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Cheap flights from Illinois to Belfast Intl Airport from £291

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 15/12. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — BFS
14 Dec — 21 Dec1
1 adult
1 adult, Economy, 0 bags

Cheap 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 14 November 2025.

Round-trip from

£502

One-way from

£291
8/12-12/12
  • 8/12-12/12
  • 4 total stops
  • 37h 30m total
  • Illinois to Belfast
Search Deals
15/12
  • 15/12
  • 2 total stops
  • 19h 29m total
  • Illinois to Belfast
Search Deals

Find flight deals from Illinois to Belfast Intl

Enter your travel dates to find the best prices.

Cheapest flights from Illinois to Belfast Intl
Explore the most affordable flight options available from Illinois to Belfast Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 14 November 2025.

Mon 8/1218:30ORD - BFS
2 stops20h 40mMultiple Airlines
Fri 12/1206:30BFS - ORD
2 stops16h 50mMultiple Airlines
Deal found 13/11£502
Sun 28/1221:50ORD - BFS
2 stops18h 10mMultiple Airlines
Sat 3/106:00BFS - ORD
3 stops22h 07mMultiple Airlines
Deal found 13/11£1,122
Sat 27/1214:00ORD - BFS
2 stops23h 55mMultiple Airlines
Sat 3/106:00BFS - ORD
3 stops22h 07mMultiple Airlines
Deal found 12/11£1,202
Tue 23/1217:20ORD - BFS
1 stop22h 20mMultiple Airlines
Tue 6/120:55BFS - ORD
2 stops42h 17mMultiple Airlines
Deal found 13/11£1,338
Wed 17/1217:20ORD - BFS
1 stop14h 50mMultiple Airlines
Tue 6/120:55BFS - ORD
2 stops26h 25mMultiple Airlines
Deal found 13/11£1,413

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 14 November 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

Mon 8/12

18:30-19:05

2 stops18h 35m

Belfast Intl

Fri 12/12

09:10-17:55

3 stops38h 45m

£727

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Sun 28/12

21:50-22:00

2 stops18h 10m

Belfast Intl

Sat 3/1

06:00-22:07

3 stops22h 07m

£1,122

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Sat 27/12

14:00-19:55

2 stops23h 55m

Belfast Intl

Sat 3/1

06:00-22:07

3 stops22h 07m

£1,202

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Tue 23/12

17:20-21:40

1 stop22h 20m

Belfast Intl

Tue 6/1

20:55-09:12

2 stops42h 17m

£1,338

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Wed 17/12

17:20-14:10

1 stop14h 50m

Belfast Intl

Tue 6/1

20:55-17:20

2 stops26h 25m

£1,413

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Thu 18/12

18:20-17:00

2 stops16h 40m

Belfast Intl

Mon 5/1

05:45-19:55

1 stop20h 10m

£1,683

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Sun 21/12

16:25-13:40

1 stop15h 15m

Belfast Intl

Sun 4/1

14:45-15:10

2 stops30h 25m

£2,300

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Mon 15/12

08:36-10:05

2 stops19h 29m

£291

Flights are sorted by cheapest return flights first.

Deals found on 13/11

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 Midway - Belfast Intl or Lambert-St Louis - Belfast Intl, Chicago O'Hare Intl - 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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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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