What are the cheapest airlines to fly from Illinois to Northern Ireland one-way?

To fly one-way, consider booking your trip with British Airways, which is currently one of the cheapest options available, starting at £297. Delta flights start at £324 while deals on American Airlines start at £336 one-way.

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

Currently, January is the cheapest month in which you can book a flight from Illinois to Northern Ireland (average of £67). Flying from Illinois to Northern Ireland in July is currently the most expensive (average of £90). 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.

What is the cheapest month to fly from Illinois to Northern Ireland?

September can be a great time to fly to Northern Ireland from Illinois with a flight ticket averaging about £702. Cheapflights users have found deals in the month of September for as cheap as £430. The most expensive prices can be found in the month of May.

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

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

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 holiday 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.

£238+ Flights from Illinois to Northern Ireland

Cheap flight deals from Illinois to Northern Ireland

Round-trip from	£497
One-way from	£238
Popular in	May
Cheapest in	September
Average price	£1,002

Iberia
8/9-15/9
2 total stops
44h 55m total
Illinois to Northern Ireland

Search Deals

26/8
2 total stops
29h 20m total
Illinois to Northern Ireland

Search Deals

Highest demand for flights based on searches. 26% potential increase in price (£189 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 6% potential price decrease (£30 potential savings vs. average return price).

Search Deals

Average for round-trip flights in April 2025

Search Deals

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 22 April 2025.

Mon 8/922:35ORD - BHD

1 stop12h 55mIberia

Mon 15/909:50BHD - ORD

1 stop32h 00mIberia

Deal found 20/4£497

Mon 8/921:15ORD - BHD

1 stop12h 25mMultiple Airlines

Mon 15/919:30BHD - ORD

1 stop25h 20mMultiple Airlines

Deal found 20/4£498

Mon 28/422:20ORD - BHD

1 stop15h 15mAmerican Airlines

Tue 13/506:35BHD - ORD

1 stop13h 15mAmerican Airlines

Deal found 21/4£505

Wed 13/819:15ORD - BHD

1 stop10h 40mBritish Airways

Sun 24/811:00BHD - ORD

1 stop13h 15mBritish Airways

Deal found 21/4£534

Mon 28/418:15ORD - BHD

2 stops16h 40mKLM

Tue 13/506:30BHD - ORD

2 stops16h 59mKLM

Deal found 21/4£536

Wed 4/608:50ORD - BFS

2 stops27h 45mMultiple Airlines

Wed 11/617:20BFS - ORD

2 stops28h 05mMultiple Airlines

Deal found 21/4£559

Sat 13/920:01STL - BHD

2 stops33h 29mBritish Airways

Tue 16/1217:10BHD - STL

2 stops28h 57mBritish Airways

Deal found 22/4£560

Thu 5/612:48MDW - BFS

2 stops24h 52mMultiple Airlines

Thu 12/608:10BFS - MDW

2 stops19h 35mMultiple Airlines

Deal found 21/4£745

Thu 5/616:20ORD - BHD

1 stop22h 55mVirgin Atlantic

Thu 12/606:30BHD - ORD

1 stop13h 40mVirgin Atlantic

Deal found 21/4£746

Mon 8/918:50MDW - BHD

2 stops20h 25mDelta

Mon 15/906:30BHD - MDW

2 stops18h 06mDelta

Deal found 20/4£775

Fri 6/613:30ORD - BHD

2 stops21h 25mDelta

Fri 13/606:30BHD - ORD

1 stop13h 40mDelta

Deal found 22/4£788

Tue 3/605:20STL - BHD

3 stops30h 20mMultiple Airlines

Tue 10/607:05BHD - STL

3 stops35h 31mMultiple Airlines

Deal found 22/4£853

Best flights from Illinois to Northern Ireland
Discover carefully curated flight deals from Illinois to Northern Ireland that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 22 April 2025.

