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Airline alliances
The three big airline alliances, with the member airlines covered on cwsi.net, what each status tier gets you, and which airline statuses match.
15 of 15 members covered on cwsi.net
US programs: American AAdvantage, Atmos Rewards
Tiers: Ruby, Sapphire and Emerald
18 of 18 members covered on cwsi.net
US programs: Delta SkyMiles
Tiers: Elite and Elite Plus
25 of 26 members covered on cwsi.net
US programs: United MileagePlus
Tiers: Silver and Gold
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