AirHint found the following cheapest return flights from Chicago (MDW) to Lisbon (LIS)
in May 2025 (see full year ).
Return flights
10 May
- 23 May
Delta
$ 651
05 May
- 11 May
Delta
$ 651
04 May
- 14 May
Delta
$ 718
04 May
- 12 May
Delta
$ 776
26 May
- 02 Jun
Porter Airlines (Canada) Ltd
$ 816
21 May
- 05 Jun
Porter Airlines (Canada) Ltd
$ 837
19 May
- 28 May
Frontier Airlines
$ 875
08 May
- 12 Jun
Frontier Airlines
$ 886
27 May
- 04 Jun
Porter Airlines (Canada) Ltd
$ 909
25 May
- 01 Jun
Porter Airlines (Canada) Ltd
$ 911
27 May
- 01 Jun
Porter Airlines (Canada) Ltd
$ 981
28 May
- 01 Jun
Porter Airlines (Canada) Ltd
$ 981
04 May
- 18 May
Delta
$ 993
23 May
- 01 Jun
Porter Airlines (Canada) Ltd
$ 1018
23 May
- 28 May
Porter Airlines (Canada) Ltd
$ 1104
16 May
- 21 May
Delta
$ 1106
16 May
- 23 May
Delta
$ 1107
17 May
- 24 May
Delta
$ 1164
21 May
- 02 Jun
Delta
$ 1531
Also check the deals for one-way flights from Chicago to Lisbon in May .
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.