JetBlue kicked off a 1-day fare sale this morning. The sale features fares as low as $29 each way, but it also comes with the significant catch that the sale pricing applies mostly to flights on Tuesdays and Wednesdays.The rest of the details: Tickets must be purchased by 11:59 p.m. ET, and are good for travel between Jan. 30 and April 3. On most routes, JetBlue's sale covers flights only on Tuesdays and Wednesdays, though the airline says there are a "limited exceptions apply."

Sample one-way fares (taxes and fees are not included): Long Beach-Las Vegas, $29 each way; Burbank-Las Vegas, $29 each way; Baltimore-Boston, $34 each way; Richmond-Boston, $39 each way; New York JFK-Chicago, $65 each way; Jacksonville-San Juan, $69 each way; Portland (Ore.)-Long Beach, $79 each way; San Francisco-Austin, $89 each way; Newark-Tampa, $97 each way. White Plains (N.Y.)-Nassau (Bahamas), $99 each way; Los Angeles-New York JFK, $139 each way.