HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Illinois

$503+ 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 7/19. Fares are subject to change and may not be available on all flights or dates of travel.
BFS — ORD
Apr 7 — Apr 141
Mon 4/7
Mon 4/14
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Northern Ireland to Illinois with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 2, 2025.

Round-trip from

$777
(Mytrip)

One-way from

$503
(Kiwi.com)

Popular in

March

Cheapest in

September

Average price

$995
From Northern Ireland to Illinois
Search Deals
One-way flight from Northern Ireland to Illinois
Search Deals
Highest demand for flights based on searches. 26% potential increase in price ($342 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 8% potential price decrease ($72 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 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 April 2, 2025.

This Mytrip deal was found by Cheapflights users on 4/1. 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.
Thu 5/19:10 pmBFS - ORD
2 stops33h 21mMultiple Airlines
Mon 5/127:47 amORD - BFS
2 stops30h 38mMultiple Airlines
Deal found 4/1$777
This British Airways deal was found by Cheapflights users on 4/1. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/126:35 amBHD - ORD
1 stop15h 20mBritish Airways
Sat 9/139:15 pmORD - BHD
1 stop14h 00mBritish Airways
Deal found 4/1$1,130
This Virgin Atlantic deal was found by Cheapflights users on 4/1. 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 stop18h 35mVirgin Atlantic
Deal found 4/1$1,142

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 2, 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

Thu 5/1

9:10 pm-12:31 am

2 stops33h 21m

Chicago O'Hare Intl

Mon 5/12

7:47 am-8:25 pm

2 stops30h 38m

$777

BelfastChicago

BHD - ORD

BHDORD

Belfast City

Tue 8/12

6:35 am-1:50 pm

1 stop13h 15m

Chicago O'Hare Intl

Mon 9/8

9:15 pm-3:40 pm

1 stop12h 25m

$1,130

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-4:55 pm

1 stop18h 35m

$1,142

BelfastChicago

BFS - ORD

BFSORD

Belfast Intl

Sat 7/19

5:45 am-5:11 pm

3 stops41h 26m

$503

BelfastChicago

BHD - ORD

BHDORD

Belfast City

Sat 7/19

6:55 am-12:32 am

3 stops23h 37m

$674

BelfastChicago

BHD - ORD

BHDORD

Belfast City

Fri 5/16

10:20 am-7:00 pm

2 stops14h 40m

$964

BelfastChicago

BHD - ORD

BHDORD

Belfast City

Sat 7/19

7:05 am-6:15 pm

1 stop17h 10m

$1,263

BelfastChicago

BHD - ORD

BHDORD

Belfast City

Fri 5/16

6:30 am-2:10 pm

1 stop13h 40m

$1,648

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/1

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 2, 2025.
Delta
8.0
Very good
7,898 reviews

Overall

8.0

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Crew

8.5

Food

7.3

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
7,898 reviews
Delta
8.0
Very good
7,898 reviews

Overall

8.0

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Crew

8.5

Food

7.3

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
637 reviews
Delta
8.0
Very good
7,898 reviews

Overall

8.0

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Crew

8.5

Food

7.3

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
1,060 reviews
Delta
8.0
Very good
7,898 reviews

Overall

8.0

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Crew

8.5

Food

7.3

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
British Airways
6.6
Okay
6,715 reviews
Delta
8.0
Very good
7,898 reviews

Overall

8.0

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Crew

8.5

Food

7.3

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.

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

    For one-way options, check prices for Aer Lingus. According to our data, you can fly for as low as $964. Users have also found prices from $1,263 and $1,648 on British Airways and Delta, respectively.

  • 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

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
London City to John F Kennedy Intl flights
Gatwick to John F Kennedy Intl flights
Heathrow to LaGuardia flights
Gatwick to Newark flights
London City to Newark flights
Heathrow to Miami flights
Heathrow to Los Angeles flights
Heathrow to Orlando flights
Gatwick to LaGuardia flights
Stansted to John F Kennedy Intl flights
Heathrow to Boston flights
Heathrow to San Francisco flights
Heathrow to Dallas/Fort Worth flights
Heathrow to O'Hare Intl flights
Heathrow to Dulles Intl flights
Luton to John F Kennedy Intl flights
Gatwick to Orlando flights
Heathrow to Las Vegas flights
Heathrow to Baltimore flights
Manchester to Orlando flights
Gatwick to Stewart flights
Stansted to Newark flights
London City to Los Angeles flights
Gatwick to Boston flights
Heathrow to Seattle flights
Heathrow to Hobby flights
London City to Miami flights
Heathrow to Atlanta flights
Gatwick to Miami flights
Luton to Newark flights
Manchester to John F Kennedy Intl flights
Luton to Stewart flights
London City to Boston flights
Heathrow to George Bush Intcntl flights
Heathrow to Tampa flights
Heathrow to Denver flights
Stansted to Boston flights
London City to San Francisco flights
Gatwick to San Francisco flights
Gatwick to O'Hare Intl flights
Gatwick to Las Vegas flights
Heathrow to Reagan-National flights
Manchester to Newark flights
Gatwick to Dulles Intl flights
Heathrow to Charlotte flights
London City to O'Hare Intl flights

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.