iDiscover the best prices by selecting your travel dates.
British Airways
BA 5957
→ Outbound · 27 Sep
LHR
London Heathrow
ORD
Chicago
10:00 PM
27 Sep
22h 00m
2:00 PM
28 Sep
← Return · 7 Oct
ORD
Chicago O'Hare
LHR
London Heathrow
7:05 PM
7 Oct
8h 00m
Direct
9:05 AM
8 Oct
from
£583
Return · per adult
SAS Scandinavian Airlines
SK 1508
→ Outbound · 8 Nov
LHR
London Heathrow
ORD
Chicago
7:30 PM
8 Nov
27h 15m
4:45 PM
9 Nov
← Return · 18 Nov
ORD
Chicago O'Hare
LHR
London Heathrow
7:15 PM
18 Nov
16h 25m
5:40 PM
19 Nov
from
£550
Return · per adult
TAP Air Portugal
TP 1363
→ Outbound · 20 Dec
LHR
London Heathrow
ORD
Chicago
6:00 AM
20 Dec
15h 30m
3:30 PM
20 Dec
← Return · 30 Dec
ORD
Chicago O'Hare
LHR
London Heathrow
7:00 PM
30 Dec
17h 55m
6:55 PM
31 Dec
from
£873
Return · per adult
United Airlines
UA 9924
→ Outbound · 31 Jan
LHR
London Heathrow
ORD
Chicago
6:50 AM
31 Jan
11h 20m
12:10 PM
31 Jan
← Return · 10 Feb
ORD
Chicago O'Hare
LHR
London Heathrow
9:50 PM
10 Feb
8h 10m
Direct
12:00 PM
11 Feb
from
£577
Return · per adult
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Popular airlines to Chicago
Top 9 airlines flying from London to Chicago
Cheapest and average return economy fares by carrier, from our sampled live searches. Fares change constantly — tap Search to see live prices for your dates.
| Airline | Cheapest | Average | Flights | Search |
|---|---|---|---|---|
| British Airways | £538 | £925 | Direct available | |
| SAS Scandinavian Airlines | £550 | £868 | With stops | |
 Lufthansa | £569 | £581 | With stops | |
 American Airlines | £571 | £725 | Direct available | |
 Virgin Atlantic | £579 | £638 | With stops | |
| TAP Air Portugal | £674 | £676 | With stops | |
 Turkish Airlines | £718 | £1192 | With stops | |
| United Airlines | £729 | £732 | With stops | |
 Delta | £734 | £736 | With stops |
Everything you should know
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Insights & trends for London to Chicago flights
Data-powered insights to help you find the cheapest flights, the best time to fly and much more.
How much is a return flight from London to Chicago?
Return flights from London to Chicago typically cost between £540 and £597 in August, though fares move with demand, season and how early you book. The lowest fare our search found recently was £538 — a great price and well below the usual range, so a price near this is worth grabbing. Keeping your dates flexible and comparing nearby days is the easiest way to land at the cheaper end.
What is the cheapest day to fly to Chicago?
The cheapest day to depart to Chicago is usually Monday, when fares start from around £540 — midweek departures tend to be quieter and cheaper. Tuesday is typically the most expensive day to fly out (around £569), as weekend travel is popular with leisure and business travellers alike. Where your plans allow, moving your outbound to a cheaper weekday can noticeably lower the total fare.
What is the cheapest time of day to fly to Chicago?
Flights to Chicago are generally cheapest departing in midday, with fares from around £538. Departures in the afternoon tend to cost more (about £565), as those slots are more convenient and in higher demand. Picking an off-peak departure time is a simple way to trim the price without changing your dates.
What is the cheapest London airport to fly to Chicago from?
The cheapest return flights to Chicago depart from London Heathrow (LHR), from around £565. London has several airports serving this route and fares can vary between them — Stansted (STN) is often the priciest at around £718. It's worth checking which London airport is both cheapest and most convenient for you before booking.
Can I save money by flying with a stopover to Chicago?
Yes — for Chicago you can often save by taking a stopover: 1-stop fares start from around £538, compared with about £571 to fly direct. The trade-off is a longer total journey with a connection, so weigh the saving against the extra travel time. If budget matters more to you than speed, a 1-stop option is worth considering.
Average return fare to Chicago by month
The cheapest month to fly from London to Chicago is typically January, with return economy fares from £538. Fares are usually highest in July (around £675). Figures are indicative, from sampled live fares, and change with demand.
Cheapest sampled return economy fare, London to Chicago, per month (gaps estimated). Search live for exact prices.
When to book flights from London to Chicago
Are your dates flexible? These are the ideal times to fly to Chicago based on our flight data — find the cheapest days for a 7-day trip.
Cheap flights to Chicago from across the UK
You don't have to fly from London. The cheapest UK departure for Chicago is currently London from £565. Compare return economy fares and typical flight times below — figures are indicative from sampled fares.
Indicative cheapest return economy fares by UK origin. Pick your dates in the search form above.
Weather in Chicago
Monday
Overcast
33°C
31/08/2026
Tuesday
Overcast
31°C
01/09/2026
Wednesday
Overcast
36°C
02/09/2026
Thursday
Drizzle
34°C
03/09/2026
Friday
Drizzle
32°C
04/09/2026
Saturday
Light rain
26°C
05/09/2026
Sunday
Overcast
25°C
06/09/2026
Powered by Open-Meteo.com
Reviews of airlines servicing Chicago
See what customers who have flown with American Airlines, Delta, Lufthansa and more to Chicago have to say. Each airline is scored on boarding, crew, food, comfort and entertainment.
