White straight long object in sky not moving for about a minute and then disappeared fr

The object appeared to be a straight white object in the sky look bigger than a plane I'm flying about as high as a plane maybe 20-30,000 feet I think it would planes fly high but did not move like a plane did not move at all for about a minute I seen the object to the sky I look down to see how fast I was going look back up after it was gone look to the left right up down after nowhere to be found clear Blue Sky