AirHint found the following cheapest return flights from St. Louis (STL) to Sao Paulo (GRU) in December 2025 (see full year).
Return flights
| 06 Dec - 17 Jan | Delta | ||
| 08 Dec - 03 Jan | Frontier Airlines | ||
| 23 Dec - 04 Jan | Frontier Airlines | ||
| 21 Dec - 04 Jan | Frontier Airlines | ||
| 20 Dec - 03 Jan | Frontier Airlines |
Also check the deals for one-way flights from St. Louis to Sao Paulo 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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