AirHint found the following cheapest return flights from Chicago (MDW) to Porto (OPO) in February 2026 (see full year).

Return flights

10 Feb - 17 Feb	KLM
03 Feb - 10 Feb	KLM
04 Feb - 11 Feb	KLM
11 Feb - 18 Feb	KLM
17 Feb - 24 Feb	Air France
18 Feb - 25 Feb	Air France
16 Feb - 23 Feb	KLM
24 Feb - 03 Mar	KLM
25 Feb - 04 Mar	KLM
02 Feb - 09 Feb	KLM
05 Feb - 12 Feb	KLM
06 Feb - 13 Feb	KLM
23 Feb - 02 Mar	KLM
22 Feb - 01 Mar	Air France
27 Feb - 06 Mar	KLM
26 Feb - 05 Mar	KLM
28 Feb - 07 Mar	KLM

Also check the deals for one-way flights from Chicago to Porto in February.

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 Porto

Cheap car rent in Porto

Cheapest return flights from Chicago to Porto in February from 389€

Return flights