• SFGate, Sunday, February 24, 2019 3:45 PM

United Airlines offers a quasi-secretive Global Services program, a loyalty status with high-end perks and benefits. The status ranks above the four published MileagePlus tiers (Premier Silver, Gold, Platinum and 1K). American Airlines's ConciergeKey and Delta Air Lines's Delta 360 are the comparable super-secret VIP programs for those carriers. “These prestigious statuses are a bit of a mystery, and airlines are reticent to talk about them,”according to SFGate. Global Services is by invitation only and United Airlines will not detail the qualifications or benefits.

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