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Cheap flights from Northern Ireland to Chicago from £274

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Northern Ireland to Chicago departing on 4/10. 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
1 adult, Economy, 0 bags

Find the cheapest flights from Northern Ireland to Chicago

Cheap return flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
06:10 - 20:41BFS  Belfast Intl-ORD Chicago O'Hare Intl
44h 31m3 stops London Gatwick Montreal Pierre Elliott Trudeau Intl Toronto Island
Multiple Airlines Logo
19:25 - 20:55ORD  Chicago O'Hare Intl-BFS Belfast Intl
19h 30m2 stops Reykjavik Keflavik Intl Manchester
£568Multiple Airlines
Mon, 28 Sep - Mon, 5 Oct
Multiple Airlines Logo
06:40 - 18:15BFS  Belfast Intl-ORD Chicago O'Hare Intl
41h 35m3 stops London Stansted Milan Malpensa Reykjavik Keflavik Intl
Multiple Airlines Logo
19:25 - 19:40ORD  Chicago O'Hare Intl-BFS Belfast Intl
18h 15m2 stops Reykjavik Keflavik Intl Glasgow Intl
£594Multiple Airlines
Tue, 29 Sep - Tue, 6 Oct
Multiple Airlines Logo
20:55 - 20:41BFS  Belfast Intl-ORD Chicago O'Hare Intl
29h 46m3 stops London Gatwick Ottawa Toronto Island
Multiple Airlines Logo
14:15 - 20:40ORD  Chicago O'Hare Intl-BFS Belfast Intl
24h 25m2 stops Toronto Pearson Intl Edinburgh Turnhouse
£623Multiple Airlines
Mon, 7 Sep - Mon, 14 Sep
Multiple Airlines Logo
08:00 - 19:15BFS  Belfast Intl-ORD Chicago O'Hare Intl
17h 15m2 stops Edinburgh Turnhouse Dublin
Multiple Airlines Logo
15:45 - 23:05ORD  Chicago O'Hare Intl-BFS Belfast Intl
25h 20m2 stops Dublin Edinburgh Turnhouse
£626Multiple Airlines
Mon, 28 Sep - Mon, 5 Oct
Multiple Airlines Logo
06:10 - 20:41BFS  Belfast Intl-ORD Chicago O'Hare Intl
44h 31m3 stops London Gatwick Montreal Pierre Elliott Trudeau Intl Toronto Island
Multiple Airlines Logo
11:05 - 23:20ORD  Chicago O'Hare Intl-BFS Belfast Intl
30h 15m3 stops Montreal Pierre Elliott Trudeau Intl Barcelona-El Prat London Stansted
£629Multiple Airlines
Mon, 28 Sep - Mon, 5 Oct
Multiple Airlines Logo
20:55 - 20:41BFS  Belfast Intl-ORD Chicago O'Hare Intl
29h 46m3 stops London Gatwick Ottawa Toronto Island
Multiple Airlines Logo
11:05 - 20:40ORD  Chicago O'Hare Intl-BFS Belfast Intl
27h 35m3 stops Montreal Pierre Elliott Trudeau Intl Toronto Pearson Intl Edinburgh Turnhouse
£634Multiple Airlines
Mon, 7 Sep - Mon, 14 Sep
Multiple Airlines Logo
21:10 - 19:48BFS  Belfast Intl-ORD Chicago O'Hare Intl
28h 38m2 stops London Gatwick Toronto Pearson Intl
Multiple Airlines Logo
22:25 - 21:50ORD  Chicago O'Hare Intl-BFS Belfast Intl
17h 25m2 stops Reykjavik Keflavik Intl Glasgow Intl
£637Multiple Airlines
Fri, 25 Sep - Fri, 2 Oct
Multiple Airlines Logo
21:10 - 19:48BFS  Belfast Intl-ORD Chicago O'Hare Intl
28h 38m2 stops London Gatwick Toronto Pearson Intl
Multiple Airlines Logo
22:25 - 21:00ORD  Chicago O'Hare Intl-BFS Belfast Intl
16h 35m3 stops Reykjavik Keflavik Intl Kastrup Copenhagen Manchester
£648Multiple Airlines
Fri, 25 Sep - Fri, 2 Oct
Multiple Airlines Logo
07:00 - 19:15BFS  Belfast Intl-ORD Chicago O'Hare Intl
18h 15m2 stops Birmingham Dublin
Multiple Airlines Logo
21:00 - 23:00ORD  Chicago O'Hare Intl-BFS Belfast Intl
20h 00m2 stops Dublin Birmingham
£651Multiple Airlines
Tue, 29 Sep - Tue, 6 Oct
Multiple Airlines Logo
06:05 - 13:21BFS  Belfast Intl-ORD Chicago O'Hare Intl
37h 16m3 stops London Gatwick Ottawa Toronto Island
Multiple Airlines Logo
22:25 - 21:00ORD  Chicago O'Hare Intl-BFS Belfast Intl
16h 35m3 stops Reykjavik Keflavik Intl Kastrup Copenhagen Manchester
£663Multiple Airlines
Fri, 25 Sep - Fri, 2 Oct

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British Airways flights from Northern Ireland to Chicago

Our best British Airways deals on Northern Ireland to Chicago flight tickets
British Airways
2 Dec
BHD08:40Belfast City
16h 05m
1 stop
ORD18:45Chicago O'Hare Intl
6 Dec
ORD15:21Chicago O'Hare Intl
13h 24m
2 stops
BHD10:45Belfast City
£755
British Airways
2 Dec
BHD06:35Belfast City
18h 10m
1 stop
ORD18:45Chicago O'Hare Intl
6 Dec
ORD17:10Chicago O'Hare Intl
11h 35m
1 stop
BHD10:45Belfast City
£756
British Airways
2 Dec
BHD06:35Belfast City
18h 10m
1 stop
ORD18:45Chicago O'Hare Intl
6 Dec
ORD17:10Chicago O'Hare Intl
11h 35m
1 stop
BHD10:45Belfast City
£756

Virgin Atlantic flights from Northern Ireland to Chicago

Our best Virgin Atlantic deals on Northern Ireland to Chicago flight tickets
Virgin Atlantic
2 Sept
BHD17:30Belfast City
26h 45m
1 stop
ORD14:15Chicago O'Hare Intl
30 Sept
ORD16:50Chicago O'Hare Intl
18h 05m
1 stop
BHD16:55Belfast City
£4,983
Virgin Atlantic
2 Sept
BHD17:30Belfast City
27h 29m
2 stops
ORD14:59Chicago O'Hare Intl
30 Sept
ORD16:50Chicago O'Hare Intl
10h 30m
1 stop
BHD09:20Belfast City
£4,984

momondo Fare Finder

 
Customise your flight search to find flights from Northern Ireland to Chicago 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 15 August 2026.
Use the filters below to find and compare flights from Northern Ireland to Chicago that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

BelfastChicago

BFS Belfast Intl - ORD Chicago O'Hare Intl

BFSORD

Belfast Intl

Mon 28/9

06:10-20:41

3 stops44h 31m

Chicago O'Hare Intl

Mon 5/10

19:25-20:55

2 stops19h 30m

£568

BelfastChicago

BFS Belfast Intl - ORD Chicago O'Hare Intl

BFSORD

Belfast Intl

Tue 29/9

06:40-18:15

3 stops41h 35m

Chicago O'Hare Intl

Tue 6/10

19:25-19:40

2 stops18h 15m

£594

BelfastChicago

BFS Belfast Intl - ORD Chicago O'Hare Intl

BFSORD

Belfast Intl

Mon 7/9

20:55-20:41

3 stops29h 46m

Chicago O'Hare Intl

Mon 14/9

14:15-20:40

2 stops24h 25m

£623

BelfastChicago

BFS Belfast Intl - ORD Chicago O'Hare Intl

BFSORD

Belfast Intl

Mon 28/9

08:00-19:15

2 stops17h 15m

Chicago O'Hare Intl

Mon 5/10

15:45-23:05

2 stops25h 20m

£626

BelfastChicago

BFS Belfast Intl - ORD Chicago O'Hare Intl

BFSORD

Belfast Intl

Mon 28/9

06:10-20:41

3 stops44h 31m

Chicago O'Hare Intl

Mon 5/10

11:05-23:20

3 stops30h 15m

£628

BelfastChicago

BFS Belfast Intl - ORD Chicago O'Hare Intl

BFSORD

Belfast Intl

Mon 7/9

20:55-20:41

3 stops29h 46m

Chicago O'Hare Intl

Mon 14/9

11:05-20:40

3 stops27h 35m

£634

BelfastChicago

BFS Belfast Intl - ORD Chicago O'Hare Intl

BFSORD

Belfast Intl

Fri 25/9

21:10-19:48

2 stops28h 38m

Chicago O'Hare Intl

Fri 2/10

22:25-21:50

2 stops17h 25m

£637

BelfastChicago

BFS Belfast Intl - ORD Chicago O'Hare Intl

BFSORD

Belfast Intl

Fri 25/9

21:10-19:48

2 stops28h 38m

Chicago O'Hare Intl

Fri 2/10

22:25-21:00

3 stops16h 35m

£648
Fastest return journey

BelfastChicago

BFS Belfast Intl - ORD Chicago O'Hare Intl

BFSORD

Belfast Intl

Tue 29/9

07:00-19:15

2 stops18h 15m

Chicago O'Hare Intl

Tue 6/10

21:00-23:00

2 stops20h 00m

£651

BelfastChicago

BFS Belfast Intl - ORD Chicago O'Hare Intl

BFSORD

Belfast Intl

Fri 25/9

06:05-13:21

3 stops37h 16m

Chicago O'Hare Intl

Fri 2/10

22:25-21:00

3 stops16h 35m

£663

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Chicago from

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

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 Northern Ireland to Chicago?

British Airways is the most popular carrier operating from Northern Ireland to Chicago

Cheap Northern Ireland to Chicago flight deals and tips

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

Fastest flight time

12h 15m

Direct flights

None
The fastest flight from Northern Ireland to Chicago takes 12h 15m
There are no direct flights from Northern Ireland to Chicago. There are no popular flight routes from Northern Ireland to Chicago.
Search flight deals

Frequently asked questions about flying from Northern Ireland to Chicago

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

    Prices for flights from Northern Ireland to Chicago are updated daily.

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

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Northern Ireland to Chicago.

  • What documentation or ID do you need to fly to Chicago?

    The required travel and health documents for your Chicago trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Chicago. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Travelling to a place near Chicago?

Book flights to Chicago if you plan to visit one of these locations
Schererville

Why use momondo?

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

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Northern Ireland to Chicago . Millions of users trust and use momondo every year so you are in good hands.

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

Flights from Northern Ireland to Chicago with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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

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 Chicago from Northern Ireland.

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

Yes momondo offers price alerts on flights to Chicago from Northern Ireland. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

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Find better results for your trip to the United States

Fly into one of these airports located in Chicago

Airports listed have a maximum distance of 78.5 mi from Chicago
Chicago Midway Airport
Chicago O'Hare Intl Airport
Chicago Greater Rockford Airport