According to the sources, cycling can help you burn calories and reduce belly fat, potentially leading to a flatter stomach if combined with a sensible diet. Additionally, while cycling, your abs contract isometrically to provide stability, which can help tone your abdominal muscles. However, it is worth noting that cycling alone may not be enough to achieve a flat stomach, as diet and overall exercise habits also play a role. (source: [TooCycle](https://toocycle.com/does-cycling-give-you-a-flat-stomach/))
Cycling has been known and categorized as part of an exercise above it being a good way for recreational activities.
There are so many benefits you could get from cycling such as cardio, toning muscles, weight loss, and yes it can help you achieve your fitness goal of a flatter stomach.
Cycling can help you burn up to 465 calories at an average speed of 15 miles per hour for an hour.