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Cheap flights from Illinois to Belfast from £166

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 14/2. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — BHD
8 Feb — 15 Feb1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Illinois to Belfast

Keep the following information in mind while searching for Illinois to Belfast flight deals. Data was last updated 9 January 2026.

Round-trip from

£451

One-way from

£166
British Airways
  • British Airways
  • 27/2-3/3
  • 2 total stops
  • 26h 30m total
  • Illinois to Belfast
Search Deals
14/2
  • 14/2
  • 2 total stops
  • 22h 10m total
  • Illinois to Belfast
Search Deals

Find 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 9 January 2026.

Wed 29/717:34ORD - BHD
2 stops13h 56mBritish Airways
Tue 18/818:15BHD - ORD
1 stop25h 35mBritish Airways
Deal found 7/1£445
Wed 14/117:10ORD - BHD
2 stops15h 15mBritish Airways
Mon 19/117:45BHD - ORD
1 stop26h 05mBritish Airways
Deal found 7/1£449
Fri 27/221:45ORD - BHD
1 stop10h 30mBritish Airways
Tue 3/308:45BHD - ORD
1 stop16h 00mBritish Airways
Deal found 8/1£451
Wed 4/317:10ORD - BHD
1 stop11h 05mBritish Airways
Sun 8/312:10BHD - ORD
1 stop12h 35mBritish Airways
Deal found 6/1£466
Mon 12/111:55STL - BHD
2 stops20h 20mBritish Airways
Tue 20/115:05BHD - STL
2 stops33h 09mBritish Airways
Deal found 6/1£469
Sun 10/521:40STL - BHD
1 stop14h 00mBritish Airways
Sun 17/518:50BHD - STL
2 stops54h 40mBritish Airways
Deal found 7/1£470
Wed 25/211:59STL - BHD
2 stops16h 16mBritish Airways
Sun 1/306:30BHD - STL
2 stops20h 42mBritish Airways
Deal found 6/1£477
Wed 18/315:39ORD - BHD
2 stops17h 36mBritish Airways
Sun 22/318:50BHD - ORD
2 stops25h 10mBritish Airways
Deal found 8/1£478
Fri 11/909:40ORD - BHD
2 stops17h 10mBritish Airways
Wed 16/920:15BHD - ORD
1 stop23h 35mBritish Airways
Deal found 8/1£479
Mon 12/113:28MDW - BHD
2 stops21h 22mDelta
Mon 19/117:20BHD - MDW
2 stops30h 35mDelta
Deal found 7/1£515
Sun 11/109:32MDW - BHD
2 stops25h 18mDelta
Mon 19/117:20BHD - MDW
2 stops30h 35mDelta
Deal found 7/1£570
Sun 11/109:32MDW - BHD
2 stops25h 18mDelta
Sat 17/117:20BHD - MDW
2 stops31h 12mDelta
Deal found 7/1£608

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 9 January 2026.
Use the filters below to find and compare flights from Illinois to Belfast that are best for you.

Fly from

Illinois

Fly to

Belfast

Route

Depart

Return

Price

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Wed 4/3

17:10-10:15

1 stop11h 05m

Belfast City

Sun 8/3

12:10-19:45

1 stop12h 35m

£466

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Sun 10/5

21:40-17:40

1 stop14h 00m

Belfast City

Sun 17/5

18:50-19:30

2 stops54h 40m

£470

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Wed 25/2

11:59-10:15

2 stops16h 16m

Belfast City

Sun 1/3

06:30-21:12

2 stops20h 42m

£477

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Wed 18/3

15:39-14:15

2 stops17h 36m

Belfast City

Sun 22/3

18:50-15:00

2 stops25h 10m

£478

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Fri 27/2

21:45-21:00

2 stops17h 15m

Belfast City

Tue 3/3

08:45-18:00

2 stops15h 15m

£481

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Sat 9/5

16:16-12:25

2 stops14h 09m

Belfast City

Sat 16/5

07:05-15:55

1 stop14h 50m

£515

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Mon 2/2

16:20-20:15

2 stops21h 55m

Belfast Intl

Thu 5/2

07:05-13:25

2 stops36h 20m

£691

ChicagoBelfast

MDW - BHD

MDWBHD

Chicago Midway

Wed 1/7

13:00-09:20

2 stops14h 20m

Belfast City

Fri 10/7

09:50-21:46

2 stops17h 56m

£3,645

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Fri 24/4

19:25-09:35

2 stops32h 10m

£179

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Fri 24/4

19:25-14:15

2 stops12h 50m

£183

Flights are sorted by cheapest return flights first.

Deals found on 6/1

Showing 1-10 of 24 results
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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 £466, British Airways can have you in Belfast from Illinois in 11h 05m. Airlines will cover a distance of 3644 mi.

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

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

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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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