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

For one-way options, check prices for Icelandair. According to our data, you can fly for as low as $280. Users have also found prices from $291 and $369 on TAP AIR PORTUGAL and Scandinavian Airlines, respectively.

What are the most popular routes from Illinois to London Heathrow Airport?

The most popular flight routes from Illinois to London Heathrow Airport are Chicago O'Hare Intl - London Heathrow, Chicago Midway - London Heathrow and Lambert-St Louis - London Heathrow.

What are the cheapest flights from Illinois to London Heathrow Airport?

While on average a flight from Illinois to London Heathrow Airport is generally $2,639, our data shows the cheapest flight currently is $408. When looking at the most popular route, (Chicago O'Hare Intl - London Heathrow), you can expect to pay $423 for that flight.

What are the most reliable airlines from Illinois to London Heathrow Airport?

Consider Royal Jordanian (88%), Gulf Air (82%) or Malaysia Airlines (79%) when booking your flight. These represent the most reliable airlines when flying from Illinois to London Heathrow Airport.

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

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

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

Users have found that booking a flight from Illinois to London Heathrow Airport at least 60 days early can save you up to 7% on average compared to booking a flight this week. If booking 60 days before your flight isn’t an option for you, users have found flights from Illinois to London Heathrow Airport for as little as $717 when booking for a departure date within the next two weeks. You can also check prices now. Some users have found airline tickets as low as $720 for flights departing within the next 3 days.

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

Flights from Illinois to London Heathrow Airport lean towards being more expensive in June. Prices are generally better when you fly from Illinois to London Heathrow Airport in February, with the cheapest ticket starting at $473.

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

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

How can I find direct flights from Illinois to Heathrow?

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

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

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

$280+ Flights from Illinois to London Heathrow Airport

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Cheap flight deals from Illinois to Heathrow

Most accurate provider	AranGrant 3 stars
Most trusted provider	AranGrant 3 stars
Round-trip from	$623 (Netflights)
One-way from	$280 (Mytrip)
Popular in	June
Cheapest in	February
Average price	$671
Good round-trip deal	$679 or less
Good one-way deal	$495 or less

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

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

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From Illinois to London Heathrow

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One-way flight from Illinois to London Heathrow

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Highest demand for flights based on searches. 17% potential increase in price ($154 potential increase over avg. RT price).

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Cheapest flight prices on average. 3% potential price decrease ($22 potential savings vs. average RT price).

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Average for round-trip flights in April 2025

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Price to beat on a round-trip flight from Illinois to London Heathrow.

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Price to beat on a one-way flight from Illinois to London Heathrow.

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Find flight deals from Illinois to Heathrow

Cheapest flights from Illinois to Heathrow
Explore the most affordable flight options available from Illinois to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 25, 2025.

