Latest deals
Insights
FAQs
Reviews
Price Alerts

Cheap flights from Illinois to Northern Ireland from $402

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 12/15. 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

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Find the cheapest flights from Illinois to Northern Ireland

Cheap round-trip flights

Enter your travel dates to find the best prices.
British Airways Logo
6:44 pm - 2:15 pmSTL-BHD
13h 31m2 stops
British Airways Logo
6:35 am - 6:16 pmBHD-STL
17h 41m2 stops
$620British Airways
Find Deal
Mon, Jan 12 - Tue, Jan 20
British Airways Logo
6:44 pm - 2:15 pmSTL-BHD
13h 31m2 stops
British Airways Logo
6:35 am - 6:16 pmBHD-STL
17h 41m2 stops
$621British Airways
Find Deal
Mon, Jan 12 - Tue, Jan 20
American Airlines Logo
2:36 pm - 10:40 amORD-BHD
15h 04m2 stops
American Airlines Logo
6:35 am - 4:25 pmBHD-ORD
14h 50m1 stop
$643American Airlines
Find Deal
Mon, Mar 9 - Wed, Mar 18
Delta Logo
1:00 pm - 4:50 pmMDW-BHD
22h 50m2 stops
Delta Logo
6:30 am - 6:34 pmBHD-MDW
17h 04m2 stops
$676Delta
Find Deal
Mon, Mar 9 - Wed, Mar 18
American Airlines Logo
8:35 pm - 8:15 pmORD-BHD
17h 40m1 stop
American Airlines Logo
9:10 am - 3:25 pmBHD-ORD
12h 15m1 stop
$688American Airlines
Find Deal
Sun, Dec 7 - Sun, Dec 14
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
$709Virgin Atlantic
Find Deal
Wed, Dec 3 - Sun, Dec 7
Delta Logo
4:25 pm - 4:50 pmORD-BHD
18h 25m1 stop
Delta Logo
6:30 am - 2:20 pmBHD-ORD
13h 50m1 stop
$710Delta
Find Deal
Wed, Dec 3 - Sun, Dec 7
Virgin Atlantic Logo
10:10 am - 9:20 pmORD-BHD
29h 10m2 stops
Virgin Atlantic Logo
6:30 am - 2:20 pmBHD-ORD
13h 50m1 stop
$738Virgin Atlantic
Find Deal
Fri, Apr 3 - Tue, Apr 7
Multiple Airlines Logo
4:50 pm - 4:45 pmORD-BHD
18h 55m2 stops
Multiple Airlines Logo
7:25 am - 10:43 pmBHD-ORD
44h 18m3 stops
$821Multiple Airlines
Find Deal
Mon, Mar 9 - Wed, Mar 18
Multiple Airlines Logo
7:25 pm - 9:00 pmORD-BFS
19h 35m2 stops
Multiple Airlines Logo
9:15 am - 4:00 pmBFS-ORD
36h 45m3 stops
$821Multiple Airlines
Find Deal
Fri, May 1 - Tue, May 5

British Airways flights from Illinois to Northern Ireland

Our best British Airways deals on Illinois to Northern Ireland flight tickets
British Airways
Jan 12
STL6:44 pmLambert-St Louis
13h 31m
2 stops
BHD2:15 pmBelfast City
Jan 20
BHD6:35 amBelfast City
17h 41m
2 stops
STL6:16 pmLambert-St Louis
$620
Find similar
British Airways
Jan 12
STL6:44 pmLambert-St Louis
13h 31m
2 stops
BHD2:15 pmBelfast City
Jan 20
BHD6:35 amBelfast City
17h 41m
2 stops
STL6:16 pmLambert-St Louis
$621
Find similar
British Airways
Jan 12
STL6:44 pmLambert-St Louis
15h 21m
2 stops
BHD4:05 pmBelfast City
Jan 20
BHD6:35 amBelfast City
17h 41m
2 stops
STL6:16 pmLambert-St Louis
$622
Find similar

American Airlines flights from Illinois to Northern Ireland

Our best American Airlines deals on Illinois to Northern Ireland flight tickets
American Airlines
Mar 9
ORD2:36 pmChicago O'Hare Intl
15h 04m
2 stops
BHD10:40 amBelfast City
Mar 18
BHD6:35 amBelfast City
14h 50m
1 stop
ORD4:25 pmChicago O'Hare Intl
$643
Find similar
American Airlines
Dec 7
ORD8:35 pmChicago O'Hare Intl
17h 40m
1 stop
BHD8:15 pmBelfast City
Dec 14
BHD9:10 amBelfast City
12h 15m
1 stop
ORD3:25 pmChicago O'Hare Intl
$688
Find similar
American Airlines
Dec 7
ORD6:35 pmChicago O'Hare Intl
19h 40m
1 stop
BHD8:15 pmBelfast City
Dec 14
BHD6:30 amBelfast City
17h 09m
2 stops
ORD5:39 pmChicago O'Hare Intl
$698
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 November 10, 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 1/12

6:44 pm-2:15 pm

2 stops13h 31m

Belfast City

Tue 1/20

6:35 am-6:16 pm

2 stops17h 41m

$620

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Mon 1/12

6:44 pm-2:15 pm

2 stops13h 31m

Belfast City

Tue 1/20

6:35 am-6:16 pm

2 stops17h 41m

$621

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Mon 3/9

2:36 pm-10:40 am

2 stops15h 04m

Belfast City

Wed 3/18

6:35 am-4:25 pm

1 stop14h 50m

$643

ChicagoBelfast

MDW - BHD

MDWBHD

Chicago Midway

Mon 3/9

1:00 pm-4:50 pm

2 stops22h 50m

Belfast City

Wed 3/18

6:30 am-6:34 pm

2 stops17h 04m

$676

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Sun 12/7

8:35 pm-8:15 pm

1 stop17h 40m

Belfast City

Sun 12/14

9:10 am-3:25 pm

1 stop12h 15m

$688

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

$709

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Wed 12/3

4:25 pm-4:50 pm

1 stop18h 25m

Belfast City

Sun 12/7

6:30 am-2:20 pm

1 stop13h 50m

$710

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Fri 4/3

10:10 am-9:20 pm

2 stops29h 10m

Belfast City

Tue 4/7

6:30 am-2:20 pm

1 stop13h 50m

$738

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Mon 3/9

4:50 pm-4:45 pm

2 stops18h 55m

Belfast City

Wed 3/18

7:25 am-10:43 pm

3 stops44h 18m

$821

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Fri 5/1

7:25 pm-9:00 pm

2 stops19h 35m

Belfast Intl

Tue 5/5

9:15 am-4:00 pm

3 stops36h 45m

$821

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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
7,508 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

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Wed 12/10
Wed 12/17
By creating a price alert you accept our terms of use and privacy policy.

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
Flights to Londonfrom $14
Flights to Manchesterfrom $344
Flights to Edinburghfrom $409
Flights to Glasgowfrom $400
Flights to Birminghamfrom $412
Flights to Newcastle upon Tynefrom $435
Flights to Belfastfrom $495
Flights to Bristolfrom $436
Flights to Invernessfrom $420
Flights to Liverpoolfrom $437
Flights to Aberdeenfrom $498
Flights to Leedsfrom $432