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Northern Ireland

$355+ Cheap flights from Illinois to Northern Ireland

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 9/26. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — BFS
Oct 15 — Oct 221
Wed 10/15
Wed 10/22
1 adult, Economy
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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 September 15, 2025.

Round-trip from

$583
(Trip.com)

One-way from

$355
(Kiwi.com)
From Illinois to Northern Ireland
Search Deals
One-way flight from Illinois to Northern Ireland
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Find flight deals from Illinois to Northern Ireland

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 September 15, 2025.

This Trip.com deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/291:26 pmSTL - BFS
2 stops27h 44mMultiple Airlines
Tue 10/76:45 amBFS - STL
2 stops21h 19mMultiple Airlines
Deal found 9/15$583
This British Airways deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/59:45 pmORD - BHD
1 stop13h 30mBritish Airways
Tue 12/910:00 amBHD - ORD
1 stop14h 45mBritish Airways
Deal found 9/14$632
This oojo deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/306:10 pmORD - BHD
1 stop19h 40mBritish Airways
Mon 11/102:50 pmBHD - ORD
1 stop29h 00mBritish Airways
Deal found 9/14$641
This Iberia deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/276:10 pmORD - BHD
1 stop15h 05mMultiple Airlines
Sun 11/25:30 amBHD - ORD
2 stops17h 08mMultiple Airlines
Deal found 9/13$642
This FlightHub deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/275:11 pmORD - BHD
2 stops17h 54mBritish Airways
Sun 11/28:25 pmBHD - ORD
2 stops28h 55mBritish Airways
Deal found 9/13$653
This American Airlines deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/279:45 pmORD - BHD
1 stop11h 30mAmerican Airlines
Sun 11/210:40 amBHD - ORD
1 stop12h 20mAmerican Airlines
Deal found 9/13$655
This Expedia deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/315:11 pmORD - BHD
2 stops16h 04mBritish Airways
Mon 11/107:25 pmBHD - ORD
1 stop24h 25mBritish Airways
Deal found 9/14$690
This British Airways deal was found by Cheapflights users on 9/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/35:10 pmORD - BHD
1 stop11h 05mBritish Airways
Sun 12/76:30 amBHD - ORD
1 stop18h 15mBritish Airways
Deal found 9/12$697
This Iberia deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/306:10 pmORD - BHD
1 stop17h 30mMultiple Airlines
Sun 11/25:30 amBHD - ORD
2 stops17h 15mMultiple Airlines
Deal found 9/14$702
This American Airlines deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/297:59 pmSTL - BHD
2 stops15h 31mAmerican Airlines
Tue 10/79:35 amBHD - STL
2 stops17h 54mAmerican Airlines
Deal found 9/15$706
This FlightHub deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/128:40 pmORD - BHD
1 stop15h 00mBritish Airways
Sun 10/198:05 pmBHD - ORD
1 stop23h 45mBritish Airways
Deal found 9/13$712
This Delta deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/34:15 pmORD - BHD
1 stop23h 00mDelta
Tue 10/76:30 amBHD - ORD
1 stop13h 40mDelta
Deal found 9/14$722

Cheapflights Fare Finder

 
Customize 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 2,558,603 searches. Data last updated September 15, 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 - BFS

STLBFS

Lambert-St Louis

Mon 9/29

1:26 pm-11:10 pm

2 stops27h 44m

Belfast Intl

Tue 10/7

6:45 am-10:04 pm

2 stops21h 19m

$583

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Fri 12/5

9:45 pm-5:15 pm

1 stop13h 30m

Belfast City

Tue 12/9

10:00 am-6:45 pm

1 stop14h 45m

$632

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Thu 10/30

6:10 pm-6:50 pm

1 stop19h 40m

Belfast City

Mon 11/10

2:50 pm-1:50 pm

1 stop29h 00m

$641

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Mon 10/27

5:11 pm-4:05 pm

2 stops17h 54m

Belfast City

Sun 11/2

8:25 pm-7:20 pm

2 stops28h 55m

$653

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Mon 10/27

9:45 pm-2:15 pm

1 stop11h 30m

Belfast City

Sun 11/2

10:40 am-5:00 pm

1 stop12h 20m

$655

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Fri 10/31

6:10 pm-10:30 am

1 stop11h 20m

Belfast City

Mon 11/10

7:25 pm-1:50 pm

1 stop24h 25m

$697

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Wed 12/3

5:10 pm-10:15 am

1 stop11h 05m

Belfast City

Sun 12/7

6:30 am-6:45 pm

1 stop18h 15m

$697

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Thu 10/30

6:10 pm-4:40 pm

1 stop17h 30m

Belfast City

Sun 11/2

5:30 am-5:45 pm

2 stops17h 15m

$702

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Mon 9/29

7:59 pm-5:30 pm

2 stops15h 31m

Belfast City

Tue 10/7

9:35 am-9:29 pm

2 stops17h 54m

$706

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Sun 10/12

8:40 pm-5:40 pm

1 stop15h 00m

Belfast City

Sun 10/19

8:05 pm-1:50 pm

1 stop23h 45m

$712

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/13

Showing 1-10 of 31 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 round-trip 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

What is the cheapest time of day to fly from IL to NIR?

Find hourly flight availability from Illinois to Northern Ireland. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 15, 2025.

When flying from Illinois to Northern Ireland, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Reviews of airlines servicing Northern Ireland

Get insights into the airlines that provide service to Northern Ireland. 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 Northern Ireland. Reviews last updated September 15, 2025.
Get a feel of what it's like to fly with British Airways from Illinois to Northern Ireland by reading reviews from past customers. 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
7,361 reviews

Comfort

6.7

Food

6.3

Crew

7.6

Entertainment

6.4

Boarding

6.9

Overall

6.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2025

IAD - LHR

The plane had to load and unload passengers not through a jet way but out on the tarmac at Heathrow. The steps were steep. We weren't expecting to have to carry our luggage up and down stairs.
British Airways
6.7
Okay
7,361 reviews
British Airways
6.7
Okay
7,361 reviews

Comfort

6.7

Food

6.3

Crew

7.6

Entertainment

6.4

Boarding

6.9

Overall

6.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2025

IAD - LHR

The plane had to load and unload passengers not through a jet way but out on the tarmac at Heathrow. The steps were steep. We weren't expecting to have to carry our luggage up and down stairs.

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?

    A quick flight from Illinois to Northern Ireland can take about 11h 30m. British Airways provides one of the quickest options available for as low as $655. Illinois and Northern Ireland are separated by a distance of 3644 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • 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 vacation 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.

  • What is the cheapest month to book a flight from Illinois to Northern Ireland?

    Currently, February is the cheapest month in which you can book a flight from Illinois to Northern Ireland (average of $657). Flying from Illinois to Northern Ireland in June is currently the most expensive (average of $1,189). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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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Top airline flying from Illinois to Northern Ireland

Discover the top airline that operate flights from Illinois to Northern Ireland. 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 2,558,603 searches. Data last updated September 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$577Average$720FlexibilityNo cancel feeOn-time70%

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