That did not take long. On Sunday, April 19, British Airways will take off from London Heathrow to St. Louis. It is a record-breaking development because it means BA will fly from Heathrow to 26 US airports in the peak summer. The prior record was 25, which was last available in 2023. It comes days after partner Aer Lingus began its first flight from Dublin to Raleigh/Durham.