$191 Find Cheap Flights from Illinois to the United Kingdom

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Useful Info

Good to know

Low seasonJanuary
High seasonJuly
Cheapest flight$191
Best time to beat the crowds with an average 15% drop in price.
Most popular time to fly with an average 19% increase in price.
Flight from Chicago O'Hare Airport to London Gatwick Airport

Flights from Illinois to the United Kingdom: the best tips from KAYAK users

Insights shared by verified travelers who flew the route from Illinois to the United Kingdom 
Learn how KAYAK collects reviews and tips from users.
Verified travelerFlew with British AirwaysORD-LHRJun 2025
Get a wheel chair if you have difficulty walking
JoeFlew with IberiaORD-LHRApr 2025
Get there early. Nice airport options while you wait.
Verified travelerFlew with IberiaORD-LHRMay 2025
Get to the airport early so you’re relaxed. Con yourself into believing it’s bedtime and try to sleep so that you can keep going all day when you get there. If you can afford more comfy seats it might be worth it - though I always have the cheap ones so I can’t say for sure. Try very hard not to. sit in the middle. I’m small and the guy next to me played games all night and didn’t care that he continually ( with every move) jabbed me with his arm. This was my first flight with Cheap Flights and it was far less convenient than other times I’ve flown overseas.
DinaFlew with United AirlinesORD-LHRJan 2025
Anticipate delays, prepare for long walks through Heathrow to baggage claim or for connections.
KariFlew with British AirwaysORD-LHRMay 2024
Always check to confirm your assistance is in system. No wheelchair waiting for me in London. Had no clue about airport or how to get around. Got lost easy
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.

FAQs for booking flights from Illinois to the United Kingdom

  • How does KAYAK find such low prices on flights from Illinois to the United Kingdom?

    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 the United Kingdom.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Illinois to the United Kingdom 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 the United Kingdom?

    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 from Illinois to the United Kingdom with an airline and back with another airline.

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

    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 from Illinois to the United Kingdom up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • Which is the cheapest airport to fly into in the United Kingdom?

    Prices will differ depending on the departure airport, but generally, the cheapest airport to fly to in the United Kingdom is Edinburgh Turnhouse Airport (EDI), with an average flight price of $549.

  • What is the cheapest day to fly to the United Kingdom?

    Based on KAYAK data, the cheapest day to fly to the United Kingdom is Wednesday where round-trip tickets can be as cheap as $765. On the other hand, the most expensive day to fly is Saturday, where round-trip prices are $883 on average.

  • What is the cheapest time of day to fly to the United Kingdom?

    The cheapest time of day to fly to the United Kingdom is generally in the morning, when round-trip flights cost $701 on average. Morning departures are around 15% cheaper than evening flights, on average. The most expensive time of day to fly to the United Kingdom is generally in the evening, which is peak travel time and where the average cost of a ticket is $821.

  • What is the cheapest flight to the United Kingdom?

    The cheapest ticket to the United Kingdom from Illinois found in the last 72 hours was to London Heathrow Airport, at $582 round-trip. The most popular route is Chicago O'Hare Intl Airport (ORD) to London Heathrow Airport (LHR) and the cheapest round-trip airline ticket found on this route in the last 72 hours was $582.

  • What is the cheapest month to fly from Illinois to the United Kingdom?

    The cheapest month for flights from Illinois to the United Kingdom is January, when tickets cost $560 (return) on average. On the other hand, the most expensive months are May and June, when the average cost of round-trip tickets is $1,214 and $1,012 respectively.

  • How far in advance should I book a flight from Illinois to the United Kingdom?

    To get a below average price on the flight from Illinois to the United Kingdom, you should book around 1 week before departure. For the absolute cheapest price, our data suggests you should book 16 weeks before departure.

  • How long is the flight to the United Kingdom?

    An average nonstop flight from Illinois to the United Kingdom takes 12h 59m, covering a distance of 3886 miles. The shortest route is Chicago O'Hare Intl Airport (ORD) to London Heathrow Airport (LHR) with an average flight time of 7h 35m.

  • What are the most popular destinations in the United Kingdom?

    Based on KAYAK flight searches, the most popular destination is London (81% of total searches to the United Kingdom). The next most popular destinations are Edinburgh (8%) and Belfast (6%). Searches for flights to Manchester (2%), to Birmingham (1%) and to Southampton (1%) are also popular.

