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

Return flights

01 Apr - 12 Apr	Icelandair
08 Apr - 15 Apr	Air Canada
08 Apr - 15 Apr	TAP	direct
07 Apr - 14 Apr	Air Canada
03 Apr - 10 Apr	TAP	direct
05 Apr - 25 Apr	Turkish Airlines
15 Apr - 09 May	TAP	direct
04 Apr - 11 Apr	Air Canada
05 Apr - 25 Apr	TAP	direct
26 Apr - 03 May	TAP	direct
16 Apr - 23 Apr	United
01 Apr - 11 Apr	Turkish Airlines

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 $510

Return flights