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Cheap flights from Illinois to Belfast from £237

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 28/4. 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
11:25 - 23:20
ORD
-
BFS
29h 55m
2 stops
Multiple Airlines Logo
08:50 - 09:40
BFS
-
ORD
30h 50m
2 stops
£629Multiple Airlines
Tue, 28 Apr - Tue, 5 May
Multiple Airlines Logo
19:25 - 19:50
ORD
-
BFS
18h 25m
3 stops
Multiple Airlines Logo
07:35 - 16:00
BFS
-
ORD
38h 25m
3 stops
£652Multiple Airlines
Tue, 28 Apr - Tue, 5 May
Multiple Airlines Logo
19:25 - 15:15
ORD
-
BFS
13h 50m
2 stops
Multiple Airlines Logo
07:35 - 16:00
BFS
-
ORD
38h 25m
3 stops
£658Multiple Airlines
Tue, 28 Apr - Tue, 5 May
British Airways Logo
21:15 - 14:35
ORD
-
BHD
11h 20m
1 stop
British Airways Logo
20:25 - 18:15
BHD
-
ORD
27h 50m
1 stop
£664British Airways
Sun, 6 Sep - Tue, 8 Sep
British Airways Logo
21:15 - 14:35
ORD
-
BHD
11h 20m
1 stop
British Airways Logo
20:25 - 15:55
BHD
-
ORD
25h 30m
1 stop
£664British Airways
Sun, 6 Sep - Tue, 8 Sep
American Airlines Logo
13:01 - 10:30
STL
-
BHD
15h 29m
2 stops
American Airlines Logo
11:35 - 23:33
BHD
-
STL
17h 58m
2 stops
£691American Airlines
Sun, 6 Sep - Wed, 16 Sep
Delta Logo
10:55 - 16:55
STL
-
BHD
24h 00m
2 stops
Delta Logo
17:30 - 23:01
BHD
-
STL
35h 31m
2 stops
£707Delta
Tue, 8 Sep - Wed, 16 Sep
KLM Logo
13:30 - 09:20
STL
-
BHD
13h 50m
2 stops
KLM Logo
09:50 - 23:37
BHD
-
STL
19h 47m
2 stops
£729KLM
Sun, 6 Sep - Thu, 17 Sep
Delta Logo
15:42 - 16:55
STL
-
BHD
19h 13m
2 stops
Delta Logo
09:45 - 16:55
BHD
-
STL
37h 10m
2 stops
£749Delta
Tue, 8 Sep - Sun, 13 Sep
KLM Logo
09:22 - 09:20
MDW
-
BHD
17h 58m
2 stops
KLM Logo
17:30 - 18:31
BHD
-
MDW
31h 01m
2 stops
£909KLM
Mon, 1 Jun - Wed, 10 Jun

American Airlines flights from Illinois to Belfast

Our best American Airlines deals on Illinois to Belfast flight tickets
American Airlines
6 Sept
STL13:01Lambert-St Louis
15h 29m
2 stops
BHD10:30Belfast City
16 Sept
BHD11:35Belfast City
17h 58m
2 stops
STL23:33Lambert-St Louis
£691
American Airlines
7 May
ORD22:30Chicago O'Hare Intl
14h 15m
1 stop
BHD18:45Belfast City
10 May
BHD06:30Belfast City
17h 00m
2 stops
ORD17:30Chicago O'Hare Intl
£786
American Airlines
22 Jul
ORD18:10Chicago O'Hare Intl
11h 50m
1 stop
BHD12:00Belfast City
29 Jul
BHD11:35Belfast City
12h 00m
1 stop
ORD17:35Chicago O'Hare Intl
£819

Delta flights from Illinois to Belfast

Our best Delta deals on Illinois to Belfast flight tickets
Delta
8 Sept
STL10:55Lambert-St Louis
24h 00m
2 stops
BHD16:55Belfast City
16 Sept
BHD17:30Belfast City
35h 31m
2 stops
STL23:01Lambert-St Louis
£707
Delta
8 Sept
STL15:42Lambert-St Louis
19h 13m
2 stops
BHD16:55Belfast City
13 Sept
BHD09:45Belfast City
37h 10m
2 stops
STL16:55Lambert-St Louis
£749
Delta
8 Sept
STL16:13Lambert-St Louis
18h 42m
2 stops
BHD16:55Belfast City
14 Sept
BHD17:30Belfast City
29h 19m
2 stops
STL16:49Lambert-St Louis
£813

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 2 April 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

Tue 28/4

11:25-23:20

2 stops29h 55m

Belfast Intl

Tue 5/5

08:50-09:40

2 stops30h 50m

£629

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Tue 28/4

19:25-19:50

3 stops18h 25m

Belfast Intl

Tue 5/5

07:35-16:00

3 stops38h 25m

£652

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Tue 28/4

19:25-15:15

2 stops13h 50m

Belfast Intl

Tue 5/5

07:35-16:00

3 stops38h 25m

£658

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Sun 6/9

21:15-14:35

1 stop11h 20m

Belfast City

Tue 8/9

20:25-18:15

1 stop27h 50m

£664

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Sun 6/9

21:15-14:35

1 stop11h 20m

Belfast City

Tue 8/9

20:25-15:55

1 stop25h 30m

£664
Fastest return journey

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Sun 6/9

13:01-10:30

2 stops15h 29m

Belfast City

Wed 16/9

11:35-23:33

2 stops17h 58m

£691

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Tue 8/9

10:55-16:55

2 stops24h 00m

Belfast City

Wed 16/9

17:30-23:01

2 stops35h 31m

£707

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Sun 6/9

13:30-09:20

2 stops13h 50m

Belfast City

Thu 17/9

09:50-23:37

2 stops19h 47m

£729

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Tue 8/9

15:42-16:55

2 stops19h 13m

Belfast City

Sun 13/9

09:45-16:55

2 stops37h 10m

£749

ChicagoBelfast

MDW - BHD

MDWBHD

Chicago Midway

Mon 1/6

09:22-09:20

2 stops17h 58m

Belfast City

Wed 10/6

17:30-18:31

2 stops31h 01m

£909

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 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?

British Airways, Air France, and Virgin Atlantic 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 00m

Direct flights

None
The fastest flight from Illinois to Belfast takes 11h 00m
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