$263 Find Cheap Flights from Illinois to Northern Ireland

1 adult

KAYAK searches hundreds of travel sites at once for deals on flights to Northern Ireland

Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 22% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Bundle and saveSave money when you bundle your flight + hotel.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Useful Info
Useful Info

Good to know

Low seasonSeptember
High seasonJuly
Cheapest flight$263
Best time to beat the crowds with an average 6% drop in price.
Most popular time to fly and prices are also 17% lower on average.
Flight from Chicago to Belfast Intl Airport

FAQs for booking flights from Illinois to Northern Ireland

  • How does KAYAK find such low prices on flights from Illinois to Northern Ireland?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Illinois to Northern Ireland.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Illinois to Northern Ireland?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Illinois to Northern Ireland is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Illinois to Northern Ireland?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly from Illinois to Northern Ireland with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Illinois to Northern Ireland?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying from Illinois to Northern Ireland up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • What is the cheapest day to fly to Northern Ireland?

    Based on KAYAK data, the cheapest day to fly to Northern Ireland is Sunday where round-trip tickets can be as cheap as $718. On the other hand, the most expensive day to fly is Thursday, where round-trip prices are $853 on average.

  • What is the cheapest time of day to fly to Northern Ireland?

    The cheapest time of day to fly to Northern Ireland is generally at night, when round-trip flights cost $751 on average. Morning departures are around 100% cheaper than evening flights, on average. The most expensive time of day to fly to Northern Ireland is generally in the evening, which is peak travel time and where the average cost of a ticket is $782.

  • How long is the flight to Northern Ireland?

    An average nonstop flight from Illinois to Northern Ireland takes 17h 26m, covering a distance of 3721 miles. The shortest route is Chicago O'Hare Intl Airport (ORD) to Belfast Intl Airport (BFS) with an average flight time of 11h 15m.

  • What is the most popular destination in Northern Ireland?

    Based on KAYAK flight searches, the most popular destination is Belfast (100% of total searches to Northern Ireland).

Top airlines flying from Illinois to Northern Ireland

Need help choosing which airline to fly with from Illinois to Northern Ireland? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.2
American AirlinesOverall score based on 10000 reviews
8.0Crew
7.5Boarding
6.9Entertainment
6.5Food
7.2Comfort
Airline reviews

I have long legs, my foot was out in the aisle and when a flight attendant came walking by and I didn't notice, instead of saying "excuse me" or anything like that, she kicked my foot. Extremely rude

6.0 GoodAnonymous, Mar 2025ORD - CLT
Read more American Airlines reviews

I have long legs, my foot was out in the aisle and when a flight attendant came walking by and I didn't notice, instead of saying "excuse me" or anything like that, she kicked my foot. Extremely rude

Excellent! The gate agents were kind enough to rebook me on an earlier flight saving me from a 6 hour layover. Even my luggage made it despite the fact that the connection was technically too narrow. The flight itself was very comfortable, roomy, and clean. Plenty of space for my carryon items with plugs to charge my phone. After a long international flight of 14 hours, this was an excellent way to end my travels!

Great experience. Flight boarded easily. Departed early. Smooth flight. Great arrival in DC--almost no taxing! Almost direct to gate from runway. Crew was terrific. Same cookies and beverages in main cabin. I did not use the entertainment system on this flight.

This particular flight wasn't very full at the back, so there were three seats available for spreading out and getting relatively comfortable

Most of the delay was due to weather which is not what was at issue here. One delay was due to a missing flashlight and in the end the flashlight was actually found on the plane. The entertainment system is very limited. Live TV options offer only a few channels that are not very appealing. Boarding and deplaning are always difficult. It just takes too much time to get on and off the plane. On the plus side, I missed my connecting flight, but was easily able to book a later flight from the app while enroute.

You were more on time than United. I'm so over united delays.

The meals were mediocre and the alcohol selection was poor. I enjoyed the selection of movies and other entertainment.

I chatted with the captain before the flight, and similarly during the welcome announcement, he warned of a turbulent flight that may impact the in-flight service. However, once at altitude, he announced that the weather changed and he immediately turned off the seatbelt sign. But it appeared the cabin crew had already decided to take off this flight. They remained seated and then just chatted in the galley. The flight was fully catered, but only first class received service.

My flight attendant was attentive! The elderly person next to me was flatulent and the flight attendant could see that I was in distress and brought me some face masks

My boarding pass wouldn't pull up in the app very easily and had to really dig through my email. That caused a delay in TSA..

Too much long line at the TSA and Security. Prepare for long walk for baggage claim.

The flight from Seattle was delayed, which made me miss my connection to Florence. I was re-booked NINE HOURS LATER!!! That’s basically a vacation day lost. British Airways needs to partner with other airlines when possible to get a more realistic travel time, if delays occur. I realize there aren’t many flights to Florence from London, so I would book differently were I to return. The actual flight from Seattle was very comfortable and the crew was great, no faults there. I enjoy British Airways, this was an anomaly.

The crew could not have been more helpful, my meal was excellent, I slept peacefully until right before landing, and the BA lounge was a godsend. The only negative I encountered was the coffee both on the plane and in the lounge. Not to my taste but that’s a personal preference.

