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

For one-way options, check prices for Icelandair. According to our data, you can fly for as low as $266. Users have also found prices from $277 and $344 on TAP AIR PORTUGAL and JetBlue, respectively.

What are the most popular routes from Illinois to London?

While some choose either Chicago O'Hare Intl - London Gatwick or Chicago O'Hare Intl - London City, Chicago O'Hare Intl - London Heathrow is the most popular route from Illinois to London.

What are the cheapest flights from Illinois to London?

On average you can expect to pay $2,918 for a flight from Illinois to London. The cheapest flight overall is $402 while the most popular route, (Chicago O'Hare Intl - London Heathrow) is currently priced at $452.

What are the most reliable airlines from Illinois to London?

No one likes to see their flight delayed. When booking a flight from Illinois to London consider choosing Royal Jordanian (87%), Air Canada (80%) or Austrian Airlines (80%) as they are the most reliable in getting you off to your destination on time.

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

When booking a flight from Illinois to London, you may want to consider flying on American Airlines, Air Canada or Alaska Airlines as they are the most popular for this route.

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

Find a great deal and save up to 11% by booking at least 49 days prior to your desired departure date, rather than waiting until the week of travel. According to our data, there are a number of flights available from Illinois to London within the next two weeks, with the cheapest ticket starting at $714.

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

Our data shows that February tends to be the cheapest month to fly to London from Illinois. Users have commonly found prices around $755 for the month, but tickets can be as low as $473. Due to multiple factors, prepare for potentially higher prices in June.

Can I find deals for flights from Illinois to London that include hotel bookings?

Yes. In addition to deals on Illinois to London flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from Illinois to London?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Illinois to London.

Can I find deals for business class flights from Illinois to London?

Yes. Cheapflights offers flight deals from Illinois to London by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$256+ Flights from Illinois to London

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Cheap flight deals from Illinois to London

Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 3 stars
Round-trip from	$594 (oojo)
One-way from	$256 (Kiwi.com)
Popular in	June
Cheapest in	February
Average price	$711
Good round-trip deal	$668 or less
Good one-way deal	$488 or less

Provider with most accurate pricing for Chicago (CHI)-London (LON) flight deals.

Search Deals

Provider most trusted by Cheapflights users for Chicago (CHI)-London (LON) flights.

Search Deals

From Illinois to London (LON)

Search Deals

One-way flight from Illinois to London (LON)

Search Deals

Highest demand for flights based on searches. 18% potential increase in price ($172 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 3% potential price decrease ($26 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in March 2025

Search Deals

Price to beat on a round-trip flight from Illinois to London (LON).

Search Deals

Price to beat on a one-way flight from Illinois to London (LON).

Search Deals

Find flight deals from Illinois to London

Cheapest flights from Illinois to London
Explore the most affordable flight options available from Illinois to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 31, 2025.

