AirHint found the following cheapest return flights from Chicago (MDW) to Lisbon (LIS)
in May 2025 (see full year ).
Return flights
01 May
- 08 May
Virgin Atlantic
$ 710
04 May
- 18 May
Delta
$ 729
04 May
- 12 May
Delta
$ 729
02 May
- 09 May
Delta
$ 729
28 May
- 18 Jun
Delta
$ 802
28 May
- 11 Jun
Delta
$ 802
31 May
- 11 Jun
Porter Airlines (Canada) Ltd
$ 818
30 May
- 10 Jun
Porter Airlines (Canada) Ltd
$ 827
11 May
- 21 May
Delta
$ 853
08 May
- 11 May
Frontier Airlines
$ 901
31 May
- 08 Jun
Porter Airlines (Canada) Ltd
$ 918
09 May
- 19 May
Delta
$ 973
22 May
- 26 May
Porter Airlines (Canada) Ltd
$ 1035
21 May
- 25 May
Porter Airlines (Canada) Ltd
$ 1061
05 May
- 12 May
Porter Airlines (Canada) Ltd
$ 1078
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.
