Cheap flights from Chicago to Lisbon, Portugal for only $343 roundtrip with United Airlines and Lufthansa.
The example dates listed below range between $343 and $353 roundtrip.
Availability from October 2022 to April 2023 (excluding Christmas/New Year)
26th Oct – 2nd Nov
28th Oct – 4th Nov
25th Jan – 1st Feb
27th Jan – 3rd Feb
28th Mar – 4th Apr
29th Mar – 5th Apr