Cheap flights from Key West to the United States from $82

In general, December is the cheapest month to fly from Key West to United States. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $51. If you aren’t able to travel during the month of December, then book flights to United States from Key West during May instead. Flights to United States in May, while not as cheap as those in December, still average around $54.

According to our data, Thursday is the cheapest day to fly to United States from Key West. The lowest ticket price found for a Thursday departure recently was $289. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. If your travel schedule is flexible, try to avoid departing on a Monday because tickets tend to average around $557. These prices are subject to change though, so be sure to set up a Price Alert for flights to United States.

The cheapest time of day to fly to United States is in the afternoon when flights can be purchased for as low as $361. Try not to purchase tickets at noon because they tend to be around $410. Of course, these prices can vary depending on the time of year and what airport you fly to.

Fly from Key West to Atlanta Hartsfield-Jackson for the best Key West - United States flight prices

No. A direct flight is the cheapest option for a flight between Key West to United States.

Allegiant Air, American Airlines, and Delta are the most popular carriers operating from Key West to United States

American Airlines, United Airlines and Delta are the top three most popular airlines that fly to United States from Key West according to our data. American Airlines is the first choice among our users, with 64% of people opting to fly with this airline when traveling to United States. Keep in mind that there are 4 different airlines that fly to United States on a routine basis, so you have a few additional options to choose from.

Historically, on average around 12% of flights between Key West and United States have experienced a delay on any given week. The average delay length over the past 12 months has been 95 minutes.

Generally, flights departing in the morning tend to experience fewer delays. Flights at night have, in the past, seen delays more frequently in comparison.

Wednesday is statistically the day of the week which experiences the fewest number of delays on this flight route. Friday has historically seen more delays on average compared to the rest of the week.

According to our data, American Airlines have had the least number of delays on this route over the last 12 months; with about 12% of their flights experiencing any sort of delay.

As of May 2026, there are 27 flights per day flying from Key West to United States. The most common time of day flights depart is 11:00AM, with 46% of flights taking off at noon.

The number of flights available between Key West and United States is 194 per week as of May 2026. The most frequent departure day is Thu, with 16% of weekly flights leaving on this day.