Soaring is a flight technique birds use to conserve energy by utilizing rising columns of air called thermals. Seagulls can take advantage of thermals to gain altitude and soar to impressive heights. In some instances, they have been observed soaring at altitudes of up to several hundred meters (over a thousand feet).
When actively searching for food, particularly during migration or when following ships at sea, seagulls may fly even higher to get a better vantage point. Some reports suggest they can fly at altitudes of up to 1000 meters (3280 feet) or more while looking for potential food sources.
During long-distance migrations, seagulls often fly at much higher altitudes to take advantage of favorable winds and reduce energy expenditure. They can maintain these altitudes for extended periods, allowing them to cover vast distances during their migratory journeys.
It's worth noting that the maximum flight altitude of seagulls can vary based on environmental conditions, such as weather, availability of food, and predator avoidance. These tenacious birds adapt their flight patterns and altitudes based on their specific needs and circumstances.