NEW YORK — For travelers who aren't tapped out from the holidays, it's a great time to fly.
January and February are the slowest travel months of the year. Planes that were packed during the holiday travel season could be just half to two-thirds full.
To fill their empty seats, airlines are offering abundant fare sales and ticket prices lower than those in recent months. AirTran and Southwest, among others, have launched widespread sales. Other airlines are running more low-key offers.
Fares for flights through mid-February can be as much as 50 percent lower than summer ticket prices.
Many winter sales are unadvertised. George Hobica of travel website airfarewatchdog.com says these so-called retaliatory fares are common in slower travel periods as airlines fighting over a limited amount of customers try to undercut one another.
Hobica says travelers need to set up fare alerts and carefully research prices to ensure they catch these stealth sales.
You can set alerts on airline websites, online booking sites Orbitz and Expedia or other travel sites such as Travelzoo or TripAdvisor. It's best to use more than one.
In general, any flights to warm weather destinations are your best bets for winter deals, Hobica said, including California and some parts of the Caribbean.
Even though many sales fly under the radar, there are a few big-ticket sales available now. AirTran's current sale covers 3,000 routes with round-trip fares starting at $118. The purchase window ends soon, though: it's only available through midnight Thursday for travel dates through May. Frontier Airlines also has put its fares on sale through Thursday, with fares starting at $98 round-trip. Southwest Airlines Co. is offering deals starting at $128 for booking through Monday.
But buyers beware: A sale fare may seem flashy, but sometimes another airline's regular fare will be cheaper. The key is to monitor the cheapest prices to your favorite destinations. When a deal pops up, you'll know if it's a good one or not.
Fewer travelers means less-crowded planes. So, assuming good weather, your flight is more likely to be on time because it's quicker to board a plane that isn't full. Overbooking is also less likely, so gate agents don't have to spend time looking for volunteers to take a voucher for another flight.
And the deals don't just stop with cheap ticket prices. You'll also see less-expensive hotel rooms and rental cars. Book your flight, hotel and car (if you'll need one) together to save the most money. Online booking sites often secure deals that aren't available to travelers purchasing parts of their trip individually.
And act fast: Airfares and other travel costs start to climb around Feb. 15, synched up with many school vacations. They bump up again at the end of March, as the spring travel season begins.