I would only resort to services like that if your case is really stuck, in my experince (with 4 different airlines). A quick e-mail to the airline with the ord

I would only resort to services like that if your case is really stuck, in my experince (with 4 different airlines). A quick e-mail to the airline with the order number, stating the expected flight plan, and comparing it with the actual flight plan and a calculated delay have always worked, even with the cheaper airlines.