United, Delta, and American have round-trip flights from Chicago (ORD) to Paris (CDG) for $502-$522, NONSTOP. Flights November to March. Departures on Monday, Tuesday, Wednesday, and Sunday. 7-day minimum stay required.
Carry-on bag is allowed for free.
Note: There are “cheaper” flights on TAP for $414, but those fares require a connection and they charge about +$75 each-way to check a bag. After the fees and dealing with the extra stop, we don’t think those TAP fares are worthwhile. TAP fares are more expensive once you add the extra $150-ish and extra airport downtime to the base price.
Click for more details and booking links Nonstop Flights: Chicago to Paris $502-$522 r/t [November-March] (a better deal than TAP fares) – United / Delta / American