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Cheap flights from Illinois to Belfast from £237

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
8 Jun — 15 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 9 May 2026.

Fri 6/1118:30
ORD
-
BFS
3 stops21h 30m
Multiple Airlines
Sun 22/1122:00
BFS
-
ORD
3 stops25h 20m
Multiple Airlines
Deal found 6/5£631
Wed 11/1108:00
ORD
-
BHD
3 stops26h 35m
Multiple Airlines
Wed 18/1116:50
BHD
-
ORD
3 stops30h 30m
Multiple Airlines
Deal found 7/5£636
Wed 11/1121:45
ORD
-
BHD
1 stop10h 30m
British Airways
Wed 18/1106:35
BHD
-
ORD
1 stop13h 15m
British Airways
Deal found 7/5£640
Wed 11/1120:40
ORD
-
BHD
1 stop13h 55m
American Airlines
Wed 18/1109:15
BHD
-
ORD
1 stop12h 05m
American Airlines
Deal found 7/5£651
Tue 3/1117:10
ORD
-
BHD
1 stop11h 20m
British Airways
Mon 23/1117:45
BHD
-
ORD
1 stop26h 05m
British Airways
Deal found 6/5£653
Fri 6/1117:10
ORD
-
BHD
1 stop15h 05m
Multiple Airlines
Sun 22/1118:05
BHD
-
ORD
3 stops29h 15m
Multiple Airlines
Deal found 6/5£674
Thu 8/1021:15
ORD
-
BHD
1 stop12h 15m
British Airways
Mon 12/1018:30
BHD
-
ORD
1 stop25h 20m
British Airways
Deal found 6/5£686
Thu 5/1117:10
ORD
-
BHD
1 stop11h 10m
British Airways
Wed 25/1112:25
BHD
-
ORD
1 stop12h 20m
British Airways
Deal found 6/5£690
Sun 10/517:10
ORD
-
BFS
1 stop19h 15m
Multiple Airlines
Tue 26/520:15
BFS
-
ORD
2 stops32h 58m
Multiple Airlines
Deal found 8/5£730
Wed 17/609:55
ORD
-
BFS
2 stops27h 20m
Multiple Airlines
Wed 24/606:15
BFS
-
ORD
3 stops44h 01m
Multiple Airlines
Deal found 4/5£748
Fri 5/609:55
ORD
-
BFS
2 stops24h 35m
Multiple Airlines
Thu 11/621:10
BFS
-
ORD
3 stops29h 06m
Multiple Airlines
Deal found 7/5£792
Thu 5/1112:30
MDW
-
BHD
2 stops14h 40m
KLM
Mon 23/1117:20
BHD
-
MDW
2 stops29h 05m
KLM
Deal found 6/5£805

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 May 2026.

Round-trip from

£653

One-way from

£237
British Airways
  • British Airways
  • 3/11-23/11
  • 2 total stops
  • 37h 25m 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 9 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

Wed 4/11

17:10-10:15

1 stop11h 05m

Belfast City

Thu 19/11

11:05-18:45

1 stop13h 40m

£653
Fastest return journey

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Wed 4/11

21:45-14:15

1 stop10h 30m

Belfast City

Sun 22/11

12:10-18:45

1 stop12h 35m

£690

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Thu 8/10

17:00-10:10

1 stop11h 10m

Belfast City

Mon 12/10

19:35-16:13

2 stops26h 38m

£706

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Sun 12/7

17:00-10:30

1 stop11h 30m

Belfast City

Thu 20/8

09:35-18:15

1 stop14h 40m

£737

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Mon 13/7

19:17-16:55

2 stops15h 38m

Belfast City

Mon 24/8

17:30-14:15

1 stop26h 45m

£751

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Sun 12/7

16:20-09:20

1 stop11h 00m

Belfast City

Fri 21/8

09:50-22:24

2 stops18h 34m

£755

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Wed 17/6

09:55-19:15

2 stops27h 20m

Belfast Intl

Wed 24/6

07:30-22:05

2 stops20h 35m

£763

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Sun 2/8

21:15-17:40

1 stop14h 25m

Belfast City

Sat 15/8

07:05-15:55

1 stop14h 50m

£770

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Fri 5/6

09:55-16:30

2 stops24h 35m

Belfast Intl

Thu 11/6

21:10-20:16

3 stops29h 06m

£792

ChicagoBelfast

MDW - BHD

MDWBHD

Chicago Midway

Thu 5/11

12:30-09:10

2 stops14h 40m

Belfast City

Mon 23/11

17:20-16:25

2 stops29h 05m

£805

Flights are sorted by cheapest return flights first.

Deals found on 4/5

Showing 1-10 of 29 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 £653, 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 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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