While it’s the first time I actually witness a passenger having her oversized carry-on denied at the gate, I enter the Airbus A320 and gasp. Also read: All You Need To Know About Gerber Coupons While saving money is nice, sometimes it’s better to spend a few more bucks for less travel hassle. The time of day you travel is also important. The day you fly can also make a big difference. Now Google Flights knows the difference between the “best” flight and the “cheapest” flight. Note that, if you find a lower fare after booking, you can rebook and keep the difference for travel by the same person within a year after the booking date. Also read: More Secrets For Combating Stress In Your Life An in-depth analysis of round-trip airline ticket purchases through online and traditional travel agencies found that Sunday is best day to nab the lowest price. Save even more money by booking with a credit card that rewards your purchases. McCartney notes that one factor that might skew the results in favor of Sunday is the lack of corporate ticket purchases on weekends. Also read: How To Run Price Matching At Target With Cartwheel South by Southwest starts that Friday, the airline might hike prices. But prices are also influenced by demand for a given flight schedule and by how many seats an airline has left on any given flight – “inventory” in industry-speak. Also read: 30% Off GAP Coupons, Promo Codes & Deals Additionally, planes don’t have a first-class cabins, which turns off travelers whose companies fork out for front-section seats. There are a ton of theories out there about the best day to buy airline tickets.