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

Return flights

20 Sep - 26 Sep	TAP	direct
18 Sep - 24 Sep	TAP	direct
23 Sep - 07 Oct	KLM
24 Sep - 08 Oct	TAP	direct
15 Sep - 22 Sep	TAP	direct
25 Sep - 08 Oct	TAP	direct
21 Sep - 03 Oct	TAP	direct
17 Sep - 01 Oct	Air France
17 Sep - 15 Oct	Delta
13 Sep - 23 Sep	TAP	direct
10 Sep - 29 Sep	SWISS
19 Sep - 26 Sep	Finnair
07 Sep - 14 Sep	Air Canada
03 Sep - 12 Sep	KLM
10 Sep - 19 Sep	British Airways
09 Sep - 23 Sep	KLM
28 Sep - 02 Oct	Norse Atlantic Airways (UK)
05 Sep - 03 Oct	Delta
20 Sep - 04 Oct	Finnair
18 Sep - 05 Oct	SWISS

Also check the deals for one-way flights from Miami 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 Miami to Lisbon in September from 374€

Return flights