AirHint found the following cheapest return flights from St. Louis (STL) to Lisbon (LIS) in June 2026 (see full year).
Return flights
| 04 Jun - 12 Jun | Air Canada | ||
| 19 Jun - 11 Jul | Air Canada | ||
| 01 Jun - 04 Jun | WestJet |
Also check the deals for one-way flights from St. Louis to Lisbon in June.
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