Social media posts are circulating online, showing a lightning bolt zap an airplane Monday night as it flew over Seattle’s South Lake Union neighborhood. Delta Air Lines said it is aware of the reports and said the plane landed safely. How common does lightning strike commercial planes? Here's what experts say. "What you're asking, should they be afraid to get on the next airline? Absolutely not," said Scott Hamilton, an aviation industry consultant. According to aviation experts, lightning strikes each commercial plane flying once or twice a year on average. READ MORE: https://www.king5.com/article/news/local/delta-air-lines-plane-struck-by-lightning-flying-over-seattle/281-cad3a66f-a946-43ea-8f25-11c9ee100c20