Https://answers.microsoft.com/en-us/msoffice/forum/all/what-day-are-united-flights-the-cheapest/7c3b7bed-a3cf-4c00-bd83-53f069f96457 https://answers.microsoft.com/en-us/msoffice/forum/all/what-day-are-united-flights-the-cheapest/7c3b7bed-a3cf-4c00-bd83-53f069f96457