article_snippet.sent: Pictured, passengers queue for check-in at Stansted Airport .
article_snippet.sent: The number of delayed flights increased by 7 per cent with 2,427 hold-ups compared to 2,260.
article_snippet.sent: Monarch had the greatest increase in delays
article_snippet.sent: EasyJet has seen a 19 per cent increase with 245 delays in the first four months of this year compared to 206 last year.