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Cheap flights from Illinois to Northern Ireland from $305

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Illinois to Northern Ireland departing on 1/9. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Illinois to Northern Ireland

Cheap round-trip flights

Multiple Airlines Logo
8:15 pm - 10:45 pmORD-BFS
20h 30m3 stops
Multiple Airlines Logo
9:05 pm - 2:45 pmBFS-ORD
47h 40m3 stops
$637Multiple Airlines
Find Deal
Fri, Nov 7 - Fri, Nov 14
Multiple Airlines Logo
6:30 pm - 10:20 pmORD-BFS
21h 50m2 stops
Multiple Airlines Logo
6:30 am - 5:20 pmBFS-ORD
16h 50m2 stops
$680Multiple Airlines
Find Deal
Wed, Nov 5 - Wed, Nov 12
Virgin Atlantic Logo
4:25 pm - 9:00 pmORD-BHD
22h 35m1 stop
Virgin Atlantic Logo
6:30 am - 2:20 pmBHD-ORD
13h 50m1 stop
$710Virgin Atlantic
Find Deal
Wed, Dec 3 - Sun, Dec 7
Virgin Atlantic Logo
7:10 am - 9:00 pmORD-BHD
31h 50m2 stops
Virgin Atlantic Logo
5:20 pm - 2:20 pmBHD-ORD
27h 00m1 stop
$715Virgin Atlantic
Find Deal
Wed, Dec 3 - Sun, Dec 7
Delta Logo
3:30 pm - 9:00 pmSTL-BHD
23h 30m2 stops
Delta Logo
6:30 am - 4:50 pmBHD-STL
16h 20m2 stops
$744Delta
Find Deal
Sun, Mar 1 - Thu, Mar 5
Delta Logo
10:30 am - 4:50 pmORD-BHD
25h 20m2 stops
Delta Logo
6:30 am - 2:20 pmBHD-ORD
13h 50m1 stop
$756Delta
Find Deal
Thu, Oct 30 - Sun, Nov 9
British Airways Logo
10:47 am - 10:20 amSTL-BHD
17h 33m2 stops
British Airways Logo
6:00 pm - 8:21 pmBHD-STL
32h 21m2 stops
$759British Airways
Find Deal
Sun, Dec 7 - Sat, Dec 13
KLM Logo
4:15 pm - 9:15 pmORD-BHD
23h 00m1 stop
KLM Logo
6:30 am - 2:10 pmBHD-ORD
13h 40m1 stop
$762KLM
Find Deal
Fri, Oct 3 - Tue, Oct 7
KLM Logo
4:15 pm - 9:15 pmORD-BHD
23h 00m1 stop
KLM Logo
6:30 am - 4:11 pmBHD-ORD
15h 41m2 stops
$772KLM
Find Deal
Fri, Oct 3 - Tue, Oct 7
British Airways Logo
6:10 pm - 6:50 pmORD-BHD
19h 40m1 stop
British Airways Logo
9:10 am - 6:45 pmBHD-ORD
15h 35m1 stop
$800British Airways
Find Deal
Thu, Oct 30 - Sun, Nov 9

Virgin Atlantic flights from Illinois to Northern Ireland

Our best Virgin Atlantic deals on Illinois to Northern Ireland flight tickets
Virgin Atlantic
Dec 3
ORD4:25 pmChicago O'Hare Intl
22h 35m
1 stop
BHD9:00 pmBelfast City
Dec 7
BHD6:30 amBelfast City
13h 50m
1 stop
ORD2:20 pmChicago O'Hare Intl
$710
Find similar
Virgin Atlantic
Dec 3
ORD7:10 amChicago O'Hare Intl
31h 50m
2 stops
BHD9:00 pmBelfast City
Dec 7
BHD5:20 pmBelfast City
27h 00m
1 stop
ORD2:20 pmChicago O'Hare Intl
$715
Find similar
Virgin Atlantic
Oct 17
MDW9:35 amChicago Midway
25h 20m
2 stops
BHD4:55 pmBelfast City
Oct 21
BHD6:30 amBelfast City
17h 55m
2 stops
MDW6:25 pmChicago Midway
$778
Find similar

Delta flights from Illinois to Northern Ireland

Our best Delta deals on Illinois to Northern Ireland flight tickets
Delta
Mar 1
STL3:30 pmLambert-St Louis
23h 30m
2 stops
BHD9:00 pmBelfast City
Mar 5
BHD6:30 amBelfast City
16h 20m
2 stops
STL4:50 pmLambert-St Louis
$744
Find similar
Delta
Oct 30
ORD10:30 amChicago O'Hare Intl
25h 20m
2 stops
BHD4:50 pmBelfast City
Nov 9
BHD6:30 amBelfast City
13h 50m
1 stop
ORD2:20 pmChicago O'Hare Intl
$756
Find similar
Delta
Oct 30
ORD10:30 amChicago O'Hare Intl
25h 20m
2 stops
BHD4:50 pmBelfast City
Nov 9
BHD6:30 amBelfast City
19h 59m
2 stops
ORD8:29 pmChicago O'Hare Intl
$766
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Illinois to Northern Ireland 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, momondo users made 832,500 searches. Data last updated September 23, 2025.
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 - BFS

