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Cheap flights from Northern Ireland to Illinois from £473

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/3. Fares are subject to change and may not be available on all flights or dates of travel.
BFS — ORD
26 Feb — 5 Mar1
1 adult

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 21 February 2025.

Round-trip from

£473

Popular in

March

Cheapest in

September
British Airways
  • British Airways
  • 4/3-26/3
  • 2 total stops
  • 44h 05m total
  • Northern Ireland to Illinois
Search Deals
Highest demand for flights based on searches. 28% potential increase in price (£237 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 7% potential price decrease (£45 potential savings vs. average return price).
Search Deals

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 21 February 2025.

Sun 2/306:30BHD - ORD
1 stop18h 15mBritish Airways
Wed 26/319:30ORD - BHD
1 stop13h 45mBritish Airways
Deal found 20/2£473
Tue 4/317:20BHD - ORD
1 stop27h 10mMultiple Airlines
Wed 26/318:15ORD - BHD
2 stops17h 35mMultiple Airlines
Deal found 20/2£500
Thu 27/217:20BHD - ORD
1 stop27h 10mKLM
Mon 3/316:25ORD - BHD
1 stop18h 25mKLM
Deal found 20/2£517
Fri 28/206:30BHD - ORD
1 stop14h 00mVirgin Atlantic
Wed 5/316:25ORD - BHD
1 stop22h 35mVirgin Atlantic
Deal found 21/2£518
Thu 27/206:30BHD - ORD
2 stops20h 23mDelta
Mon 3/313:40ORD - BHD
2 stops21h 10mDelta
Deal found 20/2£522
Sat 1/309:10BHD - ORD
1 stop13h 50mAmerican Airlines
Sat 29/313:49ORD - BHD
2 stops14h 21mAmerican Airlines
Deal found 20/2£524
Tue 4/308:35BFS - ORD
2 stops36h 55mMultiple Airlines
Wed 26/320:15ORD - BFS
2 stops18h 20mMultiple Airlines
Deal found 20/2£524
Tue 1/414:25BHD - ORD
2 stops29h 35mAer Lingus
Tue 22/415:45ORD - BHD
2 stops15h 05mAer Lingus
Deal found 20/2£732
Tue 1/416:25BHD - ORD
1 stop30h 35mFinnair
Tue 22/420:30ORD - BHD
2 stops33h 25mFinnair
Deal found 20/2£790

Find flights from Northern Ireland to Illinois within your budget

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 21 February 2025.

Fly from

Northern Ireland

Fly to

Illinois

Route

Depart

Return

Price

BelfastChicago

BHD - ORD

BHDORD

Belfast City

Tue 4/3

09:55-17:00

1 stop13h 05m

Chicago O'Hare Intl

Wed 26/3

19:30-07:30

1 stop31h 00m

£473

BelfastChicago

BHD - ORD

BHDORD

Belfast City

Tue 4/3

17:20-14:30

1 stop27h 10m

Chicago O'Hare Intl

Wed 26/3

18:15-16:50

2 stops17h 35m

£500

BelfastChicago

BHD - ORD

BHDORD

Belfast City

Thu 6/3

06:35-13:55

1 stop13h 20m

Chicago O'Hare Intl

Sun 23/3

16:27-13:55

2 stops16h 28m

£524

BelfastChicago

BFS - ORD

BFSORD

Belfast Intl

Tue 4/3

08:35-15:30

2 stops36h 55m

Chicago O'Hare Intl

Wed 26/3

20:15-19:35

2 stops18h 20m

£524

BelfastChicago

BHD - ORD

BHDORD

Belfast City

Tue 1/4

14:25-14:00

2 stops29h 35m

Chicago O'Hare Intl

Tue 22/4

15:45-12:50

2 stops15h 05m

£732

BelfastChicago

BHD - ORD

BHDORD

Belfast City

Tue 1/4

17:25-14:40

1 stop27h 15m

Chicago O'Hare Intl

Tue 22/4

16:50-16:55

1 stop18h 05m

£789

BelfastChicago

BHD - ORD

BHDORD

Belfast City

Tue 1/4

16:25-17:00

1 stop30h 35m

Chicago O'Hare Intl

Tue 22/4

20:30-11:55

2 stops33h 25m

£790

BelfastChicago

BHD - ORD

BHDORD

Belfast City

Fri 16/5

10:20-19:00

2 stops14h 40m

£626

BelfastChicago

BHD - ORD

BHDORD

Belfast City

Fri 16/5

06:30-14:10

1 stop13h 40m

£1,276

Flights are sorted by cheapest return flights first.

Deals found on 21/2

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.

Travel insights for flights from Northern Ireland to Illinois

Get recent, data-driven insights about flights from Northern Ireland to Illinois including ideal travel times, pricing trends, and more.

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 43.0 - 125.0 inches per month. August is typically the wettest month, when rainfall can reach 125.0 mm. January is typically the driest time to visit Illinois when rainfall is around 43.0 mm.

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 23.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around -5.0 C).

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 21 February 2025.
Peruse reviews from past customers who have flown with Delta, KLM and Finnair from Northern Ireland to Illinois to help guide your decision. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very Good
8,212 reviews
Check prices

Food

7.3

Boarding

8.2

Overall

8.0

Entertainment

7.9

Comfort

8.0

Crew

8.5

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
8,212 reviews
Delta
8.0
Very Good
8,212 reviews
Check prices

Food

7.3

Boarding

8.2

Overall

8.0

Entertainment

7.9

Comfort

8.0

Crew

8.5

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
1,333 reviews
Delta
8.0
Very Good
8,212 reviews
Check prices

Food

7.3

Boarding

8.2

Overall

8.0

Entertainment

7.9

Comfort

8.0

Crew

8.5

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

Finnair
7.6
Good
1,273 reviews
Delta
8.0
Very Good
8,212 reviews
Check prices

Food

7.3

Boarding

8.2

Overall

8.0

Entertainment

7.9

Comfort

8.0

Crew

8.5

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

American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very Good
8,212 reviews
Check prices

Food

7.3

Boarding

8.2

Overall

8.0

Entertainment

7.9

Comfort

8.0

Crew

8.5

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
1,070 reviews
Delta
8.0
Very Good
8,212 reviews
Check prices

Food

7.3

Boarding

8.2

Overall

8.0

Entertainment

7.9

Comfort

8.0

Crew

8.5

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 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.

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

    Currently, January is the cheapest month in which you can book a flight from Northern Ireland to Illinois (average of £595). Flying from Northern Ireland to Illinois in July is currently the most expensive (average of £843). 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 Northern Ireland to Illinois

See prices for flight routes from nearby airports that may be better suited for you.
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