Mon 5/127:15 pmORD - LHR

1 stop14h 45mScandinavian Airlines

Fri 5/236:40 amLHR - ORD

2 stops15h 30mScandinavian Airlines

Deal found 3/30

$594

Thu 4/175:55 amORD - LGW

1 stop18h 25mMultiple Airlines

Thu 4/242:00 pmLGW - ORD

1 stop24h 04mMultiple Airlines

Deal found 3/30

$594

Fri 5/27:25 pmORD - LGW

1 stop10h 20mIcelandair

Sat 5/103:40 pmLGW - ORD

1 stop32h 35mIcelandair

Deal found 3/29

$595

Sun 4/136:00 pmORD - LGW

2 stops20h 25mTAP AIR PORTUGAL

Tue 4/294:25 pmLGW - ORD

1 stop29h 45mTAP AIR PORTUGAL

Deal found 3/30

$596

Tue 4/299:15 pmORD - LHR

Nonstop7h 45mMultiple Airlines

Tue 5/68:45 amLHR - ORD

1 stop13h 15mMultiple Airlines

Deal found 3/30

$598

Tue 4/84:40 pmMDW - LGW

1 stop35h 20mMultiple Airlines

Tue 4/292:00 pmLGW - MDW

2 stops31h 13mMultiple Airlines

Deal found 3/31

$604

Tue 8/54:42 pmORD - LHR

1 stop11h 38mIberia

Wed 8/202:25 pmLHR - ORD

Nonstop8h 35mIberia

Deal found 3/30

$605

Sun 5/48:20 pmORD - LHR

Nonstop8h 10mBritish Airways

Thu 5/151:10 pmLHR - ORD

Nonstop8h 45mBritish Airways

Deal found 3/30

$606

Wed 10/86:00 pmORD - LHR

1 stop22h 55mTAP AIR PORTUGAL

Tue 10/147:50 pmLHR - ORD

1 stop26h 20mTAP AIR PORTUGAL

Deal found 3/31

$609

Mon 5/57:15 pmORD - STN

2 stops20h 25mMultiple Airlines

Sat 5/101:55 pmSTN - ORD

2 stops32h 15mMultiple Airlines

Deal found 3/30

$610

Tue 4/223:35 pmORD - LHR

1 stop12h 25mAir Canada

Sun 4/272:05 pmLHR - ORD

1 stop11h 55mAir Canada

Deal found 3/30

$616

Tue 5/64:55 pmORD - LHR

Nonstop7h 55mFinnair

Wed 5/1410:20 amLHR - ORD

1 stop13h 30mFinnair

Deal found 3/30

$621

Best flights from Illinois to London
Discover carefully curated flight deals from Illinois to London that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated March 31, 2025.

Mon 5/127:15 pmORD - LHR

2 stops15h 10mScandinavian Airlines

Sun 5/1810:20 amLHR - ORD

1 stop11h 50mScandinavian Airlines

Deal found 3/31

$594

Thu 4/175:55 amORD - LGW

1 stop18h 25mMultiple Airlines

Thu 4/242:00 pmLGW - ORD

1 stop24h 04mMultiple Airlines

Deal found 3/30

$594

Fri 5/27:25 pmORD - LGW

1 stop10h 20mIcelandair

Sat 5/103:40 pmLGW - ORD

1 stop32h 35mIcelandair

Deal found 3/29

$595

Sun 4/136:00 pmORD - LGW

2 stops20h 25mTAP AIR PORTUGAL

Tue 4/294:25 pmLGW - ORD

1 stop29h 45mTAP AIR PORTUGAL

Deal found 3/30

$596

Tue 8/54:42 pmORD - LHR

1 stop11h 38mIberia

Wed 8/202:25 pmLHR - ORD

Nonstop8h 35mIberia

Deal found 3/30

$605

Sun 5/48:20 pmORD - LHR

Nonstop8h 10mBritish Airways

Thu 5/151:10 pmLHR - ORD

Nonstop8h 45mBritish Airways

Deal found 3/30

$606

Thu 5/13:45 pmORD - LHR

1 stop10h 15mAer Lingus

Tue 5/61:25 pmLHR - ORD

1 stop11h 35mAer Lingus

Deal found 3/30

$615

Tue 4/223:35 pmORD - LHR

1 stop12h 25mAir Canada

Sun 4/272:05 pmLHR - ORD

1 stop11h 55mAir Canada

Deal found 3/30

$616

Tue 5/64:55 pmORD - LHR

Nonstop7h 55mFinnair

Wed 5/1410:20 amLHR - ORD

1 stop13h 30mFinnair

Deal found 3/30

$621

Fri 5/28:50 amORD - LHR

1 stop15h 40mJetBlue

Tue 5/68:15 amLHR - ORD

1 stop19h 39mJetBlue

Deal found 3/31

$643

Mon 8/44:55 pmORD - LHR

Nonstop7h 55mAmerican Airlines

Thu 9/257:40 amLHR - ORD

1 stop14h 05mAmerican Airlines

Deal found 3/30

$645

Sun 5/49:20 pmORD - LHR

Nonstop8h 25mUnited Airlines

Mon 5/191:45 pmLHR - ORD

1 stop32h 10mUnited Airlines

Deal found 3/30

$657

Last-minute flights from Illinois to London
Discover last-minute flight deals from Illinois to London. Data last updated March 31, 2025 and is based on user searches.

