JetBlue announced a $25 flight sale for the airline's 25th birthday, plus detailed new Europe routes, two new lounges and first-class options.

Frontier Airlines recently announced the 'Love is in the Air!' fare sale, with discounted one-way flights as low as $19 to popular destinations including Fort Lauderdale, Las Vegas, and Orlando.

JetBlue is offering a variety of deeply discounted flights to celebrate 25 years in business. The deals end Feb. 12.