Internet travel companies such as Expedia have made a fortune pulling in small amounts of cash from lots and lots of consumers. But plaintiff lawyers might get the last laugh by dinging them with lots and lots of small damages in class actions.

Attorneys suing several online hotel brokers believe they’re on the brink of a breakthrough in litigation over minor charges on customers’ bills. San Francisco firm Gutride Safier expects to get a class certification order any day now in one such case against the company that operates Hotwire, a travel booking Web site.