Cheap flights from Michigan to Key West from $84

In general, September is the cheapest month to fly from Michigan to Key West. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $377. If you are unable to visit Key West during the month of September, then departing from Michigan during the month August is also very affordable. Most momondo users find prices during this month for around $392.

You are more likely to see cheaper flights to Key West from Michigan when booking weeks ahead of your departure date. In general, you can expect to find flights to Key West for around $474 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Key West from Michigan for as low as $315 on momondo.

Spirit Airlines, Delta, and Breeze Airways are the most popular carriers operating from Michigan to Key West

American Airlines, Delta and United Airlines are the top three most popular airlines that fly to Key West from Michigan according to our data. American Airlines is the first choice among our users, with 65% of people opting to fly with this airline when traveling to Key West. Keep in mind that there are 5 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 32 flights per week flying from Michigan to Key West. The most common day of the week flights depart is Wed, with 19% of flights taking off on this day.

If you’re flying from a popular airport in Michigan, such as Detroit or Grand Rapids, and flying into Key West, then you can expect flight times to average 4h 49m and 5h 13m, respectively.