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Cheap flights from Belfast to Illinois from £454

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 25/11. Fares are subject to change and may not be available on all flights or dates of travel.
BHD — ORD
28 Aug — 4 Sep1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Belfast to Illinois

Enter your travel dates to find the best prices.

Cheapest flights from Belfast to Illinois
Explore the most affordable flight options available from Belfast to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 29 July 2026.

Mon 21/920:55
BFS
-
ORD
2 stops28h 20m
Multiple Airlines
Wed 30/919:25
ORD
-
BFS
2 stops19h 45m
Multiple Airlines
Deal found 28/7£598
Mon 7/921:25
BFS
-
ORD
3 stops28h 23m
Multiple Airlines
Mon 14/919:25
ORD
-
BFS
2 stops19h 15m
Multiple Airlines
Deal found 26/7£637
Mon 21/911:35
BHD
-
ORD
1 stop12h 40m
British Airways
Wed 30/917:00
ORD
-
BHD
1 stop14h 35m
British Airways
Deal found 24/7£691
Mon 21/911:05
BHD
-
ORD
2 stops14h 10m
Multiple Airlines
Wed 30/915:45
ORD
-
BHD
2 stops17h 45m
Multiple Airlines
Deal found 24/7£694
Sun 23/806:45
BFS
-
ORD
3 stops43h 07m
Multiple Airlines
Sun 30/822:25
ORD
-
BFS
2 stops16h 35m
Multiple Airlines
Deal found 24/7£757
Sun 23/806:50
BHD
-
ORD
2 stops18h 25m
Aer Lingus
Sun 30/815:45
ORD
-
BHD
2 stops15h 25m
Aer Lingus
Deal found 24/7£784
Sun 23/807:00
BHD
-
ORD
3 stops21h 05m
Multiple Airlines
Sun 30/819:25
ORD
-
BHD
2 stops19h 40m
Multiple Airlines
Deal found 24/7£987
Sun 23/817:30
BHD
-
ORD
1 stop27h 00m
Virgin Atlantic
Sun 30/810:30
ORD
-
BHD
2 stops16h 50m
Virgin Atlantic
Deal found 24/7£993
Sun 23/817:30
BHD
-
ORD
1 stop27h 00m
KLM
Sun 30/816:20
ORD
-
BHD
1 stop11h 00m
KLM
Deal found 24/7£995

Find flight deals from Belfast to Illinois

Keep the following information in mind while searching for Belfast to Illinois flight deals. Data was last updated 29 July 2026.

Round-trip from

£598

One-way from

£454
21/9-30/9
  • 21/9-30/9
  • 4 total stops
  • 48h 05m total
  • Belfast to Illinois
Search Deals
British Airways
  • British Airways
  • 25/11
  • 1 total stop
  • 18h 10m total
  • Belfast to Illinois
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Belfast to Illinois 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 29 July 2026.
Use the filters below to find and compare flights from Belfast to Illinois that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

BelfastChicago

BFS - ORD

BFSORD

Belfast Intl

Mon 21/9

20:55-19:15

2 stops28h 20m

Chicago O'Hare Intl

Wed 30/9

19:25-21:10

2 stops19h 45m

£598

BelfastChicago

BFS - ORD

BFSORD

Belfast Intl

Mon 7/9

21:25-19:48

3 stops28h 23m

Chicago O'Hare Intl

Mon 14/9

19:25-20:40

2 stops19h 15m

£637

BelfastChicago

BHD - ORD

BHDORD

Belfast City

Mon 21/9

09:40-21:12

2 stops17h 32m

Chicago O'Hare Intl

Wed 30/9

16:01-13:35

2 stops15h 34m

£696

BelfastChicago

BFS - ORD

BFSORD

Belfast Intl

Sun 23/8

06:45-19:52

3 stops43h 07m

Chicago O'Hare Intl

Sun 30/8

22:25-21:00

2 stops16h 35m

£757

BelfastChicago

BHD - ORD

BHDORD

Belfast City

Sun 23/8

06:50-19:15

2 stops18h 25m

Chicago O'Hare Intl

Sun 30/8

15:45-13:10

2 stops15h 25m

£784
Fastest return journey

BelfastChicago

BHD - ORD

BHDORD

Belfast City

Fri 15/1

11:30-18:45

1 stop13h 15m

Chicago O'Hare Intl

Sun 17/1

13:31-10:20

2 stops14h 49m

£786
Cheapest one-way

BelfastChicago

BHD - ORD

BHDORD

Belfast City

Wed 25/11

06:35-18:45

1 stop18h 10m

£454
Fastest single journey

BelfastChicago

BHD - ORD

BHDORD

Belfast City

Wed 25/11

06:35-18:25

2 stops17h 50m

£463

BelfastChicago

BFS - ORD

BFSORD

Belfast Intl

Sat 15/8

06:55-16:40

2 stops39h 45m

£669

Flights are sorted by cheapest return flights first.

Deals found on 23/7

Sorted by cheapest first

Best time to book a flight from Belfast to Illinois

Have a flexible travel schedule? Discover the best time to fly to Illinois from Belfast 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 Belfast to Illinois

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 Belfast to Illinois. 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 Belfast to Illinois?

    Airlines like British Airways and Aer Lingus fly from Belfast to Illinois in about 17h 32m. The time it takes to get you to your destination can typically vary by up to 53m. The distance from Belfast to Illinois is about 3644 mi. This flight may include one or multiple stops.

  • Can I find deals for flights from Belfast to Illinois that include hotel bookings?

    Yes. In addition to deals on Belfast to Illinois flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Belfast to Illinois?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Belfast to Illinois.

  • Can I find deals for business class flights from Belfast to Illinois?

    Yes. Cheapflights offers flight deals from Belfast to Illinois 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 Belfast to Illinois?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Belfast to Illinois. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

Why should you use Cheapflights to find cheap flight tickets from Belfast to Illinois?

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Belfast to Illinois for you. Better yet — we are completely free to use.

Can Cheapflights find flights from Belfast to Illinois with no change fees?

Need flexible booking options for your flight to Illinois from Belfast? 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 Belfast to Illinois become cheaper?

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Illinois from Belfast today and book when prices fit your budget.

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