Sun 8/177:15 pmORD - LHR

2 stops15h 10mScandinavian Airlines

Sun 8/319:05 pmLHR - ORD

2 stops25h 05mScandinavian Airlines

Deal found 4/24

$608

Sat 9/277:25 pmORD - LHR

1 stop10h 30mIcelandair

Sat 10/189:25 pmLHR - ORD

1 stop26h 50mIcelandair

Deal found 4/24

$613

Tue 5/136:05 pmORD - LHR

Nonstop8h 15mMultiple Airlines

Wed 5/218:40 amLHR - ORD

1 stop13h 15mMultiple Airlines

Deal found 4/24

$627

Fri 4/252:05 pmORD - LHR

1 stop13h 30mAir Canada

Wed 4/302:05 pmLHR - ORD

1 stop11h 55mAir Canada

Deal found 4/24

$628

Sun 9/216:00 pmORD - LHR

1 stop22h 55mTAP AIR PORTUGAL

Fri 9/266:00 amLHR - ORD

1 stop16h 30mTAP AIR PORTUGAL

Deal found 4/24

$642

Tue 5/134:05 pmORD - LHR

Nonstop8h 15mLufthansa

Wed 5/2111:05 amLHR - ORD

Nonstop9h 05mLufthansa

Deal found 4/24

$645

Mon 8/189:15 pmORD - LHR

Nonstop7h 40mFinnair

Thu 8/287:30 amLHR - ORD

1 stop16h 20mFinnair

Deal found 4/24

$646

Wed 9/248:40 amORD - LHR

1 stop15h 50mJetBlue

Tue 10/78:15 amLHR - ORD

1 stop18h 39mJetBlue

Deal found 4/25

$648

Mon 9/110:35 pmORD - LHR

Nonstop7h 40mAmerican Airlines

Fri 9/127:40 amLHR - ORD

1 stop14h 05mAmerican Airlines

Deal found 4/25

$650

Tue 8/199:15 pmORD - LHR

Nonstop7h 40mBritish Airways

Wed 8/271:10 pmLHR - ORD

Nonstop8h 45mBritish Airways

Deal found 4/25

$653

Tue 8/199:15 pmORD - LHR

Nonstop7h 40mIberia

Thu 9/412:15 pmLHR - ORD

Nonstop8h 35mIberia

Deal found 4/24

$654

Tue 5/69:15 pmORD - LHR

1 stop10h 10mAer Lingus

Tue 5/131:25 pmLHR - ORD

1 stop11h 35mAer Lingus

Deal found 4/24

$655

Best flights from Illinois to Heathrow
Discover carefully curated flight deals from Illinois to Heathrow that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 25, 2025.

Tue 5/132:00 pmORD - LHR

1 stop10h 35mMultiple Airlines

Wed 5/211:30 pmLHR - ORD

1 stop12h 25mMultiple Airlines

Deal found 4/24

$623

Sun 5/119:15 pmORD - LHR

1 stop10h 10mAer Lingus

Tue 5/208:50 amLHR - ORD

1 stop11h 10mAer Lingus

Deal found 4/24

$631

Mon 5/58:15 pmORD - LHR

2 stops14h 10mScandinavian Airlines

Mon 5/1210:20 amLHR - ORD

1 stop14h 05mScandinavian Airlines

Deal found 4/25

$634

Fri 5/210:15 pmORD - LHR

1 stop16h 05mIcelandair

Tue 5/69:25 pmLHR - ORD

1 stop29h 50mIcelandair

Deal found 4/25

$643

Tue 5/134:05 pmORD - LHR

Nonstop8h 15mLufthansa

Wed 5/2111:05 amLHR - ORD

Nonstop9h 05mLufthansa

Deal found 4/24

$645

Sun 5/118:40 amORD - LHR

1 stop15h 50mAir Canada

Tue 5/209:30 amLHR - ORD

2 stops15h 24mAir Canada

Deal found 4/24

$653

Sun 5/1110:05 amORD - LHR

1 stop14h 40mDelta

Tue 5/206:30 amLHR - ORD

1 stop13h 40mDelta

Deal found 4/24

$662

Mon 4/289:20 pmORD - LHR

Nonstop8h 25mUnited Airlines

Wed 5/2112:10 pmLHR - ORD

1 stop33h 45mUnited Airlines

Deal found 4/25

$664

Sun 5/1110:25 pmORD - LHR

Nonstop7h 50mBritish Airways

Wed 5/211:10 pmLHR - ORD

Nonstop8h 45mBritish Airways

Deal found 4/24

$668

Wed 4/301:50 pmORD - LHR

1 stop13h 00mKLM

Wed 5/79:55 amLHR - ORD

1 stop10h 45mKLM

Deal found 4/23

$669

Sun 5/1110:25 pmORD - LHR

Nonstop7h 50mFinnair

Tue 5/207:30 amLHR - ORD

1 stop16h 20mFinnair

Deal found 4/24

$674

Sun 5/48:50 amORD - LHR

1 stop15h 40mJetBlue

Wed 5/711:55 amLHR - ORD

1 stop15h 59mJetBlue

Deal found 4/25

$678

Last-minute flights from Illinois to Heathrow
Discover last-minute flight deals from Illinois to Heathrow. Data last updated April 25, 2025 and is based on user searches.

