ORD → LHR
Compare one-way, round-trip and flight + hotel packages from Chicago to London, a nonstop flight of about 8h 25m, with fares from around 440.
Chicago to London is an international route covering about 3,940 miles, arriving at Heathrow Airport (LHR) in United Kingdom. Peak travel season in London runs June–August (mild, long sunny days), while November–March is usually the quietest and best-value time to visit. The cheapest fares we've tracked on this route include at least one stop.
| Departing from | O'Hare International Airport (ORD) |
|---|---|
| Arriving at | Heathrow Airport (LHR) |
| Distance | 3,940 miles (6,344 km) |
| Nonstop flight time | About 8h 25m |
| Nonstop airlines seen | None in recent fares, expect 1 stop |
| Round-trip fares from | $440 (estimate) |
| Cheapest months | September, February, October |
| Peak season in London | June–August |
| Cheapest hotel months in London | November–March |
| Best time to book | 2 to 6 months ahead |
| Route info updated | October 16, 2026 |
June–August
Mild, long sunny days
April–May & September–October
Cool and crisp, fewer crowds
November–March
Cold, damp and grey
| Month | Fares from |
|---|---|
| January | $480 |
| February | $445 |
| March | $555 |
| April | $485 |
| May | $530 |
| June | $570 |
| July | $700 |
| August | $640 |
| September | $440 |
| October | $460 |
| November | $605 |
| December | $670 |
The cheapest fares we've tracked on this route include at least one stop. Ducoffs.com compares full-service and low-cost airlines flying between Chicago and London in a single search, including nonstop and one-stop options, so you can weigh price against total travel time.
Fares on this route tend to be lowest in September, February, and October. For the best selection, book about 2 to 6 months before departure and stay flexible by a day or two.
Chicago and London are about 3,940 miles apart. A nonstop flight takes roughly 8h 25m; connecting itineraries usually add 2 to 5 hours.
The best way to secure budget rates is by comparing multiple airlines simultaneously and checking flexible dates. Ducoffs.com scans available partner networks to bring you real-time pricing options.
Based on typical seasonal demand, September, February, and October tend to offer the lowest fares on this route, with estimated round-trip prices starting around $440. Live prices change daily, so run a search for your exact dates.
Chicago and London are about 3,940 miles apart. A nonstop flight takes roughly 8h 25m, while connecting itineraries usually add 2 to 5 hours depending on the layover.
The cheapest fares we've tracked recently on this route include at least one stop. Your live search shows any nonstop options available for your dates.
Hotel rates in London are usually lowest in November–March, when demand is quieter, and highest during peak season (June–August). Booking your flight and hotel together can save up to 30%.
This route arrives at Heathrow Airport (LHR). Your search results also show nearby airports when they offer a cheaper or faster option.
For this route, booking about 2 to 6 months before departure usually gives the best balance of price and seat selection. Mid-week departures are often cheaper than weekend flights.
Yes. Bundling your travel components can save you up to 30% compared to booking flights and hotels separately, as airlines and properties offer exclusive package discounts.
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