Cheap flights from Florida Keys to the United States from $42

In general, September is the cheapest month to fly from Florida Keys to United States. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $138. If you aren’t able to travel during the month of September, then book flights to United States from Florida Keys during March instead. Flights to United States in March, while not as cheap as those in September, still average around $142.

According to our data, Thursday is the cheapest day to fly to United States from Florida Keys. The lowest ticket price found for a Thursday departure recently was $309. 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 $649. 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 $324. Try not to purchase tickets at noon because they tend to be around $378. Of course, these prices can vary depending on the time of year and what airport you fly to.

Fly from Key West to Orlando for the best Florida Keys - United States flight prices

You are more likely to see cheaper flights to United States from Florida Keys when booking weeks ahead of your departure date. In general, you can expect to find flights to United States for around $178 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to United States from Florida Keys for as low as $136 on momondo.

There are 4 cabin classes available to choose from on Florida Keys to United States flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Spirit Airlines, Frontier, and Delta are the most popular carriers operating from Florida Keys to United States

American Airlines, Delta and United Airlines are the top three most popular airlines that fly to United States from Florida Keys according to our data. American Airlines is the first choice among our users, with 58% of people opting to fly with this airline when traveling to United States. Keep in mind that there are 5 different airlines that fly to United States on a routine basis, so you have a few additional options to choose from.

As of February 2026, 318 flights take off from Florida Keys and land in United States each day. The most common flight departure time for this route is 11:00AM, with 60% of daily flights taking off in the afternoon.

As of February 2026, 2,226 flights take off from Florida Keys and land in United States each week. The most common flight departure day for this route is Mon, with 16% of weekly flights taking off on this day.