Cheap Flights from Illinois (IL) to London, England from $261 - Find Tickets & Airfare Deals at Cheapflights.com

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How to find the cheapest flight from
Illinois to London (LON)

All the information you need to plan the best null to LON flight in 2021: compare Illinois to London flight prices with the expected peak season, weather and rainfall in London.

How far in advance should I book a flight from Illinois to London?

When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 61 days in advance, which can save you up to 44% on flights from Illinois to London compared to booking the week you need them. Waiting 61 days out may not be for everyone, so we have options available for flights within the next two weeks, with the lowest price starting at $910. For sooner than that we have options available in the next 3 days from $1,146.

What is the cheapest month to fly from Illinois to London?

Flights from Illinois to London lean towards being more expensive in July. Prices are generally better when you fly from Illinois to London in October, with the cheapest ticket starting at $445.

Cheap flights from Illinois to London in June, July 2021

The best prices found for Illinois to LON flights for June, July

26 Jun - 5 Jul

$463pp

ORD

Chicago O'Hare Intl

Multiple Airlines

2 STOPS

STN

London Stansted

STN

London Stansted

Multiple Airlines

2 STOPS

ORD

Chicago O'Hare Intl

27 Jun - 5 Jul

$474pp

ORD

Chicago O'Hare Intl

Multiple Airlines

2 STOPS

STN

London Stansted

STN

London Stansted

Multiple Airlines

2 STOPS

ORD

Chicago O'Hare Intl

26 Jun - 1 Jul

$481pp

ORD

Chicago O'Hare Intl

Multiple Airlines

2 STOPS

STN

London Stansted

STN

London Stansted

Multiple Airlines

2 STOPS

ORD

Chicago O'Hare Intl

Illinois to London 2021 flight deals

Cheap flights to London from Illinois found for this year

7 Oct - 10 Oct

$309pp

ORD

Chicago O'Hare Intl

SAS

1 STOP

LHR

London Heathrow

LHR

London Heathrow

SAS

1 STOP

ORD

Chicago O'Hare Intl

21 Oct - 24 Oct

$310pp

ORD

Chicago O'Hare Intl

SAS

1 STOP

LHR

London Heathrow

LHR

London Heathrow

SAS

1 STOP

ORD

Chicago O'Hare Intl

17 Sep - 19 Sep

$311pp

ORD

Chicago O'Hare Intl

SAS

1 STOP

LHR

London Heathrow

LHR

London Heathrow

SAS

1 STOP

ORD

Chicago O'Hare Intl

Non-stop flights to London from Illinois

Save time with Illinois to London direct flight deals

27 Oct - 3 Nov

$630pp

ORD

Chicago O'Hare Intl

Multiple Airlines

Non-Stop

LHR

London Heathrow

LHR

London Heathrow

Finnair

Non-Stop

ORD

Chicago O'Hare Intl

20 Oct - 27 Oct

$632pp

ORD

Chicago O'Hare Intl

Iberia

Non-Stop

LHR

London Heathrow

LHR

London Heathrow

Iberia

Non-Stop

ORD

Chicago O'Hare Intl

20 Oct - 27 Oct

$633pp

ORD

Chicago O'Hare Intl

British Airways

Non-Stop

LHR

London Heathrow

LHR

London Heathrow

British Airways

Non-Stop

ORD

Chicago O'Hare Intl

Last minute flights from Illinois to London

Late deals on round-trip flights to London from Illinois, departing today and this week

26 Jun - 5 Jul

$463pp

ORD

Chicago O'Hare Intl

Multiple Airlines

2 STOPS

STN

London Stansted

STN

London Stansted

Multiple Airlines

2 STOPS

ORD

Chicago O'Hare Intl

27 Jun - 5 Jul

$474pp

ORD

Chicago O'Hare Intl

Multiple Airlines

2 STOPS

STN

London Stansted

STN

London Stansted

Multiple Airlines

2 STOPS

ORD

Chicago O'Hare Intl

26 Jun - 1 Jul

$481pp

ORD

Chicago O'Hare Intl

Multiple Airlines

2 STOPS

STN

London Stansted

STN

London Stansted

Multiple Airlines

2 STOPS

ORD

Chicago O'Hare Intl

One-way flights to London from Illinois

The cheapest one-way flights from Illinois to London

4:00 pm - 5:40 am

Iberia

Nonstop

7h 40m

ORD - LHR

$261

SnapTravelAir

12:35 pm - 6:35 am

Iberia

1 Stop

12h 00m

ORD - LHR

$278

SnapTravelAir

1:49 am - 7:50 pm

Multiple Airlines

2 Stops

36h 01m

ORD - STN

$295

Kiwi.com

Related info for your journey

Useful info, stats and facts about <span class="emphasized">Illinois</span> to <span class="emphasized">London</span> flights.

Flight FAQs

From Illinois to London

Are flight prices decreasing from Illinois to London due to COVID-19 (coronavirus)?

