The move comes after Heathrow announced it would be extending its cap on passenger capacity until the end of October.
Ryanair’s group chief executive Michael O’Leary said: "While Heathrow continues to cut flights and raise fares for families, Ryanair and Stansted continue to add flights, and offer thousands of low-fare seats for the Autumn Mid-Term Break.
"With more than 500 additional flights, more than 100,000 additional seats, and prices starting from just €29.99, Ryanair looks forward to welcoming thousands of additional families during the Autumn mid-term break on its low-fare flights to/from Stansted."
