When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 17 days in advance, which can save you up to 5% on flights from Illinois to Costa Rica compared to booking the week you need them. Waiting 17 days out may not be for everyone, so we have options available for flights within the next two weeks, with the lowest price starting at $393. For sooner than that we have options available in the next 3 days from $422.
The best pricing can be found in the month of October. Prices to Costa Rica from Illinois average $404. You can even find prices in October for less than $404, as users have found deals to Costa Rica from as low as $205. The month of December appears to be one of the more expensive times to travel to Costa Rica from Illinois. Flying in the targeted month can save you up to 42%.