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Cheap flights from Illinois to Belfast from £242

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 8/9. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — BHD
17 Jun — 24 Jun1
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 18 May 2026.

Tue 10/1121:45
ORD
-
BHD
1 stop11h 05m
British Airways
Fri 13/1106:45
BHD
-
ORD
1 stop18h 00m
British Airways
Deal found 16/5£665
Wed 10/608:50
ORD
-
BFS
2 stops28h 25m
Multiple Airlines
Mon 15/621:55
BFS
-
ORD
3 stops37h 57m
Multiple Airlines
Deal found 13/5£674
Thu 8/1017:00
ORD
-
BHD
1 stop11h 10m
British Airways
Mon 12/1018:30
BHD
-
ORD
1 stop27h 25m
British Airways
Deal found 17/5£699
Thu 11/608:52
ORD
-
BFS
3 stops28h 03m
Multiple Airlines
Tue 16/621:15
BFS
-
ORD
2 stops28h 10m
Multiple Airlines
Deal found 17/5£700
Fri 12/616:37
ORD
-
BFS
2 stops17h 53m
Multiple Airlines
Mon 15/621:55
BFS
-
ORD
3 stops43h 26m
Multiple Airlines
Deal found 15/5£719
Wed 9/1218:10
ORD
-
BHD
2 stops16h 40m
Virgin Atlantic
Wed 6/117:20
BHD
-
ORD
1 stop27h 05m
Virgin Atlantic
Deal found 17/5£723
Thu 11/616:37
ORD
-
BFS
2 stops20h 18m
Multiple Airlines
Thu 18/606:10
BFS
-
ORD
3 stops45h 55m
Multiple Airlines
Deal found 13/5£731
Wed 9/1217:10
ORD
-
BHD
1 stop15h 05m
British Airways
Wed 6/119:25
BHD
-
ORD
1 stop24h 25m
British Airways
Deal found 17/5£750
Tue 21/716:20
ORD
-
BHD
1 stop18h 35m
Delta
Tue 11/817:30
BHD
-
ORD
1 stop27h 00m
Delta
Deal found 14/5£763
Fri 5/615:45
ORD
-
BFS
2 stops18h 45m
Multiple Airlines
Thu 11/621:10
BFS
-
ORD
3 stops38h 42m
Multiple Airlines
Deal found 13/5£779
Wed 22/712:41
MDW
-
BHD
2 stops14h 39m
KLM
Fri 7/809:50
BHD
-
MDW
2 stops18h 46m
KLM
Deal found 14/5£804
Tue 7/709:50
ORD
-
BFS
2 stops30h 25m
Multiple Airlines
Mon 20/706:30
BFS
-
ORD
2 stops21h 35m
Multiple Airlines
Deal found 15/5£825

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 18 May 2026.

Round-trip from

£665

One-way from

£242
British Airways
  • British Airways
  • 10/11-13/11
  • 2 total stops
  • 29h 05m total
  • Illinois to Belfast
Search Deals
British Airways
  • British Airways
  • 8/9
  • 1 total stop
  • 11h 45m 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 18 May 2026.
Use the filters below to find and compare flights from Illinois to Belfast that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Tue 10/11

21:45-14:50

1 stop11h 05m

Belfast City

Fri 13/11

06:45-18:45

1 stop18h 00m

£665

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Thu 8/10

17:00-10:10

1 stop11h 10m

Belfast City

Mon 12/10

18:30-15:55

1 stop27h 25m

£699

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Thu 11/6

09:55-18:55

2 stops27h 00m

Belfast Intl

Tue 16/6

21:15-19:25

2 stops28h 10m

£726

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Thu 11/6

16:37-18:55

2 stops20h 18m

Belfast Intl

Thu 18/6

06:10-22:05

3 stops45h 55m

£731

ChicagoBelfast

MDW - BHD

MDWBHD

Chicago Midway

Wed 22/7

12:41-09:20

2 stops14h 39m

Belfast City

Fri 7/8

09:50-22:36

2 stops18h 46m

£804

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Tue 7/7

09:50-22:15

2 stops30h 25m

Belfast Intl

Mon 20/7

06:30-22:05

2 stops21h 35m

£825

St. LouisBelfast

STL - BFS

STLBFS

Lambert-St Louis

Tue 9/6

08:40-19:50

2 stops29h 10m

Belfast Intl

Fri 19/6

21:05-12:21

3 stops45h 16m

£837

ChicagoBelfast

MDW - BHD

MDWBHD

Chicago Midway

Thu 23/7

18:58-16:55

2 stops15h 57m

Belfast City

Fri 7/8

09:50-22:36

2 stops18h 46m

£892

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Sat 27/6

17:35-20:40

2 stops21h 05m

Belfast Intl

Sat 4/7

07:40-11:50

2 stops34h 10m

£895

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Mon 22/6

07:10-22:25

3 stops33h 15m

Belfast Intl

Mon 29/6

06:30-16:57

2 stops16h 27m

£896

Flights are sorted by cheapest return flights first.

Deals found on 17/5

Showing 1-10 of 33 resultsSorted by cheapest first
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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 £665, 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 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?

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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