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Cheap flights from Illinois to Belfast from £191

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 9/1. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — BHD
19 Dec — 26 Dec1
1 adult
1 adult, Economy, 0 bags

Find flight deals from Illinois to Belfast

Enter your travel dates to find the best prices.

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 19 November 2025.

Tue 18/1120:40ORD - BHD
1 stop14h 05mAmerican Airlines
Tue 25/1110:00BHD - ORD
1 stop13h 00mAmerican Airlines
Deal found 17/11£486
Wed 3/1216:25ORD - BHD
1 stop18h 25mDelta
Sun 7/1217:20BHD - ORD
1 stop27h 00mDelta
Deal found 17/11£541
Tue 16/1215:50ORD - BFS
2 stops19h 10mMultiple Airlines
Tue 23/1220:55BFS - ORD
2 stops23h 05mMultiple Airlines
Deal found 17/11£574
Wed 10/1212:49STL - BHD
2 stops26h 11mDelta
Wed 24/1217:20BHD - STL
2 stops29h 40mDelta
Deal found 18/11£595
Wed 3/1210:45STL - BHD
2 stops24h 05mDelta
Sun 7/1206:30BHD - STL
2 stops17h 26mDelta
Deal found 17/11£598
Fri 5/1206:00STL - BHD
2 stops28h 50mDelta
Tue 9/1206:30BHD - STL
2 stops15h 36mDelta
Deal found 18/11£603
Tue 16/1218:35ORD - BHD
1 stop10h 55mBritish Airways
Tue 23/1219:25BHD - ORD
1 stop29h 20mBritish Airways
Deal found 17/11£625
Fri 5/1214:38STL - BHD
2 stops20h 12mKLM
Tue 9/1206:30BHD - STL
2 stops16h 40mKLM
Deal found 16/11£640
Tue 18/1118:30ORD - BFS
2 stops15h 30mMultiple Airlines
Tue 25/1106:30BFS - ORD
3 stops38h 30mMultiple Airlines
Deal found 17/11£685
Wed 10/1209:53STL - BHD
2 stops17h 17mAmerican Airlines
Tue 23/1208:45BHD - STL
2 stops19h 59mAmerican Airlines
Deal found 18/11£687
Tue 16/1215:50ORD - BHD
2 stops14h 25mAer Lingus
Tue 23/1215:05BHD - ORD
1 stop28h 45mAer Lingus
Deal found 17/11£703
Sun 14/1210:45STL - BHD
2 stops24h 05mDelta
Wed 24/1217:20BHD - STL
2 stops34h 56mDelta
Deal found 18/11£725

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 19 November 2025.

Round-trip from

£473

One-way from

£191
British Airways
  • British Airways
  • 12/1-20/1
  • 4 total stops
  • 33h 02m total
  • Illinois to Belfast
Search Deals
9/1
  • 9/1
  • 2 total stops
  • 14h 40m 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 19 November 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

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Mon 12/1

18:44-16:05

2 stops15h 21m

Belfast City

Tue 20/1

06:35-18:16

2 stops17h 41m

£473

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Tue 10/3

18:10-10:30

1 stop11h 20m

Belfast City

Wed 18/3

06:35-14:50

1 stop13h 15m

£487

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Tue 10/3

22:45-16:45

1 stop13h 00m

Belfast City

Mon 16/3

17:45-14:50

1 stop26h 05m

£487

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Tue 10/3

22:45-18:40

1 stop14h 55m

Belfast City

Fri 20/3

11:30-19:45

1 stop13h 15m

£487

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Tue 10/3

22:45-16:45

1 stop13h 00m

Belfast City

Tue 17/3

19:25-14:50

1 stop24h 25m

£487

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Wed 11/3

22:45-16:35

1 stop12h 50m

Belfast City

Mon 16/3

17:45-19:45

1 stop31h 00m

£494

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Tue 10/3

14:10-16:50

2 stops21h 40m

Belfast City

Wed 18/3

06:30-15:20

1 stop13h 50m

£507

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Tue 10/3

15:50-16:50

2 stops20h 00m

Belfast City

Tue 17/3

17:20-15:20

1 stop27h 00m

£507

ChicagoBelfast

MDW - BHD

MDWBHD

Chicago Midway

Tue 10/3

17:59-16:50

2 stops17h 51m

Belfast City

Wed 18/3

06:30-18:34

2 stops17h 04m

£515

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Mon 16/3

22:45-14:15

1 stop10h 30m

Belfast City

Sun 22/3

20:25-14:50

1 stop23h 25m

£525

Flights are sorted by cheapest return flights first.

Deals found on 17/11

Showing 1-10 of 31 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 £473, British Airways can have you in Belfast from Illinois in 15h 21m. Airlines will cover a distance of 3893 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 Lambert-St Louis - 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.

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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