Useful to know... (WSJ):
One factor behind the change: Airline executives come into work Monday looking to raise fares, not discount them with sales to fill seats. Just this week airlines put through a $2 each-way across-the-board fare hike, even though prices for oil—the largest expense for airlines—have been plunging. Prices are still going up due to increasing demand for the limited number of available seats.
The lower Sunday and Saturday prices also result from the ability social media has given airlines to throw discounts in front of consumers at any time. That turns vacation shoppers surfing the Web on weekends into ticketed passengers without discounting tickets business travelers might buy while at work. And the findings reflect the lack of corporate sales over the weekend, since business travelers typically fly on more expensive tickets than vacation buyers.
When searching for the lowest fare, don’t give up on Tuesdays. It’s the day with the most frequent price drops, leaving the door open for good deals.