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

Return flights

08 Apr - 12 Apr	Icelandair
25 Apr - 10 May	Icelandair
15 Apr - 19 Apr	Icelandair
01 Apr - 12 Apr	Icelandair
21 Apr - 29 Apr	Lufthansa
19 Apr - 28 Apr	Lufthansa
08 Apr - 15 Apr	Iberia
12 Apr - 23 Apr	Delta
08 Apr - 16 Apr	Delta
13 Apr - 21 Apr	SWISS
19 Apr - 27 Apr	KLM
27 Apr - 05 May	SWISS
29 Apr - 06 May	Delta
28 Apr - 06 May	Delta
28 Apr - 05 May	Finnair
29 Apr - 07 May	Delta
30 Apr - 05 May	SWISS
30 Apr - 08 May	SWISS
30 Apr - 07 May	SWISS
26 Apr - 04 May	SWISS

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.

Book a cheap hotel in Lisbon

Cheap car rent in Lisbon

Cheapest return flights from Chicago to Lisbon in April from $423

Return flights