Cheap flights from Chicago to London from $484 MDW, ORD → LCY, LGW, LHR, LTN, SEN, STN
Chicago Midway International Airport (MDW), O'Hare International Airport (ORD) → London City Airport (LCY), London Gatwick Airport (LGW), London Heathrow Airport (LHR), London Luton Airport (LTN), London Southend Airport (SEN), Stansted Airport (STN)
The cheapest return found recently is $687 with SAS Scandinavian, 11 Feb 2027 – 23 Feb 2027, found 2 days ago. The cheapest one-way found recently is $484 with Frontier Airlines, 12 Dec, found 4 days ago.
- Cheapest one-way found recently
- $484, found 4 days ago
- Cheapest return found recently
- $687, 11 Feb 2027 to 23 Feb 2027
- Usual return price
- $733 to $1,227
- Cheapest month to fly
- February 2027, return fares from $687 found in the last 7 days
- Airlines with nonstop flights
- Iberia, British Airways, American Airlines
Return
The cheapest return fare on each of 8 departure dates is usually $733 to $1,227.
Cheapest return found recently
$687
11 Feb 2027 – 23 Feb 2027 · SAS Scandinavian
O'Hare International Airport (ORD) → London Heathrow Airport (LHR)
Leaves 7:10 p.m. · Return leaves 10:20 a.m. · 28 h 55 min of travel, both ways together
out 1 stop, back 1 stop · via Copenhagen Airport (CPH) · 6 h connection
found 2 days ago
Cheapest nonstop return
$946
11 Feb 2027 – 23 Feb 2027 · American Airlines
O'Hare International Airport (ORD) → London Heathrow Airport (LHR)
Leaves 6:50 p.m. · Return leaves 9:30 p.m. · 16 h 40 min of travel, both ways together
out nonstop, back nonstop
found 2 days ago
Found recently, and the cheapest we hold
$687 11 Feb 2027 – 23 Feb 2027found 2 days agoSee prices for these dates
It is also the cheapest return we hold, of any age.
What have prices looked like?
Over 49 days, 24 Sept to 11 Nov, the cheapest return we saw each day was $342 to $735.
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 8 departure dates from 14 Nov to 29 Apr 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 12-night return fares leaving within 3 days of 11 Feb 2027 to compare.
Every date we hold
97 fares on 8 departure dates
See the chart as a table
| Dates | From | Airline | Airports | Stops | Found | |
|---|---|---|---|---|---|---|
| 14 Nov – 20 Nov | $805 | SAS Scandinavian | O'Hare International Airport (ORD) → London Heathrow Airport (LHR) | out 1 stop, back 1 stop | found 6 days ago | See prices for these dates |
| 17 Nov – 24 Nov | $738 | Icelandair | O'Hare International Airport (ORD) → London Gatwick Airport (LGW) | out 1 stop, back 1 stop | found 7 days ago | See prices for these dates |
| 9 Dec – 15 Jan 2027 | $717 | Icelandair | O'Hare International Airport (ORD) → London Gatwick Airport (LGW) | out 2 stops, back 2 stops | found 4 days ago | See prices for these dates |
| 12 Dec – 22 Dec | $1,635 | Frontier Airlines | Chicago Midway International Airport (MDW) → London Heathrow Airport (LHR) | out 2 stops, back 2 stops | found 4 days ago | See prices for these dates |
| 17 Dec – 4 Jan 2027 | $1,275 | Frontier Airlines | O'Hare International Airport (ORD) → London Gatwick Airport (LGW) | out 1 stop, back 3 stops | found 2 days ago | See prices for these dates |
| 21 Dec – 27 Dec | $1,211 | Aer Lingus | O'Hare International Airport (ORD) → London Gatwick Airport (LGW) | out 1 stop, back 1 stop | found 6 days ago | See prices for these dates |
| 11 Feb 2027 – 23 Feb 2027 | $687 | SAS Scandinavian | O'Hare International Airport (ORD) → London Heathrow Airport (LHR) | out 1 stop, back 1 stop | found 2 days ago | See prices for these dates |
| 29 Apr 2027 – 1 May 2027 | $831 | British Airways | O'Hare International Airport (ORD) → London Heathrow Airport (LHR) | out 1 stop, back 1 stop | found 4 days ago | See prices for these dates |
Which month looks cheapest?
February 2027 is the cheapest month — from $687.
Airlines on the cheapest dates: SAS Scandinavian, Icelandair, Frontier Airlines, Aer Lingus, British Airways.
One-way
Not enough comparable prices yet for a usual one-way price.
Cheapest one-way found recently
$484
12 Dec · Frontier Airlines
Chicago Midway International Airport (MDW) → London Heathrow Airport (LHR)
Leaves 12:28 p.m. · 40 h 22 min trip
3 stops
found 4 days ago
Cheapest nonstop one-way
None seen yet.
