Skiathos& Skopelosr or Zaki& Lefkada
 

I would like a recommendation for which 2 islands to visit?

A little more information about your likes/needs may help in people forming a response. I am rather biased as I adore Skiathos.

I suppose you meant Zakynthos, KEFALLONIA and Lefkada?

So thank you for your response.
We would like white sandy beaches, quaint towns an good food.
We would also like airport access because we are traveling to the Netherlands
after.

There is no coral sand in the Mediterrenean. Most sandy beaches are yellow to brown.

Direct Amsterdam bound flights from these islands are not daily, at some dates, you may have to use neighbouring airports (like Argostoli instead of Preveza or Volos instead of Skiathos) or to fly via another airport