Sat 4/51:24 pmORD - LHR

1 stop14h 06mJetBlue

Sat 4/128:25 amLHR - ORD

1 stop17h 02mJetBlue

Deal found 3/31

$658

Mon 4/77:30 pmORD - LGW

1 stop10h 15mIcelandair

Tue 4/153:40 pmLGW - ORD

1 stop32h 35mIcelandair

Deal found 3/30

$622

Mon 4/73:45 pmORD - LHR

1 stop11h 20mAer Lingus

Tue 4/1512:00 pmLHR - ORD

1 stop13h 00mAer Lingus

Deal found 3/30

$640

Tue 4/85:10 amORD - LGW

3 stops46h 50mMultiple Airlines

Tue 4/2910:00 amLGW - ORD

1 stop34h 26mMultiple Airlines

Deal found 3/30

$601

Tue 4/84:40 pmMDW - LGW

1 stop35h 20mMultiple Airlines

Tue 4/292:00 pmLGW - MDW

2 stops31h 13mMultiple Airlines

Deal found 3/31

$604

Tue 4/87:30 pmORD - LHR

1 stop10h 25mIcelandair

Tue 4/299:25 pmLHR - ORD

1 stop26h 50mIcelandair

Deal found 3/30

$615

Tue 4/82:05 pmORD - LHR

2 stops13h 55mMultiple Airlines

Tue 4/296:00 amLHR - ORD

1 stop13h 20mMultiple Airlines

Deal found 3/30

$653

Tue 4/88:20 amORD - LGW

1 stop16h 15mAmerican Airlines

Tue 4/1512:20 pmLGW - ORD

2 stops17h 29mAmerican Airlines

Deal found 3/30

$657

Tue 4/86:05 pmORD - LHR

Nonstop8h 15mUnited Airlines

Tue 4/158:45 amLHR - ORD

1 stop13h 10mUnited Airlines

Deal found 3/31

$659

Tue 4/85:45 pmORD - LHR

Nonstop7h 35mFinnair

Tue 4/159:15 amLHR - ORD

Nonstop8h 30mFinnair

Deal found 3/31

$668

Tue 4/86:20 pmORD - LHR

1 stop11h 05mDelta

Tue 4/156:30 amLHR - ORD

2 stops15h 41mDelta

Deal found 3/31

$678

Tue 4/812:48 pmMDW - LHR

1 stop12h 27mDelta

Tue 4/156:30 amLHR - MDW

2 stops13h 52mDelta

Deal found 3/31

$678

One-way flights from Illinois to London
Search for one-way flight options from Illinois to London. Find affordable one-way fares based on user searches. Data last updated March 31, 2025.

Tue 7/155:45 pmSTL - LGW

1 stop34h 15mMultiple Airlines

Deal found 3/30

$256

Sat 7/57:56 amORD - LGW

1 stop20h 04mMultiple Airlines

Deal found 3/31

$265

Tue 4/297:25 pmORD - LHR

1 stop10h 30mIcelandair

Deal found 3/30

$266

Tue 4/295:55 amORD - LHR

2 stops24h 00mMultiple Airlines

Deal found 3/30

$268

Fri 4/111:05 pmMDW - LGW

1 stop14h 55mMultiple Airlines

Deal found 3/30

$274

Thu 8/76:00 pmORD - LHR

1 stop12h 45mTAP AIR PORTUGAL

Deal found 3/31

$277

Mon 7/146:10 pmORD - LGW

1 stop15h 25mTAP AIR PORTUGAL

Deal found 3/30

$277

Mon 7/216:10 pmORD - LTN

2 stops23h 10mMultiple Airlines

Deal found 3/30

$286

Tue 4/295:55 amORD - STN

3 stops35h 00mMultiple Airlines

Deal found 3/30

$294

Fri 4/2510:15 pmORD - LGW

1 stop10h 25mIcelandair

Deal found 3/31

$297

Tue 4/295:55 amORD - LCY

3 stops33h 45mMultiple Airlines

Deal found 3/30

$341

Thu 5/18:50 amORD - LHR

1 stop15h 40mJetBlue

Deal found 3/31

$344

Cheapflights Fare Finder

Use the filters below to find and compare flights from Illinois to London that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Mon 5/12

