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Cheap flights from Belfast Intl Airport to Illinois 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 15/9. Fares are subject to change and may not be available on all flights or dates of travel.
BFS — ORD
17 Aug — 24 Aug1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Belfast Intl to Illinois

Enter your travel dates to find the best prices.

Cheapest flights from Belfast Intl to Illinois
Explore the most affordable flight options available from Belfast Intl to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 18 July 2026.

Sun 30/809:35
BFS
-
ORD
3 stops41h 45m
Multiple Airlines
Sun 6/922:25
ORD
-
BFS
2 stops16h 35m
Multiple Airlines
Deal found 16/7£609
Wed 19/807:35
BFS
-
ORD
3 stops37h 09m
Multiple Airlines
Thu 27/819:25
ORD
-
BFS
2 stops21h 00m
Multiple Airlines
Deal found 14/7£637
Tue 11/822:45
BFS
-
ORD
2 stops22h 10m
Multiple Airlines
Sun 16/808:40
ORD
-
BFS
3 stops32h 10m
Multiple Airlines
Deal found 14/7£674
Sun 20/921:25
BFS
-
ORD
3 stops28h 47m
Multiple Airlines
Fri 25/919:25
ORD
-
BFS
3 stops21h 55m
Multiple Airlines
Deal found 17/7£714

Find flight deals from Belfast Intl to Illinois

Keep the following information in mind while searching for Belfast Intl to Illinois flight deals. Data was last updated 18 July 2026.

Round-trip from

£609

One-way from

£291
30/8-6/9
  • 30/8-6/9
  • 5 total stops
  • 58h 20m total
  • Belfast to Illinois
Search Deals
15/9
  • 15/9
  • 3 total stops
  • 49h 20m total
  • Belfast to Illinois
Search Deals

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

BelfastChicago

BFS - ORD

BFSORD

Belfast Intl

Sun 30/8

09:35-21:20

3 stops41h 45m

Chicago O'Hare Intl

Sun 6/9

22:25-21:00

2 stops16h 35m

£609
Fastest return journey

BelfastChicago

BFS - ORD

BFSORD

Belfast Intl

Wed 19/8

07:35-16:57

2 stops15h 22m

Chicago O'Hare Intl

Thu 27/8

19:25-22:25

2 stops21h 00m

£647

BelfastChicago

BFS - ORD

BFSORD

Belfast Intl

Sun 20/9

21:25-20:12

3 stops28h 47m

Chicago O'Hare Intl

Fri 25/9

19:25-23:20

3 stops21h 55m

£714

BelfastChicago

BFS - ORD

BFSORD

Belfast Intl

Mon 7/9

14:40-14:25

2 stops29h 45m

Chicago O'Hare Intl

Mon 14/9

17:10-19:05

1 stop19h 55m

£729

BelfastChicago

BFS - ORD

BFSORD

Belfast Intl

Tue 11/8

10:30-13:10

2 stops32h 40m

Chicago O'Hare Intl

Sun 16/8

17:10-19:55

1 stop20h 45m

£1,170
Cheapest one-way
Fastest single journey

BelfastChicago

BFS - ORD

BFSORD

Belfast Intl

Tue 15/9

22:30-17:50

3 stops49h 20m

£291

Flights are sorted by cheapest return flights first.

Deals found on 14/7

Sorted by cheapest first

Best time to book a flight from Belfast Intl to Illinois

Have a flexible travel schedule? Discover the best time to fly to Illinois from Belfast Intl 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 Belfast Intl Airport to Illinois

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Related info for your journey

Find useful and relevant information for your journey from Belfast Intl to Illinois. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Belfast Intl to Illinois by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

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Alternative routes for Belfast Intl to Illinois

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