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Cheap flights from Illinois to Belfast Intl Airport from £252

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 30/9. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — BFS
15 Jun — 22 Jun1
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 16 May 2026.

Wed 10/608:50
ORD
-
BFS
2 stops28h 25m
Multiple Airlines
Mon 15/621:55
BFS
-
ORD
3 stops37h 57m
Multiple Airlines
Deal found 13/5£673
Wed 2/1207:15
ORD
-
BFS
3 stops30h 05m
Multiple Airlines
Tue 8/1210:05
BFS
-
ORD
3 stops35h 25m
Multiple Airlines
Deal found 12/5£698
Fri 12/616:37
ORD
-
BFS
2 stops17h 53m
Multiple Airlines
Mon 15/621:55
BFS
-
ORD
3 stops43h 26m
Multiple Airlines
Deal found 15/5£718
Thu 11/616:37
ORD
-
BFS
2 stops20h 18m
Multiple Airlines
Thu 18/606:10
BFS
-
ORD
3 stops45h 55m
Multiple Airlines
Deal found 13/5£730
Mon 19/1011:05
ORD
-
BFS
3 stops27h 50m
Multiple Airlines
Wed 28/1021:00
BFS
-
ORD
3 stops47h 40m
Multiple Airlines
Deal found 12/5£752
Fri 5/609:55
ORD
-
BFS
2 stops24h 35m
Multiple Airlines
Thu 11/606:10
BFS
-
ORD
3 stops32h 50m
Multiple Airlines
Deal found 11/5£764
Sat 1/822:25
ORD
-
BFS
2 stops16h 25m
Multiple Airlines
Sun 9/806:55
BFS
-
ORD
2 stops20h 30m
Multiple Airlines
Deal found 11/5£810
Tue 7/709:50
ORD
-
BFS
2 stops30h 25m
Multiple Airlines
Mon 20/706:30
BFS
-
ORD
2 stops21h 35m
Multiple Airlines
Deal found 15/5£823
Tue 9/608:40
STL
-
BFS
2 stops29h 10m
Multiple Airlines
Fri 19/621:05
BFS
-
STL
3 stops45h 16m
Multiple Airlines
Deal found 12/5£835
Fri 12/607:22
STL
-
BFS
3 stops31h 23m
Multiple Airlines
Fri 19/621:05
BFS
-
STL
3 stops45h 16m
Multiple Airlines
Deal found 13/5£972
Sun 28/614:15
STL
-
BFS
2 stops25h 15m
Multiple Airlines
Sun 5/706:45
BFS
-
STL
3 stops37h 17m
Multiple Airlines
Deal found 14/5£1,084
Thu 25/610:25
MDW
-
BFS
3 stops30h 25m
Multiple Airlines
Sun 28/606:45
BFS
-
MDW
3 stops17h 46m
Multiple Airlines
Deal found 14/5£1,126

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 16 May 2026.

Round-trip from

£673

One-way from

£252
10/6-15/6
  • 10/6-15/6
  • 5 total stops
  • 66h 22m total
  • Illinois to Belfast
Search Deals
30/9
  • 30/9
  • 2 total stops
  • 20h 55m 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 16 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

Thu 11/6

16:37-18:55

2 stops20h 18m

Belfast Intl

Thu 18/6

06:10-22:05

3 stops45h 55m

£730

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Fri 5/6

15:45-16:30

2 stops18h 45m

Belfast Intl

Thu 11/6

21:10-05:52

3 stops38h 42m

£778

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Sat 1/8

22:25-20:50

2 stops16h 25m

Belfast Intl

Sun 9/8

06:55-21:25

2 stops20h 30m

£810

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Tue 7/7

09:50-22:15

2 stops30h 25m

Belfast Intl

Mon 20/7

06:30-22:05

2 stops21h 35m

£823

St. LouisBelfast

STL - BFS

STLBFS

Lambert-St Louis

Tue 9/6

08:40-19:50

2 stops29h 10m

Belfast Intl

Fri 19/6

21:05-12:21

3 stops45h 16m

£835

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Thu 18/6

08:50-18:55

3 stops28h 05m

Belfast Intl

Tue 23/6

05:55-16:57

2 stops17h 02m

£857

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Mon 29/6

14:15-17:50

2 stops21h 35m

Belfast Intl

Mon 6/7

20:35-15:55

2 stops25h 20m

£918

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Mon 22/6

07:10-22:25

3 stops33h 15m

Belfast Intl

Mon 29/6

06:30-07:50

3 stops31h 20m

£941

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Sun 28/6

08:50-12:50

2 stops22h 00m

Belfast Intl

Sat 4/7

06:55-16:57

2 stops16h 02m

£958

St. LouisBelfast

STL - BFS

STLBFS

Lambert-St Louis

Fri 12/6

07:22-20:45

3 stops31h 23m

Belfast Intl

Fri 19/6

21:05-12:21

3 stops45h 16m

£972

Flights are sorted by cheapest return flights first.

Deals found on 11/5

Showing 1-10 of 14 resultsSorted by cheapest first
1
2

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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