Spirit's weekend sale features flights to places such as Orlando, Las Vegas, Detroit, and Kingston. Book tickets by Monday night.
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United's Europe sale features flights to Paris, Rome, and Dublin. Travel is valid from late October through mid-March.
Aer Lingus' Ireland offer features winter flights to Dublin and Shannon. Departures are available from New York, Orlando, Chicago, San Francisco, and several other U.S. cities.
Hawaiian's Honolulu flights are valid through the middle of March. Departures are available from Los Angeles, Seattle, or Phoenix.
Southwest's Thanksgiving offer features sale fares for travel on November 22, 23, or 27. Destinations include Chicago, Houston, and Las Vegas.
