AirHint found the following cheapest return flights from Chicago (ORD) to Lisbon (LIS)
in May 2025 (see full year ).
Return flights
04 May
- 14 May
American Airlines
$ 549
12 May
- 21 May
Aer Lingus
$ 550
05 May
- 14 May
British Airways
$ 552
06 May
- 20 May
British Airways
$ 554
14 May
- 18 May
Icelandair
$ 560
04 May
- 12 May
British Airways
$ 564
12 May
- 19 May
British Airways
$ 566
14 May
- 23 May
British Airways
$ 580
07 May
- 21 May
Delta
$ 580
10 May
- 21 May
British Airways
$ 613
20 May
- 04 Jun
Aer Lingus
$ 639
08 May
- 12 Jun
Spirit Airlines
$ 715
28 May
- 05 Jun
Finnair
$ 734
28 May
- 18 Jun
British Airways
$ 735
28 May
- 11 Jun
British Airways
$ 735
26 May
- 03 Jun
United
$ 740
26 May
- 02 Jun
British Airways
$ 745
31 May
- 05 Jun
Air Canada
$ 751
26 May
- 07 Jun
British Airways
$ 808
30 May
- 05 Jun
Icelandair
$ 823
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.
