Cheap Flights from London to Chicago — $315

Heathrow (LHR) is London’s main international hub, serving numerous long-haul and premium carriers alongside some full-service European airlines. It’s usually perceived as mid-to-upper range on fares, with a wide choice of lounges and services for business travellers. Located about 25 km west of central London, typical transport options include the Heathrow Express to Paddington (15–20 minutes, higher fares), the Elizabeth Line (25–30 minutes, moderate fares), London Underground’s Piccadilly Line (50–60 minutes, budget fares) and taxis or ride-hail (30–60 minutes depending on traffic). Pros: fast rail links and extensive amenities; cons: busy terminals and peak-time congestion.

In different months, ticket prices from London to Chicago vary: minimum — $381 (July 2026), maximum — $448 (October 2026). Typically, the flight costs $418–$437.

Chicago is primarily served by O’Hare International (ORD) and Midway International (MDW). O’Hare is the city’s main international and connecting hub, typically hosting legacy carriers and many international flights; fares can be mid-to-high depending on demand. It sits about 17 miles northwest of downtown; travelers usually reach downtown in 30–60 minutes by CTA Blue Line train (roughly $3–6) or by taxi/ride-share in 30–50 minutes with higher fares. Midway, about 10 miles southwest, is often a budget- and leisure-oriented airport with a strong presence of low-cost carriers and point-to-point domestic flights; travel times to downtown are typically 25–45 minutes via CTA Orange Line or 25–40 minutes by car. O’Hare offers extensive amenities and connections but can be busy and spread out; Midway is generally easier to navigate and quicker for domestic trips but has fewer international services.

The route London — Chicago is served by many carriers — 8 in total, including United Airlines, British Airways, American Airlines, Ryanair, Wizz Air, LC Busre SAC, Westjet, and Aer Lingus. This gives passengers wide opportunities: from finding the lowest fare (from $315) to selecting flights by schedule or service class. Our service aggregates data from multiple booking systems so you can compare offers in one place. This saves time and money: no need to check dozens of sites — just pick the right option and book online.