For flights to/from/within the EU, if you arrive at your destination due to a missed connection more than 3 hours after your scheduled arrival time, you are entitled to the same reimbursement, rerouting, and rebooking structure as a denied boarding. For flights within the U.S., if your delay on the tarmac causes you to miss a connection that results in you arriving at your destination more than 3 hours after your original arrival time, you are entitled to compensation per the DOT guidelines. For non-tarmac caused delays, the compensation rules are set by each airline.