How long is the flight from Chicago to London?

Non-stop flights on ORD → LHR are typically around 8 hours. Connecting itineraries add 3–8 hours depending on the hub and layover.

Which airlines fly from Chicago to London?

The main carriers on this route are British Airways, United, American. Codeshare and one-stop options add several more — the filter panel above shows every airline in the current fare set.

When is the cheapest time to fly from Chicago to London?

Historically the lowest fares land in January, February, November. Summer (mid-June through mid-August) and the Christmas / New Year window are always peak. Mid-week departures (Tuesday–Thursday) typically beat weekend prices by 10–20%.

How far ahead should I book Chicago to London?

Six to ten weeks ahead is the sweet spot for this route. Inside three weeks, fares tend to spike as airlines sell to last-minute business travellers. Award availability often opens 10–11 months out if you're booking on miles.

Can I book directly on destination.com?

The Book button on each fare opens the airline or OTA (Trip.com, Kiwi, Expedia, Booking, Priceline, etc.) that's actually selling that ticket. You complete payment there at the same price you saw here — we never add a markup.

ORD → LHR

Chicago to London flights.

Live cached fares on Chicago (ORD) → London (LHR), refreshed every 30 minutes. Non-stop and connecting itineraries side by side — compare airlines, times and stops, then book in one click.

Flying time
~8h non-stop
Airlines
British Airways, United, American
Cheapest months
January, February, November

Flex dates · cheapest nearby

Loading prices…

Read our best-time-to-book guide for ORD → LHR →Target price, booking window, weekday pattern.

See 30-day price history for ORD → LHR →Median fare, lows, and best-day patterns.

No cached fares for exactly 2026-12-06 → 2026-12-13. Showing recent fares on ORD → LHR — pick a different date in the calendar above or run a live search.

Chicago → London · 8 fares12-month low · $455

Cached from Travelpayouts · filter & sort below

We check this route daily and email you when it drops. Free.

Try a nearby airport

Thin routes often have more options from a neighbouring airport.

Chicago (MDW) → London (LHR)

nearby origin

Chicago (ORD) → London (LGW)

nearby destination

Chicago (ORD) → London (STN)

nearby destination

About Chicago → London

4-5 daily non-stops from ORD. United's international hub means easy one-stops via ORD from the Midwest.

Typical non-stop flying time is around 8 hours. Major carriers on this route include British Airways, United, American. Fares are usually cheapest in January, February, November — book 6–10 weeks ahead and avoid school-holiday peaks (late June–August, Christmas–New Year) for the best pricing.

Month-by-month price guide: Chicago to London

Live cheapest round-trip fare cached on ORD → LHR for each of the next 12 months. Tap any month and run a live search to confirm.

Oct
Shoulder
from $789
Nov
Low
from $455
Dec
Peak
from $1421
Jan
Low
from $759
Feb
No data
Mar
No data
Apr
No data
May
Low
from $545
Jun
No data
Jul
No data
Aug
No data
Sep
No data

Cheapest next 12 months: November from $455 round-trip. Run a live search →

Booking window tip

Medium-haul is the classic 6-10 week booking window. Fares drift down as the departure gets closer until about 21 days out, then start climbing fast. Tuesday and Wednesday departures are typically 10-18% cheaper than Friday or Sunday.

Watch this route

Email me when Chicago → London drops.

One email per route, only when fares actually move. Set a ceiling if you only want to hear about big drops.

Also text me when it drops — fastest alert

You’ll get this route’s drop alerts, plus the Thursday Dispatch and the Sunday Read. We’ll never share your email. Unsubscribe in any send.

Where to stay

Once you’ve booked the flight, pick a London neighbourhood.

See where to stay in London →

Questions, answered

How long is the flight from Chicago to London?
Non-stop flights on ORD → LHR are typically around 8 hours. Connecting itineraries add 3–8 hours depending on the hub and layover.
Which airlines fly from Chicago to London?
The main carriers on this route are British Airways, United, American. Codeshare and one-stop options add several more — the filter panel above shows every airline in the current fare set.
When is the cheapest time to fly from Chicago to London?
Historically the lowest fares land in January, February, November. Summer (mid-June through mid-August) and the Christmas / New Year window are always peak. Mid-week departures (Tuesday–Thursday) typically beat weekend prices by 10–20%.
How far ahead should I book Chicago to London?
Six to ten weeks ahead is the sweet spot for this route. Inside three weeks, fares tend to spike as airlines sell to last-minute business travellers. Award availability often opens 10–11 months out if you're booking on miles.
Can I book directly on destination.com?
The Book button on each fare opens the airline or OTA (Trip.com, Kiwi, Expedia, Booking, Priceline, etc.) that's actually selling that ticket. You complete payment there at the same price you saw here — we never add a markup.

Other ways to reach London

If your plans are flexible on the origin, these alternate departure airports also serve London on the routes we track.

Other popular routes

Keep planning

Complete your London trip

Trip plannerLondon one-stop planTours, transfers, packages, and events for London in one place.StaysWhere to stay in LondonNeighborhood-by-neighborhood picks with live nightly rates.ExperiencesThings to do in LondonCurated sights, food, nightlife, and tours across every district.Getting thereCheap flights to LondonUS gateway fares with the months each route bottoms out.NeighborhoodsLondon by districtLongform breakdowns of where locals eat, drink, and sleep.When to goBest time to visit United KingdomMonth-by-month verdicts on weather, crowds, and prices.