優しい航空会社もあるようです

When flights are cancelled within 14 days of travel, airlines are required to compensate customers. There is also compensation available for delayed flights. This comes under EU rules.
However, airlines are not required to pay compensation for disruptions caused by extraordinary circumstances that are beyond their control. In practice, this has included extreme weather conditions and it seems likely the volcanic cloud will not be covered by compensation rules.

EUルールは上記のようですが、個別に救済してる見たいです。
トルコ航空を見直して上げてもよいかも。