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Cheap flights from Illinois to Belfast Intl Airport from £231

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 13/11. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — BFS
14 Sep — 21 Sep1
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 15 August 2026.

Tue 22/919:25 -
2 stops14h 55m
Tue 29/906:40 -
3 stops41h 35m
Deal found 10/8£562
Thu 24/919:25 -
2 stops18h 05m
Thu 1/1021:10 -
3 stops30h 15m
Deal found 10/8£569
Mon 28/919:25 -
2 stops19h 30m
Mon 5/1009:10 -
2 stops35h 05m
Deal found 14/8£600
Fri 25/919:25 -
2 stops20h 25m
Fri 2/1020:25 -
3 stops47h 50m
Deal found 11/8£631
Sun 27/922:25 -
2 stops16h 35m
Sun 4/1009:55 -
2 stops32h 40m
Deal found 13/8£644
Thu 24/908:55 -
3 stops31h 55m
Thu 1/1022:45 -
2 stops21h 15m
Deal found 10/8£967
Sat 26/908:55 -
3 stops32h 10m
Sat 3/1015:20 -
2 stops28h 05m
Deal found 11/8£1,601

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 15 August 2026.

Round-trip from

£562

One-way from

£231
22/9-29/9
  • 22/9-29/9
  • 5 total stops
  • 56h 30m total
  • Illinois to Belfast
Search Deals
13/11
  • 13/11
  • 2 total stops
  • 30h 00m 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 15 August 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 Chicago O'Hare Intl - BFS Belfast Intl

ORDBFS

Chicago O'Hare Intl

Tue 22/9

19:25-23:20

3 stops21h 55m

Belfast Intl

Tue 29/9

06:40-18:15

3 stops41h 35m

£583

ChicagoBelfast

ORD Chicago O'Hare Intl - BFS Belfast Intl

ORDBFS

Chicago O'Hare Intl

Mon 28/9

19:25-23:20

3 stops21h 55m

Belfast Intl

Mon 5/10

09:10-14:15

2 stops35h 05m

£702

ChicagoBelfast

ORD Chicago O'Hare Intl - BFS Belfast Intl

ORDBFS

Chicago O'Hare Intl

Sat 29/8

22:25-21:30

3 stops17h 05m

Belfast Intl

Sun 6/9

21:10-10:15

3 stops43h 05m

£716

ChicagoBelfast

ORD Chicago O'Hare Intl - BFS Belfast Intl

ORDBFS

Chicago O'Hare Intl

Fri 11/9

15:45-19:50

2 stops22h 05m

Belfast Intl

Fri 18/9

20:15-19:48

2 stops29h 33m

£729

ChicagoBelfast

ORD Chicago O'Hare Intl - BFS Belfast Intl

ORDBFS

Chicago O'Hare Intl

Sun 27/9

19:25-21:00

2 stops19h 35m

Belfast Intl

Sun 4/10

22:05-14:00

2 stops21h 55m

£742
Fastest return journey

ChicagoBelfast

ORD Chicago O'Hare Intl - BFS Belfast Intl

ORDBFS

Chicago O'Hare Intl

Sat 26/9

14:15-09:20

2 stops13h 05m

Belfast Intl

Sat 3/10

06:20-20:12

2 stops19h 52m

£748

St. LouisBelfast

STL Lambert-St Louis - BFS Belfast Intl

STLBFS

Lambert-St Louis

Thu 24/9

08:55-22:50

3 stops31h 55m

Belfast Intl

Thu 1/10

22:45-14:00

2 stops21h 15m

£967

St. LouisBelfast

STL Lambert-St Louis - BFS Belfast Intl

STLBFS

Lambert-St Louis

Sat 26/9

08:55-23:05

3 stops32h 10m

Belfast Intl

Sat 3/10

15:20-13:25

2 stops28h 05m

£1,601
Cheapest one-way

ChicagoBelfast

ORD Chicago O'Hare Intl - BFS Belfast Intl

ORDBFS

Chicago O'Hare Intl

Fri 13/11

19:25-07:25

2 stops30h 00m

£231

ChicagoBelfast

ORD Chicago O'Hare Intl - BFS Belfast Intl

ORDBFS

Chicago O'Hare Intl

Sun 13/9

22:25-20:40

3 stops40h 15m

£339

Flights are sorted by cheapest return flights first.

Deals found on 12/8

Showing 1-10 of 11 resultsSorted by cheapest first
1
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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

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

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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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