The late bird can also get the worm with this 11th hour holiday sale. United's offer is touting sale fares for dates surrounding Christmas and New Year's Day. Competing carriers are AirTran, American, JetBlue, Delta, and many more.
Through Monday, Aer Lingus' current sale features travel to Amsterdam, Brussels, Dusseldorf, Frankfurt, and Paris from $398 round-trip. Travel is valid from January through February, but book fares by 7:00 p.m. ET on Monday, December 21.
Lufthansa puts numerous European hotspots on sale, including Athens, Barcelona, Istanbul, and Paris. Round-trip fares begin at $550, and travel is available from 12 departure cities. Book by March 18 for departures through spring.
