If you really want to cut cost, what are some of your favorite travel hacks. Are there like best days to book. I mean, tricks like that.There isn't a single best day to book, but there are best days to fly, and they typically fall midweek. If you can shift your travel, especially international travel to be on Monday, Tuesday or Wednesday departing and returning, you can save hundreds. Think $300 to $500 savings on trips to Europe in Asia.A couple dollars here and there. If you fly end of the week, it might ...