May and September deliver the islands without the crowds — and award space to Athens opens up just as cash fares spike.
Gurnish Sahni
Jul 28, 2026

Greek island coastline

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Greece has a narrow but glorious shoulder season — late spring and early autumn — when the weather is still excellent, the islands are dramatically less crowded, and cash airfares to Athens spike right as points availability tends to improve.
Air France-KLM Flying Blue’s monthly Promo Rewards have specifically discounted North America–Athens routings before, with economy fares as low as 18,750 miles one-way during promo windows — transferable in from Chase or Amex within a day or two of finding the fare. Because shoulder-season demand is lower, award space (promo or otherwise) tends to be meaningfully easier to find than during peak summer.
With airfare kept cheap via points, shoulder season is the moment to splurge on the parts of a Greece trip that are genuinely worth paying cash for: a few nights at a Santorini caldera-view hotel, a private sailing day around the Cyclades, or an extra few days island-hopping to Naxos or Paros instead of just Mykonos and Santorini.
Greece rewards travelers who go against the calendar crowd: book shoulder season, watch Flying Blue’s promo list for an Athens discount, and redirect the cash you save on flights into the on-the-ground experience.

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Gurnish Sahni, founder of Credit Miles Guru, is a software engineer by profession and a passionate points strategist by heart. When he's not coding, he's crafting luxury travel itineraries using reward points to fly his family—especially his 5-year-old daughter—in business and first-class cabins around the globe. With a knack for smart spending and a love for unforgettable journeys, Gurnish shares tips on unlocking premium travel experiences without breaking the bank.