$390 Find Cheap Flights from Chicago to Kos - Compare and Save

In the last 5 days, the lowest price for a flight from Chicago O'Hare Intl Airport to Kos was $983 for a round-trip ticket.

Yes, you'll most likely have to show a valid passport before boarding the plane in Chicago and on arrival in Kos.

Chicago airport is called Chicago O'Hare Intl and the only airport in Kos is Kos.

We unfortunately don’t have that data for this specific route.

KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Chicago to Kos.

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Kos from Chicago is likely to change within 7 days, so travelers know whether to wait or book now.

Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Kos with an airline and back to Chicago with another airline. Booking your flights between Chicago and KGS can sometimes prove cheaper using this method.

Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Kos from Chicago up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.