Fri 4/252:05 pmORD - LHR

1 stop13h 30mAir Canada

Wed 4/302:05 pmLHR - ORD

1 stop11h 55mAir Canada

Deal found 4/24

$628

Sun 4/2710:15 pmORD - LHR

1 stop16h 05mIcelandair

Thu 5/19:25 pmLHR - ORD

1 stop29h 50mIcelandair

Deal found 4/25

$636

Mon 4/289:20 pmORD - LHR

Nonstop8h 25mUnited Airlines

Wed 5/2112:10 pmLHR - ORD

1 stop33h 45mUnited Airlines

Deal found 4/25

$664

Wed 4/3011:30 amORD - LHR

1 stop13h 00mMultiple Airlines

Wed 5/78:40 amLHR - ORD

1 stop13h 15mMultiple Airlines

Deal found 4/25

$640

Wed 4/3011:30 amORD - LHR

1 stop16h 30mUnited Airlines

Mon 5/58:40 amLHR - ORD

1 stop33h 30mUnited Airlines

Deal found 4/25

$664

Wed 4/301:50 pmORD - LHR

1 stop13h 00mKLM

Wed 5/79:55 amLHR - ORD

1 stop10h 45mKLM

Deal found 4/23

$669

Wed 4/3010:20 pmORD - LHR

Nonstop7h 55mFinnair

Fri 5/99:15 amLHR - ORD

Nonstop8h 30mFinnair

Deal found 4/24

$680

Fri 5/210:15 pmORD - LHR

1 stop16h 05mIcelandair

Tue 5/69:25 pmLHR - ORD

1 stop29h 50mIcelandair

Deal found 4/25

$643

Sun 5/48:50 amORD - LHR

1 stop15h 40mJetBlue

Wed 5/711:55 amLHR - ORD

1 stop15h 59mJetBlue

Deal found 4/25

$678

Sun 5/48:00 pmORD - LHR

1 stop11h 10mDelta

Fri 5/1611:45 amLHR - ORD

2 stops16h 29mDelta

Deal found 4/25

$685

Sun 5/47:00 pmMDW - LHR

1 stop12h 10mDelta

Wed 5/218:40 amLHR - MDW

2 stops15h 05mDelta

Deal found 4/24

$685

Mon 5/58:15 pmORD - LHR

1 stop13h 45mScandinavian Airlines

Mon 5/1210:20 amLHR - ORD

1 stop14h 05mScandinavian Airlines

Deal found 4/25

$627

One-way flights from Illinois to Heathrow
Search for one-way flight options from Illinois to Heathrow. Find affordable one-way fares based on user searches. Data last updated April 25, 2025.

