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Cheap flights from Northern Ireland to Illinois from £322

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 17/6. Fares are subject to change and may not be available on all flights or dates of travel.
BFS — ORD
24 Mar — 31 Mar1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Northern Ireland to Illinois

Enter your travel dates to find the best prices.

Cheapest flights from Northern Ireland to Illinois
Explore the most affordable flight options available from Northern Ireland to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 22 February 2026.

Mon 13/415:35
BFS
-
ORD
2 stops32h 40m
Multiple Airlines
Mon 20/419:25
ORD
-
BFS
3 stops21h 55m
Multiple Airlines
Deal found 18/2£540
Mon 13/414:30
BHD
-
ORD
2 stops33h 45m
Multiple Airlines
Mon 20/419:25
ORD
-
BHD
2 stops15h 25m
Multiple Airlines
Deal found 18/2£574
Mon 13/406:30
BHD
-
ORD
1 stop11h 50m
American Airlines
Mon 20/419:05
ORD
-
BHD
1 stop11h 50m
American Airlines
Deal found 18/2£598
Mon 13/417:30
BHD
-
ORD
1 stop26h 45m
Virgin Atlantic
Mon 20/411:00
ORD
-
BHD
2 stops16h 20m
Virgin Atlantic
Deal found 18/2£613
Thu 19/306:35
BHD
-
ORD
2 stops22h 41m
British Airways
Mon 23/319:40
ORD
-
BHD
1 stop13h 35m
British Airways
Deal found 21/2£657
Mon 23/207:00
BHD
-
ORD
3 stops43h 20m
Multiple Airlines
Wed 25/221:50
ORD
-
BHD
2 stops17h 00m
Multiple Airlines
Deal found 19/2£794
Thu 9/408:10
BFS
-
ORD
2 stops37h 50m
Multiple Airlines
Sun 12/418:00
ORD
-
BFS
2 stops21h 50m
Multiple Airlines
Deal found 19/2£813
Thu 26/220:00
BHD
-
ORD
1 stop25h 25m
British Airways
Mon 2/316:10
ORD
-
BHD
2 stops16h 05m
British Airways
Deal found 18/2£842
Mon 23/208:30
BFS
-
ORD
2 stops14h 50m
Multiple Airlines
Wed 25/218:30
ORD
-
BFS
2 stops15h 00m
Multiple Airlines
Deal found 19/2£1,460

Find flight deals from Northern Ireland to Illinois

Keep the following information in mind while searching for Northern Ireland to Illinois flight deals. Data was last updated 22 February 2026.

Round-trip from

£540

One-way from

£322
13/4-20/4
  • 13/4-20/4
  • 5 total stops
  • 54h 35m total
  • Northern Ireland to Illinois
Search Deals
17/6
  • 17/6
  • 3 total stops
  • 32h 05m total
  • Northern Ireland to Illinois
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Northern Ireland to Illinois that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 22 February 2026.
Use the filters below to find and compare flights from Northern Ireland to Illinois that are best for you.

