As a founding member of the SkyTeam alliance, Delta Air Lines has a well-connected route network with other airlines around the globe, allowing Delta loyalists to earn and redeem Delta miles even when flying with other airlines that aren't actually Delta.

Delta Air Lines is a founding member of the SkyTeam alliance, not Oneworld. Established in June 2000, SkyTeam was created as a strategic partnership between Delta, Aeroméxico, Air France, and Korean Air to compete with the Star Alliance and Oneworld. As of 2026, Delta remains the dominant North American anchor for SkyTeam, providing its passengers with seamless connections to a global network of partner airlines including KLM, Virgin Atlantic, and Middle East Airlines (MEA). This membership is highly beneficial for travelers because it allows SkyMiles members to earn and redeem miles across all partner carriers and provides "SkyPriority" perks (like priority boarding and lounge access) to elite status holders regardless of which alliance airline they are flying. Oneworld, on the other hand, is the rival alliance anchored by American Airlines and British Airways. For a traveler or aviation researcher, it is vital to keep these distinctions clear, as your frequent flyer benefits and "codeshare" options are strictly limited to the carriers within the SkyTeam ecosystem.