These flights from $112 are over $200 off typical fares to Key West and they're available through the beginning of 2021. Moreover, airlines are offering flexible booking policies, so if you need to change your dates after booking you're covered.
Fly to Key West Timeframe: 3. Jul. 2020 - 31. Jan. 2021
New York, Fort Lauderdale, Boston, Washington, Minneapolis, Los Angeles, Houston, Chicago, Seattle
This deal was published more than a week ago. Therefore it is possible prices are not up to date or are no longer available.