The 10 SkyTeam carriers we track are based across 10 countries and operate roughly 2,710 aircraft between them. The largest single member here is Delta Air Lines with about 990 aircraft, which is around 37% of the alliance total in this list.
Alliance membership is a commercial arrangement rather than an operational one: the aircraft, crews and callsigns stay entirely separate, which is why a SkyTeam flight always appears on a tracker under its own airline's ICAO prefix rather than any shared code. What members share is loyalty currency, lounge access and codeshares, so the name on your ticket and the name on the aeroplane can differ. Between them these carriers concentrate on 12 major hub airports listed below.
Fleet scale in this dataset is led by Delta Air Lines, China Eastern Airlines and Air France. Together those three account for about 69% of aircraft attributed to the listed members. That concentration means a relatively small group supplies much of the alliance's physical capacity. Home countries represented here are China, France, Kenya, Mexico, Netherlands, Saudi Arabia, South Korea, Sweden, United States and Vietnam. Counts are approximate reference figures, not a live registry.
The alliance name never replaces the operating identity on a flight tracker. In this member set, the three largest examples appear as Delta Air Lines as DAL / DELTA, China Eastern Airlines as CES / CHINA EASTERN and Air France as AFR / AIRFRANS. Those ICAO prefixes and radio callsigns identify the operator even when a ticket was sold as a codeshare by another SkyTeam member.
The 12-airport hub sample spans 7 time zones. By listed annual passengers, its largest gateway is Hartsfield - Jackson Atlanta International Airport (ATL) at roughly 104.7 million. The highest field represented is Salt Lake City International Airport at 4,227 ft. These are selected member hubs from this site's airport dataset, not the alliance's complete network.