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FlightAware sues Kalshi over flight-cancellation markets

By Thomson Reuters Aug 11, 2026 | 2:04 AM

Aug 11 (Reuters) – Flight-tracking service FlightAware is suing prediction markets giant Kalshi accusing the company of using its data and name to run “gambling markets on flight ​cancellations” without permission.

• In July, Kalshi announced markets allowing ‌customers to bet on flight-cancellation risk. The plans drew criticism over concerns that the markets could create financial incentives for people to disrupt air travel or cause airport closures.

• FlightAware said Kalshi had named it ‌as ​the primary source agency for the markets’ ⁠settlement, but that it ⁠had not authorized Kalshi to use its name, data or trademarks for that purpose.

• Kalshi’s unauthorized use of FlightAware’s data and name meant customers assumed FlightAware was involved ​in the scheme, lawyers for the flight-tracking company wrote in the complaint filed in the U.S. District Court for ⁠the Southern District of New York ⁠on Monday.

• Kalshi did not immediately respond to ​a Reuters’ request for comment outside of business hours.

• The “US ​flight cancellations for the week ending at 5pm EDT ‌on 8/14” contract was available on Kalshi’s website at the time of reporting, Reuters’ checks showed. The listing stated: “Outcome verified from FlightAware.”

• Prediction markets such as Kalshi and Polymarket have ⁠soared in popularity since the 2024 U.S. presidential election, when they fared better than pollsters in predicting Republican Donald Trump’s victory over ⁠Democrat Kamala Harris.

• ‌Polymarket and Kalshi allow traders and gamblers ⁠to bet on a wide array of ​events, ranging ‌from the results of sports matches to ​elections and ⁠even on events related to the wars in Iran and Ukraine.

• FlightAware is seeking unspecified damages, as well as court orders barring Kalshi from using its data and name. It also seeks a jury trial.

(Reporting by Preetika Parashuraman in Bengaluru; Editing ​by Lincoln Feast.)