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Cheap flights from Illinois to Belfast from £447

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 22/1. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — BHD
9 Jan — 16 Jan1
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 10 December 2025.

Tue 30/1215:50ORD - BHD
2 stops14h 25mMultiple Airlines
Mon 5/111:50BHD - ORD
2 stops33h 35mMultiple Airlines
Deal found 9/12£1,174
Tue 30/1215:50ORD - BHD
2 stops14h 25mBritish Airways
Mon 5/118:50BHD - ORD
2 stops26h 35mBritish Airways
Deal found 8/12£1,176

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 10 December 2025.

Round-trip from

£447
22/1-29/1
  • 22/1-29/1
  • 4 total stops
  • 36h 10m 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 10 December 2025.
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 - BFS

ORDBFS

Chicago O'Hare Intl

Thu 22/1

18:30-20:25

2 stops19h 55m

Belfast Intl

Thu 29/1

07:05-17:20

2 stops16h 15m

£447

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Sat 24/1

12:06-09:10

2 stops15h 04m

Belfast City

Sat 31/1

06:35-18:13

2 stops17h 38m

£468

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Mon 12/1

18:44-16:05

2 stops15h 21m

Belfast City

Tue 20/1

06:35-18:16

2 stops17h 41m

£468

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Thu 8/1

12:11-10:20

2 stops16h 09m

Belfast City

Mon 12/1

11:30-23:59

2 stops18h 29m

£471

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Fri 20/2

16:11-14:15

2 stops16h 04m

Belfast City

Fri 27/2

11:30-18:45

1 stop13h 15m

£517

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Thu 12/3

21:45-14:00

1 stop11h 15m

Belfast City

Thu 19/3

09:05-18:00

1 stop13h 55m

£520

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Thu 12/3

16:19-14:00

2 stops16h 41m

Belfast City

Thu 19/3

09:05-21:25

2 stops17h 20m

£520

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Sat 24/1

18:30-14:25

2 stops13h 55m

Belfast City

Sat 31/1

07:15-17:20

2 stops16h 05m

£523

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Sat 24/1

20:55-16:50

2 stops37h 55m

Belfast City

Sat 31/1

15:05-13:50

1 stop28h 45m

£526

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Wed 11/2

21:45-16:35

1 stop12h 50m

Belfast City

Sun 15/2

17:35-13:50

1 stop26h 15m

£528

Flights are sorted by cheapest return flights first.

Deals found on 8/12

Showing 1-10 of 20 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 £468, British Airways can have you in Belfast from Illinois in 15h 04m. Airlines will cover a distance of 3893 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 Lambert-St Louis - Belfast Intl.

  • 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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