FlightAware, the widely used flight-tracking data provider, has filed a federal lawsuit against prediction market platform Kalshi, alleging the company misused its proprietary data and branding to power controversial flight cancellation contracts. How Kalshi’s flight cancellation markets fell apartKalshi, a CFTC-regulated event-contract platform, launched flight cancellation markets in July 2026. The data sourcing issue proved just as problematic: FlightAware, whose data Kalshi was apparently using to determine contract outcomes, declined to authorize that use. Kalshi withdrew the flight cancellation markets shortly after launching them. By associating FlightAware’s brand with flight cancellation betting markets, Kalshi may have created the impression that FlightAware endorsed or participated in the product.