AirHint found the following cheapest return flights from Minneapolis (MSP) to Lisbon (LIS) in September 2025 (see full year).

Return flights

13 Sep - 21 Sep	Icelandair
03 Sep - 11 Sep	Icelandair
10 Sep - 18 Sep	Icelandair
06 Sep - 14 Sep	Icelandair
25 Sep - 03 Oct	Icelandair
27 Sep - 04 Oct	Icelandair
24 Sep - 02 Oct	Icelandair
08 Sep - 16 Sep	Icelandair
01 Sep - 09 Sep	Icelandair
02 Sep - 10 Sep	Icelandair
16 Sep - 24 Sep	Icelandair
13 Sep - 18 Sep	Icelandair
20 Sep - 28 Sep	Icelandair
27 Sep - 05 Oct	Icelandair
30 Sep - 08 Oct	Icelandair
23 Sep - 01 Oct	Air Canada
29 Sep - 06 Oct	Lufthansa
29 Sep - 07 Oct	Lufthansa
26 Sep - 03 Oct	Sun Country Airlines
28 Sep - 06 Oct	Icelandair

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

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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Cheapest return flights from Minneapolis to Lisbon in September from 392€

Return flights