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Allegiant Air flies nonstop to Key West International Airport from a handful of cities, mostly during the winter season. Mundotrip shows you the available dates and fares so you can compare before booking. Key West is the southernmost point in the continental US, about 160 miles from Miami by road but much faster by air. The island runs just 4 miles long and 1 mile wide, so you don't need much to get around once you're there. Call +1 866-331-1746 for help booking or search fares on our site.
O'Hare International Airport (Chicago) (ORD)
Allegiant flies this route seasonally from Chicago, mostly running November through April. About 3.5 hours in the air. Fares during winter peak can run $80-120 each way.
Philadelphia International Airport (PHL)
Philly to Key West is around 3 hours on Allegiant. Seasonal service starts in late fall. If you can grab a Tuesday departure, fares drop considerably.
Minneapolis-Saint Paul International Airport (MSP)
Minneapolis-area travelers get a direct Allegiant option to the Keys. Long flight at about 4 hours, but beats connecting through Miami or Fort Lauderdale.
Detroit Metropolitan Wayne County Airport (DTW)
Detroit Metro to Key West runs about 3 hours. Allegiant operates this during winter months when demand from Michigan snowbirds is highest.
Baltimore/Washington International Airport (BWI)
BWI gives DC-area travelers access to Key West without the drive to Fort Lauderdale. About 2.5 hours in the air with twice-weekly service.
Raleigh-Durham International Airport (RDU)
RDU to Key West is a quick 2-hour hop. Allegiant runs limited seasonal service here, so book early when schedules open.
Cheapest Months to Travel
September and October are the cheapest months, sitting right in hurricane season when fewer people want to visit. Prices can drop to $40-50 each way. Late April and May also see lower fares as snowbird season winds down.
Peak Travel Seasons to Avoid
January through March is peak season in Key West. Fantasy Fest in late October also drives prices up. New Year's week is the most expensive time to fly, with fares hitting $150+ each way even on Allegiant.
Best Time to Book
Book 6-8 weeks ahead for the best balance of availability and price. Allegiant's winter Key West routes sell out fast, especially around holidays. Set fare alerts if you're flexible on dates.
Midweek Advantage
Wednesday departures tend to be cheapest. Allegiant's Key West flights don't run daily, so you're limited to their schedule, usually 2-3 departures per week from each city.
Time Difference
Key West is Eastern time. Same as most East Coast departure cities. Central time zone travelers gain an hour heading east.
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