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Cheap flights from Illinois to Belfast from £353

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 20/6. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — BHD
1 Feb — 8 Feb1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Illinois to Belfast

Enter your travel dates to find the best prices.

Best flights from Illinois to Belfast
Discover carefully curated flight deals from Illinois to Belfast that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 2 January 2026.

Thu 29/111:55STL - BHD
2 stops16h 25mAmerican Airlines
Mon 2/206:35BHD - STL
2 stops17h 39mAmerican Airlines
Deal found 30/12£468
Sun 19/421:15ORD - BHD
1 stop14h 30mBritish Airways
Thu 30/406:35BHD - ORD
1 stop13h 15mBritish Airways
Deal found 1/1£490
Fri 13/216:25ORD - BHD
1 stop18h 25mKLM
Tue 17/217:20BHD - ORD
2 stops30h 23mKLM
Deal found 1/1£548
Fri 19/614:20ORD - BFS
2 stops24h 40mMultiple Airlines
Sat 27/608:30BFS - ORD
2 stops34h 00mMultiple Airlines
Deal found 31/12£966
Fri 27/217:10ORD - BHD
1 stop11h 20mBritish Airways
Tue 3/308:45BHD - ORD
1 stop16h 00mBritish Airways
Deal found 30/12£504
Fri 27/214:40ORD - BHD
2 stops13h 50mAmerican Airlines
Tue 3/306:35BHD - ORD
2 stops16h 38mAmerican Airlines
Deal found 30/12£533
Wed 4/321:45ORD - BHD
1 stop10h 30mBritish Airways
Sun 8/320:25BHD - ORD
1 stop23h 25mBritish Airways
Deal found 31/12£523
Sun 19/419:18MDW - BHD
2 stops15h 37mKLM
Thu 30/409:50BHD - MDW
2 stops18h 39mKLM
Deal found 1/1£597
Sat 24/120:45ORD - BHD
1 stop14h 00mAmerican Airlines
Sat 31/109:15BHD - ORD
1 stop13h 45mAmerican Airlines
Deal found 31/12£559
Wed 18/322:45ORD - BHD
1 stop10h 30mBritish Airways
Sun 22/312:10BHD - ORD
2 stops24h 11mBritish Airways
Deal found 2/1£540
Thu 22/110:10ORD - BHD
2 stops18h 10mBritish Airways
Mon 26/119:25BHD - ORD
1 stop24h 25mBritish Airways
Deal found 1/1£560
Mon 12/118:44STL - BHD
2 stops17h 51mBritish Airways
Tue 20/106:35BHD - STL
2 stops17h 41mBritish Airways
Deal found 1/1£600
Wed 25/211:59STL - BHD
2 stops16h 16mBritish Airways
Sun 1/306:30BHD - STL
2 stops20h 42mBritish Airways
Deal found 30/12£624
Wed 4/218:14MDW - BHD
2 stops16h 36mKLM
Sat 7/217:20BHD - MDW
2 stops28h 56mKLM
Deal found 1/1£1,003
Sun 8/314:19STL - BHD
2 stops18h 36mBritish Airways
Mon 16/319:25BHD - STL
2 stops28h 27mBritish Airways
Deal found 1/1£3,169

Find flight deals from Illinois to Belfast

Keep the following information in mind while searching for Illinois to Belfast flight deals. Data was last updated 2 January 2026.

Round-trip from

£468

One-way from

£353
American Airlines
  • American Airlines
  • 29/1-2/2
  • 4 total stops
  • 34h 04m total
  • Illinois to Belfast
Search Deals
20/6
  • 20/6
  • 3 total stops
  • 37h 50m total
  • Illinois to Belfast
Search Deals

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 2 January 2026.
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

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Thu 29/1

11:55-10:20

2 stops16h 25m

Belfast City

Mon 2/2

06:35-18:14

2 stops17h 39m

£468

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Sun 19/4

21:15-17:45

1 stop14h 30m

Belfast City

Thu 30/4

06:35-13:50

1 stop13h 15m

£490

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Fri 27/2

17:10-10:30

1 stop11h 20m

Belfast City

Tue 3/3

08:45-18:45

1 stop16h 00m

£504

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Wed 4/3

21:45-14:15

1 stop10h 30m

Belfast City

Sun 8/3

20:25-14:50

1 stop23h 25m

£523

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Fri 27/2

14:40-10:30

2 stops13h 50m

Belfast City

Tue 3/3

06:35-17:13

2 stops16h 38m

£533

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Wed 18/3

22:45-14:15

1 stop10h 30m

Belfast City

Sun 22/3

12:10-07:21

2 stops24h 11m

£540

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Fri 13/2

16:25-16:50

1 stop18h 25m

Belfast City

Tue 17/2

17:20-17:43

2 stops30h 23m

£548

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Sat 24/1

20:45-16:45

1 stop14h 00m

Belfast City

Sat 31/1

09:15-17:00

1 stop13h 45m

£559

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Thu 22/1

10:10-10:20

2 stops18h 10m

Belfast City

Mon 26/1

19:25-13:50

1 stop24h 25m

£560

ChicagoBelfast

MDW - BHD

MDWBHD

Chicago Midway

Sun 19/4

19:18-16:55

2 stops15h 37m

Belfast City

Thu 30/4

09:50-22:29

2 stops18h 39m

£597

Flights are sorted by cheapest return flights first.

Deals found on 1/1

Showing 1-10 of 18 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 £490, American Airlines can have you in Belfast from Illinois in 14h 30m. 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 City.

  • 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.

See more FAQs

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Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

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?

Cheapflights helps you find that perfect flight to Belfast from Illinois by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

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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