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Cheap flights from Illinois to Belfast from £240

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 13/4. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — BHD
11 Mar — 18 Mar1
1 adult
1 adult, Economy, 0 bags

Cheap 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 9 February 2026.

Sun 11/1018:35
ORD
-
BHD
2 stops14h 00m
British Airways
Tue 20/1009:40
BHD
-
ORD
1 stop12h 15m
British Airways
Deal found 9/2£485
Wed 11/214:50
ORD
-
BHD
2 stops13h 25m
American Airlines
Wed 4/306:35
BHD
-
ORD
1 stop16h 25m
American Airlines
Deal found 6/2£486
Wed 11/218:25
ORD
-
BHD
1 stop18h 45m
American Airlines
Tue 17/206:35
BHD
-
ORD
1 stop14h 50m
American Airlines
Deal found 9/2£488
Wed 28/1013:00
STL
-
BHD
2 stops16h 15m
British Airways
Wed 25/1111:25
BHD
-
STL
2 stops18h 31m
British Airways
Deal found 9/2£505
Tue 10/220:45
ORD
-
BHD
1 stop14h 00m
American Airlines
Sun 15/206:30
BHD
-
ORD
1 stop16h 30m
American Airlines
Deal found 8/2£518
Thu 17/913:59
ORD
-
BHD
2 stops14h 11m
British Airways
Mon 28/919:35
BHD
-
ORD
2 stops27h 45m
British Airways
Deal found 9/2£524
Sun 20/919:05
ORD
-
BHD
1 stop13h 30m
British Airways
Sun 4/1020:10
BHD
-
ORD
1 stop25h 45m
British Airways
Deal found 6/2£524
Thu 12/218:30
ORD
-
BHD
1 stop13h 30m
American Airlines
Wed 18/206:35
BHD
-
ORD
2 stops16h 38m
American Airlines
Deal found 7/2£526
Tue 24/316:45
ORD
-
BFS
2 stops18h 15m
Multiple Airlines
Tue 31/307:35
BFS
-
ORD
2 stops17h 40m
Multiple Airlines
Deal found 7/2£531
Wed 29/419:16
MDW
-
BHD
2 stops15h 39m
Air Europa
Sun 3/509:50
BHD
-
MDW
2 stops18h 38m
Air Europa
Deal found 7/2£556
Sun 11/1014:20
ORD
-
BFS
2 stops25h 30m
Multiple Airlines
Tue 20/1006:45
BFS
-
ORD
3 stops37h 45m
Multiple Airlines
Deal found 9/2£571
Mon 23/317:20
ORD
-
BFS
3 stops21h 55m
Multiple Airlines
Mon 30/308:40
BFS
-
ORD
3 stops34h 40m
Multiple Airlines
Deal found 6/2£602

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 9 February 2026.

Round-trip from

£530

One-way from

£240
American Airlines
  • American Airlines
  • 29/4-3/5
  • 2 total stops
  • 26h 30m total
  • Illinois to Belfast
Search Deals
Aer Lingus
  • Aer Lingus
  • 13/4
  • 2 total stops
  • 14h 10m 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 9 February 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

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Wed 29/4

17:55-12:00

1 stop12h 05m

Belfast City

Sun 3/5

06:30-14:55

1 stop14h 25m

£530

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Tue 24/3

16:45-16:00

2 stops18h 15m

Belfast Intl

Tue 31/3

07:35-19:15

2 stops17h 40m

£531

ChicagoBelfast

MDW - BHD

MDWBHD

Chicago Midway

Wed 29/4

19:16-16:55

2 stops15h 39m

Belfast City

Sun 3/5

09:50-22:28

2 stops18h 38m

£556

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Wed 18/3

18:54-16:30

2 stops16h 36m

Belfast City

Sun 22/3

20:25-15:43

2 stops48h 18m

£562

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Wed 4/3

17:10-10:15

1 stop11h 05m

Belfast City

Sun 8/3

10:40-14:50

1 stop33h 10m

£586

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Mon 23/3

17:20-20:15

3 stops21h 55m

Belfast Intl

Mon 30/3

08:40-13:20

3 stops34h 40m

£602

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Wed 25/3

10:55-16:10

3 stops24h 15m

Belfast Intl

Wed 1/4

20:10-17:50

3 stops27h 40m

£622

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Fri 29/5

08:45-16:30

3 stops25h 45m

Belfast Intl

Tue 30/6

06:00-14:30

3 stops38h 30m

£744

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Thu 26/3

07:15-20:25

3 stops32h 10m

Belfast Intl

Thu 2/4

08:10-16:00

3 stops37h 50m

£758

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Wed 25/2

11:59-14:15

2 stops20h 16m

Belfast City

Sun 1/3

12:10-23:48

2 stops17h 38m

£799

Flights are sorted by cheapest return flights first.

Deals found on 5/2

Showing 1-10 of 19 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 £530, American Airlines can have you in Belfast from Illinois in 12h 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 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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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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