https://community.ricksteves.com/travel-forum/greece/what-day-of-the-week-are-united-flights-the-cheapest

https://community.ricksteves.com/travel-forum/greece/what-day-of-the-week-are-united-flights-the-cheapest https://community.ricksteves.com/travel-forum/greece/what-day-of-the-week-are-united-flights-the-cheapest https://community.ricksteves.com/travel-forum/greece/what-day-of-the-week-are-united-flights-the-cheapest