How does KAYAK find such low prices on flights from Illinois to London?

KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Illinois to London. Visit our flight page for the latest deals!>/a>

How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Illinois to London?

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to London from Illinois is likely to change within 7 days, so travelers know whether to wait or book now. Visit our flight page for the latest deals!>/a>

What is the Hacker Fare option on flights from Illinois to London?

Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to London with an airline and back to Illinois with another airline. Visit our flight page for the latest deals!>/a>

What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Illinois to London?

Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to London from Illinois up to 3 days before/after your preferred dates. You can then pick the flights that suit you best. Visit our flight page for the latest deals!>/a>

$213 CHEAP FLIGHTS from Illinois to London

KAYAK searches hundreds of travel sites at once for deals on flights to London

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Cheap Flights from Illinois to London

Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Illinois to London that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.

Round-trip

One-way

Last minute

Direct

Recent round-trip flight deals from Illinois to London

KAYAK's recommended round-trip deals from the most popular airlines that fly from Illinois to London.

Discover the best prices for you by selecting your travel dates on KAYAK.

7:15 pm - 6:30 pmORD-LHR

17h 15m1 stop

6:40 am - 4:10 pmLHR-ORD

15h 30m1 stop

$423Scandinavian Airlines

Find Deal

Mon, Sep 22 - Thu, Oct 2

7:15 pm - 9:35 pmORD-LHR

20h 20m2 stops

10:20 am - 4:10 pmLHR-ORD

11h 50m1 stop

$430Scandinavian Airlines

Find Deal

Mon, Sep 22 - Thu, Oct 2

9:15 pm - 1:25 pmORD-LHR

10h 10m1 stop

1:25 pm - 7:00 pmLHR-ORD

11h 35m1 stop

$539Aer Lingus

Find Deal

Tue, Aug 5 - Wed, Aug 20

6:00 pm - 5:45 pmORD-LHR

17h 45m1 stop

8:00 am - 4:10 pmLHR-ORD

14h 10m1 stop

$551TAP AIR PORTUGAL

Find Deal

Fri, Oct 17 - Fri, Oct 24

6:10 pm - 3:35 pmORD-LGW

15h 25m1 stop

4:25 pm - 4:10 pmLGW-ORD

29h 45m1 stop

$569TAP AIR PORTUGAL

Find Deal

Mon, Sep 22 - Tue, Oct 21

9:15 pm - 10:55 amORD-LHR

7h 40mnonstop

9:50 am - 3:45 pmLHR-ORD

11h 55m1 stop

$570American Airlines

Find Deal

Tue, Aug 19 - Thu, Aug 28

4:42 pm - 10:20 amORD-LHR

11h 38m1 stop

3:30 pm - 6:15 pmLHR-ORD

8h 45mnonstop

$571Iberia

Find Deal

Tue, Aug 5 - Wed, Aug 20

1:27 pm - 7:50 amORD-LHR

12h 23m1 stop

9:50 am - 3:45 pmLHR-ORD

11h 55m1 stop

$575American Airlines

Find Deal

Wed, Aug 13 - Wed, Aug 20

9:15 pm - 10:55 amORD-LHR

7h 40mnonstop

12:30 pm - 3:05 pmLHR-ORD

8h 35mnonstop

$577Iberia

Find Deal

Tue, Aug 19 - Wed, Aug 27

9:15 pm - 1:25 pmORD-LHR

10h 10m1 stop

8:50 am - 2:00 pmLHR-ORD

11h 10m1 stop

$637Aer Lingus

Find Deal

Mon, May 12 - Fri, Jun 6

Useful Info

Low season	February
High season	March
Cheapest flight	$213

Best time to beat the crowds with an average 11% drop in price.

Most popular time to fly and prices are also 17% lower on average.

Flight from Chicago O'Hare Airport to London Gatwick Airport

JoeFlew with IberiaORD-LHRApr 2025

Get there early. Nice airport options while you wait.

DinaFlew with United AirlinesORD-LHRJan 2025

Anticipate delays, prepare for long walks through Heathrow to baggage claim or for connections.

Verified travelerFlew with United AirlinesORD-LHRJul 2024

Even though you may have a delay or two the important part is that you arrive safely from one point to the next. I wish I could get some credit back since I paid for a nonstop flight and ended up having a connecting flight.

Verified travelerFlew with British AirwaysORD-LHRMay 2024

Make sure you get a airline that allows one check-in luggage and respects its customers.

AaronFlew with American AirlinesORD-LHRDec 2023

Find a flight where you are allowed to choose your seats before the day of boarding for anything international.

How does KAYAK find such low prices on flights from Illinois to London?
KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Illinois to London.
How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Illinois to London?
KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to London from Illinois is likely to change within 7 days, so travelers know whether to wait or book now.
What is the Hacker Fare option on flights from Illinois to London?
Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to London with an airline and back to Illinois with another airline.
What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Illinois to London?
Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to London from Illinois up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Ilford

Deal

Southall

St. Albans

Folkestone

Bishop's Stortford

Barnet

Enfield

Ascot

Ely

Woodstock

Edgware

Rye

Weybridge

Alton

Surbiton

Dorking

Hatfield

Cobham

Burford

Everything you need to know for your flight to London

Cabin class

Complete your trip

Direct Flights

Flights to other cities

Origins

Other airports

Return flight deals

Cabin class types available on flights to Illinois

First Class flights to Londonfrom $4,475

Business Class flights to Londonfrom $775

Prem Econ Class flights to Londonfrom $1,569

Economy Class flights to Londonfrom $582

$213 Find Cheap Flights from Illinois to London

KAYAK searches hundreds of travel sites at once for deals on flights to London

Cheap Flights from Illinois to London

Recent round-trip flight deals from Illinois to London

Recent one-way flight deals from Illinois to London

Recent last minute flight deals from Illinois to London

Recent direct flight deals from Illinois to London

Good to know

Flights from Illinois to London: the best tips from KAYAK users

FAQs for booking flights from Illinois to London

How does KAYAK find such low prices on flights from Illinois to London?

KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Illinois to London.

How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Illinois to London?

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to London from Illinois is likely to change within 7 days, so travelers know whether to wait or book now.

What is the Hacker Fare option on flights from Illinois to London?

Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to London with an airline and back to Illinois with another airline.

What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Illinois to London?

Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to London from Illinois up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Traveling to a place near London?

Everything you need to know for your flight to London

Cabin class types available on flights to Illinois

Complete your trip to London with a hotel stay or car rental

Find direct flights for London

Flights to other popular destinations

Flights from domestic origins to London

Choose which airport to fly into in London

Find deals for your return flight