Want to snag the cheapest Delta flights possible using your Flying Blue miles (that's the loyalty program for Air France and KLM)? It can feel like searching for a needle in a haystack, but there's a secret weapon most travelers miss: the Flying Blue award calendar! The AwardWallet blog just revealed how to unlock this hidden calendar and see a full view of available award flights, including those operated by Delta. This is huge because it lets you pinpoint the days with the lowest mileage requirements, potentially saving you a ton of miles on your next trip. So, if you're sitting on a pile of Flying Blue miles and dreaming of Delta adventures, head over to AwardWallet and learn how to use this award calendar. Bookmark that page – your future self (and your miles balance!) will thank you.