Cheapest return flights from St. Louis to Lisbon in May from 732€

AirHint found the following cheapest return flights from St. Louis (STL) to Lisbon (LIS) in May 2026 (see full year).

Return flights

17 May - 06 Jun Air Canada
15 May - 06 Jun Air Canada
22 May - 29 May United

Also check the deals for one-way flights from St. Louis to Lisbon in May.

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