Cheapest return flights from St. Petersburg to Key West in December from $115

AirHint found the following cheapest return flights from St. Petersburg (PIE) to Key West (EYW) in December 2025 (see full year).

Return flights

04 Dec - 05 Dec Allegiant Air direct
01 Dec - 04 Dec Allegiant Air direct
01 Dec - 03 Dec Allegiant Air direct
03 Dec - 04 Dec Allegiant Air direct
01 Dec - 05 Dec Allegiant Air direct
03 Dec - 05 Dec Allegiant Air direct
04 Dec - 06 Dec Allegiant Air direct
06 Dec - 17 Dec Allegiant Air direct
07 Dec - 17 Dec Allegiant Air direct
04 Dec - 17 Dec Allegiant Air direct

Also check the deals for one-way flights from St. Petersburg to Key West in December.

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The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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