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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 - 23:20
ORD
-
BFS
21h 55m
3 stops
Multiple Airlines Logo
10:50 - 21:20
BFS
-
ORD
40h 30m
3 stops
£577Multiple Airlines
Mon, 17 Aug - Wed, 9 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
British Airways Logo
21:15 - 15:30
ORD
-
BHD
12h 15m
1 stop
British Airways Logo
19:40 - 13:50
BHD
-
ORD
24h 10m
1 stop
£679British Airways
Mon, 3 Aug - Wed, 19 Aug
British Airways Logo
19:05 - 12:55
ORD
-
BHD
11h 50m
1 stop
British Airways Logo
11:35 - 18:15
BHD
-
ORD
12h 40m
1 stop
£685British Airways
Mon, 17 Aug - Wed, 9 Sep
KLM Logo
13:25 - 09:20
MDW
-
BHD
13h 55m
2 stops
KLM Logo
09:50 - 22:45
BHD
-
MDW
18h 55m
2 stops
£724KLM
Mon, 17 Aug - Wed, 9 Sep
Delta Logo
17:10 - 16:55
MDW
-
BHD
17h 45m
2 stops
Delta Logo
09:50 - 22:36
BHD
-
MDW
18h 46m
2 stops
£762Delta
Fri, 14 Aug - Fri, 21 Aug
KLM Logo
18:42 - 16:55
MDW
-
BHD
16h 13m
2 stops
KLM Logo
09:50 - 22:36
BHD
-
MDW
18h 46m
2 stops
£811KLM
Thu, 20 Aug - Tue, 25 Aug
Delta Logo
18:42 - 16:55
MDW
-
BHD
16h 13m
2 stops
Delta Logo
09:50 - 22:36
BHD
-
MDW
18h 46m
2 stops
£1,383Delta
Mon, 3 Aug - Wed, 19 Aug

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Aer Lingus flights from Illinois to Belfast

Our best Aer Lingus deals on Illinois to Belfast flight tickets
Aer Lingus
19 Jul
ORD15:45Chicago O'Hare Intl
16h 25m
2 stops
BHD14:10Belfast City
25 Jul
BHD10:25Belfast City
31h 05m
2 stops
ORD11:30Chicago O'Hare Intl
£1,019
Aer Lingus
19 Jul
ORD21:00Chicago O'Hare Intl
15h 35m
2 stops
BHD18:35Belfast City
25 Jul
BHD19:05Belfast City
24h 55m
2 stops
ORD14:00Chicago O'Hare Intl
£1,080
Aer Lingus
19 Jul
ORD15:45Chicago O'Hare Intl
15h 15m
2 stops
BHD13:00Belfast City
25 Jul
BHD19:05Belfast City
24h 55m
2 stops
ORD14:00Chicago O'Hare Intl
£1,081

British Airways flights from Illinois to Belfast

Our best British Airways deals on Illinois to Belfast flight tickets
British Airways
3 Aug
ORD21:15Chicago O'Hare Intl
12h 15m
1 stop
BHD15:30Belfast City
19 Aug
BHD19:40Belfast City
24h 10m
1 stop
ORD13:50Chicago O'Hare Intl
£679
British Airways
16 Sept
ORD17:00Chicago O'Hare Intl
13h 00m
1 stop
BHD12:00Belfast City
22 Sept
BHD06:30Belfast City
13h 20m
1 stop
ORD13:50Chicago O'Hare Intl
£686
British Airways
6 Sept
ORD21:15Chicago O'Hare Intl
11h 20m
1 stop
BHD14:35Belfast City
14 Sept
BHD19:35Belfast City
26h 20m
1 stop
ORD15:55Chicago O'Hare Intl
£698

momondo Fare Finder

 
Customise your flight search to find flights from Illinois to Belfast 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 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

Mon 17/8

19:25-23:20

3 stops21h 55m

Belfast Intl

Wed 9/9

10:50-21:20

3 stops40h 30m

£577

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 - BHD

ORDBHD

Chicago O'Hare Intl

Mon 3/8

21:15-15:30

1 stop12h 15m

Belfast City

Wed 19/8

19:40-13:50

1 stop24h 10m

£679
Fastest return journey

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Mon 17/8

19:05-12:55

1 stop11h 50m

Belfast City

Wed 9/9

11:35-18:15

1 stop12h 40m

£685

ChicagoBelfast

MDW - BHD

MDWBHD

Chicago Midway

Mon 17/8

13:25-09:20

2 stops13h 55m

Belfast City

Wed 9/9

09:50-22:45

2 stops18h 55m

£724

ChicagoBelfast

MDW - BHD

MDWBHD

Chicago Midway

Fri 14/8

17:10-16:55

2 stops17h 45m

Belfast City

Fri 21/8

09:50-22:36

2 stops18h 46m

£762

ChicagoBelfast

MDW - BHD

MDWBHD

Chicago Midway

Thu 20/8

18:42-16:55

2 stops16h 13m

Belfast City

Tue 25/8

09:50-22:36

2 stops18h 46m

£811

ChicagoBelfast

MDW - BHD

MDWBHD

Chicago Midway

Mon 3/8

18:42-16:55

2 stops16h 13m

Belfast City

Wed 19/8

09:50-22:36

2 stops18h 46m

£1,383

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 Belfast from

How to get the cheapest flight ticket from Illinois to Belfast

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 Belfast?

KLM, British Airways, and Delta are the most popular carriers operating from Illinois to Belfast

Cheap Illinois to Belfast flight deals and tips

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

Fastest flight time

11h 10m

Direct flights

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

Frequently asked questions about flying from Illinois to Belfast

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

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

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

    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.

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

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

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. All flights to Belfast from Illinois on momondo can be compared and filtered by various policies on offer, including flexible booking.

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

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 Belfast.

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

Of course. momondo tracks the price of Illinois to Belfast flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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Find better results for your trip to the United Kingdom

Fly into one of these airports located in Belfast

Airports listed have a maximum distance of 12.2 mi from Belfast
Belfast Intl Airport
Belfast City Airport