7:15 pm-4:25 pm

2 stops15h 10m

London Heathrow

Sun 5/18

10:20 am-4:10 pm

1 stop11h 50m

$594

ChicagoLondon

ORD - LGW

ORDLGW

Chicago O'Hare Intl

Thu 4/17

5:55 am-6:20 am

1 stop18h 25m

London Gatwick

Thu 4/24

2:00 pm-8:04 am

1 stop24h 04m

$594

ChicagoLondon

ORD - LGW

ORDLGW

Chicago O'Hare Intl

Fri 5/2

7:25 pm-11:45 am

1 stop10h 20m

London Gatwick

Sat 5/10

3:40 pm-6:15 pm

1 stop32h 35m

$595

ChicagoLondon

ORD - LGW

ORDLGW

Chicago O'Hare Intl

Sun 4/13

6:00 pm-8:25 pm

2 stops20h 25m

London Gatwick

Tue 4/29

4:25 pm-4:10 pm

1 stop29h 45m

$596

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Tue 4/29

9:15 pm-11:00 am

Nonstop7h 45m

London Heathrow

Tue 5/6

8:45 am-4:00 pm

1 stop13h 15m

$598

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Tue 8/5

5:45 pm-7:20 am

Nonstop7h 35m

London Heathrow

Wed 8/20

12:30 pm-3:05 pm

Nonstop8h 35m

$605

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sun 5/4

8:20 pm-10:30 am

Nonstop8h 10m

London Heathrow

Thu 5/15

1:10 pm-3:55 pm

Nonstop8h 45m

$606

ChicagoLondon

ORD - STN

ORDSTN

Chicago O'Hare Intl

Mon 5/5

7:15 pm-9:40 pm

2 stops20h 25m

London Stansted

Sat 5/10

1:55 pm-4:10 pm

2 stops32h 15m

$610

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Tue 4/22

3:35 pm-10:00 am

1 stop12h 25m

London Heathrow

Sun 4/27

2:05 pm-8:00 pm

1 stop11h 55m

$616

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Tue 5/6

4:55 pm-6:50 am

Nonstop7h 55m

London Heathrow

Wed 5/14

10:20 am-5:50 pm

1 stop13h 30m

$621

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/30

Showing 1-10 of 60 results

...

Best time to book a flight from Illinois to London

Have a flexible travel schedule? Discover the best time to fly to London from Illinois with our price prediction graph.

Estimated round-trip price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Illinois to London

What is the cheapest month to book a flight from Illinois to London?

Currently, November is the cheapest month in which you can book a flight from Illinois to London (average of $661). Flying from Illinois to London in June is currently the most expensive (average of $1,110). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from IL to LON?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Illinois to London as you normally would.

Weekly flight availability from Illinois to London

The most flights from USIL to LON are scheduled on a Monday (57 on average). You will have fewer flight options on Friday, which is when the least amount of flights are scheduled (33 on average).

Rainfall in London by month

In terms of precipitation, rainfall in London ranges from 1.6 - 2.8 inches per month. January is typically the wettest month, when rainfall can reach 2.8 in. July is typically the driest time to visit London when rainfall is around 1.6 in.

Temperature in London by month

If weather is an important factor for your trip to London, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 62.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 39.2 F).

Reviews of airlines servicing London

To help decide which airline to fly from Illinois to London, see what other customers have to say about Delta, Porter Airlines and KLM. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Delta

8.0

Very good

7,899 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Delta

8.0

Very good

7,899 reviews

Delta

8.0

Very good

7,899 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Porter Airlines

7.9

Good

277 reviews

Delta

8.0

Very good

7,899 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

KLM

7.8

Good

1,321 reviews

Delta

8.0

Very good

7,899 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Air Transat

7.8

Good

381 reviews

Delta

8.0

Very good

7,899 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Finnair

7.6

Good

1,267 reviews

Delta

8.0

Very good

7,899 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Related info for your journey

