$205 Find Cheap Flights from Illinois to the United Kingdom

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Useful Info
Useful Info

Good to know

Low seasonFebruary
High seasonJuly
Cheapest flight$205
Best time to beat the crowds with an average 12% drop in price.
Most popular time to fly with an average 22% 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.
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.

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 London Heathrow Airport (LHR), with an average flight price of $570.

  • 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 $772. On the other hand, the most expensive day to fly is Saturday, where round-trip prices are $885 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 $728 on average. Morning departures are around 12% cheaper than evening flights, on average. The most expensive time of day to fly to the United Kingdom is generally at night, which is peak travel time and where the average cost of a ticket is $835.

  • 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 June and July, when the average cost of round-trip tickets is $1,016 and $912 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 3 weeks before departure. For the absolute cheapest price, our data suggests you should book 3 weeks before departure.

  • How long is the flight to the United Kingdom?

    An average nonstop flight from Illinois to the United Kingdom takes 13h 14m, covering a distance of 3896 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 (82% of total searches to the United Kingdom). The next most popular destinations are Edinburgh (7%) and Belfast (5%). Searches for flights to Manchester (2%), to Birmingham (1%) and to Inverness (1%) are also popular.

Book cheap flights from Illinois to the United Kingdom

Recent round-trip flight deals

9/25Thu
1 stopIcelandair
18h 55mORD-LHR
10/7Tue
1 stopIcelandair
11h 10mLHR-ORD
$529
9/15Mon
1 stopTAP AIR PORTUGAL
18h 40mORD-LHR
9/20Sat
1 stopTAP AIR PORTUGAL
16h 30mLHR-ORD
$551
9/22Mon
1 stopScandinavian Airlines
17h 15mORD-LHR
10/6Mon
1 stopScandinavian Airlines
26h 40mLHR-ORD
$567
7/23Wed
1 stop
17h 55mORD-LGW
8/27Wed
2 stops
18h 28mLGW-ORD
$575
10/6Mon
2 stopsScandinavian Airlines
15h 10mORD-LHR
10/13Mon
2 stopsScandinavian Airlines
25h 05mLHR-ORD
$576
7/23Wed
1 stop
17h 55mORD-LGW
8/27Wed
1 stop
18h 47mLGW-ORD
$583
8/18Mon
nonstopAmerican Airlines
7h 40mORD-LHR
8/28Thu
1 stopAmerican Airlines
14h 05mLHR-ORD
$609
8/18Mon
nonstopAmerican Airlines
7h 35mORD-LHR
8/28Thu
1 stopAmerican Airlines
12h 55mLHR-ORD
$610
8/19Tue
1 stopDelta
14h 29mORD-LGW
9/4Thu
1 stopDelta
15h 34mLGW-ORD
$614
8/4Mon
1 stopDelta
14h 30mORD-LGW
8/14Thu
1 stopDelta
15h 34mLGW-ORD
$644

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Recent one-way flight deals

7/22Tue
1 stop
34h 18mORD-LGW
$205
7/15Tue
1 stop
34h 18mORD-LGW
$206
10/15Wed
1 stopIcelandair
31h 40mORD-LHR
$210
10/15Wed
1 stopIcelandair
10h 25mORD-LGW
$215
8/14Thu
1 stopTAP AIR PORTUGAL
16h 00mORD-LHR
$249
8/7Thu
1 stopTAP AIR PORTUGAL
22h 05mORD-LHR
$277
10/14Tue
1 stopJetBlue
13h 55mORD-LHR
$354
7/10Thu
1 stopJetBlue
15h 50mORD-LHR
$363
9/14Sun
2 stopsScandinavian Airlines
20h 20mORD-LHR
$370
8/14Thu
2 stopsScandinavian Airlines
17h 35mORD-LHR
$435

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Last minute flights from Illinois to the United Kingdom

Last minute flight, train and bus deals

5/7Wed
multi-stopBritish Airways
12h 35mORD-LHR
5/9Fri
multi-stopBritish Airways
18h 40mLHR-ORD
$494
5/6Tue
multi-stopBritish Airways
16h 00mORD-EDI
5/8Thu
multi-stopBritish Airways
35h 15mEDI-ORD
$532
5/7Wed
multi-stop
10h 25mORD-LGW
5/12Mon
multi-stop
54h 02mLGW-ORD
$599
5/7Wed
multi-stopIcelandair
16h 05mORD-LHR
5/13Tue
multi-stopIcelandair
26h 50mLHR-ORD
$606
5/6Tue
multi-stopAer Lingus
11h 40mORD-LHR
5/13Tue
multi-stopAer Lingus
11h 10mLHR-ORD
$607
5/6Tue
multi-stopAer Lingus
11h 40mORD-LHR
5/14Wed
multi-stopAer Lingus
11h 35mLHR-ORD
$608
5/7Wed
multi-stopIcelandair
10h 25mORD-LGW
5/15Thu
multi-stopIcelandair
11h 35mLGW-ORD
$615
5/7Wed
nonstop
8h 15mORD-LHR
5/12Mon
multi-stop
25h 00mLHR-ORD
$624
5/5Mon
multi-stopSWISS
17h 15mORD-LGW
5/12Mon
multi-stopSWISS
23h 35mLGW-ORD
$630
5/5Mon
multi-stopSWISS
15h 50mORD-LHR
5/16Fri
multi-stopSWISS
12h 10mLHR-ORD
$634

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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 $4,475
Business Class flights to the United Kingdomfrom $775
Prem Econ Class flights to the United Kingdomfrom $1,569
Economy Class flights to the United Kingdomfrom $582

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