Route · LHR → ORD
Flights from London to Chicago
The London Heathrow–Chicago O'Hare corridor is one of the busiest transatlantic arteries, covering roughly 6,344 km with a typical westbound block time of around seven hours forty-eight minutes, while the eastbound leg often runs closer to eight and a half hours against the jet stream. American Airlines, United, Iberia, and Lufthansa all operate the route, typically deploying widebody equipment such as the Boeing 777, 787 Dreamliner, or Airbus A330, with American and United offering the most frequencies. A practical note worth flagging: both carriers primarily use Heathrow Terminal 3, so passengers connecting from a Terminal 5 British Airways feeder should allow generous transfer time. Chicago O'Hare clears most international arrivals through its dedicated customs hall, which can run slow during peak afternoon waves. On the fare side, January through March typically yields the softest transatlantic prices, while business-class redemption availability often opens up on midweek departures outside the summer peak.
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Cheapest dates to fly
Live prices · powered by AviasalesThe calendar below pulls live fares from our search partner for London (LHR) → Chicago (ORD). Use the year view… to spot the cheapest week to fly, the day-of-week patterns most travellers miss, and any shoulder-season dips worth shifting your trip around. Prices refresh every few hours, so what you see is what your booking page should look like a moment later — click any date to jump straight to the fare on Aviasales.
Airlines on this route
4 carriersThe 4 carriers we currently track on the London–Chicago route, from full-service flag carriers to low-cost competitors. Tap any airline for its full profile, baggage… rules, fleet context, and a live fare search pre-filtered to that carrier — useful if you're loyal to a frequent-flyer programme, want to compare onboard product on the same dates, or are weighing a cheaper one-stop against a pricier nonstop.
Flights from London to Chicago
Live schedule · powered by AviasalesBelow is the published weekly schedule for nonstop and one-stop services from London to Chicago — the actual flight numbers, departure and arrival times your… booking page will pull from. Use it to plan around departure preferences (early morning vs late evening), see which carriers fly on which weekdays, or pick a connection that lets you sleep in your own bed before a long-haul leg. Click any row to load it directly in the search.
Airport guides
Quick links into the airport profiles at both ends of the route. Each guide covers terminal layout, the airlines that base hubs at LHR and… ORD, the other routes those airports serve, and the ground-transit options most travellers wish they'd read about before landing — the practical context you only really need to know once you've booked, but want to skim before you do.