Yes, you can cancel a British Airways (BA) flight and receive a refund+𝟭-𝟴𝟱𝟲-𝟴𝟬𝟰-𝟮𝟮𝟱𝟳, If you have booked directly with British Airways and you notice a mistake with your booking after you have paid for your ticket(s) +𝟭-𝟴𝟱𝟲-𝟴𝟬𝟰-𝟮𝟮𝟱𝟳 𝗼𝗿 +𝟭-𝟴𝟱𝟴-𝟮𝟵𝟵𝟮𝟱  𝟬𝟱, you can cancel your flight booking and claim a full refund without penalty +𝟭-𝟴𝟱𝟲-𝟴𝟬𝟰-𝟮𝟮𝟱𝟳 𝗼𝗿 +𝟭-𝟴𝟱𝟴-𝟮𝟵𝟵𝟮𝟱  𝟬𝟱, up to 24-hour cancellation policy , allowing passengers to cancel their reservations within 24 hours of booking for a full refund, provided the flight is at least seven days away.
Safe travels and happy flying!