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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 15/12. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags
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Find the cheapest flights from Illinois to Northern Ireland

Cheap return flights

Enter your travel dates to find the best prices.
British Airways Logo
18:44 - 14:15STL-BHD
13h 31m2 stops
British Airways Logo
06:35 - 18:16BHD-STL
17h 41m2 stops
£471British Airways
Find Deal
Mon, 12 Jan - Tue, 20 Jan
British Airways Logo
18:44 - 14:15STL-BHD
13h 31m2 stops
British Airways Logo
06:35 - 18:16BHD-STL
17h 41m2 stops
£472British Airways
Find Deal
Mon, 12 Jan - Tue, 20 Jan
American Airlines Logo
14:36 - 10:40ORD-BHD
15h 04m2 stops
American Airlines Logo
06:35 - 16:25BHD-ORD
14h 50m1 stop
£488American Airlines
Find Deal
Mon, 9 Mar - Wed, 18 Mar
Delta Logo
13:00 - 16:50MDW-BHD
22h 50m2 stops
Delta Logo
06:30 - 18:34BHD-MDW
17h 04m2 stops
£513Delta
Find Deal
Mon, 9 Mar - Wed, 18 Mar
American Airlines Logo
20:35 - 20:15ORD-BHD
17h 40m1 stop
American Airlines Logo
09:10 - 15:25BHD-ORD
12h 15m1 stop
£523American Airlines
Find Deal
Sun, 7 Dec - Sun, 14 Dec
Virgin Atlantic Logo
16:25 - 21:00ORD-BHD
22h 35m1 stop
Virgin Atlantic Logo
06:30 - 14:20BHD-ORD
13h 50m1 stop
£539Virgin Atlantic
Find Deal
Wed, 3 Dec - Sun, 7 Dec
Virgin Atlantic Logo
16:25 - 21:00ORD-BHD
22h 35m1 stop
Virgin Atlantic Logo
17:20 - 14:20BHD-ORD
27h 00m1 stop
£539Virgin Atlantic
Find Deal
Wed, 3 Dec - Sun, 7 Dec
Delta Logo
16:25 - 16:50ORD-BHD
18h 25m1 stop
Delta Logo
06:30 - 21:56BHD-ORD
21h 26m2 stops
£547Delta
Find Deal
Wed, 3 Dec - Sun, 7 Dec
Aer Lingus Logo
19:40 - 18:25ORD-BHD
16h 45m2 stops
Aer Lingus Logo
06:50 - 17:55BHD-ORD
17h 05m2 stops
£551Aer Lingus
Find Deal
Wed, 10 Dec - Wed, 17 Dec
Aer Lingus Logo
19:40 - 14:05ORD-BHD
12h 25m2 stops
Aer Lingus Logo
18:00 - 14:00BHD-ORD
26h 00m2 stops
£680Aer Lingus
Find Deal
Sun, 7 Dec - Sun, 21 Dec

British Airways flights from Illinois to Northern Ireland

Our best British Airways deals on Illinois to Northern Ireland flight tickets
British Airways
12 Jan
STL18:44Lambert-St Louis
13h 31m
2 stops
BHD14:15Belfast City
20 Jan
BHD06:35Belfast City
17h 41m
2 stops
STL18:16Lambert-St Louis
£471
Find similar
British Airways
12 Jan
STL18:44Lambert-St Louis
13h 31m
2 stops
BHD14:15Belfast City
20 Jan
BHD06:35Belfast City
17h 41m
2 stops
STL18:16Lambert-St Louis
£472
Find similar
British Airways
12 Jan
STL18:44Lambert-St Louis
15h 21m
2 stops
BHD16:05Belfast City
20 Jan
BHD06:35Belfast City
17h 41m
2 stops
STL18:16Lambert-St Louis
£472
Find similar

American Airlines flights from Illinois to Northern Ireland

Our best American Airlines deals on Illinois to Northern Ireland flight tickets
American Airlines
9 Mar
ORD14:36Chicago O'Hare Intl
15h 04m
2 stops
BHD10:40Belfast City
18 Mar
BHD06:35Belfast City
14h 50m
1 stop
ORD16:25Chicago O'Hare Intl
£488
Find similar
American Airlines
7 Dec
ORD20:35Chicago O'Hare Intl
17h 40m
1 stop
BHD20:15Belfast City
14 Dec
BHD09:10Belfast City
12h 15m
1 stop
ORD15:25Chicago O'Hare Intl
£523
Find similar
American Airlines
7 Dec
ORD18:35Chicago O'Hare Intl
19h 40m
1 stop
BHD20:15Belfast City
14 Dec
BHD06:30Belfast City
17h 09m
2 stops
ORD17:39Chicago O'Hare Intl
£530
Find similar

momondo Fare Finder

 
Customise 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 279,928 searches. Data last updated 10 November 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

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Mon 12/1

18:44-14:15

2 stops13h 31m

Belfast City

Tue 20/1

06:35-18:16

2 stops17h 41m

£471

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Mon 12/1

18:44-14:15

2 stops13h 31m

Belfast City

Tue 20/1

06:35-18:16

2 stops17h 41m

£472

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Mon 9/3

14:36-10:40

2 stops15h 04m

Belfast City

Wed 18/3

06:35-16:25

1 stop14h 50m

£488

ChicagoBelfast

MDW - BHD

MDWBHD

Chicago Midway

Mon 9/3

13:00-16:50

2 stops22h 50m

Belfast City

Wed 18/3

06:30-18:34

2 stops17h 04m

£513

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Sun 7/12

20:35-20:15

1 stop17h 40m

Belfast City

Sun 14/12

09:10-15:25

1 stop12h 15m

£523

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Wed 3/12

16:25-21:00

1 stop22h 35m

Belfast City

Sun 7/12

06:30-14:20

1 stop13h 50m

£539

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Wed 3/12

16:25-21:00

1 stop22h 35m

Belfast City

Sun 7/12

17:20-14:20

1 stop27h 00m

£539

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Wed 3/12

16:25-16:50

1 stop18h 25m

Belfast City

Sun 7/12

06:30-21:56

2 stops21h 26m

£547

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Wed 10/12

19:40-18:25

2 stops16h 45m

Belfast City

Wed 17/12

06:50-17:55

2 stops17h 05m

£551

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Sun 7/12

19:40-14:05

2 stops12h 25m

Belfast City

Sun 21/12

18:00-14:00

2 stops26h 00m

£680

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
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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 airline that flies from Illinois to Northern Ireland?

Aer Lingus, British Airways, and KLM are the most popular carriers operating from Illinois to Northern Ireland

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

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, 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 required for your trip to Northern Ireland can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Northern Ireland. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Why use momondo?

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

It is quick and easy to find Illinois to Northern Ireland flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Northern Ireland that suits you.

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

momondo does allow users to show only those flights to Northern Ireland from Illinois which offer a flexible booking policy as well as other useful filters and features.

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

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Illinois to Northern Ireland.

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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