In some cases, your flight disruption may be covered thanks to connecting flights, even if it would not normally be eligible for compensation on its own.
One example is if you are flying from Europe to the United States on a US airline, with a stop in the US. The first leg of the trip, from the EU to the US, would obviously be eligible for compensation under EU regulation EC 261. But the second flight – between two US cities – might also be covered, if the two flights are with the same carrier and part of the same flight reservation (under one booking reference number).
There is more information on you Know Your Rights page for EC 261, but if you have any doubts or questions about your disrupted flight’s eligibility, the fastest way to check is to use the Inspecto eligibility check and enter your flight details.