1. Flights of less than 1500 km: up to €250 in case the delay is 3 hours or more
2. Flights between 1500 km and 3500 km: up to €400 in case the delay is 3 hours or more
3. Flights of more than 1500 km within the EU countries: up to €400 in case the delay is 3 hours or more
4. Flights of more than 3500 km between the EU airport and non-EU airport: up to €300 in case the delay is 3-4 hours
5. Flights of more than 3500 between the EU airport and non-EU airport: up to €600 in case the delay is more than 4 hours
So, if you would like to submit an aer lingus compensation claim, mind the factors mentioned above.
What about the cancelled flights, you have the right to get a full refund, and along with this, all other flights from the same booking should be compensated as well. However, you can use your right to replace your flight at the airline expense. If you refuse to get a flight replacement and you are half-way through your trip, you have the right to fly back to the airport of your departure on the airline expense. Generally, you can get from €125 to €600 compensation for the flight cancellation.
Ask for your compensation right at the airport. But, for example, If your aer lingus delay claim is rejected you can submit it later with the help of the claim companies.