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Cheap flights from Illinois to Northern Ireland from £335

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 14/11. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — BFS
5 Dec — 12 Dec1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Illinois to Northern Ireland

Keep the following information in mind while searching for Illinois to Northern Ireland flight deals. Data was last updated 5 November 2025.

Round-trip from

£470

One-way from

£335
British Airways
  • British Airways
  • 12/1-20/1
  • 4 total stops
  • 35h 32m total
  • Illinois to Northern Ireland
Search Deals
British Airways
  • British Airways
  • 14/11
  • 1 total stop
  • 11h 35m total
  • Illinois to Northern Ireland
Search Deals

Find flight deals from Illinois to Northern Ireland

Enter your travel dates to find the best prices.

Cheapest flights from Illinois to Northern Ireland
Explore the most affordable flight options available from Illinois to Northern Ireland. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 5 November 2025.

Thu 4/1218:30ORD - BFS
2 stops21h 50mMultiple Airlines
Thu 11/1206:30BFS - ORD
2 stops16h 50mMultiple Airlines
Deal found 4/11£538
Wed 3/1216:25ORD - BHD
1 stop22h 35mVirgin Atlantic
Sun 7/1206:30BHD - ORD
1 stop13h 50mVirgin Atlantic
Deal found 3/11£545
Thu 4/1218:30ORD - BHD
2 stops19h 05mMultiple Airlines
Thu 11/1207:25BHD - ORD
2 stops15h 55mMultiple Airlines
Deal found 4/11£550
Mon 1/1215:43STL - BHD
2 stops16h 32mAmerican Airlines
Sun 7/1209:10BHD - STL
2 stops20h 28mAmerican Airlines
Deal found 4/11£584
Thu 4/1221:45ORD - BHD
1 stop28h 40mBritish Airways
Thu 11/1211:05BHD - ORD
1 stop11h 55mBritish Airways
Deal found 4/11£646
Wed 3/1213:17ORD - BHD
2 stops13h 53mAmerican Airlines
Sun 7/1212:10BHD - ORD
2 stops15h 10mAmerican Airlines
Deal found 3/11£747
Tue 30/1218:30ORD - BHD
1 stop11h 00mAmerican Airlines
Mon 5/106:35BHD - ORD
2 stops17h 21mAmerican Airlines
Deal found 4/11£807
Tue 30/1217:10ORD - BHD
1 stop12h 20mBritish Airways
Mon 5/119:25BHD - ORD
1 stop26h 00mBritish Airways
Deal found 4/11£813
Fri 19/1219:40ORD - BFS
2 stops20h 20mMultiple Airlines
Fri 26/1220:50BFS - ORD
2 stops23h 10mMultiple Airlines
Deal found 4/11£958

Cheapflights Fare Finder

 
Customise your flight search to find flights from Illinois to Northern Ireland 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 5 November 2025.
Use the filters below to find and compare flights from Illinois to Northern Ireland that are best for you.

Fly from

Illinois

Fly to

Northern Ireland

Route

Depart

Return

Price

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Mon 12/1

18:44-18:35

2 stops17h 51m

Belfast City

Tue 20/1

06:35-18:16

2 stops17h 41m

£470

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Mon 12/1

15:37-14:15

2 stops16h 38m

Belfast City

Tue 20/1

06:35-21:15

2 stops20h 40m

£486

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Mon 2/2

15:54-16:05

2 stops18h 11m

Belfast City

Tue 10/2

10:00-21:15

2 stops17h 15m

£486

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Sun 1/2

11:05-10:20

2 stops17h 15m

Belfast City

Tue 10/2

10:00-22:59

2 stops18h 59m

£494

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Wed 18/3

22:45-14:15

1 stop10h 30m

Belfast City

Sun 22/3

12:10-14:50

1 stop31h 40m

£536

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Thu 4/12

18:30-22:20

2 stops21h 50m

Belfast Intl

Thu 11/12

06:30-17:20

2 stops16h 50m

£538

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Wed 3/12

16:25-21:00

1 stop22h 35m

Belfast City

Sun 7/12

06:30-14:20

1 stop13h 50m

£545

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Fri 3/4

21:15-15:30

1 stop12h 15m

Belfast City

Tue 7/4

06:35-13:50

1 stop13h 15m

£548

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Thu 4/12

18:30-19:35

2 stops19h 05m

Belfast City

Thu 11/12

07:25-17:20

2 stops15h 55m

£550

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Sun 1/3

11:21-16:50

2 stops23h 29m

Belfast City

Thu 5/3

17:20-20:41

2 stops33h 21m

£571

Flights are sorted by cheapest return flights first.

Deals found on 3/11

Showing 1-10 of 18 results
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Best time to book a flight from Illinois to Northern Ireland

Have a flexible travel schedule? Discover the best time to fly to Northern Ireland from Illinois 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 Illinois to Northern Ireland
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 Illinois to Northern Ireland. 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 Illinois to Northern Ireland?

    Airlines like British Airways, American Airlines, and Virgin Atlantic fly from Illinois to Northern Ireland in about 16h 38m. The time it takes to get you to your destination can typically vary by up to 5h 57m. Airlines will cover a distance of 3893 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Illinois to Northern Ireland 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 Illinois to Northern Ireland

See prices for flight routes from nearby airports that may be better suited for you.
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How does Cheapflights help users find flights from Illinois to Northern Ireland?

Cheapflights helps you search for flights from Illinois to Northern Ireland via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

Why should you use Cheapflights to find cheap flight tickets from Illinois to Northern Ireland?

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Northern Ireland from Illinois.

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

Yes, we can. To see specific flights from Illinois to Northern Ireland with no change fees, users can toggle flexible booking options after using the search form above to find flights.

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Of course! You can now track prices for flights from Illinois to Northern Ireland and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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