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Cheap flights from Illinois to Belfast Intl Airport from £219

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 24/4. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — BFS
17 Apr — 24 Apr1
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 18 March 2026.

Thu 16/411:25
ORD
-
BFS
2 stops30h 00m
Multiple Airlines
Mon 27/406:40
BFS
-
ORD
2 stops33h 00m
Multiple Airlines
Deal found 14/3£566
Fri 1/519:15
ORD
-
BFS
3 stops19h 30m
Multiple Airlines
Fri 8/513:45
BFS
-
ORD
2 stops32h 25m
Multiple Airlines
Deal found 17/3£613
Thu 8/1011:25
ORD
-
BFS
2 stops28h 15m
Multiple Airlines
Fri 16/1007:05
BFS
-
ORD
2 stops32h 35m
Multiple Airlines
Deal found 15/3£621
Sat 9/522:30
ORD
-
BFS
2 stops16h 10m
Multiple Airlines
Sun 17/506:10
BFS
-
ORD
3 stops29h 15m
Multiple Airlines
Deal found 17/3£676
Tue 28/419:25
ORD
-
BFS
2 stops13h 50m
Multiple Airlines
Sun 3/509:55
BFS
-
ORD
3 stops31h 47m
Multiple Airlines
Deal found 16/3£681
Mon 23/322:50
ORD
-
BFS
2 stops16h 25m
Multiple Airlines
Wed 15/408:15
BFS
-
ORD
3 stops32h 08m
Multiple Airlines
Deal found 16/3£683
Thu 20/819:25
ORD
-
BFS
2 stops17h 55m
Multiple Airlines
Mon 31/807:05
BFS
-
ORD
3 stops20h 20m
Multiple Airlines
Deal found 14/3£717
Fri 1/506:30
STL
-
BFS
3 stops25h 55m
Multiple Airlines
Fri 8/522:00
BFS
-
STL
2 stops28h 04m
Multiple Airlines
Deal found 17/3£1,274

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 18 March 2026.

Round-trip from

£566

One-way from

£219
16/4-27/4
  • 16/4-27/4
  • 4 total stops
  • 63h 00m total
  • Illinois to Belfast
Search Deals
24/4
  • 24/4
  • 2 total stops
  • 51h 50m 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 18 March 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

Fri 1/5

22:25-21:50

2 stops17h 25m

Belfast Intl

Fri 8/5

06:05-23:07

2 stops23h 02m

£618

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Sat 9/5

22:30-20:40

2 stops16h 10m

Belfast Intl

Sun 17/5

06:10-05:25

3 stops29h 15m

£676

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Tue 28/4

19:25-15:15

2 stops13h 50m

Belfast Intl

Sun 3/5

09:55-11:42

3 stops31h 47m

£681

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Thu 20/8

19:25-19:20

2 stops17h 55m

Belfast Intl

Mon 31/8

07:05-21:25

3 stops20h 20m

£717

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Thu 6/8

15:45-19:30

2 stops21h 45m

Belfast Intl

Sat 15/8

07:40-11:50

2 stops34h 10m

£794

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Wed 15/7

08:45-15:20

3 stops24h 35m

Belfast Intl

Wed 29/7

08:55-11:50

2 stops32h 55m

£874

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Thu 30/4

14:20-19:30

2 stops23h 10m

Belfast Intl

Thu 7/5

08:15-15:10

1 stop36h 55m

£875
Fastest return journey

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Sat 16/5

11:05-08:55

3 stops15h 50m

Belfast Intl

Sun 24/5

07:10-19:25

2 stops18h 15m

£886

St. LouisBelfast

STL - BFS

STLBFS

Lambert-St Louis

Fri 1/5

06:30-14:25

3 stops25h 55m

Belfast Intl

Fri 8/5

15:15-20:04

3 stops34h 49m

£1,351
Cheapest one-way

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Fri 24/4

22:25-08:15

2 stops51h 50m

£219

Flights are sorted by cheapest return flights first.

Deals found on 18/3

Showing 1-10 of 14 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
Ballymena
Cookstown
Dungannon

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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?

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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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