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United Airlines · Route guide

United Airlines: ORD (Chicago O'Hare) to LHR (London) Route Insights

Everything you need to fly Chicago O'Hare to London: when to go, who flies it, what it costs, and how to land well.

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6 airlines on this route · Multiple daily departures

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Airline

United Airlines

Service

Multiple daily departures

Region

North America to Europe

The route

Welcome to your comprehensive guide for the United Airlines route from Chicago O'Hare (ORD) to London Heathrow (LHR). This popular transatlantic flight connects two major global hubs, offering multiple daily departures. On average, the flight duration is approximately 7 hours and 50 minutes to 8 hours and 25 minutes for direct flights. United Airlines is a major carrier on this route, utilizing aircraft like the Boeing 767-300. Chicago O'Hare serves as a significant hub for United, providing extensive facilities including the renowned Polaris lounge for eligible passengers.

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Airports

Taking off, touching down.

Check-in, security, connections and getting into town at both ends of the flight.

Departure

Chicago O'Hare (ORD)

ORD

Check-in: O'Hare is a major United hub — the standard international buffer applies, and the Polaris lounge is available for eligible passengers.
Security: Security wait times vary by terminal and time of day at this large airport.
Connections: The CTA Blue Line connects ORD directly to downtown Chicago.

Arrival

London Heathrow (LHR)

LHR

On arrival: Confirm your arrival terminal ahead of time — Heathrow's terminals are organized by airline/alliance.
Ground transport: The Heathrow Express reaches Paddington in 15 minutes; the Elizabeth line is a cheaper, slower option.
Planning ahead: UK Border Force queues can run long at peak long-haul arrival banks.

Timing & fares

When it flies, what it costs.

Fares & booking

Booking window: With multiple daily departures, 6-8 weeks ahead is generally enough outside summer peak.
Cabin advice: United Polaris business class offers lie-flat seating and direct-aisle access on this route's wide-body service.
Peak pricing: Summer (Jun-Aug) is the highest-demand window on this corridor.

Tours and experiences at either end

Vetted day trips and activities in London and Chicago O'Hare, through our travel partner.

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When to fly

Best Time to Fly ORD (Chicago O'Hare) to LHR (London)

The cheapest month to fly from Chicago to London is typically January, with prices potentially ranging from $510 to $750 for a round trip. February is also often cited as an affordable month. Booking in advance, generally at least two months for international flights, and being flexible with your travel dates can help secure better fares. Some data suggests flying on a Thursday can be cheaper than on a Sunday. Peak travel times, like summer (June-August) and during major holidays, tend to be more expensive.

Field notes

Travel Tips for the ORD (Chicago O'Hare)-LHR (London) Route

01
Book in Advance: Especially for international flights, booking at least 2 months ahead can lead to significant savings.
02
Consider Daytime Flights: Some travelers prefer daytime flights from Chicago to London to potentially reduce jet lag upon arrival.
03
Pack Essentials for a Long Flight: Expect around two meals on an 8-hour flight; consider bringing your own snacks and entertainment.
04
Navigating Heathrow: From Heathrow, the Piccadilly Line on the Tube offers a direct route to central London. Allow ample time for customs and immigration.
05
Lounge Access: If flying United Polaris business class, take advantage of the United Polaris lounge at ORD, located in Terminal 1, Concourse C, near gate C18, which has recently been renovated and expanded.

Carriers

Airlines Flying ORD (Chicago O'Hare) to LHR (London)

United Airlines

Multiple daily direct flights. United operates approximately 21 nonstop flights per week on this route.

American Airlines

Offers around 21 nonstop flights per week.

British Airways

Provides approximately 21 nonstop flights weekly.

Lufthansa

Offers flights on this route, often with connections.

Air Canada

Provides connecting flights between Chicago and London.

Aer Lingus

Operates flights, typically with a stop in Dublin.

FAQ

Common questions.

Straight answers about flying Chicago O'Hare to London.

How long is the flight from Chicago to London?

Typically around 7 hours 50 minutes to 8 hours 25 minutes, per the route's published schedule.

What aircraft does United use?

United has used the Boeing 767-300 on this route — check your specific booking.

Do I need a UK ETA?

Most visitors now need to arrange a UK ETA in advance — check current requirements before travel.

Keep exploring

Where to next.

Countries & layovers

Chicago layover guide London layover guide

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