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Cheap flights from Illinois to Belfast Intl Airport from £175

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 25/4. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — BFS
18 Feb — 25 Feb1
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 19 January 2026.

Round-trip from

£571

One-way from

£175
29/1-3/2
  • 29/1-3/2
  • 4 total stops
  • 38h 40m total
  • Illinois to Belfast
Search Deals
25/4
  • 25/4
  • 2 total stops
  • 30h 50m 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 19 January 2026.

Thu 29/118:30
ORD
-
BFS
2 stops21h 50m
Multiple Airlines
Tue 3/206:30
BFS
-
ORD
2 stops16h 50m
Multiple Airlines
Deal found 17/1£571
Sun 2/821:00
ORD
-
BFS
2 stops18h 30m
Multiple Airlines
Mon 10/805:50
BFS
-
ORD
1 stop15h 20m
Multiple Airlines
Deal found 17/1£988
Wed 3/615:45
ORD
-
BFS
2 stops17h 35m
Multiple Airlines
Thu 11/608:15
BFS
-
ORD
1 stop36h 55m
Multiple Airlines
Deal found 18/1£1,001
Sat 1/814:20
ORD
-
BFS
2 stops24h 20m
Multiple Airlines
Mon 10/805:50
BFS
-
ORD
1 stop15h 20m
Multiple Airlines
Deal found 17/1£1,015

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 19 January 2026.
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

Thu 29/1

18:30-22:20

2 stops21h 50m

Belfast Intl

Tue 3/2

06:30-17:20

2 stops16h 50m

£571

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Wed 3/6

15:45-15:20

2 stops17h 35m

Belfast Intl

Thu 11/6

08:15-15:10

1 stop36h 55m

£1,001

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Sat 25/4

19:25-08:15

2 stops30h 50m

£175

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Mon 13/4

19:25-07:05

2 stops29h 40m

£179

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Sun 15/2

06:40-07:55

2 stops43h 15m

£194

Flights are sorted by cheapest return flights first.

Deals found on 17/1

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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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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