To arrive at Norwich Intl. Airport (NWI) without delays, choose a flight that leaves Blackpool (BLK-Blackpool Intl.) before 3 PM. The likelihood of cancellations is 22% higher, on average, for departures after this hour.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.