Niagara Helicopters runs a 12-minute loop over the falls, gorge, and Whirlpool. It costs roughly $170 per person and the booking process is straightforward.
Is it worth it? Yes, if it is your first time and the weather is clear. The aerial view of both falls together, with the Maid of the Mist and Hornblower boats looking like toys in the basin, is unlike anything you get from the ground.
No, if it is overcast, if you have flight-sickness tendencies, or if the budget is tight and you'd rather spend it on a wine tasting and a nicer dinner.
Book the first or last flight of the day — light is better, and crowds at the helipad are thinner. Sit on the right side of the helicopter for the best falls view.