How long is the flight from Northern Ireland to Illinois?

Departing from Northern Ireland to Illinois will take you 16h 10m. There are 3644 mi between Northern Ireland and Illinois.

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.

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).

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

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Northern Ireland to Illinois as you normally would.

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.

£276+ Cheap Flights from Northern Ireland to Illinois

Cheap flight deals from Northern Ireland to Illinois

Enter your travel dates to find the best prices.

Cheapest

Best

Last-minute

One-way

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 23 August 2026.

Wed 7/1006:10 -

2 stops21h 15m

Wed 14/1019:25 -

2 stops19h 05m

Deal found 23/8£616

Thu 17/914:25 -

2 stops31h 45m

Thu 24/919:15 -

2 stops21h 35m

Deal found 20/8£625

Tue 20/1021:25 -

2 stops22h 35m

Sat 24/1016:45 -

2 stops12h 15m

Deal found 22/8£659

Fri 2/1008:20 -

2 stops15h 55m

Fri 9/1022:25 -

2 stops17h 25m

Deal found 18/8£679

Fri 9/1021:10 -

2 stops25h 43m

Mon 12/1014:15 -

3 stops20h 00m

Deal found 20/8£697

Mon 5/1006:40 -

2 stops33h 00m

Mon 12/1011:25 -

2 stops29h 55m

Deal found 21/8£706

Tue 20/1011:05 -

2 stops35h 05m

Sat 24/1019:15 -

3 stops20h 50m

Deal found 22/8£729

Fri 13/1108:35 -

1 stop16h 10m

Mon 16/1117:10 -

1 stop11h 40m

Deal found 18/8£750

Thu 5/1107:40 -

1 stop12h 05m

Mon 9/1118:50 -

1 stop15h 15m

Deal found 20/8£755

Thu 17/920:40 -

3 stops30h 01m

Thu 24/919:25 -

2 stops19h 40m

Deal found 20/8£758

Thu 17/906:30 -

1 stop14h 25m

Thu 24/922:25 -

1 stop11h 05m

Deal found 20/8£761

Find flight deals from Northern Ireland to Illinois

Round-trip from	£625
One-way from	£276

17/9-24/9
4 total stops
53h 20m total
Northern Ireland to Illinois

Search Deals

10/10
3 total stops
27h 35m total
Northern Ireland to Illinois

Search Deals

Cheapflights Fare Finder

Use the filters below to find and compare flights from Northern Ireland to Illinois that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

