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…

No cached fares for exactly 2026-06-08 → 2026-06-15. Showing recent fares on ORD → LHR — pick a different date in the calendar above or run a live search.

Chicago → London · 14 fares

Cached from Travelpayouts · filter & sort below

Showing 14 of 14 results

Cheapest
Spirit · NK 350
OutboundORD → LHRTue, Jun 9 · 6:49 PM· 11h 16m· 2 stops
$442
one-way
Book →
Spirit · NK 350
OutboundORD → LHRWed, Jun 10 · 6:49 PM· 11h 11m· 2 stops
$467
one-way
Book →
Air Canada · AC 508
OutboundORD → LHRMon, Jun 22 · 8:45 PM· 10h 1m· 2 stops
$585
one-way
Book →
H4 · H4 104
OutboundORD → LHRSun, Jun 28 · 6:20 PM· 15h 30m· 2 stops
$629
one-way
Book →
Icelandair · FI 856
OutboundORD → LHRMon, May 4 · 3:25 AM· 9h 20m· 1 stop
ReturnLHR ← ORDMon, May 11 · 8:25 PM· 10h· 1 stop
$722
total round-trip
Book →
Icelandair · FI 852
OutboundORD → LHRThu, Apr 30 · 12:25 AM· 9h 25m· 1 stop
ReturnLHR ← ORDWed, May 6 · 12:05 PM· 10h· 1 stop
$761
total round-trip
Book →
Icelandair · FI 852
OutboundORD → LHRFri, Aug 21 · 12:25 AM· 9h 30m· 1 stop
ReturnLHR ← ORDThu, Aug 27 · 12:05 PM· 10h· 1 stop
$876
total round-trip
Book →
Air Canada · AC 8548
OutboundORD → LHRMon, Jun 15 · 12:25 PM· 9h 12m· 2 stops
ReturnLHR ← ORDSat, Jun 20 · 1:10 PM· 10h 50m· 2 stops
$940
total round-trip
Book →
TAP Portugal · TP 244
OutboundORD → LHRSat, Jun 27 · 11:05 PM· 10h 55m· 1 stop
ReturnLHR ← ORDSat, Jul 11 · 6:50 PM· 12h 10m· 1 stop
$1,074
total round-trip
Book →
Turkish Airlines · TK 6
OutboundORD → LHRMon, Jun 29 · 1:10 AM· 14h 40m· 1 stop
ReturnLHR ← ORDMon, Jul 6 · 9:40 PM· 14h 50m· 1 stop
$1,205
total round-trip
Book →
Air Canada · AC 8912
OutboundORD → LHRWed, Jul 1 · 10:35 PM· 11h 50m· 2 stops
ReturnLHR ← ORDMon, Jul 13 · 7:30 AM· 9h 51m· 1 stop
$1,296
total round-trip
Book →
Icelandair · FI 852
OutboundORD → LHRSat, May 30 · 12:25 AM· 9h 30m· 1 stop
ReturnLHR ← ORDMon, Jun 1 · 12:05 PM· 10h· 1 stop
$1,296
total round-trip
Book →
TAP Portugal · TP 244
OutboundORD → LHRSat, Dec 19 · 2:10 AM· 10h 55m· 1 stop
ReturnLHR ← ORDSun, Jan 3 · 5:30 PM· 11h 15m· 1 stop
$1,319
total round-trip
Book →
SAS · SK 944
OutboundORD → LHRSun, Dec 20 · 1:20 AM· 11h 50m· 2 stops
ReturnLHR ← ORDSun, Jan 3 · 7:30 PM· 11h 5m· 1 stop
$1,387
total round-trip
Book →

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.

Apr
Low
from $761
May
Low
from $722
Jun
Shoulder
from $940
Jul
Peak
from $1296
Aug
Low
from $876
Sep
No data
Oct
No data
Nov
No data
Dec
Peak
from $1319
Jan
No data
Feb
No data
Mar
No data

Cheapest next 12 months: May from $722 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.

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.