Flights from Chicago, IL to London, United Kingdom

Direct flights from Chicago, IL (ORD) to London, United Kingdom (LHR) take approximately 8h 23m. Connecting flights may add 2-4 hours depending on layover location. For the fastest journey, look for nonstop flights which are typically available on this popular route.

For the best prices on ORD to LHR flights, book 6-8 weeks in advance for domestic routes or 2-4 months ahead for international travel. Shoulder seasons (April-May, September-October) offer good weather and moderate prices. Peak season months (June, July) have higher prices, while January and February typically offer the best deals.

Tuesday and Wednesday departures are typically 15-25% cheaper than weekend flights on the ORD to LHR route. Saturday is usually the most expensive day to fly. For additional savings, consider red-eye flights or early morning departures, which often have lower fares and less crowded airports.

Major carriers on this route include American Airlines, United, and other domestic and international airlines. O'Hare is a major hub for both American and United. Check for connecting flight deals through Chicago.

O'Hare is a major hub for both American and United. Check for connecting flight deals through Chicago. Book flights that depart mid-morning or early afternoon for the smoothest experience - these times typically have shorter security lines and fewer delays.

The cheapest months to fly from ORD to LHR are typically January, February, November. Shoulder seasons (April-May, September-October) offer good weather and moderate prices. Avoid peak travel periods like June and July when prices can be 30-50% higher. Use Fly2Any's price alerts to get notified when fares drop.

Baggage allowances vary by airline and fare class. Most full-service carriers include one checked bag (up to 50 lbs) on this route. Budget carriers may charge live pricing for checked bags. All airlines allow one personal item free. Compare total costs including baggage fees when booking to get the best deal.

Yes, several airlines offer nonstop flights from ORD to LHR. Direct flights take approximately 8h 23m. If you're flexible with your schedule, connecting flights through major hubs like ATL or DFW may offer lower prices.