American Airlines
1,124 reviews
Delta
1,130 reviews
Lufthansa
1,100 reviews
Turkish Airlines
2,140 reviews
United
900 reviews
American Airlines
8.8Very goodMy trip with American Airlines was smooth from start to finish. The staff were courteous, the boarding process was organized, and the flight itself was comfortable. Overall, a very positive experience.
Our travel experts
James Wilson
Expert on Turkish Airlines
James Wilson is a Turkish Airlines specialist with extensive knowledge of international routes, flight options, and travel planning. He helps customers find convenient and reliable Turkish Airlines flights to destinations worldwide.
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Expert on British Airways
Sarah Thompson specialises in British Airways travel, helping customers choose the right routes, schedules, and flight options. With a focus on smooth and stress-free journeys, she makes planning international travel simple and convenient.
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Isabella
Expert on Lufthansa
Isabella is a Lufthansa travel specialist with a keen eye for European and international flight options. She helps travellers plan smooth journeys by finding practical routes and connections tailored to their travel needs.
Read moreGood to know — flights from London to Chicago
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Popular flights to Chicago
About flights to Chicago
Overview
Chicago, the great city of the American Midwest, rises along the shores of Lake Michigan with dazzling architecture, deep-dish pizza, blues music and world-famous museums. It is a favourite for UK travellers exploring the US heartland or connecting onwards across North America. The main long-haul gateway is O'Hare International Airport (ORD), with Midway International (MDW) handling domestic routes. Comparing every fare in one place makes finding the right flight from the UK to Chicago quick and simple.
Best time to fly to Chicago
Chicago has four distinct seasons. Late spring (May to June) and early autumn (September to October) bring warm, comfortable days and are ideal for exploring, while summer is lively but busy and winters are famously cold and snowy. Fares typically ease outside the summer and Christmas peaks, so travelling in the shoulder months stretches your budget — check the price charts on this page for your dates.
Airlines and routes
British Airways, American Airlines and United Airlines fly direct from London Heathrow to Chicago O'Hare in around 8 to 9 hours. Virgin Atlantic also serves the route, and connecting options via other US or European hubs can be better value. Manchester offers seasonal direct or one-stop links. Comparing carriers for your exact dates is the surest way to secure the lowest fare.
Things to do in Chicago
Chicago rewards visitors with landmark sights, culture and lakefront charm:
- Millennium Park & Cloud Gate: the mirror-finished 'Bean' sculpture and open-air concerts in the city's heart.
- The Art Institute of Chicago: one of America's finest museums, home to Impressionist masterpieces.
- Willis Tower Skydeck: glass-floored ledges with heart-stopping views from the 103rd floor.
- Navy Pier: a lakefront hub of rides, boat tours, dining and its landmark Ferris wheel.
- Chicago Riverwalk & architecture cruise: the best way to admire the city's iconic skyline from the water.
At O'Hare International Airport (ORD)
O'Hare sits about 27 km northwest of downtown Chicago, with extensive duty-free shopping, currency exchange, ATMs and dining. The CTA Blue Line train runs directly from the airport into the city centre, alongside taxis, ride-hailing and shuttles. Midway, closer to the south side, is served by the Orange Line.
Top tips for finding cheap flights to Chicago
- Book roughly 2–4 months ahead for the best value — transatlantic fares climb close to departure.
- Avoid the summer and Christmas peaks; spring and autumn bring noticeably lower prices.
- Be flexible with your dates — midweek departures are often cheaper than weekends.
- Compare direct and one-stop options; a short connection can sometimes save a good deal.
Travel essentials
- UK travellers need an approved ESTA before flying — apply online in advance.
- A valid e-passport is required; no vaccinations are needed for entry.
- The local currency is the US dollar (USD).
Baggage & hand-luggage allowance for flights to Chicago
Your allowance to Chicago depends on the airline and the fare you book. The table below shows typical long-haul allowances so you know roughly what to expect — always confirm the exact limits with your airline before you fly.
| Fare type | Hand baggage | Checked baggage |
|---|---|---|
| Basic / Light economy | 1 small under-seat bag | Usually none — add for a fee |
| Standard economy | 1 cabin bag + 1 personal item | Typically 1 × 23 kg |
| Premium economy | 1–2 cabin bags + personal item | Typically 2 × 23 kg |
| Business / First | 2 cabin bags + personal item | Typically 2 × 32 kg |
Indicative only. Allowances vary by airline, route and fare — always check your airline's baggage policy.
Packing & baggage tips
- Full-service carriers (e.g. British Airways, Turkish Airlines, KLM) usually include a checked bag on long-haul economy fares; basic/low-cost fares often don't.
- Cabin (hand) bag size is commonly around 56 × 45 × 25 cm — confirm your airline's limit before you pack.
- Liquids in hand luggage must be in containers of 100 ml or less, inside one clear resealable bag.
- Weigh your bags at home — airport excess-baggage fees are far higher than pre-booked allowances.
- Extra or heavier bags are almost always cheaper added online in advance than at the airport.
FAQs — booking Chicago flights
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