When it comes to frequent flyer programs, American Airlines AAdvantage and Delta SkyMiles are two of the most popular loyalty programs among U.S. travelers. While both offer perks like free flights, upgrades, and elite status, they differ significantly in how miles are earned, redeemed, and valued. This comparison guide breaks it all down so you can decide which program is better suited for your travel style.
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AAdvantage is the loyalty program for American Airlines and is part of the Oneworld alliance. Delta SkyMiles is Delta Air Lines’ loyalty program and belongs to the SkyTeam alliance.
While both programs offer global reach, AAdvantage tends to shine in international award travel with its broader partner network, while SkyMiles offers more domestic U.S. coverage and a user-friendly experience.
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AAdvantage members earn Loyalty Points based on dollars spent rather than distance flown, making credit card spending a core component of progress toward elite status.
Delta SkyMiles uses a similar revenue-based system, but earnings from Delta’s Amex credit cards tend to be stronger for everyday spenders.
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AAdvantage still offers award charts for partner redemptions, which can result in great value—especially for international premium cabins.
SkyMiles removed award charts and uses dynamic pricing, which means award flight costs fluctuate and can be unpredictable.
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AAdvantage has four elite tiers: Gold, Platinum, Platinum Pro, and Executive Platinum. Earning elite status requires Loyalty Points, which are earned from flights and qualifying spending.
Delta Medallion Status includes Silver, Gold, Platinum, and Diamond. Delta's elite system is based on Medallion Qualification Dollars (MQDs), with a strong emphasis on high-spend travel.
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American Airlines is part of the Oneworld alliance, which includes British Airways, Qatar Airways, Japan Airlines, and others.
Delta belongs to SkyTeam, partnering with Air France, KLM, Korean Air, and more.
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AAdvantage is partnered with Citi and Barclays, offering several co-branded cards with generous bonus miles and perks like free checked bags and priority boarding.
Delta is partnered with American Express, and its suite of SkyMiles cards provides earning bonuses, lounge access, and an easier path to Medallion status.
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AAdvantage miles expire after 24 months of inactivity, though you can reset the clock by earning or redeeming miles.
SkyMiles never expire, which is a clear advantage for infrequent travelers who want long-term value.
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Delta consistently ranks higher in customer satisfaction, especially for on-time performance and in-flight service.
American Airlines has improved its in-flight offerings and Wi-Fi, but customer service experiences can vary.
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There’s no one-size-fits-all answer—AAdvantage may be ideal if you:
Fly internationally often
Want access to Oneworld partners
Like predictable award charts
Delta SkyMiles may be better if you:
Prefer flexible redemptions
Travel mainly within the U.S.
Already use Amex credit cards
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