Cheap flights from Poznan to Chicago

December is the cheapest month on this route, and fares for it sit alongside the rest of the calendar from September to December, then again in February and from April through July. Late summer and the run-up to autumn are the busiest stretch, when students and families fly back, so that is where prices climb. Midweek departures tend to cost less than Friday or Sunday flights, in both directions. Watch the weeks around Thanksgiving and Christmas, when Chicago fills with people visiting family, and the Polish holidays in early November and the run-up to the Christmas markets in Poznan, which lift demand on the way out of Poland.

The carriers on this route are network airlines and their regional partners rather than budget operators, so the real difference between them is the fare family, not the brand. LOT Polish Airlines, Lufthansa, Swiss, KLM Royal Dutch Airlines, Scandinavian Airlines and United Airlines are the names you are most likely to see, while KLM Cityhopper, Air Dolomiti, Helvetic Airways and Braathens Regional Aviation turn up on the shorter European legs. Nothing here flies nonstop, so expect at least one change of plane. A full-service fare normally includes a carry-on and often a checked bag, but cheaper fare families can leave the bag out, so read what your ticket covers before comparing prices.

Chicago has two airports on this route, and they are not interchangeable. O'Hare International lies well out to the northwest of the centre and is the larger of the two; Midway International sits closer in, on the southwest side, and is smaller and quicker to walk through. Both have trains, buses, taxis and ride-hailing into the city, and the journey from O'Hare is the longer of the two. Check which airport your ticket names before you arrange a pickup, and if your first landing in the United States is somewhere else, leave room there for border checks before the final hop to Chicago.

Currency

USD ($)

Power sockets

Type A, B · 120 V

Language

Samoan, Hawaiian, Chamorro, Carolinian, Spanish

Emergency number

911

Driving side

right

Calling code

+1

Internet domain

.us

Population of Chicago

2.7 M (2025)

Time zone

UTC-05 (America/Chicago)

Country facts: Wikidata

• Poznan flies from a single airport, Lawica, so the departure side is simple, and the connection is where an itinerary can go wrong.
• Confirm whether your fare includes a checked bag, because the cheapest connecting tickets often leave it out.
• Make sure both legs sit on one ticket, or leave a generous gap if you booked them separately.
• Check your passport and United States entry documents before you pay for anything.
• Decide whether O'Hare International or Midway International suits your plans, and how you will reach your accommodation from there.
• If December is your month, book early, since it is the cheapest month and the good connections go first.