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Cheap flights from Illinois to Belfast from £236

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 12/9. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — BHD
22 Jul — 29 Jul1
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 22 June 2026.

Wed 7/1019:25
ORD
-
BFS
2 stops19h 45m
Multiple Airlines
Wed 21/1021:05
BFS
-
ORD
3 stops27h 10m
Multiple Airlines
Deal found 19/6£611
Sun 13/917:35
ORD
-
BFS
2 stops19h 15m
Multiple Airlines
Mon 21/921:35
BFS
-
ORD
2 stops25h 23m
Multiple Airlines
Deal found 19/6£637
Sun 5/709:50
ORD
-
BFS
2 stops31h 00m
Multiple Airlines
Tue 28/722:45
BFS
-
ORD
2 stops24h 12m
Multiple Airlines
Deal found 17/6£648
Wed 4/1118:30
ORD
-
BFS
3 stops20h 15m
Multiple Airlines
Wed 18/1107:55
BFS
-
ORD
3 stops40h 30m
Multiple Airlines
Deal found 19/6£654
Wed 7/1017:00
ORD
-
BHD
1 stop14h 35m
British Airways
Wed 21/1006:30
BHD
-
ORD
1 stop15h 25m
British Airways
Deal found 19/6£655
Sun 1/1121:50
ORD
-
BHD
1 stop13h 00m
British Airways
Thu 19/1120:00
BHD
-
ORD
1 stop23h 50m
British Airways
Deal found 19/6£668
Wed 4/1115:08
ORD
-
BHD
2 stops13h 07m
American Airlines
Wed 18/1106:35
BHD
-
ORD
1 stop18h 40m
American Airlines
Deal found 19/6£670
Wed 4/1111:48
ORD
-
BHD
2 stops16h 27m
British Airways
Wed 18/1109:15
BHD
-
ORD
2 stops16h 05m
British Airways
Deal found 19/6£678
Tue 3/1116:06
ORD
-
BHD
2 stops13h 24m
British Airways
Wed 18/1111:25
BHD
-
ORD
1 stop13h 50m
British Airways
Deal found 19/6£681
Sun 4/1016:20
ORD
-
BHD
1 stop11h 00m
Delta
Mon 19/1017:30
BHD
-
ORD
1 stop26h 45m
Delta
Deal found 19/6£683
Sun 1/1115:50
ORD
-
BHD
2 stops19h 00m
Delta
Wed 18/1117:20
BHD
-
ORD
1 stop27h 05m
Delta
Deal found 19/6£686
Sun 13/909:50
ORD
-
BHD
2 stops23h 05m
Multiple Airlines
Mon 21/907:00
BHD
-
ORD
2 stops18h 15m
Multiple Airlines
Deal found 19/6£689

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 22 June 2026.

Round-trip from

£611

One-way from

£236
7/10-21/10
  • 7/10-21/10
  • 5 total stops
  • 46h 55m total
  • Illinois to Belfast
Search Deals
12/9
  • 12/9
  • 2 total stops
  • 18h 15m 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 22 June 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 - BFS

ORDBFS

Chicago O'Hare Intl

Wed 7/10

19:25-21:10

2 stops19h 45m

Belfast Intl

Wed 21/10

21:05-18:15

3 stops27h 10m

£611

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Sun 5/7

09:50-22:50

2 stops31h 00m

Belfast Intl

Tue 28/7

22:45-16:57

2 stops24h 12m

£648

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Wed 4/11

18:30-19:20

2 stops18h 50m

Belfast Intl

Wed 18/11

07:55-18:25

3 stops40h 30m

£654

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Mon 5/10

19:05-12:55

1 stop11h 50m

Belfast City

Sun 18/10

20:10-13:50

1 stop23h 40m

£706

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Mon 2/11

21:50-18:35

1 stop14h 45m

Belfast City

Sun 8/11

06:30-18:45

1 stop18h 15m

£715

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Sat 10/10

16:20-09:15

1 stop10h 55m

Belfast City

Mon 19/10

17:30-14:15

1 stop26h 45m

£721

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Tue 6/10

16:20-09:20

1 stop11h 00m

Belfast City

Sat 24/10

17:30-15:25

1 stop27h 55m

£721

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Thu 8/10

16:20-09:20

1 stop11h 00m

Belfast City

Mon 19/10

17:30-14:15

1 stop26h 45m

£721

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Mon 24/8

12:29-09:20

2 stops14h 51m

Belfast City

Mon 31/8

17:30-14:15

1 stop26h 45m

£727

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Fri 14/8

21:15-15:30

1 stop12h 15m

Belfast City

Thu 20/8

06:30-15:55

1 stop15h 25m

£728

Flights are sorted by cheapest return flights first.

Deals found on 19/6

Showing 1-10 of 41 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 £721, British Airways can have you in Belfast from Illinois in 10h 55m. 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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