At this time, Cheapflights has noticed price decreases for many domestic flights due to COVID-19. Travel is not necessarily recommended at this time, and flights may be prone to cancellation: please check with local authorities in both Illinois and London for travel alerts, and be sure to review the airline's cancellation policy and travel advisories before booking. For more information, please view our post on what to know about COVID-19 (coronavirus) and travel.

Which airlines flying from Illinois to London have flexible cancellations due to COVID-19?

Some of the carriers operating flights from Illinois to London that may be offering flexible cancellation policies are British Airways, United Airlines, and American Airlines. Our site will let you filter for all airlines offering greater flexibility due to COVID-19.

Can I find flights from Illinois to London for under $400 on Cheapflights?

Yes, there are multiple flights from Illinois to London for under $400. The cheapest flight booked recently is on SAS for just $310, but on average you can expect to pay $333.

Are there nonstop flights from Illinois to London for under $700 on Cheapflights?

Cheapflights has at least 20 direct flights from Illinois to London under $700. A good price for a nonstop flight from Illinois to London is less than $653.

Are there last-minute flights available from Illinois to London for under $500?

There are currently 20+ open flights from Illinois to London within the next 7 days for less than $500.

What are the most popular airlines that fly from Illinois to London?

The most popular airlines flying from Illinois to London are Major Airline, American Airlines and Air Canada. Something to consider prior to booking your flight.

What are the most popular routes from Illinois to London?

When deciding which route to take from Illinois to London consider Chicago O'Hare Intl - London Heathrow, Chicago O'Hare Intl - London Gatwick or Chicago O'Hare Intl - London City as they are the most popular.

What are the cheapest Flights from Illinois to London?

While on average a flight from Illinois to London is generally $1,628, our data shows the cheapest flight currently is $224. When looking at the most popular route, (Chicago O'Hare Intl - London Heathrow), you can expect to pay $310 for that flight.

What are the most reliable airlines from Illinois to London?

The top 3 most reliable airlines when flying from Illinois to London are United Airlines (90%), Qatar Airways (89%) and EL AL (89%).

How long is the flight from Illinois to London?

There are many flights that can get you from Illinois to London in 9h 54m. Fly via British Airways, Delta, or Air Canada to get the fastest option. Both multi-stop and nonstop flights can be found to your destination and back.

What is the cheapest airline to fly from Illinois to London round-trip?

According to our current data, SAS ($310), offers the cheapest pricing from Illinois to London.

What are the cheapest airlines to fly from Illinois to London one-way?

To fly one-way, consider booking your trip with Iberia, which is currently one of the cheapest options available, starting at $261.

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Departure points for flights from Illinois to London

Select to see more specific information for flights to London from all departure points in Illinois.

Flights from Bloomington to Gatwick from $34,588 pp

Flights from Bloomington to Heathrow from $1,221 pp

Flights from Champaign to Heathrow from $921 pp

Flights from Chicago Midway to City from $1,082 pp

Flights from Chicago Midway to Gatwick from $1,625 pp

Flights from Chicago Midway to Heathrow from $646 pp

Flights from Chicago Midway to Luton from $1,926 pp

Flights from Chicago Midway to Stansted from $965 pp

Flights from Chicago-O'Hare Intl to City from $571 pp

Flights from Chicago-O'Hare Intl to Gatwick from $358 pp

Flights from Chicago-O'Hare Intl to Heathrow from $310 pp

Flights from Chicago-O'Hare Intl to Luton from $351 pp

Flights from Chicago-O'Hare Intl to Southend from $366 pp

Flights from Chicago-O'Hare Intl to Stansted from $345 pp

Flights from Moline to Gatwick from $1,116 pp

Flights from Moline to Heathrow from $838 pp

Flights from Peoria to City from $894 pp

Flights from Peoria to Heathrow from $970 pp

Flights from St Louis to City from $794 pp

Flights from St Louis to Gatwick from $725 pp

Flights from St Louis to Heathrow from $671 pp

Flights from St Louis to Luton from $825 pp

Flights from St Louis to Stansted from $779 pp

Destination information for London

Things to know before you go - useful duration and weather info for your trip from Illinois to London.

$1 = £0.73

69.8 °F

1.7 ″

Airports servicing

Belleville (BLV)

Bloomington (BMI)

Champaign (CMI)

Decatur (DEC)

Moline (MLI)

Marion (MWA)

Airports servicing London

Heathrow (LHR)

Gatwick (LGW)

City (LCY)

Stansted (STN)

Luton (LTN)

Southend (SEN)

Airline	Cheapest	Average	Flexibility	On-time
Norwegian	$334	$477	No cancel fee	74%
Norwegian Air UK	$330	$566	No cancel fee	N/A
Air France	$409	$576	No cancel fee	77%
Delta	$395	$599	No cancel fee	N/A
Brussels Airlines	$371	$600	No cancel fee	N/A
SAS	$288	$632	No cancel fee	77%
KLM	$386	$632	No cancel fee	75%
TAP AIR PORTUGAL	$452	$641	No cancel fee	N/A
Austrian Airlines	$399	$699	No cancel fee	78%
Air Canada	$362	$730	No cancel fee	67%