BelfastChicago

BFS Belfast Intl - ORD Chicago O'Hare Intl

BFSORD

Belfast Intl

Wed 7/10

06:10-21:25

2 stops21h 15m

Chicago O'Hare Intl

Wed 14/10

19:25-20:30

2 stops19h 05m

£616

BelfastChicago

BFS Belfast Intl - ORD Chicago O'Hare Intl

BFSORD

Belfast Intl

Thu 17/9

14:25-16:10

2 stops31h 45m

Chicago O'Hare Intl

Thu 24/9

19:15-22:50

2 stops21h 35m

£625

BelfastChicago

BFS Belfast Intl - ORD Chicago O'Hare Intl

BFSORD

Belfast Intl

Tue 20/10

21:25-14:00

2 stops22h 35m

Chicago O'Hare Intl

Sat 24/10

16:45-11:00

2 stops12h 15m

£659

BelfastChicago

BFS Belfast Intl - ORD Chicago O'Hare Intl

BFSORD

Belfast Intl

Fri 2/10

08:20-18:15

2 stops15h 55m

Chicago O'Hare Intl

Fri 9/10

22:25-21:50

2 stops17h 25m

£679

BelfastChicago

BFS Belfast Intl - ORD Chicago O'Hare Intl

BFSORD

Belfast Intl

Mon 5/10

21:35-14:55

2 stops23h 20m

Chicago O'Hare Intl

Mon 12/10

14:15-16:15

3 stops20h 00m

£679

BelfastChicago

BFS Belfast Intl - ORD Chicago O'Hare Intl

BFSORD

Belfast Intl

Fri 9/10

21:10-16:53

2 stops25h 43m

Chicago O'Hare Intl

Mon 12/10

14:15-16:15

3 stops20h 00m

£697

BelfastChicago

BHD Belfast City - ORD Chicago O'Hare Intl

BHDORD

Belfast City

Tue 20/10

11:05-16:10

2 stops35h 05m

Chicago O'Hare Intl

Sat 24/10

19:15-22:05

3 stops20h 50m

£729

BelfastChicago

BHD Belfast City - ORD Chicago O'Hare Intl

BHDORD

Belfast City

Fri 13/11

08:35-18:45

1 stop16h 10m

Chicago O'Hare Intl

Mon 16/11

17:10-10:50

1 stop11h 40m

£750

BelfastChicago

BHD Belfast City - ORD Chicago O'Hare Intl

BHDORD

Belfast City

Sat 21/11

11:45-19:15

1 stop13h 30m

Chicago O'Hare Intl

Wed 25/11

15:21-14:35

2 stops17h 14m

£750

Fastest return journey

BelfastChicago

BHD Belfast City - ORD Chicago O'Hare Intl

BHDORD

Belfast City

Thu 5/11

07:40-13:45

1 stop12h 05m

Chicago O'Hare Intl

Mon 9/11

18:50-16:05

1 stop15h 15m

£755

Flights are sorted by cheapest return flights first.

Deals found on 21/8

Showing 1-10 of 12 resultsSorted by cheapest first

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.

BFS-ORD

BHD-ORD

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

GBNIR-USIL

BFS-ORD

BHD-ORD

No data available for this route at this time. Please check back soon.

Related info for your journey

How long is the flight from Northern Ireland to Illinois?
Departing from Northern Ireland to Illinois will take you 16h 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.

See more FAQs

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Alternative routes for Northern Ireland to Illinois

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Fly with Cheapflights

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.

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Cheap flights from Northern Ireland to Illinois from £276

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 10/10. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Northern Ireland to Illinois

Cheapest flights from Northern Ireland to IllinoisExplore 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 23 August 2026.

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 23 August 2026.

Best flights from Northern Ireland to IllinoisDiscover carefully curated flight deals from Northern Ireland to Illinois that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 23 August 2026.

Discover carefully curated flight deals from Northern Ireland to Illinois that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 23 August 2026.

Last-minute flights from Northern Ireland to IllinoisDiscover last-minute flight deals from Northern Ireland to Illinois. Data last updated 23 August 2026 and is based on user searches.

Discover last-minute flight deals from Northern Ireland to Illinois. Data last updated 23 August 2026 and is based on user searches.

One-way flights from Northern Ireland to IllinoisSearch for one-way flight options from Northern Ireland to Illinois. Find affordable one-way fares based on user searches. Data last updated 23 August 2026.

Search for one-way flight options from Northern Ireland to Illinois. Find affordable one-way fares based on user searches. Data last updated 23 August 2026.

Find flight deals from Northern Ireland to Illinois

Round-trip from

One-way from

Cheapflights Fare Finder

Use the filters below to find and compare flights from Northern Ireland to Illinois that are best for you.

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.

Cheapflights Insights

Related info for your journey

How long is the flight from Northern Ireland to Illinois?

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

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

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

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.

Complete your trip

Complete your trip to Illinois by adding a car hire and/or hotel booking to your travel itinerary.

Direct flights to United States

Book a non-stop flight to one of these other cities located in United States.

Search flights from Northern Ireland to Illinois by cabin class

Find flights from Northern Ireland to Illinois, based on your preferred cabin class, be it economy, premium economy, business, or first class.

Northern Ireland and Illinois flights

Browse other Northern Ireland and Illinois flight options. Last updated on 23 August 2026.

Popular flight searches

Check out other popular destinations found by fellow travellers in 2026

Find a return flight route from Illinois

Find the right flight back to Northern Ireland after your stay in Illinois

Northern Ireland to Illinois flights

Consider these flights travelling from Northern Ireland to Illinois.

Fly with Cheapflights

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

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

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

Can Cheapflights notify me if prices for flights from Northern Ireland to Illinois become cheaper?

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Travel Smart

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 23 August 2026.

Best flights from Northern Ireland to Illinois
Discover carefully curated flight deals from Northern Ireland to Illinois that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 23 August 2026.

Last-minute flights from Northern Ireland to Illinois
Discover last-minute flight deals from Northern Ireland to Illinois. Data last updated 23 August 2026 and is based on user searches.

One-way flights from Northern Ireland to Illinois
Search for one-way flight options from Northern Ireland to Illinois. Find affordable one-way fares based on user searches. Data last updated 23 August 2026.