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Cheap flights from Illinois to Belfast from £232

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 25/9. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — BHD
1 Sep — 8 Sep1
1 adult

Cheap flight deals from Illinois to Belfast

Keep the following information in mind while searching for Illinois to Belfast flight deals. Data was last updated 27 August 2025.

Round-trip from

£491

One-way from

£232
10/10-17/10
  • 10/10-17/10
  • 4 total stops
  • 37h 00m total
  • Illinois to Belfast
Search Deals
25/9
  • 25/9
  • 3 total stops
  • 37h 19m total
  • Illinois to Belfast
Search Deals

Find flight deals from Illinois to Belfast

Cheapest flights from Illinois to Belfast
Explore the most affordable flight options available from Illinois to Belfast. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 27 August 2025.

Fri 10/1022:15ORD - BFS
2 stops15h 50mMultiple Airlines
Fri 17/1006:05BFS - ORD
2 stops21h 10mMultiple Airlines
Deal found 26/8£491
Wed 3/1221:45ORD - BHD
1 stop12h 50mBritish Airways
Sun 7/1209:10BHD - ORD
1 stop15h 35mBritish Airways
Deal found 25/8£511
Mon 22/922:35ORD - BHD
1 stop12h 55mAmerican Airlines
Mon 29/906:40BHD - ORD
2 stops16h 43mAmerican Airlines
Deal found 26/8£519
Mon 22/916:40ORD - BHD
1 stop18h 15mKLM
Mon 29/917:25BHD - ORD
1 stop26h 45mKLM
Deal found 26/8£532
Sat 4/1020:40ORD - BHD
1 stop12h 25mAmerican Airlines
Sat 11/1007:05BHD - ORD
2 stops16h 21mAmerican Airlines
Deal found 26/8£549
Fri 3/1016:15ORD - BHD
1 stop18h 40mVirgin Atlantic
Tue 7/1006:30BHD - ORD
1 stop13h 40mVirgin Atlantic
Deal found 25/8£568
Thu 23/1017:11ORD - BHD
2 stops19h 34mBritish Airways
Sun 26/1020:25BHD - ORD
1 stop23h 25mBritish Airways
Deal found 25/8£568
Thu 9/1018:00ORD - BFS
3 stops21h 40mMultiple Airlines
Thu 16/1010:15BFS - ORD
2 stops35h 55mMultiple Airlines
Deal found 25/8£578
Fri 17/1013:08MDW - BHD
2 stops26h 07mDelta
Tue 21/1006:30BHD - MDW
2 stops17h 55mDelta
Deal found 25/8£579
Wed 10/915:36STL - BHD
2 stops19h 19mKLM
Wed 17/906:30BHD - STL
2 stops16h 15mKLM
Deal found 26/8£587
Thu 11/919:25ORD - BFS
2 stops19h 10mMultiple Airlines
Thu 18/906:10BFS - ORD
2 stops21h 05mMultiple Airlines
Deal found 24/8£589
Sun 28/915:45ORD - BFS
2 stops18h 10mMultiple Airlines
Mon 6/1023:45BFS - ORD
2 stops20h 15mMultiple Airlines
Deal found 24/8£603

Cheapflights Fare Finder

 
Customise your flight search to find flights from Illinois to Belfast 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 27 August 2025.
Use the filters below to find and compare flights from Illinois to Belfast that are best for you.

Fly from

Illinois

Fly to

Belfast

Route

Depart

Return

Price

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Fri 10/10

22:15-20:05

2 stops15h 50m

Belfast Intl

Fri 17/10

06:05-21:15

2 stops21h 10m

£491

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Wed 3/12

17:10-10:15

1 stop11h 05m

Belfast City

Sun 7/12

10:40-18:45

1 stop14h 05m

£511

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Mon 22/9

22:35-17:30

1 stop12h 55m

Belfast City

Mon 29/9

06:40-17:23

2 stops16h 43m

£519

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Mon 22/9

16:40-16:55

1 stop18h 15m

Belfast City

Mon 29/9

17:25-14:10

1 stop26h 45m

£532

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Thu 12/2

21:45-08:25

1 stop28h 40m

Belfast City

Tue 17/2

11:25-18:45

1 stop13h 20m

£533

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Sat 4/10

20:40-15:05

1 stop12h 25m

Belfast City

Sat 11/10

07:05-17:26

2 stops16h 21m

£549

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Thu 12/2

17:10-10:20

1 stop11h 10m

Belfast City

Tue 17/2

11:25-21:40

2 stops16h 15m

£558

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Fri 3/10

16:15-16:55

1 stop18h 40m

Belfast City

Tue 7/10

06:30-14:10

1 stop13h 40m

£568

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Thu 23/10

17:11-18:45

2 stops19h 34m

Belfast City

Sun 26/10

20:25-14:50

1 stop23h 25m

£568

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Thu 9/10

18:00-21:40

3 stops21h 40m

Belfast Intl

Thu 16/10

10:15-16:10

2 stops35h 55m

£578

Flights are sorted by cheapest return flights first.

Deals found on 26/8

Showing 1-10 of 37 results
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Best time to book a flight from Illinois to Belfast

Have a flexible travel schedule? Discover the best time to fly to Belfast 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
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. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Illinois to Belfast?

    For as low as £511, British Airways can have you in Belfast from Illinois in 11h 05m. Airlines will cover a distance of 3644 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

  • What are the most popular routes from Illinois to Belfast?

    The most popular route from Illinois to Belfast is Chicago O'Hare Intl - Belfast Intl. You may also consider Chicago O'Hare Intl - Belfast City or Chicago Midway - Belfast Intl.

  • Can I find deals for flights from Illinois to Belfast that include hotel bookings?

    Yes. In addition to deals on Illinois to Belfast flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Illinois to Belfast?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Illinois to Belfast.

  • Can I find deals for business class flights from Illinois to Belfast?

    Yes. Cheapflights offers flight deals from Illinois to Belfast by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Illinois to Belfast?

    Currently, January is the cheapest month in which you can book a flight from Illinois to Belfast (average of £67). Flying from Illinois to Belfast in July is currently the most expensive (average of £90). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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How does Cheapflights help users find flights from Illinois to Belfast?

Deals for Illinois to Belfast flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

Why should you use Cheapflights to find cheap flight tickets from Illinois to Belfast?

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Can Cheapflights find flights from Illinois to Belfast with no change fees?

Need flexible booking options for your flight to Belfast from Illinois? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

Can Cheapflights notify me if prices for flights from Illinois to Belfast become cheaper?

Yes! Start tracking prices for Illinois to Belfast flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

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