If you missed a flight because you were late to the airport, you don't have any real rights. Most airlines will classify you as a "no-show" and keep your money. Note that your return flight will also be canceled automatically. If you contact the carrier before the flight departs, you may be able to get a partial ticket credit depending on the kind of ticket you have.

But if you miss a connecting flight, you're not out of luck. Under most domestic airline policies — which are outlined in the contract of carriage on the airline website — if you miss a connection, it will re-book you on the next flight at no charge. If that means staying at the airport overnight, the airline will cover a hotel stay. For example, American Airlines will pay for a hotel if the delay is "within our control or you were diverted to another city, and we don’t board to your final destination before 11:59 p.m. local time," according to its contract.

If you miss a connection on a flight to Europe, you might be entitled to even more. For certain missed connections European consumer regulations provide up to 600 euros, plus rerouting or a flight back to your point of departure at no extra cost. "When you're on an international flight going to Europe and miss your connection because of the delay or cancellation of the first flight, you have rights," says Thomas Busson, a spokesman for ClaimCompass, a service that helps passengers obtain compensation under EU Regulation 261/2004, the European consumer rule.

But here's the best advice of all: Don't be late. Set an alarm and don't forget to turn up the volume on your phone. Set a calendar reminder with your flight itinerary. And give yourself plenty of time to get to the airport. Airlines such as United even publish check-in processing times to allow for better planning.

https://www.usatoday.com/story/travel/advice/2018/03/25/missed-flight-passenger-rights/450366002/

Why does it feel like these rights are hidden by the airlines or travel agencies? I'm just knowing about this.

Really? hope the Nigeria factor won't come into play?

surely an eye opener, also going through the terms and conditions on the flight information is key, that way you don't end up missing your rights.