The "Fly the Friendly Skies" campaign was a long-running and well-known advertising slogan used by United Airlines. This campaign was associated with the airline for many years, emphasizing the idea of friendly and comfortable air travel.

The campaign's slogan, "Fly the Friendly Skies," was used to convey the idea that United Airlines provided a positive and enjoyable flying experience for its passengers. It aimed to emphasize the friendly and welcoming service that passengers could expect when traveling with the airline.

While the slogan became iconic for United Airlines, it's worth noting that the airline industry is dynamic, and marketing campaigns evolve over time. I do not have access to information about the most recent marketing campaigns or slogans used by United Airlines. The airline did have introduced new campaigns or messaging since then.

To learn more about United Airlines' current marketing initiatives and campaigns, we'd recommend visiting their official website or referring to their latest marketing materials and announcements.