Wed 4/3010:15 pmORD - LHR

1 stop16h 05mIcelandair

Deal found 4/25

$280

Fri 7/186:00 pmORD - LHR

1 stop22h 55mTAP AIR PORTUGAL

Deal found 4/24

$291

Wed 7/237:00 amORD - LHR

2 stops33h 00mMultiple Airlines

Deal found 4/24

$294

Sun 6/19:40 amMDW - LHR

2 stops30h 10mMultiple Airlines

Deal found 4/23

$318

Sun 5/118:15 pmORD - LHR

1 stop15h 25mScandinavian Airlines

Deal found 4/24

$369

Mon 4/281:25 pmORD - LHR

1 stop13h 30mVirgin Atlantic

Deal found 4/23

$374

Tue 4/299:52 amMDW - LHR

1 stop14h 53mVirgin Atlantic

Deal found 4/24

$374

Sat 5/105:45 pmSTL - LHR

2 stops44h 35mMultiple Airlines

Deal found 4/23

$376

Tue 4/293:45 pmORD - LHR

1 stop10h 15mAer Lingus

Deal found 4/25

$385

Thu 5/88:45 amORD - LHR

1 stop15h 45mJetBlue

Deal found 4/24

$393

Mon 5/59:20 pmORD - LHR

Nonstop8h 25mLufthansa

Deal found 4/25

$396

Sun 7/207:15 pmORD - LHR

Nonstop7h 55mBritish Airways

Deal found 4/24

$406

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Tue 5/13

2:00 pm-6:35 am

1 stop10h 35m

London Heathrow

Wed 5/21

1:30 pm-7:55 pm

1 stop12h 25m

$623

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sun 5/11

9:15 pm-1:25 pm

1 stop10h 10m

London Heathrow

Tue 5/20

8:50 am-2:00 pm

1 stop11h 10m

$631

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Mon 5/5

8:15 pm-4:25 pm

2 stops14h 10m

London Heathrow

Mon 5/12

10:20 am-6:25 pm

1 stop14h 05m

$634

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Fri 5/2

10:15 pm-8:20 pm

1 stop16h 05m

London Heathrow

Tue 5/6

9:25 pm-9:15 pm

1 stop29h 50m

$643

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Tue 5/13

6:05 pm-8:20 am

Nonstop8h 15m

London Heathrow

Wed 5/21

11:05 am-2:10 pm

Nonstop9h 05m

$645

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sun 5/11

8:40 am-6:30 am

1 stop15h 50m

London Heathrow

Tue 5/20

9:30 am-6:54 pm

2 stops15h 24m

$653

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sun 5/11

10:05 am-6:45 am

1 stop14h 40m

London Heathrow

Tue 5/20

6:30 am-2:10 pm

1 stop13h 40m

$662

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Mon 4/28

9:20 pm-11:45 am

Nonstop8h 25m

London Heathrow

Wed 5/21

12:10 pm-3:55 pm

1 stop33h 45m

$664

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Wed 4/30

1:50 pm-8:50 am

1 stop13h 00m

London Heathrow

Wed 5/7

9:55 am-2:40 pm

1 stop10h 45m

$669

ChicagoLondon

ORD - LHR

ORDLHR

Chicago O'Hare Intl

Sun 5/11

10:25 pm-12:15 pm

Nonstop7h 50m

London Heathrow

Wed 5/21

9:30 am-5:50 pm

1 stop14h 20m

$673

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/25

Showing 1-10 of 60 results

...

Best time to book a flight from Illinois to Heathrow

Have a flexible travel schedule? Discover the best time to fly to Heathrow 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 Heathrow Airport

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

Currently, November is the cheapest month in which you can book a flight from Illinois to London Heathrow Airport (average of $661). Flying from Illinois to London Heathrow Airport 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 LHR?

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

Weekly flight availability from Illinois to London Heathrow Airport

The most flights from USIL to LHR are scheduled on a Wednesday (61 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (52 on average).

Rainfall in Heathrow by month

In terms of precipitation, rainfall in London Heathrow Airport 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 Heathrow Airport when rainfall is around 1.6 in.

Temperature in Heathrow by month

If weather is an important factor for your trip to London Heathrow Airport, 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 Heathrow

To help decide which airline to fly from Illinois to London, see what other customers have to say about Delta, KLM and Finnair. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.

Delta

8.0

Very good

7,920 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

7,920 reviews

Delta

8.0

Very good

7,920 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

1,333 reviews

Delta

8.0

Very good

7,920 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

1,272 reviews

Delta

8.0

Very good

7,920 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.

