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Cheap flights from Illinois to Belfast Intl Airport from £483

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 24/1. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — BFS
11 Jan — 18 Jan1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Illinois to Belfast Intl

Enter your travel dates to find the best prices.

Best flights from Illinois to Belfast Intl
Discover carefully curated flight deals from Illinois to Belfast Intl that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 12 December 2025.

Sat 24/118:30ORD - BFS
3 stops23h 20mMultiple Airlines
Sat 31/119:30BFS - ORD
3 stops27h 50mMultiple Airlines
Deal found 10/12£496
Mon 16/319:30ORD - BFS
2 stops19h 45mMultiple Airlines
Fri 20/308:05BFS - ORD
3 stops41h 55mMultiple Airlines
Deal found 11/12£605
Wed 1/408:40ORD - BFS
3 stops31h 40mMultiple Airlines
Tue 7/421:15BFS - ORD
3 stops27h 00mMultiple Airlines
Deal found 10/12£608
Fri 20/220:15ORD - BFS
2 stops19h 45mMultiple Airlines
Fri 27/206:30BFS - ORD
3 stops34h 57mMultiple Airlines
Deal found 9/12£627
Sat 6/619:25ORD - BFS
3 stops20h 50mMultiple Airlines
Fri 12/619:55BFS - ORD
3 stops28h 20mMultiple Airlines
Deal found 11/12£740
Fri 24/415:30STL - BFS
2 stops16h 45mMultiple Airlines
Mon 4/521:25BFS - STL
3 stops46h 05mMultiple Airlines
Deal found 10/12£1,985
Sat 6/613:00STL - BFS
3 stops27h 40mMultiple Airlines
Fri 12/619:55BFS - STL
3 stops47h 35mMultiple Airlines
Deal found 11/12£2,111

Find flight deals from Illinois to Belfast Intl

Keep the following information in mind while searching for Illinois to Belfast Intl flight deals. Data was last updated 12 December 2025.

Round-trip from

£483
24/1-31/1
  • 24/1-31/1
  • 4 total stops
  • 28h 25m total
  • Illinois to Belfast
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Cheapflights Fare Finder

 
Customise your flight search to find flights from Illinois to Belfast Intl 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 12 December 2025.
Use the filters below to find and compare flights from Illinois to Belfast Intl Airport that are best for you.

Fly from

Illinois

Fly to

Belfast Intl

Route

Depart

Return

Price

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Sat 24/1

18:30-23:50

3 stops23h 20m

Belfast Intl

Sat 31/1

19:30-17:20

3 stops27h 50m

£496

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Mon 16/3

19:30-20:15

2 stops19h 45m

Belfast Intl

Fri 20/3

08:05-21:00

3 stops41h 55m

£605

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Wed 1/4

08:40-22:20

3 stops31h 40m

Belfast Intl

Tue 7/4

21:15-18:15

3 stops27h 00m

£608

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Fri 20/2

20:15-22:00

2 stops19h 45m

Belfast Intl

Fri 27/2

06:30-11:27

3 stops34h 57m

£627

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Sat 6/6

19:25-22:15

3 stops20h 50m

Belfast Intl

Fri 12/6

19:55-18:15

3 stops28h 20m

£740

St. LouisBelfast

STL - BFS

STLBFS

Lambert-St Louis

Fri 24/4

15:30-14:15

2 stops16h 45m

Belfast Intl

Mon 4/5

21:25-13:30

3 stops46h 05m

£1,985

St. LouisBelfast

STL - BFS

STLBFS

Lambert-St Louis

Sat 6/6

13:00-22:40

3 stops27h 40m

Belfast Intl

Fri 12/6

19:55-13:30

3 stops47h 35m

£2,111

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Wed 17/12

08:36-09:35

3 stops42h 59m

£512

Flights are sorted by cheapest return flights first.

Deals found on 11/12

Best time to book a flight from Illinois to Belfast Intl

Have a flexible travel schedule? Discover the best time to fly to Belfast Intl 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 Intl 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 Intl. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

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

    While some choose either Chicago O'Hare Intl - Belfast Intl or Chicago Midway - Belfast Intl, Lambert-St Louis - Belfast Intl is the most popular route from Illinois to Belfast Intl Airport.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Illinois to Belfast Intl 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 Intl Airport?

Book flights to Belfast Intl Airport if you plan to visit one of these locations
Armagh
Newry
Ballymena
Cookstown
Dungannon

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Alternative routes for Illinois to Belfast Intl

See prices for flight routes from nearby airports that may be better suited for you.
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Fly with Cheapflights

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

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Illinois to Belfast Intl. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

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

Millions of users choose and trust Cheapflights to book the best flight deals from Illinois to Belfast Intl for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

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

Yes! Cheapflights helps users easily find flights from Illinois to Belfast Intl with no change fees.

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

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

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