Fly from

Northern Ireland

Fly to

Illinois

Route

Depart

Return

Price

BelfastChicago

BFS - ORD

BFSORD

Belfast Intl

Mon 13/4

15:35-18:15

2 stops32h 40m

Chicago O'Hare Intl

Mon 20/4

19:25-23:20

3 stops21h 55m

£540

BelfastChicago

BHD - ORD

BHDORD

Belfast City

Mon 13/4

14:30-18:15

2 stops33h 45m

Chicago O'Hare Intl

Mon 20/4

19:25-16:50

2 stops15h 25m

£574

BelfastChicago

BHD - ORD

BHDORD

Belfast City

Mon 13/4

06:30-12:20

1 stop11h 50m

Chicago O'Hare Intl

Mon 20/4

19:05-12:55

1 stop11h 50m

£598

BelfastChicago

BHD - ORD

BHDORD

Belfast City

Mon 13/4

17:30-14:15

1 stop26h 45m

Chicago O'Hare Intl

Mon 20/4

11:00-09:20

2 stops16h 20m

£613

BelfastChicago

BHD - ORD

BHDORD

Belfast City

Thu 19/3

06:35-00:16

2 stops22h 41m

Chicago O'Hare Intl

Mon 23/3

19:40-14:15

1 stop13h 35m

£657

BelfastChicago

BFS - ORD

BFSORD

Belfast Intl

Thu 9/4

08:10-16:00

2 stops37h 50m

Chicago O'Hare Intl

Sun 12/4

18:00-21:50

2 stops21h 50m

£813

BelfastChicago

BHD - ORD

BHDORD

Belfast City

Thu 9/4

17:30-14:15

1 stop26h 45m

Chicago O'Hare Intl

Sun 12/4

09:50-09:20

2 stops17h 30m

£888

BelfastChicago

BHD - ORD

BHDORD

Belfast City

Wed 17/6

16:10-18:15

3 stops32h 05m

£322

BelfastChicago

BHD - ORD

BHDORD

Belfast City

Sun 12/7

20:10-19:15

3 stops29h 05m

£414

BelfastChicago

BFS - ORD

BFSORD

Belfast Intl

Wed 17/6

06:10-21:25

2 stops21h 15m

£438

Flights are sorted by cheapest return flights first.

Deals found on 19/2

Showing 1-10 of 19 results
1
2

Best time to book a flight from Northern Ireland to Illinois

Have a flexible travel schedule? Discover the best time to fly to Illinois from Northern Ireland with our price prediction graph.
Estimated return 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 Northern Ireland to Illinois
No data available for this route at this time. Please check back soon.

Reviews of airlines servicing Illinois

Get insights into the airlines that provide service to Illinois. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Illinois. Reviews last updated 22 February 2026.
See what other customers who have flown with British Airways from Northern Ireland to Illinois have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
British Airways
6.7
Okay
7,757 reviews
Check prices

Entertainment

6.4

Comfort

6.8

Overall

6.7

Crew

7.6

Food

6.4

Boarding

6.9

Reviews

1 / 20
6.0
Good

Roxanne,Sept 2025

LHR - IAD

Food was mediocre. Couldn't use headphones because no information on how to use. Staff paid so much attention on a family with a baby . They got VIP treatment.
British Airways
6.7
Okay
7,757 reviews
British Airways
6.7
Okay
7,757 reviews
Check prices

Entertainment

6.4

Comfort

6.8

Overall

6.7

Crew

7.6

Food

6.4

Boarding

6.9

Reviews

1 / 20
6.0
Good

Roxanne,Sept 2025

LHR - IAD

Food was mediocre. Couldn't use headphones because no information on how to use. Staff paid so much attention on a family with a baby . They got VIP treatment.

Related info for your journey

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

  • How long is the flight from Northern Ireland to Illinois?

    Departing from Northern Ireland to Illinois will take you 11h 50m. There are 3644 mi between Northern Ireland and Illinois. Both multi-stop and direct flights can be found to your destination and back.

  • Can I find deals for flights from Northern Ireland to Illinois that include hotel bookings?

    Yes. In addition to deals on Northern Ireland to Illinois flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Northern Ireland to Illinois?

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

  • Can I find deals for business class flights from Northern Ireland to Illinois?

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

See more FAQs

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Alternative routes for Northern Ireland to Illinois

See prices for flight routes from nearby airports that may be better suited for you.
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Top airline flying from Northern Ireland to Illinois

Discover the top airline that operate flights from Northern Ireland to Illinois. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 22 February 2026.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest£498Average£618FlexibilityNo cancel feeOn-time70%
Search British Airways flights

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How does Cheapflights help users find flights from Northern Ireland to Illinois?

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Millions of users choose and trust Cheapflights to book the best flight deals from Northern Ireland to Illinois for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

Can Cheapflights find flights from Northern Ireland to Illinois with no change fees?

Certainly. Search results for flights to Illinois from Northern Ireland shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

Can Cheapflights notify me if prices for flights from Northern Ireland to Illinois become cheaper?

Not ready to book yet? You can track prices for flights from Northern Ireland to Illinois on Cheapflights with our Price Alert feature and get notified when better prices are available.

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