Flights from Chicago to London
O'Hare International (ORD) → Heathrow Airport (LHR)
8h 05m
Nonstop average6345 km
Air route corridorApril - June & September - October (Optimal climate)
Pleasant weather$0.00
Zero commissionRoute Overview: Chicago to London
Cheap flights from Chicago (ORD) to London (LHR). Compare United Airlines, American Airlines fares from $439 with 0% fees on Prymeo.
Prymeo aggregates real-time flight availability directly from both low-cost carriers and legacy full-service airlines. When searching for tickets between O'Hare International and Heathrow Airport, our technology checks multiple booking systems in parallel so you never miss a flash sale or promotional discount.
Direct Carriers on This Corridor
Frequently Asked Questions About This Route
How long is the flight from Chicago to London?
The nonstop flight takes approximately 8h 05m, traversing 6345 km.
How far in advance should I book my flight?
For the best rates, we recommend booking between 3 to 6 weeks before your desired departure date, particularly during peak summer and holiday seasons.
Does Prymeo charge booking fees?
No. Prymeo is completely free. We redirect you directly to the airline or certified agency at zero extra markup.
Book Your Ticket
Real-time ticket search across 700+ airlines with instant e-ticket issuance.
Search ORD → LHRTransparent airline baggage rules
Flexible ticket cancellation options
Backed by Lucebra Global Intelligence
Popular Routes Connected to Chicago & London
Explore alternative departures, return legs, and connecting city pairs with verified low fares.