London to Chicago LCY, LGW, LHR, LTN, STN → ORD
London City Airport (LCY), London Gatwick Airport (LGW), London Heathrow Airport (LHR), London Luton Airport (LTN), Stansted Airport (STN) → O'Hare International Airport (ORD)
The cheapest return found recently is $1,417 with SWISS, 13 Nov – 20 Nov, found today.
Return
The cheapest return fare on each of 7 departure dates is usually $593 to $1,344.
Cheapest return found recently
$1,417
13 Nov – 20 Nov · SWISS
London City Airport (LCY) → O'Hare International Airport (ORD)
Leaves 9:15 a.m. · Return leaves 4:10 p.m. · 26 h 30 min of travel, both ways together
out 1 stop, back 1 stop
found today
Cheapest nonstop return
$484
18 Jan 2027 – 26 Jan 2027 · American Airlines
London Heathrow Airport (LHR) → O'Hare International Airport (ORD)
Leaves 4:30 p.m. · Return leaves 6:50 p.m. · 16 h 30 min of travel, both ways together
out nonstop, back nonstop
found 3 days ago
Found recently, and the cheapest we hold
$1,417 13 Nov – 20 Novfound todaySee prices for these dates
$484 18 Jan 2027 – 26 Jan 2027found 3 days agoSee prices for these dates
What have prices looked like?
Over 25 days, 24 Sept to 18 Oct, the cheapest return we saw each day was $484 to $979.
At $1,417, the cheapest return found recently is above that range.
25 days is a short history, so treat this range as an early guide.
Those were the prices on those days, not today's.
Is this a good return price?
Compared with the cheapest return fare on each of 7 departure dates from 5 Nov to 31 Mar 2027, found by travelers' searches in the last 7 days (economy, the price the seller showed on Aviasales). The usual range is the middle half of those prices.
Could nearby dates be cheaper?
We hold no other 7-night return fares leaving within 3 days of 13 Nov to compare.
Every date we hold
17 fares on 7 departure dates
See the chart as a table
| Dates | From | Airline | Airports | Stops | Found | |
|---|---|---|---|---|---|---|
| 5 Nov – 15 Nov | $551 | Ryanair | Stansted Airport (STN) → O'Hare International Airport (ORD) | out 2 stops, back 2 stops | found 4 days ago | See prices for these dates |
| 13 Nov – 20 Nov | $1,417 | SWISS | London City Airport (LCY) → O'Hare International Airport (ORD) | out 1 stop, back 1 stop | found today | See prices for these dates |
| 18 Nov – 2 Dec | $634 | TAP Air Portugal | London Heathrow Airport (LHR) → O'Hare International Airport (ORD) | out 1 stop, back 1 stop | found 4 days ago | See prices for these dates |
| 16 Dec – 17 Dec | $1,845 | British Airways | London City Airport (LCY) → O'Hare International Airport (ORD) | out 1 stop, back 1 stop | found yesterday | See prices for these dates |
| 18 Jan 2027 – 26 Jan 2027 | $484 | American Airlines | London Heathrow Airport (LHR) → O'Hare International Airport (ORD) | out nonstop, back nonstop | found 3 days ago | See prices for these dates |
| 22 Mar 2027 – 1 Apr 2027 | $822 | Icelandair | London Heathrow Airport (LHR) → O'Hare International Airport (ORD) | out 1 stop, back 1 stop | found 3 days ago | See prices for these dates |
| 31 Mar 2027 – 5 Apr 2027 | $1,271 | Aer Lingus | London City Airport (LCY) → O'Hare International Airport (ORD) | out 1 stop, back 1 stop | found 6 days ago | See prices for these dates |
Which month looks cheapest?
January 2027 is the cheapest month — from $484.
Airlines on the cheapest dates: Ryanair, SWISS, TAP Air Portugal, British Airways, American Airlines, Icelandair, Aer Lingus.
Premium cabin fares from London to Chicago
We hold no premium economy, business or first-class fares for this route: we collect them for the busiest routes, and this one is not among them yet.
Today's prices for 13 Nov – 20 Nov in another cabin: Premium economy · Business · First
How far ahead were prices cheapest for London to Chicago?
Return
Fares 90 to 179 days before departure were typically 36% lower than 14 to 29 days before departure.
From the cheapest return each day between 24 Sept and 18 Oct (25 days), grouped by how many days ahead the flight left; one adult in economy.
Each range covers different departure dates, so this compares typical fares, not the same trip priced twice.
Prices reflect recent searches — current fares may differ.
See these ranges as a table
| Booked ahead by | Typical fare | Cheapest day | Above the cheapest | Days of prices |
|---|---|---|---|---|
| 14–29 days | $979 | $551 | +57% | 12 |
| 30–59 days | $634 | $504 | +1% | 21 |
| 90–179 days | $625 | $484 | Cheapest seen | 11 |
Live price for these dates
The cheapest return found recently is for 13 Nov – 20 Nov. A live search on this page shows what those dates cost now, for one adult in economy.
Prices are what travelers' searches on Aviasales found in the last 7 days, in US dollars: the price the seller showed on Aviasales; bags may cost extra. Fares change, so check today's price before you book. How our prices work