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Cheap flights from Illinois to Belfast from £231

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 12/9. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — BHD
7 Aug — 14 Aug1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Illinois to Belfast

Enter your travel dates to find the best prices.

Cheapest flights from Illinois to Belfast
Explore the most affordable flight options available from Illinois to Belfast. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 8 July 2026.

Wed 16/914:15
ORD
-
BFS
2 stops20h 50m
Multiple Airlines
Tue 22/908:50
BFS
-
ORD
3 stops42h 30m
Multiple Airlines
Deal found 3/7£552
Tue 6/1019:25
ORD
-
BFS
2 stops18h 15m
Multiple Airlines
Sun 11/1022:10
BFS
-
ORD
3 stops48h 00m
Multiple Airlines
Deal found 5/7£582
Tue 18/822:25
ORD
-
BFS
2 stops17h 50m
Multiple Airlines
Tue 25/821:25
BFS
-
ORD
3 stops45h 15m
Multiple Airlines
Deal found 4/7£594
Wed 19/819:25
ORD
-
BFS
2 stops20h 20m
Multiple Airlines
Wed 26/817:45
BFS
-
ORD
2 stops24h 55m
Multiple Airlines
Deal found 5/7£597
Wed 19/819:25
ORD
-
BHD
3 stops19h 40m
Multiple Airlines
Wed 26/809:20
BHD
-
ORD
3 stops42h 00m
Multiple Airlines
Deal found 5/7£623
Mon 5/1019:05
ORD
-
BHD
1 stop11h 50m
British Airways
Tue 13/1009:40
BHD
-
ORD
1 stop12h 15m
British Airways
Deal found 5/7£647
Sun 15/1121:50
ORD
-
BHD
1 stop14h 50m
British Airways
Thu 19/1107:40
BHD
-
ORD
1 stop17h 05m
British Airways
Deal found 8/7£659
Mon 3/821:15
ORD
-
BHD
1 stop12h 15m
British Airways
Tue 18/820:25
BHD
-
ORD
1 stop25h 30m
British Airways
Deal found 6/7£680
Tue 6/1021:15
ORD
-
BHD
1 stop12h 05m
British Airways
Sun 11/1006:30
BHD
-
ORD
1 stop17h 45m
British Airways
Deal found 5/7£683
Wed 16/917:00
ORD
-
BHD
1 stop13h 00m
British Airways
Tue 22/906:30
BHD
-
ORD
1 stop13h 20m
British Airways
Deal found 3/7£685
Mon 5/1013:19
MDW
-
BHD
2 stops14h 01m
KLM
Tue 13/1009:50
BHD
-
MDW
2 stops18h 35m
KLM
Deal found 5/7£685
Mon 5/1019:25
ORD
-
BHD
2 stops15h 25m
Multiple Airlines
Tue 13/1008:05
BHD
-
ORD
3 stops38h 05m
Multiple Airlines
Deal found 5/7£685

Find flight deals from Illinois to Belfast

Keep the following information in mind while searching for Illinois to Belfast flight deals. Data was last updated 8 July 2026.

Round-trip from

£552

One-way from

£231
16/9-22/9
  • 16/9-22/9
  • 5 total stops
  • 63h 20m total
  • Illinois to Belfast
Search Deals
12/9
  • 12/9
  • 2 total stops
  • 19h 25m total
  • Illinois to Belfast
Search Deals

Cheapflights 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, Cheapflights users made 858,174 searches. Data last updated 8 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

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

Wed 19/8

19:25-22:20

3 stops20h 55m

Belfast Intl

Wed 26/8

17:45-12:40

2 stops24h 55m

£608

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Mon 3/8

22:25-23:10

2 stops18h 45m

Belfast Intl

Tue 18/8

05:55-14:50

3 stops38h 55m

£652

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Fri 21/8

19:25-21:50

2 stops20h 25m

Belfast Intl

Fri 28/8

07:15-18:15

2 stops17h 00m

£655

ChicagoBelfast

MDW - BHD

MDWBHD

Chicago Midway

Mon 5/10

13:19-09:20

2 stops14h 01m

Belfast City

Tue 13/10

09:50-22:25

2 stops18h 35m

£685

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Wed 16/9

16:01-13:35

2 stops15h 34m

Belfast City

Tue 22/9

06:30-15:55

1 stop15h 25m

£703

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Thu 20/8

14:15-15:50

2 stops19h 35m

Belfast City

Tue 25/8

10:15-14:45

3 stops34h 30m

£715

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Wed 19/8

16:30-13:35

2 stops15h 05m

Belfast City

Wed 26/8

06:30-16:58

2 stops16h 28m

£716

ChicagoBelfast

MDW - BHD

MDWBHD

Chicago Midway

Wed 19/8

18:42-16:55

2 stops16h 13m

Belfast City

Wed 26/8

09:50-22:36

2 stops18h 46m

£722
Fastest return journey

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Thu 20/8

12:40-10:10

2 stops15h 30m

Belfast City

Tue 25/8

06:30-15:55

1 stop15h 25m

£741

Flights are sorted by cheapest return flights first.

Deals found on 4/7

Showing 1-10 of 37 resultsSorted by cheapest first
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Best time to book a flight from Illinois to Belfast

Have a flexible travel schedule? Discover the best time to fly to Belfast 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
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. 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?

    For as low as £685, KLM can have you in Belfast from Illinois in 14h 01m. Airlines will cover a distance of 3647 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

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

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

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Illinois to Belfast 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

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How does Cheapflights help users find flights from Illinois to Belfast?

Deals for Illinois to Belfast flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

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

Cheapflights helps you find that perfect flight to Belfast from Illinois by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

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

Need flexible booking options for your flight to Belfast 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 become cheaper?

Yes! Start tracking prices for Illinois to Belfast flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

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