Book cheap flights from Illinois to the United Kingdom

Recent round-trip flight deals

11/17Mon
2 stopsScandinavian Airlines
31h 35mORD-LHR
11/20Thu
1 stopScandinavian Airlines
16h 05mLHR-ORD
$379
11/13Thu
1 stopScandinavian Airlines
32h 00mORD-LHR
11/16Sun
2 stopsScandinavian Airlines
40h 05mLHR-ORD
$419
7/15Tue
1 stop
16h 51mORD-LGW
9/9Tue
1 stop
18h 47mLGW-ORD
$465
9/23Tue
1 stop
34h 44mORD-LGW
9/28Sun
1 stop
18h 47mLGW-ORD
$476
9/11Thu
1 stopTAP AIR PORTUGAL
12h 45mORD-LHR
9/14Sun
1 stopTAP AIR PORTUGAL
14h 10mLHR-ORD
$505
9/11Thu
1 stopTAP AIR PORTUGAL
12h 45mORD-LHR
9/14Sun
1 stopTAP AIR PORTUGAL
14h 10mLHR-ORD
$534
9/30Tue
1 stopIcelandair
10h 30mORD-LHR
10/12Sun
1 stopIcelandair
11h 10mLHR-ORD
$575
8/15Fri
1 stopIcelandair
10h 30mORD-LHR
8/29Fri
1 stopIcelandair
14h 10mLHR-ORD
$588
8/10Sun
1 stopAer Lingus
10h 40mORD-LHR
8/19Tue
1 stopAer Lingus
11h 35mLHR-ORD
$598
8/11Mon
1 stopAer Lingus
10h 40mORD-LHR
8/19Tue
1 stopAer Lingus
11h 35mLHR-ORD
$607

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Recent one-way flight deals

8/6Wed
1 stop
18h 29mORD-LGW
$191
8/6Wed
1 stop
18h 29mORD-LGW
$193
7/31Thu
1 stopTAP AIR PORTUGAL
18h 50mORD-LHR
$218
10/15Wed
1 stopIcelandair
31h 40mORD-LHR
$220
7/31Thu
1 stopTAP AIR PORTUGAL
22h 05mORD-LHR
$221
9/4Thu
1 stopIcelandair
31h 40mORD-LHR
$233
11/8Sat
1 stopJetBlue
11h 25mORD-LHR
$331
11/28Fri
1 stopJetBlue
11h 25mORD-LHR
$344
8/7Thu
2 stopsWestJet
17h 00mORD-EDI
$357
8/7Thu
1 stopWestJet
34h 35mORD-EDI
$384

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Last minute flights from Illinois to the United Kingdom

Last minute flight, train and bus deals

6/23Mon
multi-stop
35h 17mORD-LGW
6/30Mon
multi-stop
17h 56mLGW-ORD
$879
6/23Mon
multi-stopJetBlue
15h 50mORD-LHR
6/29Sun
multi-stopJetBlue
17h 30mLHR-ORD
$883
6/23Mon
nonstopUnited Airlines
7h 45mORD-EDI
7/8Tue
multi-stopUnited Airlines
15h 01mEDI-ORD
$893
6/23Mon
multi-stopUnited Airlines
31h 04mORD-EDI
7/9Wed
multi-stopUnited Airlines
30h 09mEDI-ORD
$894
6/23Mon
multi-stopAir Canada
18h 01mORD-EDI
7/4Fri
multi-stopAir Canada
28h 37mEDI-ORD
$900
6/23Mon
multi-stopAir Canada
18h 01mORD-EDI
7/4Fri
multi-stopAir Canada
14h 14mEDI-ORD
$907
6/23Mon
multi-stopDelta
12h 55mORD-EDI
7/3Thu
multi-stopDelta
12h 49mEDI-ORD
$908
6/23Mon
multi-stopTurkish Airlines
22h 35mORD-LHR
6/29Sun
multi-stopTurkish Airlines
20h 35mLHR-ORD
$969
6/19Thu
multi-stopTurkish Airlines
22h 45mORD-LGW
7/1Tue
multi-stopTurkish Airlines
34h 20mLGW-ORD
$1,396
6/23Mon
multi-stopDelta
10h 25mORD-EDI
7/6Sun
multi-stopDelta
12h 44mEDI-ORD
$1,528

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Everything you need to know for your flight to the United Kingdom

Cabin class types available on flights to Illinois

Cabin classes available on flights to Illinois. Prices are the lowest found on KAYAK over the last 7 days. Price and availability is not guaranteed.
First Class flights to the United Kingdomfrom $2,282
Business Class flights to the United Kingdomfrom $3,043
Prem Econ Class flights to the United Kingdomfrom $1,555
Economy Class flights to the United Kingdomfrom $582

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