ORDBFS

Chicago O'Hare Intl

Fri 11/7

8:15 pm-10:45 pm

3 stops20h 30m

Belfast Intl

Fri 11/14

9:05 pm-2:45 pm

3 stops47h 40m

$637

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Wed 11/5

6:30 pm-10:20 pm

2 stops21h 50m

Belfast Intl

Wed 11/12

6:30 am-5:20 pm

2 stops16h 50m

$680

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Wed 12/3

4:25 pm-9:00 pm

1 stop22h 35m

Belfast City

Sun 12/7

6:30 am-2:20 pm

1 stop13h 50m

$710

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Wed 12/3

7:10 am-9:00 pm

2 stops31h 50m

Belfast City

Sun 12/7

5:20 pm-2:20 pm

1 stop27h 00m

$715

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Sun 3/1

3:30 pm-9:00 pm

2 stops23h 30m

Belfast City

Thu 3/5

6:30 am-4:50 pm

2 stops16h 20m

$744

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Thu 10/30

10:30 am-4:50 pm

2 stops25h 20m

Belfast City

Sun 11/9

6:30 am-2:20 pm

1 stop13h 50m

$756

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Sun 12/7

10:47 am-10:20 am

2 stops17h 33m

Belfast City

Sat 12/13

6:00 pm-8:21 pm

2 stops32h 21m

$759

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Fri 10/3

4:15 pm-9:15 pm

1 stop23h 00m

Belfast City

Tue 10/7

6:30 am-2:10 pm

1 stop13h 40m

$762

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Fri 10/3

4:15 pm-9:15 pm

1 stop23h 00m

Belfast City

Tue 10/7

6:30 am-4:11 pm

2 stops15h 41m

$772

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Thu 10/30

6:10 pm-6:50 pm

1 stop19h 40m

Belfast City

Sun 11/9

9:10 am-6:45 pm

1 stop15h 35m

$800

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 15 resultsSorted by cheapest first
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See travel insights to Northern Ireland from

How to get the cheapest flight ticket from Illinois to Northern Ireland

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest day to depart on your flight to Northern Ireland?

The cheapest day to depart on your flight to Northern Ireland is on a Sunday when prices can be found for as low as $718. This is often the case because there is less demand to fly during this day of the week. When flying out on a Thursday, the most expensive travel day of the week, you can expect to see flight prices from Illinois to Northern Ireland for around $853.

What is the cheapest time of day to depart on your flight to Northern Ireland?

In the evening is the cheapest time of day to fly from Illinois to Northern Ireland when you can find flight prices for as low as $751. Flying to Northern Ireland in the evening is an ideal time because this is during off-peak travel hours. Flights in the afternoon are often more expensive with an average ticket price of $782.

Cheap Illinois to Northern Ireland flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Illinois to Northern Ireland

Direct flights

None
There are no direct flights from Illinois to Northern Ireland. There are no popular flight routes from Illinois to Northern Ireland.
Search flight deals

  • When did momondo last update prices for flights from Illinois to Northern Ireland?

    Prices for flights from Illinois to Northern Ireland were last updated today.

  • How many operators does momondo search for flights from Illinois to Northern Ireland?

  • How old do you have to be to fly from Illinois to Northern Ireland?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Illinois to Northern Ireland.

  • What documentation or ID do you need to fly to Northern Ireland?

    The travel and health documents you'll need for your trip to Northern Ireland may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Northern Ireland. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Best airlines flying from Illinois to Northern Ireland

Compare and see reviews for airlines that fly from Illinois to Northern Ireland with momondo
Airline
Rating
Free Cancellation
Price
British AirwaysPriceFrom $577Free CancellationRating
6.7
7,391 reviews
Search British Airways flights

Why use momondo?

Why should I use momondo to find a flight deal from Illinois to Northern Ireland?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Northern Ireland from Illinois.

Can I find flights from Illinois to Northern Ireland with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Illinois to Northern Ireland flights to just show those with flexible booking policies.

How can momondo help me find flights from Illinois to Northern Ireland?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Northern Ireland from Illinois.

I’m not ready to book a flight from Illinois to Northern Ireland right now. Can momondo alert me if prices change?

Price alerts on flights to Northern Ireland from Illinois are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

An easier way to manage your Northern Ireland trip

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Find better results for your trip to Northern Ireland

Popular cities in Northern Ireland

Popular flights according to clicks in the last 7 days on momondo
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Flights to Bristolfrom $461
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Flights to Leedsfrom $445