Seven major U.S. airlines, including the “Big Four” U.S. airlines – American Airlines, Delta Air Lines, United Airlines, and Southwest Airlines — have been facing legal drama driven by massive class-action lawsuits.
According to a report in SimpleFlying, the seven major U.S. airlines have been accused of price fixing and using a common system to monitor ticket prices and coordinate fare adjustments.
In early November, ATPCO (Airline Tariff Publishing Company) was named in two proposed class-action lawsuits.
The first one, Ward v. ATPCO, was filed on November 4, 2026, in the U.S. District Court for the Western District of Washington in Seattle. Along with American Airlines, Southwest Airlines, United Airlines and Delta Airlines, it named Hawaiian Airlines, JetBlue and Alaska Airlines as defendants along with ATPCO.
The second lawsuit, Brown v. ATPCO, was filed in early November 2026 in federal court in Virginia and targets ATPCO, 3Victors, and a subset of carriers over similar antitrust violations.
Continue reading for more details.
Details on why major U.S. Airlines and ATPCO were sued in two recent lawsuits
Major U.S. airlines and ATPCO are facing two high-profile lawsuits that were filed in early November. These airlines are accused of using a shared data hub to keep a tab on one another’s prices and maintain high domestic costs for their passengers.
The lawsuit, filed on November 4, 2026, in the U.S. District Court for the Western District of Washington, was brought by airline passengers Ashley Ward of Temecula, California, and Gregory Morris of Rockaway, New Jersey. The suit described ATPCO as “a highly sophisticated information exchange” that allows airlines to track one another’s pricing and “artificially inflate the cost of air travel.”
The complaint reads:
“If an airline could offer a traveler a private discount that its rivals could not see in ATPCO’s database, those rivals could not immediately retaliate. The old system of public fare filings — the bedrock airlines had long used to monitor one another and maintain a cooperative equilibrium — would collapse.”
Another lawsuit was filed on November 3, 2026, in the U.S. District Court for the Eastern District of Virginia, Alexandria Division. It named ATPCO, 3Victors, American, Delta, Southwest, Alaska, and JetBlue. Both lawsuits claim violations of Section 1 of the Sherman Act and seek triple damages and a court order ending the alleged data exchange.
The defendants have not yet filed formal answers or motions to dismiss in court. But initial responses and public statements from the companies have emerged. American Airlines is the only airline to issue a public denial so far.
A report published in The Daily Chronicle stated that a spokesperson for American Airlines spoke about the lawsuit and said:
“We operate in a highly competitive industry that has delivered tremendous value to consumers, and we take compliance with antitrust laws very seriously. We develop and price our products independently, compete every day to win customers and categorically reject any suggestion that our prices are anything other than independent and competitive.”
Other major airlines, including Delta Air Lines, United Airlines, Southwest Airlines, Alaska Airlines, JetBlue, and Hawaiian Airlines, have either declined to comment on the active litigation or could not be immediately reached.
A report in Travel Weekly stated that ATPCO has denied the allegations and plans to defend itself in court. A spokesperson from the company told the outlet:
“We plan to defend ourselves vigorously against them.”
ATPCO faced a similar lawsuit decades earlier. A report published in Travel Weekly notes that in 1992 the Justice Department sued ATPCO and eight domestic airlines, under the same Sherman Act provision, alleging the platform was used to signal and coordinate price increases.
Reportedly, the Justice Department resolved the case by entering into a consent decree which restricted certain practices. It mandated that ATPCO could only share information that was already publicly available. But those decrees have since expired.
The November 2026 class-action lawsuits against ATPCO and major U.S. airlines differ from the 1992 DOJ case in technology, the type of exchanged data, and who brought the action. As per Travel Weekly, the 1992 lawsuit was centred on an alphabet-coded fare system, which is still widely used by GDSs.
The 2026 lawsuits, by contrast, are centred on dynamic pricing and real-time digital analytics. The new suits allege that airlines use modern data-sharing tools, specifically Iris and PriceEye.
