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

Return flights

09 Sep - 16 Sep	Spirit Airlines
24 Sep - 01 Oct	Spirit Airlines
29 Sep - 06 Oct	Spirit Airlines
23 Sep - 30 Sep	Spirit Airlines
08 Sep - 15 Sep	Spirit Airlines
09 Sep - 19 Sep	Spirit Airlines
11 Sep - 18 Sep	Spirit Airlines
06 Sep - 13 Sep	Spirit Airlines
13 Sep - 30 Sep	Spirit Airlines
02 Sep - 09 Sep	Spirit Airlines
30 Sep - 07 Oct	Spirit Airlines
03 Sep - 10 Sep	Spirit Airlines
12 Sep - 26 Sep	Spirit Airlines
25 Sep - 02 Oct	KLM
26 Sep - 03 Oct	Spirit Airlines
27 Sep - 04 Oct	Spirit Airlines
28 Sep - 05 Oct	Iberia

Also check the deals for one-way flights from Charlotte 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 Charlotte to Lisbon in September from $585

Return flights