Flying at unpopular hours, such as the red-eye or early in the morning, instead of the late morning through afternoon, increases your chance of getting the best deal. Recent statistics showed that flights leaving before 09:00 are cheaper than any other time of the day.
Timing plays an important part. Specifically, plane tickets usually don't get cheaper closer to the departure date. Instead, flights tend to be the most inexpensive when you book between four months and three weeks before your departure date.
Fares for domestic flights have been falling considerably as airlines added capacity to U.S. routes, jet fuel prices dropped, competition increased and travelers shifted to more global getaways.
You are usually better off booking direct with the airline. If you book through a travel agency and something goes wrong then the airline may well refer you back to the travel agency to fix the problem. That can be tricky if the agency is either thousands of miles away or only contactable via the internet.
Is it cheaper to book a flight at the last minute? We've said this before, but it's worth repeating at the outset—no, it's really not cheaper to book a flight at the last minute. Yes, last minute travelers used to score the occasional fare so low it might have induced shock, but that's no longer the case.
As we've shown, the price of ticket on any one flight will change – and can even change multiple times a day. You simply do not have the time to mull things over and to shop around the Internet indefinitely to “make sure” you're getting the best deal.
Early to midweek tends to be cheaper on off-peak days, and as a rule of thumb, the busier the weekend, the more the flight is going to cost. “I've found that it is generally cheaper to fly on Tuesdays, Wednesdays and Saturdays,” adds Dengler.
However, airlines say prices change not because of a consumer's search history on a website, or their cookies, but because of inventory updates or glitches on the website, FareCompare's Rick Seaney said in an email.
Generally, Tuesday, Wednesday and Saturday are the cheapest days to fly, while Fridays and Sundays are pricier, according to travel deal site FareCompare. Leisure travelers tend to fly on the weekends, either starting their vacations on Friday or taking a long weekend Friday to Sunday.
The myth has been going around for years, but the truth is that flight prices don't go down on Tuesdays. To be fair, they did at one point in time, and savvy travelers could score a great deal late on a Tuesday night.