Find flights
When to book
Airlines
FAQs

Cheap flights from Northern Ireland to Illinois from £324

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 24/9. Fares are subject to change and may not be available on all flights or dates of travel.
BFS — ORD
3 set — 10 set1
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 29 agosto 2025.

Round-trip from

£493

One-way from

£324

Popular in

August

Cheapest in

November

Average price

£886
KLM
  • KLM
  • 24/9-21/10
  • 2 total stops
  • 32h 50m total
  • Northern Ireland to Illinois
Search Deals
24/9
  • 24/9
  • 3 total stops
  • 33h 30m total
  • Northern Ireland to Illinois
Search Deals
Highest demand for flights based on searches. 2% potential increase in price (£13 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£17 potential savings vs. average return price).
Search Deals
Average for round-trip flights in August 2025
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 29 agosto 2025.

mer 24/906:30BHD - ORD
1 stop14h 10mKLM
mar 21/1016:15ORD - BHD
1 stop18h 40mKLM
Deal found 28/8£493
mer 24/906:30BHD - ORD
2 stops17h 15mDelta
mar 21/1017:40ORD - BHD
2 stops21h 35mDelta
Deal found 27/8£497
mer 1/1007:25BFS - ORD
3 stops35h 10mMultiple Airlines
lun 6/1006:00ORD - BFS
2 stops27h 50mMultiple Airlines
Deal found 27/8£514
sab 11/1016:50BFS - ORD
2 stops29h 20mMultiple Airlines
sab 18/1009:55ORD - BFS
3 stops25h 55mMultiple Airlines
Deal found 27/8£644

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 29 agosto 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

BHD - ORD

BHDORD

Belfast City

mer 24/9

06:30-14:40

1 stop14h 10m

Chicago O'Hare Intl

mar 21/10

16:15-16:55

1 stop18h 40m

£493

BelfastChicago

BHD - ORD

BHDORD

Belfast City

mer 24/9

06:30-14:40

1 stop14h 10m

Chicago O'Hare Intl

mar 21/10

11:02-16:55

2 stops23h 53m

£493

BelfastChicago

BFS - ORD

BFSORD

Belfast Intl

mer 1/10

07:25-12:35

3 stops35h 10m

Chicago O'Hare Intl

lun 6/10

06:00-15:50

2 stops27h 50m

£514

BelfastChicago

BFS - ORD

BFSORD

Belfast Intl

lun 8/9

06:40-18:15

2 stops17h 35m

Chicago O'Hare Intl

lun 15/9

19:25-17:20

2 stops15h 55m

£617

BelfastChicago

BFS - ORD

BFSORD

Belfast Intl

sab 11/10

16:50-16:10

2 stops29h 20m

Chicago O'Hare Intl

sab 18/10

09:55-17:50

3 stops25h 55m

£644

BelfastChicago

BFS - ORD

BFSORD

Belfast Intl

ven 10/10

06:35-08:18

3 stops31h 43m

Chicago O'Hare Intl

ven 17/10

18:00-16:00

2 stops16h 00m

£759

BelfastChicago

BHD - ORD

BHDORD

Belfast City

mer 24/9

09:05-12:35

3 stops33h 30m

£324

BelfastChicago

BHD - ORD

BHDORD

Belfast City

gio 25/9

20:15-15:17

2 stops49h 02m

£346

BelfastChicago

BHD - ORD

BHDORD

Belfast City

mer 24/9

06:30-14:40

1 stop14h 10m

£930

BelfastChicago

BHD - ORD

BHDORD

Belfast City

gio 25/9

06:30-14:10

1 stop13h 40m

£960

Flights are sorted by cheapest return flights first.

Deals found on 26/8

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.

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 29 agosto 2025.
See what other customers who have flown with British Airways from Northern Ireland to Illinois have to say. 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
7,320 reviews
Check prices

Comfort

6.7

Boarding

6.9

Crew

7.6

Food

6.3

Entertainment

6.4

Overall

6.7

Reviews

1 / 20
6.0
Good

Anonymous,May 2025

LHR - LAX

We needed assistance (wheelchair, golf cart, whatever ) to get to next gate. We requested it. None was provided.
British Airways
6.7
Okay
7,320 reviews
British Airways
6.7
Okay
7,320 reviews
Check prices

Comfort

6.7

Boarding

6.9

Crew

7.6

Food

6.3

Entertainment

6.4

Overall

6.7

Reviews

1 / 20
6.0
Good

Anonymous,May 2025

LHR - LAX

We needed assistance (wheelchair, golf cart, whatever ) to get to next gate. We requested it. None was provided.

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 14h 10m. There are 3644 mi between Northern Ireland and Illinois.

  • 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Northern Ireland to Illinois

See prices for flight routes from nearby airports that may be better suited for you.
Heathrow to John F Kennedy Intl flights
Heathrow to Newark flights
Gatwick to John F Kennedy Intl flights
Heathrow to LaGuardia flights
Gatwick to Newark flights
London City to John F Kennedy Intl flights
London City to Newark flights
Gatwick to LaGuardia flights
Stansted to John F Kennedy Intl flights
London City to LaGuardia flights
Stansted to Newark flights
Luton to John F Kennedy Intl flights
Luton to Newark flights
Heathrow to Orlando flights
Heathrow to Miami flights
Heathrow to Los Angeles flights
Heathrow to Boston flights
Manchester to John F Kennedy Intl flights
Heathrow to Dulles Intl flights
Heathrow to O'Hare Intl flights
Heathrow to San Francisco flights
Heathrow to Las Vegas flights
Heathrow to Dallas/Fort Worth flights
Gatwick to Boston flights
Heathrow to Baltimore flights
Gatwick to Orlando flights
Manchester to Orlando flights
Luton to LaGuardia flights
Manchester to Newark flights
Heathrow to Hobby flights
Stansted to LaGuardia flights
Heathrow to Tampa flights
London City to Miami flights
London City to Los Angeles flights
Gatwick to Miami flights
Manchester to LaGuardia flights
Heathrow to Atlanta flights
Heathrow to Seattle flights
London City to Orlando flights
Gatwick to Dulles Intl flights
Heathrow to George Bush Intcntl flights
London City to Boston flights
Gatwick to Los Angeles flights
Edinburgh to Newark flights
London City to Dulles Intl flights
Gatwick to O'Hare Intl flights
Gatwick to San Francisco flights
Heathrow to Reagan-National flights
Heathrow to Austin flights
London City to O'Hare Intl flights

Top airline flying from Northern Ireland to Illinois

Discover the top airline that operate flights from Northern Ireland to Illinois. 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 858,174 searches. Data last updated 29 agosto 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest£481Average£617FlexibilityNo cancel feeOn-time70%
Search British Airways flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Northern Ireland to Illinois?

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to Illinois from Northern Ireland today with Cheapflights!

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

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.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.