Travelers have jumped on board a class action complaint aimed at United Airlines over claims that the company pockets an illegal kickback from third-party insurers featured on its website. 

The consumers claim they would not have paid the artificially inflated travel insurance prices of Allianz or the Travel Guard Group had they known that the airline negotiated an illicit brokerage fee with the sellers, according to the complaint filed Sept. 20 in the U.S. District Court for the Northern District of California.