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Cheap flights from Illinois to Belfast Intl Airport from £176

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 30/8. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — BFS
10 Aug — 17 Aug1
1 adult
1 adult, Economy, 0 bags

Cheap 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 11 July 2026.

Thu 1/1019:25
ORD
-
BFS
2 stops17h 55m
Multiple Airlines
Wed 7/1008:15
BFS
-
ORD
2 stops19h 10m
Multiple Airlines
Deal found 8/7£499
Mon 5/1019:25
ORD
-
BFS
2 stops14h 10m
Multiple Airlines
Sun 11/1007:10
BFS
-
ORD
2 stops20h 15m
Multiple Airlines
Deal found 8/7£517
Tue 1/1218:30
ORD
-
BFS
2 stops20h 25m
Multiple Airlines
Wed 9/1210:40
BFS
-
ORD
3 stops36h 40m
Multiple Airlines
Deal found 9/7£560
Mon 24/822:25
ORD
-
BFS
2 stops17h 50m
Multiple Airlines
Mon 31/806:40
BFS
-
ORD
3 stops33h 36m
Multiple Airlines
Deal found 10/7£568
Sun 23/819:25
ORD
-
BFS
2 stops20h 05m
Multiple Airlines
Sun 30/809:35
BFS
-
ORD
3 stops41h 45m
Multiple Airlines
Deal found 9/7£587
Fri 9/1019:25
ORD
-
BFS
2 stops19h 50m
Multiple Airlines
Fri 23/1017:30
BFS
-
ORD
3 stops30h 45m
Multiple Airlines
Deal found 9/7£592

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 11 July 2026.

Round-trip from

£499

One-way from

£176
1/10-7/10
  • 1/10-7/10
  • 4 total stops
  • 37h 05m total
  • Illinois to Belfast
Search Deals
30/8
  • 30/8
  • 3 total stops
  • 53h 40m total
  • Illinois to Belfast
Search Deals

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 11 July 2026.
Use the filters below to find and compare flights from Illinois to Belfast Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Sat 22/8

19:25-23:25

2 stops22h 00m

Belfast Intl

Sat 29/8

20:15-21:25

3 stops31h 10m

£568
Fastest return journey

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Mon 24/8

22:25-22:15

2 stops17h 50m

Belfast Intl

Mon 31/8

06:40-18:15

2 stops17h 35m

£595

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Thu 12/11

18:30-19:10

2 stops18h 40m

Belfast Intl

Sun 15/11

13:35-16:45

3 stops33h 10m

£599

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

£650

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

£653

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Sun 9/8

18:00-21:50

2 stops21h 50m

Belfast Intl

Tue 25/8

20:15-12:40

3 stops46h 25m

£657

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Tue 18/8

19:25-22:15

2 stops20h 50m

Belfast Intl

Tue 25/8

05:55-20:20

3 stops20h 25m

£657

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Mon 5/10

08:45-13:15

3 stops22h 30m

Belfast Intl

Sun 11/10

16:10-19:48

3 stops33h 38m

£665
Cheapest one-way
Fastest single journey

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Sat 12/9

19:25-20:50

2 stops19h 25m

£230

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Sun 30/8

19:25-10:00

2 stops32h 35m

£243

Flights are sorted by cheapest return flights first.

Deals found on 6/7

Showing 1-10 of 13 resultsSorted by cheapest first
1
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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

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

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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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