What are the cheapest airlines to fly from Illinois to London one-way?
For one-way options, check prices for Icelandair. According to our data, you can fly for as low as $266. Users have also found prices from $277 and $344 on TAP AIR PORTUGAL and JetBlue, respectively.
What are the most popular routes from Illinois to London?
While some choose either Chicago O'Hare Intl - London Gatwick or Chicago O'Hare Intl - London City, Chicago O'Hare Intl - London Heathrow is the most popular route from Illinois to London.
What are the most reliable airlines from Illinois to London?
No one likes to see their flight delayed. When booking a flight from Illinois to London consider choosing Royal Jordanian (87%), Air Canada (80%) or Austrian Airlines (80%) as they are the most reliable in getting you off to your destination on time.
What are the cheapest flights from Illinois to London?
On average you can expect to pay $2,918 for a flight from Illinois to London. The cheapest flight overall is $402 while the most popular route, (Chicago O'Hare Intl - London Heathrow) is currently priced at $452.
Can I find deals for flights from Illinois to London that include hotel bookings?
Yes. In addition to deals on Illinois to London flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Illinois to London?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Illinois to London.
Can I find deals for business class flights from Illinois to London?
Yes. Cheapflights offers flight deals from Illinois to London by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from Illinois to London?
Currently, November is the cheapest month in which you can book a flight from Illinois to London (average of $661). Flying from Illinois to London in June is currently the most expensive (average of $1,110). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Hounslow

Hayes

Thornton Heath

Luton

Wembley

Harrow

Horley

Canterbury

Dover

Gatwick

Orpington

Watford

Milton Keynes

Croydon

Borehamwood

Folkestone

Ilford

Aylesbury

Chelmsford

Sutton

Browse thousands of different options on Cheapflights for your next trip

Top 10 airlines flying from Illinois to London

Airline	Cheapest	Average	Flexibility	On-time
SWISS	Cheapest$257	Average$695	FlexibilityNo cancel fee	On-time79%
Scandinavian Airlines	Cheapest$381	Average$601	FlexibilityNo cancel fee	On-time77%
Delta	Cheapest$451	Average$837	FlexibilityNo cancel fee	On-timeN/A
Icelandair	Cheapest$466	Average$627	FlexibilityNo cancel fee	On-time76%
TAP AIR PORTUGAL	Cheapest$506	Average$765	FlexibilityNo cancel fee	On-timeN/A
JetBlue	Cheapest$516	Average$679	FlexibilityNo cancel fee	On-time62%
Lufthansa	Cheapest$547	Average$913	FlexibilityNo cancel fee	On-time76%
Air Canada	Cheapest$554	Average$731	FlexibilityNo cancel fee	On-time67%
Finnair	Cheapest$560	Average$727	FlexibilityNo cancel fee	On-time76%
Iberia	Cheapest$581	Average$858	FlexibilityNo cancel fee	On-time77%

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$256+ Cheap flights from Illinois to London (LON)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 7/15. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Illinois to London with Cheapflights

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Cheap flight deals from Illinois to London

Keep the following information in mind while searching for Illinois to London flight deals. Data was last updated March 31, 2025.

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Good round-trip deal

Good one-way deal

Find flight deals from Illinois to London

Cheapest flights from Illinois to LondonExplore the most affordable flight options available from Illinois to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 31, 2025.

Explore the most affordable flight options available from Illinois to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 31, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Illinois to London that are best for you.

Best time to book a flight from Illinois to London

Have a flexible travel schedule? Discover the best time to fly to London from Illinois with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from Illinois to London

What is the cheapest month to book a flight from Illinois to London?

What is the cheapest time of day to fly from IL to LON?

Find hourly flight availability from Illinois to London. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated March 31, 2025.

Weekly flight availability from Illinois to London

Explore weekly flight availability from Illinois to London. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated March 31, 2025.

Rainfall in London by month

Plan your trip to London by taking into account the average rainfall totals by month.

Temperature in London by month

Plan your trip to London by taking into account the average temperature totals by month.

Reviews of airlines servicing London

To help decide which airline to fly from Illinois to London, see what other customers have to say about Delta, Porter Airlines and KLM. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from Illinois to London. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

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

What are the most popular routes from Illinois to London?

What are the most reliable airlines from Illinois to London?

What are the cheapest flights from Illinois to London?

Can I find deals for flights from Illinois to London that include hotel bookings?

How can I find direct flights from Illinois to London?

Can I find deals for business class flights from Illinois to London?

What is the cheapest month to book a flight from Illinois to London?

Traveling to a place near Illinois?

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Alternative routes for Illinois to London

See prices for flight routes from nearby airports that may be better suited for you.

Top 10 airlines flying from Illinois to London

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Cheapest flights from Illinois to London
Explore the most affordable flight options available from Illinois to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 31, 2025.