Cheapest return TUS–LIS flights, September

AirHint found the following cheapest return flights from Tucson (TUS) to Lisbon (LIS) in September 2026 (see full year).

Return flights

10 Sep - 15 Oct Delta
09 Sep - 18 Sep Delta
08 Sep - 09 Sep Alaska Airlines

Also check the deals for one-way flights from Tucson to Lisbon in September.

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