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Cheap flights from Northern Ireland to Illinois from £291

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 15/9. Fares are subject to change and may not be available on all flights or dates of travel.
BFS — ORD
17 Aug — 24 Aug1
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 18 July 2026.

Sun 30/809:35
BFS
-
ORD
3 stops41h 45m
Multiple Airlines
Sun 6/922:25
ORD
-
BFS
2 stops16h 35m
Multiple Airlines
Deal found 16/7£609
Tue 1/922:30
BFS
-
ORD
3 stops44h 10m
Multiple Airlines
Tue 8/909:50
ORD
-
BFS
2 stops27h 50m
Multiple Airlines
Deal found 18/7£635
Wed 19/807:35
BFS
-
ORD
3 stops37h 09m
Multiple Airlines
Thu 27/819:25
ORD
-
BFS
2 stops21h 00m
Multiple Airlines
Deal found 14/7£637
Thu 27/808:20
BFS
-
ORD
3 stops36h 24m
Multiple Airlines
Sun 30/819:25
ORD
-
BFS
2 stops19h 35m
Multiple Airlines
Deal found 18/7£662
Tue 11/822:45
BFS
-
ORD
2 stops22h 10m
Multiple Airlines
Sun 16/808:40
ORD
-
BFS
3 stops32h 10m
Multiple Airlines
Deal found 14/7£674
Mon 7/906:30
BHD
-
ORD
1 stop16h 45m
American Airlines
Mon 14/919:05
ORD
-
BHD
1 stop11h 50m
American Airlines
Deal found 15/7£679
Mon 7/917:30
BHD
-
ORD
1 stop26h 45m
KLM
Mon 14/912:29
ORD
-
BHD
2 stops14h 51m
KLM
Deal found 15/7£696
Mon 7/909:50
BHD
-
ORD
2 stops18h 54m
Delta
Mon 14/911:17
ORD
-
BHD
2 stops16h 03m
Delta
Deal found 15/7£699
Mon 7/909:50
BHD
-
ORD
3 stops41h 30m
Multiple Airlines
Mon 14/909:50
ORD
-
BHD
3 stops24h 40m
Multiple Airlines
Deal found 15/7£742
Mon 3/817:30
BHD
-
ORD
1 stop26h 45m
Delta
Fri 7/813:59
ORD
-
BHD
2 stops20h 56m
Delta
Deal found 17/7£1,706
Mon 3/809:50
BHD
-
ORD
2 stops17h 57m
Virgin Atlantic
Fri 7/813:59
ORD
-
BHD
2 stops20h 56m
Virgin Atlantic
Deal found 17/7£1,711

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 18 July 2026.

Round-trip from

£609

One-way from

£291
30/8-6/9
  • 30/8-6/9
  • 5 total stops
  • 58h 20m total
  • Northern Ireland to Illinois
Search Deals
15/9
  • 15/9
  • 3 total stops
  • 49h 20m 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 18 July 2026.
Use the filters below to find and compare flights from Northern Ireland to Illinois that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

BelfastChicago

BFS - ORD

BFSORD

Belfast Intl

Sun 30/8

09:35-21:20

3 stops41h 45m

Chicago O'Hare Intl

Sun 6/9

22:25-21:00

2 stops16h 35m

£609

BelfastChicago

BFS - ORD

BFSORD

Belfast Intl

Wed 19/8

07:35-16:57

2 stops15h 22m

Chicago O'Hare Intl

Thu 27/8

19:25-22:25

2 stops21h 00m

£647

BelfastChicago

BFS - ORD

BFSORD

Belfast Intl

Tue 1/9

06:15-18:15

2 stops18h 00m

Chicago O'Hare Intl

Tue 8/9

19:25-21:05

2 stops19h 40m

£673
Fastest return journey

BelfastChicago

BHD - ORD

BHDORD

Belfast City

Mon 7/9

06:30-17:15

1 stop16h 45m

Chicago O'Hare Intl

Mon 14/9

19:05-12:55

1 stop11h 50m

£679

BelfastChicago

BHD - ORD

BHDORD

Belfast City

Mon 7/9

09:50-21:20

3 stops41h 30m

Chicago O'Hare Intl

Mon 14/9

19:25-20:30

2 stops19h 05m

£696

BelfastChicago

BHD - ORD

BHDORD

Belfast City

Mon 7/9

09:50-22:44

2 stops18h 54m

Chicago O'Hare Intl

Mon 14/9

11:17-09:20

2 stops16h 03m

£699

BelfastChicago

BFS - ORD

BFSORD

Belfast Intl

Sun 20/9

21:25-20:12

3 stops28h 47m

Chicago O'Hare Intl

Fri 25/9

19:25-23:20

3 stops21h 55m

£714

BelfastChicago

BFS - ORD

BFSORD

Belfast Intl

Mon 7/9

14:40-14:25

2 stops29h 45m

Chicago O'Hare Intl

Mon 14/9

17:10-19:05

1 stop19h 55m

£729

BelfastChicago

BFS - ORD

BFSORD

Belfast Intl

Thu 27/8

06:10-23:08

2 stops22h 58m

Chicago O'Hare Intl

Sun 30/8

17:10-15:00

1 stop15h 50m

£790

BelfastChicago

BHD - ORD

BHDORD

Belfast City

Mon 3/8

17:30-14:15

1 stop26h 45m

Chicago O'Hare Intl

Fri 7/8

17:57-16:55

2 stops16h 58m

£1,706

Flights are sorted by cheapest return flights first.

Deals found on 14/7

Showing 1-10 of 14 resultsSorted by cheapest first
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.

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 16h 45m. 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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Heathrow to Tampa flights
London City to Los Angeles flights
London City to Orlando flights
London City to San Francisco flights
Heathrow to Ontario flights
London City to Boston flights
Gatwick to O'Hare Intl flights
Stansted to San Francisco flights
Manchester to Newark flights
Manchester to LaGuardia flights
Luton to Los Angeles flights
Heathrow to Denver flights
Stansted to O'Hare Intl flights

Fly with Cheapflights

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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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