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Cheap flights from Illinois to Belfast Intl Airport from £251

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 5/7. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — BFS
29 Jun — 6 Jul1
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 30 May 2026.

Sun 5/709:50
ORD
-
BFS
2 stops26h 35m
Multiple Airlines
Tue 21/722:45
BFS
-
ORD
2 stops27h 07m
Multiple Airlines
Deal found 27/5£666
Fri 4/914:15
ORD
-
BFS
2 stops25h 35m
Multiple Airlines
Sat 12/909:30
BFS
-
ORD
3 stops36h 30m
Multiple Airlines
Deal found 29/5£672
Sun 19/709:50
ORD
-
BFS
2 stops26h 35m
Multiple Airlines
Mon 3/806:30
BFS
-
ORD
2 stops21h 35m
Multiple Airlines
Deal found 24/5£678
Thu 25/609:50
ORD
-
BFS
3 stops30h 35m
Multiple Airlines
Thu 2/706:40
BFS
-
ORD
2 stops16h 17m
Multiple Airlines
Deal found 28/5£836
Tue 9/610:15
MDW
-
BFS
3 stops27h 35m
Multiple Airlines
Fri 12/606:05
BFS
-
MDW
3 stops33h 30m
Multiple Airlines
Deal found 27/5£985
Sun 5/715:20
MDW
-
BFS
3 stops22h 35m
Multiple Airlines
Tue 21/706:15
BFS
-
MDW
3 stops33h 25m
Multiple Airlines
Deal found 29/5£1,862

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 30 May 2026.

Round-trip from

£666

One-way from

£251
5/7-21/7
  • 5/7-21/7
  • 4 total stops
  • 53h 42m total
  • Illinois to Belfast
Search Deals
5/7
  • 5/7
  • 2 total stops
  • 39h 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 30 May 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

Sun 5/7

09:50-18:25

2 stops26h 35m

Belfast Intl

Tue 21/7

23:30-16:57

2 stops23h 27m

£668

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Fri 4/9

14:15-21:50

2 stops25h 35m

Belfast Intl

Sat 12/9

09:30-16:00

3 stops36h 30m

£672

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Sun 19/7

09:50-18:25

2 stops26h 35m

Belfast Intl

Mon 3/8

06:30-22:05

2 stops21h 35m

£678

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Thu 25/6

09:50-22:25

3 stops30h 35m

Belfast Intl

Thu 2/7

06:40-16:57

2 stops16h 17m

£836
Fastest return journey

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Tue 9/6

08:50-16:20

2 stops25h 30m

Belfast Intl

Fri 12/6

06:05-20:16

3 stops20h 11m

£937

ChicagoBelfast

MDW - BFS

MDWBFS

Chicago Midway

Tue 9/6

10:15-19:50

3 stops27h 35m

Belfast Intl

Fri 12/6

06:05-09:35

3 stops33h 30m

£985

ChicagoBelfast

MDW - BFS

MDWBFS

Chicago Midway

Sun 5/7

15:20-19:55

3 stops22h 35m

Belfast Intl

Tue 21/7

06:15-09:40

3 stops33h 25m

£1,862
Cheapest one-way

ChicagoBelfast

MDW - BFS

MDWBFS

Chicago Midway

Sun 5/7

10:25-08:05

2 stops39h 40m

£251
Fastest single journey

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Sun 5/7

15:45-18:25

2 stops20h 40m

£267

Flights are sorted by cheapest return flights first.

Deals found on 25/5

Sorted by cheapest first

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
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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