Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Chicago O'Hare Intl Airport to Cardiff as you normally would.
The best pricing can be found in the month of March. Prices to Cardiff from Chicago O'Hare Intl Airport average $720. You can even find prices in March for less than $720, as users have found deals to Cardiff from as low as $522. The month of February appears to be one of the more expensive times to travel to Cardiff from Chicago O'Hare Intl Airport. Flying in the targeted month can save you up to 72%.