True, according to travel experts flying Wednesday is in fact the cheapest day to fly.
According to leading airline ticket comparison websites, choosing to fly midweek will have you purchasing cheaper tickets than choosing to fly any other time of the week. People look to purchase tickets to fly on or around the weekend, causing flights to be more expensive because of this high demand. So, your best bet is to avoid high traffic days and focus on traveling on days that are less in demand, Wednesday. The next best day is Tuesday, however due to a lesser amount of airplanes in use this day prices may be slightly higher.
Source: http://traveltips.usatoday.com/cheapest-day-week-travel-61429.html Source: http://www.farecompare.com/travel-advice/tips-from-air-travel-insiders/