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

Return flights

11 Apr - 19 Apr	Icelandair
15 Apr - 23 Apr	Iberia
27 Apr - 05 May	Iberia
28 Apr - 06 May	Iberia
07 Apr - 15 Apr	American Airlines
08 Apr - 16 Apr	American Airlines
13 Apr - 21 Apr	Finnair
20 Apr - 28 Apr	Finnair
29 Apr - 07 May	Iberia
22 Apr - 29 Apr	Finnair
22 Apr - 30 Apr	Finnair
14 Apr - 22 Apr	Finnair
21 Apr - 29 Apr	Finnair
29 Apr - 06 May	British Airways
26 Apr - 04 May	British Airways
27 Apr - 04 May	Air France
29 Apr - 04 May	KLM
24 Apr - 02 May	Icelandair
30 Apr - 08 May	SWISS
23 Apr - 01 May	Lufthansa

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

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 Chicago to Lisbon in April from 314€

Return flights