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Cheap flights from Illinois to Belfast City Airport from £238

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/9. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — BHD
21 May — 28 May1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Illinois to Belfast City

Enter your travel dates to find the best prices.

Cheapest flights from Illinois to Belfast City
Explore the most affordable flight options available from Illinois to Belfast City. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 21 April 2026.

Wed 28/1019:50
ORD
-
BHD
1 stop13h 25m
American Airlines
Tue 3/1106:35
BHD
-
ORD
1 stop14h 45m
American Airlines
Deal found 19/4£655
Sun 6/1221:45
ORD
-
BHD
1 stop14h 55m
British Airways
Thu 10/1220:00
BHD
-
ORD
1 stop23h 50m
British Airways
Deal found 19/4£657
Sun 23/821:40
STL
-
BHD
1 stop15h 05m
British Airways
Wed 26/811:35
BHD
-
STL
1 stop13h 55m
British Airways
Deal found 16/4£673
Thu 22/1017:00
ORD
-
BHD
1 stop11h 10m
British Airways
Tue 27/1019:25
BHD
-
ORD
1 stop24h 25m
British Airways
Deal found 16/4£690
Sun 13/921:15
ORD
-
BHD
1 stop14h 25m
American Airlines
Sun 20/906:30
BHD
-
ORD
1 stop17h 05m
American Airlines
Deal found 17/4£692
Tue 4/818:12
STL
-
BHD
2 stops17h 23m
American Airlines
Thu 13/809:35
BHD
-
STL
2 stops19h 48m
American Airlines
Deal found 19/4£695
Sun 13/921:15
ORD
-
BHD
1 stop14h 25m
Multiple Airlines
Sun 20/920:10
BHD
-
ORD
2 stops25h 50m
Multiple Airlines
Deal found 17/4£697
Tue 4/821:35
STL
-
BHD
1 stop14h 00m
British Airways
Thu 13/809:35
BHD
-
STL
2 stops18h 50m
British Airways
Deal found 19/4£716
Sat 12/917:50
ORD
-
BHD
1 stop12h 35m
American Airlines
Sun 20/911:00
BHD
-
ORD
1 stop12h 35m
American Airlines
Deal found 19/4£729
Sun 13/916:40
ORD
-
BHD
2 stops19h 00m
British Airways
Sun 20/920:10
BHD
-
ORD
2 stops27h 10m
British Airways
Deal found 17/4£733
Mon 18/511:45
STL
-
BHD
2 stops19h 10m
British Airways
Wed 27/510:05
BHD
-
STL
1 stop15h 25m
British Airways
Deal found 17/4£755
Fri 4/915:25
STL
-
BHD
2 stops18h 05m
American Airlines
Fri 11/906:30
BHD
-
STL
2 stops18h 28m
American Airlines
Deal found 18/4£775

Find flight deals from Illinois to Belfast City

Keep the following information in mind while searching for Illinois to Belfast City flight deals. Data was last updated 21 April 2026.

Round-trip from

£673

One-way from

£238
British Airways
  • British Airways
  • 23/8-26/8
  • 2 total stops
  • 29h 00m total
  • Illinois to Belfast
Search Deals
British Airways
  • British Airways
  • 8/9
  • 2 total stops
  • 33h 25m total
  • Illinois to Belfast
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Illinois to Belfast City 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, Cheapflights users made 858,174 searches. Data last updated 21 April 2026.
Use the filters below to find and compare flights from Illinois to Belfast City Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight
Fastest return journey

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Sun 23/8

21:40-17:40

1 stop14h 00m

Belfast City

Wed 26/8

11:35-19:30

1 stop13h 55m

£673

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Thu 1/10

22:35-19:25

1 stop14h 50m

Belfast City

Sun 11/10

06:30-17:35

1 stop17h 05m

£729

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Sat 1/8

15:55-08:40

2 stops34h 45m

Belfast City

Tue 11/8

20:25-23:51

2 stops33h 26m

£785

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Fri 4/9

06:06-18:10

2 stops30h 04m

Belfast City

Fri 11/9

06:30-19:30

1 stop19h 00m

£809

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Sat 16/5

09:36-09:20

2 stops17h 44m

Belfast City

Wed 27/5

17:30-14:15

1 stop26h 45m

£842

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Sun 19/7

20:45-17:40

1 stop14h 55m

Belfast City

Sat 25/7

07:05-17:32

2 stops16h 27m

£846

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Tue 4/8

21:35-17:35

1 stop14h 00m

Belfast City

Thu 13/8

20:35-19:30

1 stop28h 55m

£854

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Sun 19/7

19:17-16:55

2 stops15h 38m

Belfast City

Sat 25/7

17:30-14:15

1 stop26h 45m

£858

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Wed 13/5

09:44-09:20

2 stops17h 36m

Belfast City

Wed 27/5

17:30-14:15

1 stop26h 45m

£865

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Wed 13/5

17:00-16:15

1 stop17h 15m

Belfast City

Mon 1/6

19:35-13:50

1 stop24h 15m

£878

Flights are sorted by cheapest return flights first.

Deals found on 17/4

Showing 1-10 of 28 resultsSorted by cheapest first
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Best time to book a flight from Illinois to Belfast City

Have a flexible travel schedule? Discover the best time to fly to Belfast City from Illinois with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Illinois to Belfast City Airport
No data available for this route at this time. Please check back soon.

Related info for your journey

Find useful and relevant information for your journey from Illinois to Belfast City. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Illinois to Belfast City Airport?

    A quick flight from Illinois to Belfast City Airport can take about 14h. British Airways provides one of the quickest options available for as low as £673. The distance from Illinois to Belfast City Airport is about 3893 mi. Both multi-stop and direct flights can be found to your destination and back.

  • What are the most popular routes from Illinois to Belfast City Airport?

    The most popular route from Illinois to Belfast City Airport is Chicago Midway - Belfast City. You may also consider Chicago O'Hare Intl - Belfast City or Lambert-St Louis - Belfast City.

  • Can I find deals for flights from Illinois to Belfast City that include hotel bookings?

    Yes. In addition to deals on Illinois to Belfast City flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Illinois to Belfast City?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Illinois to Belfast City.

  • Can I find deals for business class flights from Illinois to Belfast City?

    Yes. Cheapflights offers flight deals from Illinois to Belfast City by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

Travelling to a place near Belfast City Airport?

Book flights to Belfast City Airport if you plan to visit one of these locations
Bangor
Carrickfergus
Newcastle

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Why should you use Cheapflights to find cheap flight tickets from Illinois to Belfast City?

Cheapflights simply makes it quick and affordable to book flights from Illinois to Belfast City by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

Can Cheapflights find flights from Illinois to Belfast City with no change fees?

Need flexible booking options for your flight to Belfast City from Illinois? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

Can Cheapflights notify me if prices for flights from Illinois to Belfast City become cheaper?

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Belfast City from Illinois today and book when prices fit your budget.

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