A flight-tracking company best known for helping travelers check on delayed planes is now suing one of the fastest-growing prediction market platforms in the country. FlightAware filed a lawsuit against Kalshi on August 11, 2026, accusing the trading platform of using its data without permission to settle bets on flight cancellation prediction markets, and of making it look like the two companies had struck a partnership that never existed.
Summary
Key takeaways
- FlightAware sued Kalshi on August 11, 2026, alleging unauthorized use of its flight-tracking data and brand for cancellation-betting contracts introduced last month.
- The complaint accuses Kalshi of breach of contract, trademark infringement, and unfair competition, and seeks a temporary restraining order plus preliminary and permanent injunctions.
- FlightAware warns that betting on flight cancellations could create incentives for unsafe attempts to influence whether a flight operates, though no interference has been proven.
- Kalshi is separately fighting a $36 billion lawsuit from New York over alleged unlicensed gambling, plus conflicting rulings in Washington, Michigan, and Minnesota.
- A Minnesota federal judge blocked enforcement of a state ban against CFTC-registered markets on July 27, while Washington and Michigan courts have sided with regulators.
FlightAware’s Lawsuit Over Kalshi’s Flight Cancellation Markets
FlightAware’s complaint centers on a simple but consequential accusation: Kalshi built a betting product on top of FlightAware’s data without ever asking for permission to do so. The dispute involves markets Kalshi launched last month that let traders take positions on whether specific flights will be canceled, turning real-world flight status into a tradable outcome.
Unauthorized Use of Data and Branding
According to the filing, Kalshi tells users that contract outcomes are “verified from FlightAware,” language that FlightAware says it never approved. The company said it was not told beforehand that its tracking data would determine whether traders collected a payout. “Kalshi never informed FlightAware that it would rely on FlightAware’s data to determine the outcome of these betting markets,” the company wrote in its complaint. Beyond the mechanics of settlement, FlightAware argues the branding itself created a false impression among customers that the two companies had teamed up, raising reputational concerns for a firm whose core business tracks commercial and private aviation rather than gambling markets.
Breach of Contract, Trademark, and Unfair Competition Claims
The lawsuit lays out three distinct legal theories: breach of contract, trademark infringement, and unfair competition. FlightAware is asking the court for a temporary restraining order along with preliminary and permanent injunctions that would bar Kalshi from using its data feed and brand name in connection with the disputed flight-cancellation contracts. Notably, this case takes a different legal path than Kalshi’s other regulatory headaches. It’s not about whether the contracts are gambling under state law — it’s about whether Kalshi had any right to use FlightAware’s product and name in the first place.
Safety Concerns Raised by Flight Cancellation Prediction Markets
FlightAware’s complaint goes further than contract law, raising a safety argument that could resonate well beyond the courtroom. The company says letting people profit from flight cancellations creates financial incentives that could, in theory, push someone to try to influence whether a flight actually gets canceled.
Kalshi already excludes payouts tied to cancellations caused by malicious acts or security disruptions, according to the lawsuit. Even so, FlightAware expressed concerns about “extensive public disapproval and worry” that such agreements might promote risky conduct intended to influence flight schedules, arguing such conduct could “strand travelers, disrupt airline operations, and threaten safety.” Importantly, the complaint does not claim that any trader has actually interfered with a flight to win a payout — the argument is about incentive structure, not documented misconduct. Still, the concern illustrates a broader tension as Kalshi’s event contracts push into sports and other real-world outcomes far removed from traditional financial or political betting markets, where the consequences of a wrong prediction are purely monetary rather than tied to public safety.
Kalshi’s Wider Regulatory Battles on Prediction Markets
The FlightAware case lands on top of a stack of unresolved legal fights that already had Kalshi playing defense in multiple states. Together, these disputes show how unsettled the legal footing for prediction market regulation remains, with federal and state authorities pulling in opposite directions.
New York’s $36 Billion Gambling Lawsuit
On July 31, New York’s Attorney General Letitia James joined Governor Kathy Hochul in filing legal action against Kalshi, alleging that the platform running an unlicensed gambling business in the state. New York is seeking at least $36 billion in damages, penalties, and related relief, and is also asking a court to halt the disputed contracts entirely. The complaint alleges Kalshi made available event contracts in the absence of proper state gaming authorization and permitted individuals aged 18 through 20 to trade, despite New York requiring bettors to be at least 21 for mobile sports betting. State investigators say they opened accounts and completed transactions on the platform as part of their probe.
Conflicting State Court Rulings
Court decisions across the country have produced no single answer on how these contracts should be classified. In Washington, a judge granted a preliminary injunction on July 21 restricting Kalshi’s sports event contracts, rejecting the company’s argument that the Commodity Exchange Act shields it from state gambling enforcement. Michigan delivered a similar blow on August 6, when U.S. District Judge Shalina Kumar denied Coinbase Financial Markets’ request for preliminary relief against state sports-betting laws. Kalshi itself got caught in the middle in Michigan earlier in July, when a state court ordered restrictions on its sports contracts while the CFTC separately directed the company not to unwind trades — leaving Kalshi, in its own words, trying to comply with competing state and federal requirements at the same time.
Minnesota Blocks Ban, Highlighting Federal-State Divide
Minnesota tells a different story. A federal judge blocked enforcement of the state’s prediction-market ban on July 27, protecting Kalshi, Polymarket US, and other CFTC-registered markets while litigation continues. Judge Katherine Menendez found the plaintiffs were likely to succeed on part of their federal preemption argument, though she stopped short of ruling that every contract these platforms offer automatically qualifies for federal protection — noting that different types of event contracts may require separate legal analysis going forward.
That split outcome captures the core of the fight: the Commodity Futures Trading Commission holds that derivatives traded on registered prediction-market exchanges fall under its jurisdiction via the Commodity Exchange Act, putting it on a collision course with states trying to apply gambling rules to sports-related contracts. The CFTC has pursued related complaints touching Wisconsin, Illinois, Arizona, Connecticut, New York, New Mexico, Minnesota, and Rhode Island. Why does this matter beyond Kalshi? Because until courts or Congress settle whether event contracts are derivatives or bets, every new product category — including flight cancellation prediction markets — risks landing in the same legal gray zone, forcing platforms to navigate a patchwork of rulings state by state.
FlightAware’s case stands apart from that jurisdictional battle precisely because it isn’t arguing about gambling law at all. It’s a dispute over data rights and branding — a reminder that as prediction markets expand into new real-world categories, the companies whose data powers those markets may have their own claims to make, independent of whatever regulators decide about gambling classification.
FAQ
Why is FlightAware suing Kalshi?
FlightAware alleges Kalshi used its flight-tracking data and brand without permission for flight cancellation prediction markets, leading to breach of contract and trademark infringement claims.
What safety concerns does FlightAware raise about Kalshi’s markets?
FlightAware argues that betting on flight cancellations could incentivize unsafe behavior to influence flights, although no interference incidents have been proven.
What regulatory challenges is Kalshi facing besides the FlightAware lawsuit?
Kalshi faces lawsuits and regulatory actions in states like New York for unlicensed gambling, with conflicting court rulings in several states and ongoing disputes over federal versus state jurisdiction.
How have courts differed in ruling on Kalshi’s prediction markets?
Washington and Michigan courts have restricted Kalshi’s contracts under state gambling laws, while a Minnesota court blocked enforcement of a state ban citing federal preemption.
Article produced with the assistance of artificial intelligence and reviewed by the editorial team.