SWISS

7.5

Good

1,582 reviews

Delta

8.0

Very good

7,920 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 France

7.4

Good

1,444 reviews

Delta

8.0

Very good

7,920 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 Heathrow Airport one-way?
For one-way options, check prices for Icelandair. According to our data, you can fly for as low as $280. Users have also found prices from $291 and $369 on TAP AIR PORTUGAL and Scandinavian Airlines, respectively.
What are the most popular routes from Illinois to London Heathrow Airport?
The most popular flight routes from Illinois to London Heathrow Airport are Chicago O'Hare Intl - London Heathrow, Chicago Midway - London Heathrow and Lambert-St Louis - London Heathrow.
What are the most reliable airlines from Illinois to London Heathrow Airport?
Consider Royal Jordanian (88%), Gulf Air (82%) or Malaysia Airlines (79%) when booking your flight. These represent the most reliable airlines when flying from Illinois to London Heathrow Airport.
What are the cheapest flights from Illinois to London Heathrow Airport?
While on average a flight from Illinois to London Heathrow Airport is generally $2,639, our data shows the cheapest flight currently is $408. When looking at the most popular route, (Chicago O'Hare Intl - London Heathrow), you can expect to pay $423 for that flight.
Can I find deals for flights from Illinois to Heathrow that include hotel bookings?
Yes. In addition to deals on Illinois to Heathrow flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Illinois to Heathrow?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Illinois to Heathrow.
Can I find deals for business class flights from Illinois to Heathrow?
Yes. Cheapflights offers flight deals from Illinois to Heathrow 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 Heathrow Airport?
Currently, November is the cheapest month in which you can book a flight from Illinois to London Heathrow Airport (average of $661). Flying from Illinois to London Heathrow Airport 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

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Alternative routes for Illinois to Heathrow

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Top 10 airlines flying from Illinois to Heathrow

Airline	Cheapest	Average	Flexibility	On-time
SWISS	Cheapest$257	Average$695	FlexibilityNo cancel fee	On-time79%
Scandinavian Airlines	Cheapest$381	Average$594	FlexibilityNo cancel fee	On-time77%
Icelandair	Cheapest$468	Average$590	FlexibilityNo cancel fee	On-time76%
TAP AIR PORTUGAL	Cheapest$506	Average$770	FlexibilityNo cancel fee	On-timeN/A
JetBlue	Cheapest$516	Average$679	FlexibilityNo cancel fee	On-time62%
Lufthansa	Cheapest$547	Average$918	FlexibilityNo cancel fee	On-time76%
Air Canada	Cheapest$554	Average$739	FlexibilityNo cancel fee	On-time67%
Finnair	Cheapest$558	Average$710	FlexibilityNo cancel fee	On-time76%
Iberia	Cheapest$578	Average$711	FlexibilityNo cancel fee	On-time77%
Aer Lingus	Cheapest$585	Average$740	FlexibilityNo cancel fee	On-timeN/A

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$280+ Cheap flights from Illinois to Heathrow (LHR)

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 4/30. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Illinois to Heathrow with Cheapflights

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Cheap flight deals from Illinois to Heathrow

Keep the following information in mind while searching for Illinois to Heathrow flight deals. Data was last updated April 25, 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 Heathrow

Cheapest flights from Illinois to HeathrowExplore the most affordable flight options available from Illinois to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 25, 2025.

Explore the most affordable flight options available from Illinois to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 25, 2025.

Cheapflights Fare Finder

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

Best time to book a flight from Illinois to Heathrow

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

Cheapflights Insights

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

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

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

Find hourly flight availability from Illinois to Heathrow. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 25, 2025.

Weekly flight availability from Illinois to London Heathrow Airport

Explore weekly flight availability from Illinois to Heathrow. 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 April 25, 2025.

Rainfall in Heathrow by month

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

Temperature in Heathrow by month

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

Reviews of airlines servicing Heathrow

To help decide which airline to fly from Illinois to London, see what other customers have to say about Delta, KLM and Finnair. Users can see the overall rating for each airline as well as how each is rated 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 Heathrow. 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 Heathrow Airport one-way?

What are the most popular routes from Illinois to London Heathrow Airport?

What are the most reliable airlines from Illinois to London Heathrow Airport?

What are the cheapest flights from Illinois to London Heathrow Airport?

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

How can I find direct flights from Illinois to Heathrow?

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

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

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Alternative routes for Illinois to Heathrow

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Top 10 airlines flying from Illinois to Heathrow

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Cheapest flights from Illinois to Heathrow
Explore the most affordable flight options available from Illinois to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 25, 2025.