin sprawl. Right seats look south toward the Inland Empire's flat terrain. Notable sights include: San Gabriel Mountains (north), San Bernardino Mountains (northeast), Los Angeles urban grid (northwest), Cajon Pass (distant northeast).

When landing at Ronald Reagan Washington National (DCA), sit on the Right side for the best views. DCA uses Runways 01/19 depending on wind. Eastbound approaches (Runway 01) descend from the west over the Potomac River and central Washington. Right-side seats face north, showing the National Mall, Capitol Building, and Potomac River landmarks. Left seats see Arlington and Virginia suburbs. Notable sights include: Potomac River (immediate), National Mall and Capitol Building (center), Washington Monument (distinctive), Lincoln Memorial and Tidal Basin (west side).

The flight from Ontario International (ONT) to Ronald Reagan Washington National (DCA) takes Approximately 4 hours 15 minutes.

The flight path crosses the Appalachian Mountains (visible around 2 hours into flight as a series of parallel ridges running northeast-southwest through Pennsylvania and West Virginia), the Ohio River valley, and the Shenandoah Valley. The Appalachians are the most dramatic midpoint feature, appearing as distinct ridge-and-valley topography. The flight typically cruises at 35,000 feet where these features appear as subtle terrain variations on the horizon.