Found recently, and the cheapest we hold
$484 12 Decfound 4 days agoOpen this trip
$300 2 Mar 2027found 6 days agoOpen this trip
What have prices looked like?
Over 44 days, 24 Sept to 11 Nov, the cheapest one-way we saw each day was $287 to $555.
Those were the prices on those days, not today's.
Is this a good one-way price?
Not enough comparable prices yet: we hold one-way fares on 2 departure dates and need at least 3 to say what is usual.
Could nearby dates be cheaper?
We hold no other one-way fares leaving within 3 days of 12 Dec to compare.
Every date we hold
3 fares on 2 departure dates
See the chart as a table
| Dates | From | Airline | Airports | Stops | Found | |
|---|---|---|---|---|---|---|
| 12 Dec | $484 | Frontier Airlines | Chicago Midway International Airport (MDW) → London Heathrow Airport (LHR) | 3 stops | found 4 days ago | Open this trip |
| 2 Mar 2027 | $300 | Icelandair | O'Hare International Airport (ORD) → London Heathrow Airport (LHR) | 1 stop | found 6 days ago | Open this trip |
Which month looks cheapest?
March 2027 is the cheapest month — from $300.
Airlines on the cheapest dates: Frontier Airlines, Icelandair.
Premium cabin fares from Chicago to London
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 11 Feb 2027 – 23 Feb 2027 in another cabin: Premium economy · Business · First
Today's prices for 12 Dec in another cabin: Premium economy · Business · First
How far ahead were prices cheapest for Chicago to London?
Return
The cheapest fares were 30 to 59 days before departure.
From the cheapest return each day between 24 Sept and 11 Nov (49 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 |
|---|---|---|---|---|
| 0–6 days | $718 | $695 | +0% | 16 |
| 7–13 days | $784 | $697 | +9% | 18 |
| 14–29 days | $728 | $644 | +2% | 32 |
| 30–59 days | $717 | $565 | Cheapest seen | 46 |
| 60–89 days | $941 | $514 | +31% | 21 |
| 90–179 days | $777 | $485 | +8% | 25 |
| 180+ days | $814 | $342 | +14% | 24 |
One-way
Fares 90 to 179 days before departure were typically 6% lower than 30 to 59 days before departure.
From the cheapest one-way each day between 24 Sept and 11 Nov (44 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 |
|---|---|---|---|---|
| 30–59 days | $322 | $298 | +7% | 13 |
| 60–89 days | $308 | $287 | +2% | 22 |
| 90–179 days | $302 | $300 | Cheapest seen | 16 |
| 180+ days | $359 | $307 | +19% | 22 |
Could a nearby airport be cheaper?
A different airport at either end can change the fare — sometimes a lot.
One-way
South Bend → London
116 km from Chicago
$328
$156 less than flying from Chicago
2 Mar 2027 · SBN → LHR · 1 stop
found 6 days ago
Cheapest recent price on each route — one way, per traveler in Economy. Distances are in a straight line.
Live price for these dates
The cheapest return found recently is for 11 Feb 2027 – 23 Feb 2027. A live search on this page shows what those dates cost now, for one adult in economy.
Questions about this trip
How much is a return flight from Chicago to London?
The cheapest return found recently is $687 with SAS Scandinavian, 11 Feb 2027 to 23 Feb 2027, found 2 days ago. The cheapest return fare on each of 8 departure dates is usually $733 to $1,227.
How much is a one-way flight from Chicago to London?
The cheapest one-way found recently is $484 with Frontier Airlines, 12 Dec, found 4 days ago. The cheapest one-way we hold, of any age, is $300 with Icelandair, 2 Mar 2027, found 6 days ago.
What is the cheapest month to fly from Chicago to London?
February 2027 is the cheapest month for a return, from $687, 11 Feb 2027 to 23 Feb 2027, found 2 days ago. March 2027 is the cheapest month for a one-way, from $300, 2 Mar 2027, found 6 days ago.
How far ahead should I book a flight from Chicago to London?
In 49 days of prices between 24 Sept and 11 Nov, return fares were cheapest 30 to 59 days before departure. In 44 days of prices between 24 Sept and 11 Nov, one-way fares 90 to 179 days before departure were typically 6% lower than 30 to 59 days before departure.
Is there a direct flight from Chicago to London?
Yes, the cheapest nonstop return found recently is $946 with American Airlines, 11 Feb 2027 to 23 Feb 2027, found 2 days ago.
How long is the flight from Chicago to London?
The cheapest one-way found recently, with Frontier Airlines on 12 Dec, takes 40 h 22 min with 3 stops.
Which airlines have the cheapest flights from Chicago to London?
Between 14 Nov and 29 Apr 2027, SAS Scandinavian has the cheapest return on 2 of the 8 departure dates we hold, Icelandair on 2 and Frontier Airlines on 2.
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