Mon 8/922:35ORD - BHD

1 stop12h 55mIberia

Mon 15/909:50BHD - ORD

1 stop32h 00mIberia

Deal found 20/4£497

Mon 8/921:15ORD - BHD

1 stop12h 25mMultiple Airlines

Mon 15/919:30BHD - ORD

1 stop25h 20mMultiple Airlines

Deal found 20/4£498

Mon 8/918:25ORD - BHD

2 stops17h 05mBritish Airways

Mon 15/919:30BHD - ORD

2 stops50h 37mBritish Airways

Deal found 20/4£505

Thu 21/820:35ORD - BHD

1 stop12h 55mAmerican Airlines

Thu 4/906:35BHD - ORD

2 stops15h 10mAmerican Airlines

Deal found 22/4£538

Thu 5/616:20ORD - BHD

1 stop22h 55mVirgin Atlantic

Thu 12/606:30BHD - ORD

1 stop13h 40mVirgin Atlantic

Deal found 21/4£746

Mon 8/918:50MDW - BHD

2 stops20h 25mDelta

Mon 15/906:30BHD - MDW

2 stops18h 06mDelta

Deal found 20/4£775

Mon 11/814:39STL - BHD

3 stops19h 46mAer Lingus

Sun 17/810:20BHD - STL

3 stops19h 29mAer Lingus

Deal found 22/4£945

Wed 4/608:50ORD - BFS

2 stops27h 45mMultiple Airlines

Wed 11/617:20BFS - ORD

2 stops28h 05mMultiple Airlines

Deal found 21/4£559

Fri 6/618:31MDW - BHD

2 stops16h 24mKLM

Fri 13/606:30BHD - MDW

2 stops17h 10mKLM

Deal found 22/4£1,122

Mon 11/816:52STL - BHD

2 stops16h 48mBritish Airways

Sun 17/820:05BHD - STL

2 stops30h 08mBritish Airways

Deal found 22/4£647

Fri 6/613:30ORD - BHD

2 stops21h 25mDelta

Fri 13/606:30BHD - ORD

1 stop13h 40mDelta

Deal found 22/4£788

Thu 5/612:48MDW - BFS

2 stops24h 52mMultiple Airlines

Thu 12/608:10BFS - MDW

2 stops19h 35mMultiple Airlines

Deal found 21/4£745

Last-minute flights from Illinois to Northern Ireland
Discover last-minute flight deals from Illinois to Northern Ireland. Data last updated 22 April 2025 and is based on user searches.

Tue 22/420:20ORD - BHD

1 stop13h 00mIberia

Tue 29/416:25BHD - ORD

1 stop25h 20mIberia

Deal found 21/4£5,576

Mon 28/422:20ORD - BHD

1 stop15h 15mAmerican Airlines

Tue 13/506:35BHD - ORD

1 stop13h 15mAmerican Airlines

Deal found 21/4£505

Mon 28/418:15ORD - BHD

2 stops16h 40mKLM

Tue 13/506:30BHD - ORD

2 stops16h 59mKLM

Deal found 21/4£536

Wed 30/415:10ORD - BHD

2 stops14h 45mBritish Airways

Sat 10/507:05BHD - ORD

2 stops20h 38mBritish Airways

Deal found 22/4£552

Sun 4/519:25ORD - BFS

2 stops21h 40mMultiple Airlines

Wed 7/506:10BFS - ORD

2 stops30h 32mMultiple Airlines

Deal found 21/4£569

Fri 16/508:37ORD - BHD

2 stops29h 48mMultiple Airlines

Sun 18/507:05BHD - ORD

2 stops34h 31mMultiple Airlines

Deal found 22/4£687

One-way flights from Illinois to Northern Ireland
Search for one-way flight options from Illinois to Northern Ireland. Find affordable one-way fares based on user searches. Data last updated 22 April 2025.

Tue 26/819:25ORD - BFS

2 stops29h 20mMultiple Airlines

Deal found 21/4£238

Mon 18/818:10ORD - BHD

2 stops20h 15mMultiple Airlines

Deal found 22/4£260

Wed 20/816:55ORD - BHD

1 stop13h 00mBritish Airways

Deal found 22/4£297

Fri 15/821:12MDW - BFS

3 stops31h 48mMultiple Airlines

Deal found 21/4£298

Wed 20/813:05MDW - BHD

2 stops21h 50mDelta

Deal found 21/4£324

Fri 15/819:15ORD - BHD

1 stop14h 15mAmerican Airlines

Deal found 21/4£336

Fri 15/812:50MDW - BHD

3 stops22h 30mMultiple Airlines

Deal found 21/4£391

Thu 5/610:05ORD - BHD

2 stops29h 10mVirgin Atlantic

Deal found 21/4£609

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Mon 8/9

22:35-17:30

1 stop12h 55m

Belfast City

Mon 15/9

09:50-11:50

1 stop32h 00m

£497

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Mon 8/9

21:15-15:40

1 stop12h 25m

Belfast City

Mon 15/9

19:30-14:50

1 stop25h 20m

£498

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Mon 8/9

18:25-17:30

2 stops17h 05m

Belfast City

Mon 15/9

19:30-16:07

2 stops50h 37m

£505

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Thu 21/8

20:35-15:30

1 stop12h 55m

Belfast City

Thu 4/9

06:35-15:45

2 stops15h 10m

£538

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Wed 4/6

08:50-18:35

2 stops27h 45m

Belfast Intl

Wed 11/6

17:20-15:25

2 stops28h 05m

£559

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Mon 11/8

16:52-15:40

2 stops16h 48m

Belfast City

Sun 17/8

20:05-20:13

2 stops30h 08m

£647

ChicagoBelfast

MDW - BFS

MDWBFS

Chicago Midway

Thu 5/6

12:48-19:40

2 stops24h 52m

Belfast Intl

Thu 12/6

08:10-21:45

2 stops19h 35m

£745

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Thu 5/6

16:20-21:15

1 stop22h 55m

Belfast City

Thu 12/6

06:30-14:10

1 stop13h 40m

£746

ChicagoBelfast

MDW - BHD

MDWBHD

Chicago Midway

Mon 8/9

18:50-21:15

2 stops20h 25m

Belfast City

Mon 15/9

06:30-18:36

2 stops18h 06m

£775

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Fri 6/6

13:30-16:55

2 stops21h 25m

Belfast City

Fri 13/6

06:30-14:10

1 stop13h 40m

£788

Flights are sorted by cheapest return flights first.

