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

Return flights

30 Sep - 07 Oct	United
09 Sep - 16 Sep	United
27 Sep - 04 Oct	United
04 Sep - 11 Sep	United
08 Sep - 15 Sep	United
10 Sep - 17 Sep	United
05 Sep - 12 Sep	United
06 Sep - 13 Sep	United
25 Sep - 02 Oct	United
11 Sep - 18 Sep	United
23 Sep - 30 Sep	United
22 Sep - 29 Sep	United
16 Sep - 23 Sep	United
29 Sep - 06 Oct	United
24 Sep - 01 Oct	United
26 Sep - 03 Oct	United
28 Sep - 05 Oct	United

Also check the deals for one-way flights from Kansas City 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 Kansas City to Lisbon in September from 697€

Return flights