I don’t understand why a reputable airline like BA would delegate their London flights to AA. Makes no sense to me, as most domestic carriers do such a poor job these days. Terminal 3 at LHR is a total dump

The boarding process was quite loud and chaotic. The flight attendants kept barking over the PA system about people needing to only stow large items in the overhead bins. During the one and only service, I was hit by the service cart. At the same time, a passenger was returning from the bathroom and the crew definitely saw him but stopped a few seats short of allowing him to sit down before starting service and made him wait a good 10 minutes before passing his seat and allowing him to sit down, after which he had to ask for his snack and beverage or he would have been passed over. Neither flight attendant thanked passengers as they left; in fact, I did not see them again once the plane door was opened.

Cancelled flight minutes before boarding. Rescheduled flight was two days later

The flight attendants were EXTREMELY personable and appreciated the service, lights going off after dinner (probably the norm, but I haven’t flown evening overnight flights in a while). Thank you!

Business class seats were very dated on my plane. Very little storage, charging ports were not easily accessible, tv screen kept flopping away. Vegetarian food was disappointing: hardly any protein and severely under-seasoned. Crew was lovely.

The food was ok, but not great. They delayed boarding in Portland and did not enforce group boarding. But the crew was excellent, went above and beyond.

The food was pathetic. There wasn't much leg room and recline space for such a long flight. No tea/ coffee for a 2-3 hour connecting flight without purchasing! Really!?

Book cheap flights from Illinois to Northern Ireland

Recent round-trip flight deals

10/8Wed
1 stopIberia
14h 05mORD-BHD
10/15Wed
1 stopIberia
16h 10mBHD-ORD
$587
10/8Wed
1 stopAmerican Airlines
12h 20mORD-BHD
10/16Thu
2 stopsAmerican Airlines
17h 20mBHD-ORD
$597
10/8Wed
2 stopsBritish Airways
14h 30mORD-BHD
10/15Wed
2 stopsBritish Airways
18h 55mBHD-ORD
$602
8/13Wed
1 stopAmerican Airlines
13h 00mORD-BHD
8/24Sun
1 stopAmerican Airlines
13h 15mBHD-ORD
$637
8/21Thu
1 stopBritish Airways
14h 20mORD-BHD
9/4Thu
1 stopBritish Airways
15h 20mBHD-ORD
$640
6/14Sat
3 stops
19h 00mORD-BFS
6/16Mon
2 stops
21h 46mBFS-ORD
$802
6/2Mon
3 stops
31h 40mORD-BFS
6/7Sat
3 stops
34h 07mBFS-ORD
$826
8/13Wed
2 stopsDelta
21h 55mMDW-BHD
8/24Sun
2 stopsDelta
17h 58mBHD-MDW
$1,038
6/14Sat
2 stopsKLM
17h 16mORD-BHD
6/21Sat
2 stopsKLM
17h 16mBHD-ORD
$1,287
6/14Sat
2 stopsKLM
15h 34mMDW-BHD
6/21Sat
2 stopsKLM
18h 11mBHD-MDW
$2,346

Search by stops

Search by airline

Search by price

Recent one-way flight deals

8/26Tue
2 stops
13h 00mORD-BFS
$263
9/6Sat
2 stops
32h 20mORD-BFS
$280
9/6Sat
2 stops
31h 55mORD-BHD
$291
8/26Tue
2 stops
34h 20mORD-BHD
$302
8/20Wed
1 stopAmerican Airlines
12h 20mORD-BHD
$360
5/6Tue
1 stopBritish Airways
15h 00mORD-BHD
$365
5/6Tue
2 stopsBritish Airways
30h 30mORD-BHD
$366
8/20Wed
2 stopsDelta
21h 55mMDW-BHD
$433
9/6Sat
2 stopsKLM
16h 10mMDW-BHD
$483
5/6Tue
2 stopsDelta
22h 07mMDW-BHD
$495

Search by stops

Search by airline

Search by price

Last minute flights from Illinois to Northern Ireland

Last minute flight, train and bus deals

5/5Mon
multi-stopBritish Airways
11h 15mORD-BHD
5/13Tue
multi-stopBritish Airways
13h 15mBHD-ORD
$597
5/5Mon
multi-stopAmerican Airlines
15h 00mORD-BHD
5/13Tue
multi-stopAmerican Airlines
17h 40mBHD-ORD
$598
5/5Mon
multi-stopBritish Airways
13h 10mORD-BHD
5/13Tue
multi-stopBritish Airways
16h 54mBHD-ORD
$607
5/5Mon
multi-stopAmerican Airlines
13h 10mORD-BHD
5/13Tue
multi-stopAmerican Airlines
16h 59mBHD-ORD
$608
5/5Mon
multi-stopAmerican Airlines
15h 10mORD-BHD
5/13Tue
multi-stopAmerican Airlines
25h 20mBHD-ORD
$634
5/5Mon
multi-stopAmerican Airlines
15h 00mORD-BHD
5/13Tue
multi-stopAmerican Airlines
16h 59mBHD-ORD
$644
5/6Tue
multi-stopDelta
22h 00mORD-BHD
5/13Tue
multi-stopDelta
16h 59mBHD-ORD
$726
5/5Mon
multi-stopDelta
21h 00mORD-BHD
5/13Tue
multi-stopDelta
21h 01mBHD-ORD
$961
5/5Mon
multi-stopDelta
23h 00mORD-BHD
5/13Tue
multi-stopDelta
21h 00mBHD-ORD
$1,042

Search by stops

Search by airline

Search by price

Everything you need to know for your flight to Northern Ireland

Cabin class types available on flights to Illinois

Cabin classes available on flights to Illinois. Prices are the lowest found on KAYAK over the last 7 days. Price and availability is not guaranteed.

Not what you’re looking for? Find thousands of other hotels, flights, car rentals and package deals with KAYAK.