Cheapest return flights from Chicago to Lisbon in April from $558

AirHint found the following cheapest return flights from Chicago (MDW) to Lisbon (LIS) in April 2026 (see full year).

Return flights

27 Apr - 04 May Delta
22 Apr - 29 Apr Frontier Airlines
21 Apr - 28 Apr Delta
25 Apr - 10 May Delta
13 Apr - 20 Apr Delta
29 Apr - 15 May Frontier Airlines
09 Apr - 16 Apr Delta
29 Apr - 13 May Frontier Airlines
25 Apr - 02 May Delta
29 Apr - 14 May Frontier Airlines
14 Apr - 21 Apr Delta
09 Apr - 21 Apr Delta
07 Apr - 13 Apr Delta
14 Apr - 20 Apr Delta
17 Apr - 26 Apr Frontier Airlines
06 Apr - 13 Apr Delta
26 Apr - 03 May Delta
30 Apr - 15 May Porter Airlines (Canada) Ltd
24 Apr - 10 May Frontier Airlines
24 Apr - 01 May Frontier Airlines

Also check the deals for one-way flights from Chicago to Lisbon in April.

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