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$505+ Cheap flights from Northern Ireland to Illinois

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 7/20. Fares are subject to change and may not be available on all flights or dates of travel.
BFS — ORD
Apr 22 — Apr 291
Tue 4/22
Tue 4/29
1 adult, Economy
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Cheap 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 April 17, 2025.

Round-trip from

$902
(Mytrip)

One-way from

$505
(Kiwi.com)

Popular in

March

Cheapest in

September

Average price

$995
From Northern Ireland to Illinois
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One-way flight from Northern Ireland to Illinois
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Highest demand for flights based on searches. 26% potential increase in price ($343 potential increase over avg. RT price).
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Cheapest flight prices on average. 8% potential price decrease ($71 potential savings vs. average RT price).
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Average for round-trip flights in April 2025
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Find flight deals from Northern Ireland to Illinois

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 April 17, 2025.

This Mytrip deal was found by Cheapflights users on 4/17. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/15:30 pmBFS - ORD
3 stops29h 10mMultiple Airlines
Sun 6/87:04 amORD - BFS
3 stops31h 16mMultiple Airlines
Deal found 4/17$902
This Delta deal was found by Cheapflights users on 4/16. 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.
Wed 5/76:30 amBHD - ORD
1 stop14h 10mDelta
Sat 5/1011:03 amORD - BHD
2 stops23h 52mDelta
Deal found 4/16$1,489
This KLM deal was found by Cheapflights users on 4/16. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/76:30 amBHD - ORD
2 stops16h 00mKLM
Sat 5/103:59 pmORD - BHD
2 stops18h 56mKLM
Deal found 4/16$1,494
This Virgin Atlantic deal was found by Cheapflights users on 4/17. 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 Virgin Atlantic is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/26:30 amBHD - ORD
1 stop13h 40mVirgin Atlantic
Fri 6/64:20 pmORD - BHD
1 stop22h 55mVirgin Atlantic
Deal found 4/17$1,564

Cheapflights Fare Finder

Customize 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 2,558,603 searches. Data last updated April 17, 2025.
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

Sun 6/1

5:30 pm-4:40 pm

3 stops29h 10m

Chicago O'Hare Intl

Sun 6/8

7:04 am-8:20 pm

3 stops31h 16m

$902

BelfastChicago

BHD - ORD

BHDORD

Belfast City

Wed 5/7

6:30 am-2:40 pm

1 stop14h 10m

Chicago O'Hare Intl

Sat 5/10

4:20 pm-4:55 pm

1 stop18h 35m

$1,489

BelfastChicago

BHD - ORD

BHDORD

Belfast City

Wed 5/7

6:30 am-2:40 pm

1 stop14h 10m

Chicago O'Hare Intl

Sat 5/10

3:33 pm-9:15 pm

2 stops23h 42m

$1,492

BelfastChicago

BHD - ORD

BHDORD

Belfast City

Mon 6/2

6:30 am-2:10 pm

1 stop13h 40m

Chicago O'Hare Intl

Fri 6/6

4:20 pm-9:15 pm

1 stop22h 55m

$1,564

BelfastChicago

BFS - ORD

BFSORD

Belfast Intl

Sun 7/20

10:55 pm-9:22 am

3 stops40h 27m

$505

BelfastChicago

BHD - ORD

BHDORD

Belfast City

Sun 7/20

6:40 am-11:10 pm

3 stops46h 30m

$686

BelfastChicago

BHD - ORD

BHDORD

Belfast City

Fri 5/16

10:20 am-7:00 pm

2 stops14h 40m

$808

BelfastChicago

BHD - ORD

BHDORD

Belfast City

Fri 5/16

6:30 am-2:10 pm

1 stop13h 40m

$1,684

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/15

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 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 Northern Ireland to Illinois

Rainfall in Illinois by month

Plan your trip to Illinois by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Illinois ranges from 1.7 - 4.9 inches per month. August is typically the wettest month, when rainfall can reach 4.9 in. January is typically the driest time to visit Illinois when rainfall is around 1.7 in.

Temperature in Illinois by month

Plan your trip to Illinois by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Illinois, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 23.0 F).

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 April 17, 2025.
Delta
8.0
Very good
7,917 reviews

Overall

8.0

Comfort

7.9

Entertainment

7.9

Crew

8.5

Food

7.3

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Delta
8.0
Very good
7,917 reviews
Delta
8.0
Very good
7,917 reviews

Overall

8.0

Comfort

7.9

Entertainment

7.9

Crew

8.5

Food

7.3

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
KLM
7.8
Good
1,329 reviews
Delta
8.0
Very good
7,917 reviews

Overall

8.0

Comfort

7.9

Entertainment

7.9

Crew

8.5

Food

7.3

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Virgin Atlantic
7.4
Good
642 reviews
Delta
8.0
Very good
7,917 reviews

Overall

8.0

Comfort

7.9

Entertainment

7.9

Crew

8.5

Food

7.3

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Aer Lingus
7.0
Good
1,063 reviews
Delta
8.0
Very good
7,917 reviews

Overall

8.0

Comfort

7.9

Entertainment

7.9

Crew

8.5

Food

7.3

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

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.

  • 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 vacation 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.

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

    Currently, August is the cheapest month in which you can book a flight from Northern Ireland to Illinois (average of $245). Flying from Northern Ireland to Illinois in March is currently the most expensive (average of $321). 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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See prices for flight routes from nearby airports that may be better suited for you.
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