Flights Chicago → London — September 14, 2026

One way · Economy · 1 adult · price per person

The cheapest itinerary observed for Monday, September 14, 2026 on the Chicago–London route: 2 stops itinerary (3 flights) via Atlanta Hartsfield-Jackson (ATL) and Newark Liberty (EWR), from Chicago O'Hare (ORD) to London Heathrow (LHR), first flight Frontier Airlines F91596, departs 10:26 AM, arrives 9:25 PM the next day, total travel time 28h 59m including layovers, flight time 11h 23m (layovers excluded), $549 per person. Fare as listed by Aviasales: carry-on bag not included (personal item only), checked bag not included, changes not allowed, non-refundable. Price found in an Aviasales search on September 8, 2026 and read by AirSource on September 10, 2026, 19:00 UTC: it is not guaranteed and is confirmed on Aviasales at booking time. The cheapest direct flight observed: United Airlines UA920, from Chicago O'Hare (ORD) to London Heathrow (LHR), departs 6:05 PM, arrives 8:30 AM the next day, direct, 8h 25m, $784 per person. Fare as listed by Aviasales: carry-on bag not included (personal item only), checked bag not included, changes allowed for a fee, non-refundable.