Alaska Airlines adjusted Flight #870 from Anchorage to Honolulu on March 8, 2016 just so the passengers could catch the solar eclipse from 35,000 feet. youtu.be/YBoa81xEvNA Quote from the Alaska Airlines blog: "Flying 500 mph at 35,000 feet, Alaska Flight 870 intercepted the eclipse 695 miles north of Honolulu. The moon shadow itself is oval, 68 miles wide by 500 miles long." According to the Globe Earth Curvature Calculator, passengers flying at 35,000 feet altitude shouldn't be able to see beyond horizon at 229 miles, but they could see the Moon's 500-mile-long shadow. And the horizon was completely flat too!