Heads up, deal hunters! There's a sweet spot right now for flights to Madrid, Spain. You can snag roundtrip tickets in regular economy for around $551. This is an unadvertised fare sale, so you won't see it splashed all over airline websites. So, how do you find this deal? The Flight Deal suggests using Matrix Airfare Search by ITA Software to find the cheap dates. Then, once you've got your dates locked in, head over to your favorite online travel agency (like Expedia or Priceline) or the airline's website to actually book the tickets. Why should you care? Well, Madrid is amazing, and this is way cheaper than you usually see flights going for! It's your chance to experience tapas, art, and Spanish culture without breaking the bank.