FlightAware has sued Kalshi, according to a report from The Block. The lawsuit centers on claims that Kalshi used FlightAware’s flight tracking data without permission. Kalshi allegedly relied on this data to create and operate markets tied to flight cancellations.
FlightAware is a widely used aviation data company. It tracks flight status, delays, and cancellations across commercial and private aviation. Airlines, airports, and travel technology firms license its data for operational and consumer-facing uses. The company has built its business around real-time flight information, which it treats as a proprietary and commercially valuable asset.
Kalshi is a regulated prediction market platform. It allows users to trade contracts tied to the outcome of real-world events. The company has expanded rapidly beyond traditional financial and political markets. It now offers contracts on weather, sports, and other event categories. Flight cancellation markets would fit into this broader push to diversify event-contract offerings.
The dispute highlights a recurring tension in the prediction market industry. Platforms need reliable, real-time data to settle contracts accurately. Data providers, meanwhile, want compensation when their information underpins commercial products. When a data source feeds into a tradable market, questions about licensing terms and usage rights become central to any legal review.
FlightAware’s claim suggests it did not authorize Kalshi to use its data for this purpose. The details of any licensing agreement, or the absence of one, will likely shape how the case unfolds. Courts weighing similar data disputes have often focused on whether a company’s terms of service explicitly restrict commercial redistribution or derivative use.
Kalshi has drawn regulatory attention before. As a platform regulated by the Commodity Futures Trading Commission, it has faced scrutiny over the scope of markets it can legally offer. Disputes with data providers add another layer of complexity to its expansion strategy. The company has pushed into areas that go beyond conventional financial instruments, drawing both interest and pushback from incumbents in adjacent industries.
The outcome of this lawsuit could influence how other prediction market operators approach data sourcing going forward. Platforms that build event markets around specialized data, whether in aviation, weather, or sports, may need to secure explicit licensing agreements before launching related contracts. Failing to do so could expose them to similar legal challenges.
Neither company’s specific arguments beyond the core allegation have been detailed in available reporting. The case is still in its early stages. Further filings are expected to clarify the scope of the claims and any potential damages sought by FlightAware.
Sources disagree on this story
This article was published before the reports below were compared. The reporting above stands; what follows is where the published accounts do not agree.
Reports agree on the substance of FlightAware's lawsuit against Kalshi but disagree on the date the complaint was filed, per Cryptopolitan and The Cryptonomist EN.
What all sources agree on
- FlightAware sued Kalshi over flight-cancellation prediction markets, alleging unauthorized use of its data and name.
- The lawsuit was filed in the U.S. District Court for the Southern District of New York.
- The complaint alleges breach of contract, trademark infringement under the Lanham Act, and unfair competition.
- FlightAware is seeking a temporary restraining order along with preliminary and permanent injunctions.
- Kalshi's contracts stated outcomes would be 'verified from FlightAware.'
- FlightAware's complaint states: 'Kalshi never informed FlightAware that it would rely on FlightAware's data to determine the outcome of these betting markets.'
- FlightAware raised safety concerns that the markets could incentivize unsafe attempts to influence flight cancellations.
- Kalshi's contract rules exclude payouts for cancellations caused by malicious acts or security-related disruptions.
- The lawsuit follows New York's separate suit against Kalshi over alleged unlicensed gambling.
Where the reports disagree
1Date the complaint was filed
FlightAware filed its complaint August 10 in the U.S. District Court for the Southern District of New York, docketed as FlightAware LLC v. Kalshi Inc.
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
What would settle it: The SDNY court docket entry for FlightAware LLC v. Kalshi Inc., which would show the official filing date.
What to make of it
Treat the substance of the lawsuit — the claims, the relief sought, and the quoted language from the complaint — as established across sources; the exact filing date (August 10 vs. August 11) remains unresolved and should not be treated as settled until the court docket is checked.
Market Impact
For Kalshi, the lawsuit introduces legal uncertainty around a product category it has used to broaden its market offerings. If the flight cancellation markets are forced to pause or shut down, it could slow the platform's diversification efforts.
More broadly, the case may prompt other prediction market platforms to review their data licensing arrangements. Firms that supply specialized real-time data, such as flight, weather, or sports information, could see this dispute as a signal to tighten enforcement of their usage terms with market operators.
The lawsuit underscores the friction that can arise when prediction markets rely on third-party data to structure new contract categories. How the dispute resolves may set an early precedent for data licensing practices across the growing event-contract industry.
Frequently Asked Questions
What is the lawsuit about?
FlightAware alleges that Kalshi used its flight tracking data without authorization to create and run markets on flight cancellations.
What is Kalshi?
Kalshi is a regulated prediction market platform that lets users trade contracts based on the outcomes of real-world events, including weather and sports.
What does FlightAware do?
FlightAware provides flight tracking data, including information on delays and cancellations, which it licenses to airlines, airports, and other businesses.
Has Kalshi responded to the allegations?
Available reporting does not include a detailed public response from Kalshi regarding the specific claims in the lawsuit.
Could this affect other prediction market platforms?
The case may encourage other operators to review data licensing agreements before launching markets that depend on specialized third-party information.