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October is part of Costa Rica's green season, which means frequent afternoon and evening showers around San José. Travelers departing from Juan Santamaría International Airport (SJO) should expect wetter roads and slightly longer ground transfer times to and from downtown San José. Nonstop SJO–O'Hare International Airport (ORD) flights may be seasonal; check airline schedules in October and book early to secure direct options. For cheaper October fares, target mid-week departures, sign up for fare alerts, and consider flexible dates. CTAs: Compare nonstop and connecting SJO to ORD flights now and book early to lock in best prices for October travel.
October arrivals at O'Hare International Airport (ORD) mean crisp fall air and high demand around event weekends like the Chicago Marathon and film festival. Use the CTA Blue Line for a fast trip to downtown Chicago or consider rideshares and airport shuttles for door-to-door service. If you’re coming from Juan Santamaría International Airport (SJO), plan for customs and potential jet-lag adjustments; carry layered clothing for Chicago's variable October temperatures. CTA and Metra options also make ORD a good gateway to Milwaukee, Aurora, and suburban business centers. CTA: Book your O'Hare transfers and check local events when planning your October itinerary.