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Cheap flights from Illinois to Belfast Intl Airport from £208

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 23/8. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — BFS
3 Apr — 10 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 4 March 2026.

Mon 13/419:25
ORD
-
BFS
2 stops19h 30m
Multiple Airlines
Tue 28/407:00
BFS
-
ORD
3 stops17h 15m
Multiple Airlines
Deal found 27/2£490
Wed 15/419:25
ORD
-
BFS
2 stops19h 15m
Multiple Airlines
Wed 22/408:15
BFS
-
ORD
2 stops40h 00m
Multiple Airlines
Deal found 1/3£538
Mon 9/319:30
ORD
-
BFS
2 stops17h 25m
Multiple Airlines
Mon 16/321:00
BFS
-
ORD
2 stops26h 20m
Multiple Airlines
Deal found 1/3£541
Mon 13/411:25
ORD
-
BFS
2 stops30h 40m
Multiple Airlines
Mon 20/406:25
BFS
-
ORD
2 stops33h 15m
Multiple Airlines
Deal found 3/3£622
Sun 6/915:45
ORD
-
BFS
2 stops24h 05m
Multiple Airlines
Sun 20/909:55
BFS
-
ORD
2 stops36h 00m
Multiple Airlines
Deal found 1/3£657
Sun 20/916:05
ORD
-
BFS
2 stops23h 45m
Multiple Airlines
Wed 30/920:30
BFS
-
ORD
3 stops27h 20m
Multiple Airlines
Deal found 28/2£663
Wed 9/915:35
ORD
-
BFS
2 stops24h 45m
Multiple Airlines
Sun 13/909:55
BFS
-
ORD
2 stops36h 00m
Multiple Airlines
Deal found 2/3£680

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 4 March 2026.

Round-trip from

£490

One-way from

£208
13/4-28/4
  • 13/4-28/4
  • 5 total stops
  • 36h 45m total
  • Illinois to Belfast
Search Deals
23/8
  • 23/8
  • 2 total stops
  • 23h 45m 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 4 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

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Mon 13/4

19:25-20:55

2 stops19h 30m

Belfast Intl

Tue 28/4

07:00-18:15

3 stops17h 15m

£490

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Wed 15/4

19:25-20:40

2 stops19h 15m

Belfast Intl

Wed 22/4

08:15-18:15

2 stops40h 00m

£538

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Mon 13/4

11:25-00:05

2 stops30h 40m

Belfast Intl

Mon 20/4

06:25-09:40

2 stops33h 15m

£622

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Tue 17/3

08:00-20:10

2 stops31h 10m

Belfast Intl

Sun 22/3

07:25-00:22

3 stops45h 57m

£1,119

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Mon 20/7

15:45-10:00

2 stops12h 15m

Belfast Intl

Fri 24/7

07:05-19:15

2 stops18h 10m

£1,146

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Sun 23/8

15:45-21:30

2 stops23h 45m

£208

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Mon 9/3

18:51-18:50

3 stops42h 59m

£215

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Fri 21/8

15:35-21:15

2 stops23h 40m

£244

ChicagoBelfast

MDW - BFS

MDWBFS

Chicago Midway

Wed 15/4

07:30-15:20

3 stops25h 50m

£260

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Tue 19/5

22:25-22:20

3 stops41h 55m

£269

Flights are sorted by cheapest return flights first.

Deals found on 2/3

Showing 1-10 of 11 resultsSorted by cheapest first
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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

How much does it cost for a return flight from Illinois to Belfast Intl Airport?

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 Lambert-St Louis - Belfast Intl or Chicago Midway - 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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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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