Deals found on 21/4

Showing 1-10 of 21 results

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 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 Illinois to Northern Ireland

Rainfall in Northern Ireland by month

In terms of precipitation, rainfall in Northern Ireland ranges from 50.0 - 90.0 inches per month. October is typically the wettest month, when rainfall can reach 90.0 mm. April is typically the driest time to visit Northern Ireland when rainfall is around 50.0 mm.

Temperature in Northern Ireland by month

If weather is an important factor for your trip to Northern Ireland, 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 16.0 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 Northern Ireland

To help decide which airline to fly from Illinois to Northern Ireland, see what other customers have to say about Delta, KLM and Virgin Atlantic. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

Delta

8.0

Very Good

7,920 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Delta

8.0

Very Good

7,920 reviews

Delta

8.0

Very Good

7,920 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

KLM

7.8

Good

1,331 reviews

Delta

8.0

Very Good

7,920 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Virgin Atlantic

7.4

Good

642 reviews

Delta

8.0

Very Good

7,920 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

American Airlines

7.2

Good

10,000 reviews

Delta

8.0

Very Good

7,920 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Aer Lingus

7.0

Good

1,067 reviews

Delta

8.0

Very Good

7,920 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Related info for your journey

What are the cheapest airlines to fly from Illinois to Northern Ireland one-way?
To fly one-way, consider booking your trip with British Airways, which is currently one of the cheapest options available, starting at £297. Delta flights start at £324 while deals on American Airlines start at £336 one-way.
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 holiday 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, January is the cheapest month in which you can book a flight from Illinois to Northern Ireland (average of £67). Flying from Illinois to Northern Ireland in July is currently the most expensive (average of £90). 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

Alternative routes for Illinois to Northern Ireland

John F Kennedy Intl to Heathrow flights

Newark to Heathrow flights

John F Kennedy Intl to Gatwick flights

Dulles Intl to Heathrow flights

Newark to Gatwick flights

John F Kennedy Intl to London City flights

Los Angeles to Heathrow flights

Boston to Heathrow flights

LaGuardia to Heathrow flights

O'Hare Intl to Heathrow flights

Baltimore to Heathrow flights

San Francisco to Heathrow flights

Seattle to Heathrow flights

Dallas/Fort Worth to Heathrow flights

Newark to London City flights

LaGuardia to Gatwick flights

Atlanta to Heathrow flights

John F Kennedy Intl to Stansted flights

Boston to Gatwick flights

Miami to Heathrow flights

Dulles Intl to Gatwick flights

Orlando to Heathrow flights

Denver to Heathrow flights

Reagan-National to Heathrow flights

Stewart to Stansted flights

Hobby to Heathrow flights

Dulles Intl to London City flights

Baltimore to Gatwick flights

Newark to Stansted flights

O'Hare Intl to Gatwick flights

Boston to London City flights

John F Kennedy Intl to Edinburgh flights

Los Angeles to London City flights

Reagan-National to Gatwick flights

O'Hare Intl to London City flights

Philadelphia to Heathrow flights

San Francisco to Gatwick flights

Newark to Edinburgh flights

Seattle to Gatwick flights

Sky Harbor Intl to Heathrow flights

San Francisco to London City flights

Minneapolis to Heathrow flights

Orlando to Gatwick flights

Portland to Heathrow flights

George Bush Intcntl to Heathrow flights

Tampa to Heathrow flights

Los Angeles to Gatwick flights

Dallas/Fort Worth to Gatwick flights

Baltimore to Stansted flights

Direct flights to United Kingdom

Fly with Cheapflights

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

Cheapflights helps you search for flights from Illinois to Northern Ireland via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

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

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Northern Ireland from Illinois.

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

Yes, we can. To see specific flights from Illinois to Northern Ireland with no change fees, users can toggle flexible booking options after using the search form above to find flights.

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

Of course! You can now track prices for flights from Illinois to Northern Ireland and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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.

Cheap flights from Illinois to Northern Ireland from £238

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 26/8. Fares are subject to change and may not be available on all flights or dates of travel.

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 22 April 2025.

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Illinois to Northern Ireland

Cheapest flights from Illinois to Northern IrelandExplore 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 22 April 2025.

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 22 April 2025.

Cheapflights Fare Finder

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

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.

Cheapflights Insights

Everything you need to know about your flight from Illinois to Northern Ireland

Rainfall in Northern Ireland by month

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

Temperature in Northern Ireland by month

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

Reviews of airlines servicing Northern Ireland

To help decide which airline to fly from Illinois to Northern Ireland, see what other customers have to say about Delta, KLM and Virgin Atlantic. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

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.

What are the cheapest airlines to fly from Illinois to Northern Ireland one-way?

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

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

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

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

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 Illinois to Northern Ireland

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

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 Illinois to Northern Ireland?

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

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

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

100% Free

Book with Flexibility

Travel Smart

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 22 April 2025.