If you’ve been waiting for the lowest possible airfare for a trip this summer, it may be time to get off the fence.

Fares have dropped for months while travelers held off buying tickets because they were afraid of losing a job or worried about affording even a scaled-back vacation. But with jet fuel prices rising, some fares could be set to climb again.

Rick Seaney, CEO of Fare- Compare.com, said it looks like airlines are trying to halt the fare slide, with recent hikes of $10 and $20 round-trip.

Still, he wrote in an e-mail that the minor increases in the last three weeks “have by no means completely curtailed the flood of cheap airline” tickets from the first half of the year. In fact, AirTran recently put out fares that hit new market lows on hundreds of routes, he wrote.

Memorial Day usually signals the end of the best time to book travel, but this year was different. With fewer people traveling, the sales continued. A Travelocity survey shows fares down 17 percent for travel between Memorial Day weekend and Labor Day.

The travel Web site also says travelers are booking 86 days before departure instead of 90 days. That might not sound like a big deal, but Genevieve Shaw Brown, senior editor at the online travel Web site, said it takes lots of people booking later to move the needle that much.

Tom Parsons, CEO of discount travel Web site Bestfares. com, recommends making a top-10 list and checking fares until you find a bargain. Chances are some of your favorite spots will be on sale.

Take a closer look at travel Web sites, including the airline sites, that often throw in additional discounts if you enter a specific code usually found in a section for promotional fares. Airline Web sites also offer deals that include hotel and sometimes car rental.

Gabe Saglie, senior editor at travel information Web site Travelzoo, expects promotions to continue into the summer as people remain hesitant to book vacations far in advance.

“People are definitely becoming more impulse-driven,” he said.

If you still want to go somewhere before mid-August, Parsons says buy your tickets now. It’s unlikely the deals will get any better. After that it’s another story. Parsons says airlines haven’t started serious discounting for flights after mid- August, so you might want to wait to book tickets for then.

Parsons and other travel watchers have noticed that fare hikes have eliminated ultra-cheap tickets to Europe between now and Aug. 17.

“It’s across the board, it’s like a disease,” Parsons said.

Fares out of any particular city are driven mostly by competition to a destination. For instance, Frontier, Southwest, and United were already competing vigorously in Denver before the recession. So fares there fell just 1 percent through June 1, according to Bob Harrell of airfare-tracking firm Harrell Associates.

Regardless of where you live, it’s not too late to get out for the summer: