Cheap flights from Illinois to Belfast from £231

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 Belfast departing on 12/9. 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
1 adult, Economy, 0 bags
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Find the cheapest flights from Illinois to Belfast

Cheap return flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
14:15 - 17:05
ORD
-
BFS
20h 50m
2 stops
Multiple Airlines Logo
08:50 - 21:20
BFS
-
ORD
42h 30m
3 stops
£552Multiple Airlines
Wed, 16 Sep - Tue, 22 Sep
Multiple Airlines Logo
19:25 - 21:50
ORD
-
BFS
20h 25m
2 stops
Multiple Airlines Logo
20:15 - 14:00
BFS
-
ORD
47h 45m
3 stops
£588Multiple Airlines
Sun, 6 Sep - Sat, 12 Sep
Multiple Airlines Logo
22:25 - 22:15
ORD
-
BFS
17h 50m
2 stops
Multiple Airlines Logo
21:25 - 12:40
BFS
-
ORD
45h 15m
3 stops
£594Multiple Airlines
Tue, 18 Aug - Tue, 25 Aug
Multiple Airlines Logo
19:25 - 22:15
ORD
-
BFS
20h 50m
2 stops
Multiple Airlines Logo
05:55 - 16:57
BFS
-
ORD
41h 02m
3 stops
£596Multiple Airlines
Tue, 18 Aug - Tue, 25 Aug
Multiple Airlines Logo
19:25 - 22:15
ORD
-
BFS
20h 50m
2 stops
Multiple Airlines Logo
05:55 - 13:22
BFS
-
ORD
37h 27m
3 stops
£608Multiple Airlines
Tue, 18 Aug - Tue, 25 Aug
Multiple Airlines Logo
19:25 - 22:15
ORD
-
BFS
20h 50m
2 stops
Multiple Airlines Logo
14:50 - 14:00
BFS
-
ORD
29h 10m
2 stops
£612Multiple Airlines
Tue, 18 Aug - Tue, 25 Aug
Multiple Airlines Logo
19:15 - 23:50
ORD
-
BFS
22h 35m
2 stops
Multiple Airlines Logo
14:50 - 16:10
BFS
-
ORD
31h 20m
2 stops
£613Multiple Airlines
Tue, 18 Aug - Tue, 25 Aug
Multiple Airlines Logo
19:25 - 21:20
ORD
-
BFS
19h 55m
3 stops
Multiple Airlines Logo
05:55 - 14:55
BFS
-
ORD
39h 00m
3 stops
£614Multiple Airlines
Tue, 18 Aug - Tue, 25 Aug
Multiple Airlines Logo
19:15 - 23:50
ORD
-
BFS
22h 35m
2 stops
Multiple Airlines Logo
14:50 - 16:10
BFS
-
ORD
31h 20m
2 stops
£614Multiple Airlines
Tue, 18 Aug - Tue, 25 Aug
Multiple Airlines Logo
19:25 - 21:50
ORD
-
BFS
20h 25m
2 stops
Multiple Airlines Logo
21:25 - 19:48
BFS
-
ORD
28h 23m
3 stops
£615Multiple Airlines
Sun, 6 Sep - Mon, 14 Sep

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momondo Fare Finder

 
Customise your flight search to find flights from Illinois to Belfast Intl Airport 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 5 July 2026.
Use the filters below to find and compare flights from Illinois to Belfast Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Wed 16/9

14:15-17:05

2 stops20h 50m

Belfast Intl

Tue 22/9

08:50-21:20

3 stops42h 30m

£552

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Sun 6/9

19:25-21:50

2 stops20h 25m

Belfast Intl

Sat 12/9

20:15-14:00

3 stops47h 45m

£588

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Tue 18/8

22:25-22:15

2 stops17h 50m

Belfast Intl

Tue 25/8

21:25-12:40

3 stops45h 15m

£594

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Tue 18/8

19:25-22:15

2 stops20h 50m

Belfast Intl

Tue 25/8

05:55-16:57

3 stops41h 02m

£596

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Tue 18/8

19:25-22:15

2 stops20h 50m

Belfast Intl

Tue 25/8

05:55-13:22

3 stops37h 27m

£608

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Tue 18/8

19:25-22:15

2 stops20h 50m

Belfast Intl

Tue 25/8

14:50-14:00

2 stops29h 10m

£612

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Tue 18/8

19:15-23:50

2 stops22h 35m

Belfast Intl

Tue 25/8

14:50-16:10

2 stops31h 20m

£613

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Tue 18/8

19:25-21:20

3 stops19h 55m

Belfast Intl

Tue 25/8

05:55-14:55

3 stops39h 00m

£614

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Tue 18/8

19:15-23:50

2 stops22h 35m

Belfast Intl

Tue 25/8

14:50-16:10

2 stops31h 20m

£614
Fastest return journey

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Sun 6/9

19:25-21:50

2 stops20h 25m

Belfast Intl

Mon 14/9

21:25-19:48

3 stops28h 23m

£615

Flights are sorted by cheapest return flights first.

Showing 1-10 of 15 resultsSorted by cheapest first
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Cheap Illinois to Belfast Intl Airport flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Illinois to Belfast Intl Airport

Fastest flight time

11h 10m

Direct flights

None
The fastest flight from Illinois to Belfast Intl Airport takes 11h 10m
There are no direct flights from Illinois to Belfast Intl Airport. There are no popular flight routes from Illinois to Belfast Intl Airport.

Frequently asked questions about flying from Illinois to Belfast Intl Airport

  • When did momondo last update prices for flights from Illinois to Belfast Intl Airport?

    Prices for flights from Illinois to Belfast Intl Airport were last updated today.

  • How old do you have to be to fly from Illinois to Belfast Intl Airport?

    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 Illinois to Belfast Intl Airport.

  • What documentation or ID do you need to fly to Belfast Intl Airport?

    The travel and health documents you'll need for your trip to Belfast Intl Airport 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 Belfast Intl Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Frequently asked questions about flying from Illinois to Belfast Intl Airport

  • How do I get Price Alerts for flights from Illinois to Belfast Intl Airport?

    Confirm your travel details to search for the latest offers for flights from Illinois to Belfast Intl Airport. While browsing offers there will be the option to toggle “Price Alerts”. You’ll then receive updates when prices for the flight route increase or decrease.

  • How can I save money on flights from Illinois to Belfast Intl Airport with momondo?

    With “Price Forecast”, learn how soon you should book your flight in advance. Down to the day of week and time of day, our information can inform you on the ideal time to book to save on your travel. Our “Price Calendar” shows you at a quick glance when to book your travel for lower rates. By setting “Price Alerts” you can monitor changes in price and target the ideal time to book. Search for your trip destination by budget amount via our “Explore” feature. Whether you’re looking for ideas for your next travel adventure or cost-cutting tips, our “Discover” content is a great place to start.

  • How does momondo find its flight prices?

    momondo shows deals across 700+ competitors all at once. momondo is active in 30 international markets, so you can have access to a wide range of options from airlines and OTAs alike.

Travelling to a place near Belfast?

Book flights to Belfast if you plan to visit one of these locations
Ballymena
Newry
Armagh
Cookstown
Portadown
Dungannon

Why use momondo?

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

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Illinois to Belfast. momondo saves you time and could save you money on your trip.

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

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

How can momondo help me find flights from Illinois to Belfast?

momondo helps you find the best flight between Illinois and Belfast by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

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

Yes momondo offers price alerts on flights to Belfast from Illinois. 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.

An easier way to manage your Belfast Intl Airport trip

We make it super easy to schedule, organise and travel with friends or family. Trips is free – and available to use no matter where you book.

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1 adult
Tue 4/8
Tue 11/8

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