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Chicago O Hare International
Minimum Connection Times (MCT) & Transfer Risk
Minimum Connection Time represents the shortest schedule buffer airlines can legally ticket for layovers. At Chicago O Hare International, real transfer times depend heavily on whether your arrival and departure share a single concourse or require changing terminals.
Domestic MCT
45 min
Published minimum for domestic-to-domestic transfers on same ticket. Recommended real-world buffer: 65 min.
International MCT
90 min
Published minimum for international transfers. Recommended real-world buffer: 120 min.
Terminal Change Risk
high Risk
Terminal changes often require exiting security or long bus shuttles.
Transit System
ATS train
Dedicated transit infrastructure connecting passenger concourses.
Security & Border Clearance Rules
Airside Transit
Transfers between select terminals require leaving sterile security area.
Security Re-screening
Mandatory security re-clearing common for connecting passengers, especially across terminal boundaries.
Passport & Customs Re-clear
International arrivals must clear border control / customs before proceeding to domestic connecting flights.
Overnight Friendly
Limited overnight services; landside hotel booking recommended for layovers over 6 hours.
Terminal Navigation & Transit Guidance
Terminal 5 (international arrivals/departures) is physically separate from T1/T2/T3. Transferring between T5 and domestic terminals requires exiting sterile area and reclearing TSA.
Hub Airlines & Network Connectivity
Chicago O Hare International hosts 48 scheduled passenger airlines flying to over 280 destinations worldwide.
Primary Home & Base Hub Airlines:
Aircraft & Seat Maps
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Explore Seat Maps →Points & Miles Value
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Calculate Points →Alternative Catchment Airports Nearby
Before booking your trip to or from Chicago, compare prices across adjacent regional catchment airports. Fares can differ by hundreds of dollars depending on which airport you choose.
Chicago Midway (MDW)
18 mi
Compare fares and route schedules across both airports simultaneously on Wayzuno.
Search Flights from MDW →Official Connecting Authority Reference
Chicago Department of Aviation - O'Hare
Verified records retrieved: 2026-09-01