Cheap flights from Atlanta to Key West from $90

In general, January is the cheapest month to fly from Atlanta to Key West. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $279. If you are unable to visit Key West during the month of January, then departing from Atlanta during the month September is also very affordable. Most momondo users find prices during this month for around $339.

On average, the least expensive day to fly to Key West from Atlanta is on a Tuesday. momondo users have found tickets for Tuesday departures for as low as $369. However, this price may fluctuate depending on the airline, the season, and holidays. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from Atlanta to Key West for around $497.

According to our data, the cheapest time of day to fly to Key West is in the afternoon. momondo users have found flights departing from Atlanta to Key West in the afternoon for as low as $416. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights to Key West are more costly in the morning, with an average ticket price of $438. Departure times in the morning fall within the peak daily travel times, which is why tickets can be more expensive.

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

You are more likely to see cheaper flights to Key West from Atlanta when booking weeks ahead of your departure date. In general, you can expect to find flights to Key West for around $427 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Key West from Atlanta for as low as $345 on momondo.

There are 3 cabin classes available to choose from on Atlanta Hartsfield-Jackson to Key West flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

You could potentially save up to 19% on your flight if you consider stops on a Atlanta to Key West flight.

As of February 2026, prices for Atlanta to Key West flights are approximately 19% cheaper when compared to flights at the same time last year.

Spirit Airlines is the most popular carrier operating from Atlanta Hartsfield-Jackson to Key West

Delta, American Airlines and Spirit Airlines are the top three most popular airlines that fly to Key West from Atlanta according to our data. Delta is the first choice among our users, with 80% of people opting to fly with this airline when traveling to Key West. Keep in mind that there are 3 different airlines that fly to Key West on a routine basis, so you have a few additional options to choose from.

As of February 2026, there are 8 flights per day flying from Atlanta to Key West. The most common time of day flights depart is 3:00PM, with 68% of flights taking off in the afternoon.

The number of flights available between Atlanta and Key West is 57 per week as of February 2026. The most frequent departure day is Mon, with 30% of weekly flights leaving on this day.