[11/20/2017 @ 2:00 PM CT] Almost all of these destinations are now being matched by United or Delta. If you don’t see an AA fare, try a competitor.
American Airlines and Oneworld partners have round-trip flights from Chicago (ORD) to Many cities in Europe (see list in the full blog post) for $405-$575. Flights mostly on the weekdays from January to March. Holiday blackouts apply. Flight may operate as a Oneworld code-share. Expect prices to fluctuate +/- $45.