MTown

On EU flights (see below) if the problem was caused by something routine, such as component failure and general wear and tear you are entitled to compensation.

An EU flight is where the flight departed from an EU airport, regardless of the airline OR where an EU airline landed at an EU airport. Under this law, EU airports also include those in Iceland, Liechtenstein, Norway and Switzerland.

So a delayed Manchester to Miami flight qualifies, regardless of the airline. Yet for Miami to Manchester, you are entitled to compensation flying Virgin or KLM, but not on Air India.

I don’t know the law in the USA.