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Cheap flights from Belfast to Illinois from £325

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 24/9. Fares are subject to change and may not be available on all flights or dates of travel.
BHD — ORD
1 Sep — 8 Sep1
1 adult

Cheap flight deals from Belfast to Illinois

Keep the following information in mind while searching for Belfast to Illinois flight deals. Data was last updated 27 August 2025.

Round-trip from

£522

One-way from

£325

Popular in

August

Cheapest in

November

Average price

£888
American Airlines
  • American Airlines
  • 8/9-15/9
  • 2 total stops
  • 31h 10m total
  • Belfast to Illinois
Search Deals
24/9
  • 24/9
  • 3 total stops
  • 33h 30m total
  • Belfast to Illinois
Search Deals
Highest demand for flights based on searches. 2% potential increase in price (£13 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£17 potential savings vs. average return price).
Search Deals
Average for round-trip flights in August 2025
Search Deals

Find flight deals from Belfast to Illinois

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 27 August 2025.

Mon 8/906:40BHD - ORD
1 stop16h 20mAmerican Airlines
Mon 15/920:40ORD - BHD
1 stop14h 50mAmerican Airlines
Deal found 25/8£522
Wed 24/906:30BHD - ORD
1 stop14h 10mDelta
Tue 21/1013:25ORD - BHD
2 stops21h 30mDelta
Deal found 26/8£525
Mon 8/906:30BHD - ORD
1 stop14h 10mDelta
Mon 15/913:00ORD - BHD
2 stops21h 55mDelta
Deal found 25/8£527
Wed 24/910:00BHD - ORD
1 stop11h 55mBritish Airways
Tue 21/1016:55ORD - BHD
1 stop14h 05mBritish Airways
Deal found 26/8£530
Tue 16/906:30BHD - ORD
2 stops17h 15mKLM
Tue 14/1016:15ORD - BHD
1 stop18h 40mKLM
Deal found 25/8£531
Tue 16/906:30BHD - ORD
2 stops17h 15mDelta
Tue 14/1016:05ORD - BHD
2 stops23h 10mDelta
Deal found 25/8£540
Fri 26/907:35BFS - ORD
2 stops16h 40mMultiple Airlines
Thu 2/1019:25ORD - BFS
2 stops15h 15mMultiple Airlines
Deal found 25/8£570
Mon 8/906:40BFS - ORD
2 stops17h 35mMultiple Airlines
Mon 15/919:25ORD - BFS
2 stops15h 55mMultiple Airlines
Deal found 25/8£619
Tue 16/906:15BFS - ORD
3 stops33h 36mMultiple Airlines
Tue 14/1010:27ORD - BFS
3 stops26h 58mMultiple Airlines
Deal found 25/8£644
Wed 24/907:05BHD - ORD
3 stops34h 46mMultiple Airlines
Tue 21/1010:27ORD - BHD
3 stops27h 58mMultiple Airlines
Deal found 26/8£648
Thu 9/1010:15BFS - ORD
2 stops35h 55mMultiple Airlines
Thu 16/1018:00ORD - BFS
3 stops23h 25mMultiple Airlines
Deal found 25/8£698
Wed 24/910:00BHD - ORD
2 stops16h 43mIberia
Tue 21/1013:43ORD - BHD
2 stops14h 52mIberia
Deal found 26/8£701

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 27 August 2025.
Use the filters below to find and compare flights from Belfast to Illinois that are best for you.

Fly from

Belfast

Fly to

Illinois

Route

Depart

Return

Price

BelfastChicago

BHD - ORD

BHDORD

Belfast City

Mon 8/9

06:40-17:00

1 stop16h 20m

Chicago O'Hare Intl

Mon 15/9

20:40-17:30

1 stop14h 50m

£522

BelfastChicago

BHD - ORD

BHDORD

Belfast City

Wed 24/9

06:30-14:40

1 stop14h 10m

Chicago O'Hare Intl

Tue 21/10

13:25-16:55

2 stops21h 30m

£525

BelfastChicago

BHD - ORD

BHDORD

Belfast City

Tue 16/9

17:25-14:40

1 stop27h 15m

Chicago O'Hare Intl

Tue 14/10

16:15-16:55

1 stop18h 40m

£527

BelfastChicago

BHD - ORD

BHDORD

Belfast City

Mon 8/9

06:30-14:40

1 stop14h 10m

Chicago O'Hare Intl

Mon 15/9

13:00-16:55

2 stops21h 55m

£527

BelfastChicago

BHD - ORD

BHDORD

Belfast City

Wed 24/9

10:00-15:55

1 stop11h 55m

Chicago O'Hare Intl

Tue 21/10

12:52-13:00

2 stops18h 08m

£530

BelfastChicago

BHD - ORD

BHDORD

Belfast City

Tue 16/9

06:30-17:45

2 stops17h 15m

Chicago O'Hare Intl

Tue 14/10

16:05-21:15

2 stops23h 10m

£540

BelfastChicago

BFS - ORD

BFSORD

Belfast Intl

Fri 26/9

07:35-18:15

2 stops16h 40m

Chicago O'Hare Intl

Thu 2/10

19:25-16:40

2 stops15h 15m

£570

BelfastChicago

BFS - ORD

BFSORD

Belfast Intl

Mon 8/9

06:40-18:15

2 stops17h 35m

Chicago O'Hare Intl

Mon 15/9

19:25-17:20

2 stops15h 55m

£619

BelfastChicago

BFS - ORD

BFSORD

Belfast Intl

Tue 16/9

06:15-09:51

3 stops33h 36m

Chicago O'Hare Intl

Tue 14/10

10:27-19:25

3 stops26h 58m

£644

BelfastChicago

BHD - ORD

BHDORD

Belfast City

Wed 24/9

07:05-11:51

3 stops34h 46m

Chicago O'Hare Intl

Tue 21/10

10:27-20:25

3 stops27h 58m

£648

Flights are sorted by cheapest return flights first.

Deals found on 26/8

Showing 1-10 of 16 results
1
2

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.

Reviews of airlines servicing Illinois

Get insights into the airlines that provide service to Illinois. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Illinois. Reviews last updated 27 August 2025.
Read reviews from past customers who have flown with British Airways from Belfast to Illinois. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
British Airways
6.7
Okay
7,310 reviews
Check prices

Entertainment

6.4

Crew

7.6

Boarding

6.9

Food

6.3

Comfort

6.7

Overall

6.7

Reviews

1 / 20
6.0
Good

Anonymous,May 2025

LHR - LAX

We needed assistance (wheelchair, golf cart, whatever ) to get to next gate. We requested it. None was provided.
British Airways
6.7
Okay
7,310 reviews
British Airways
6.7
Okay
7,310 reviews
Check prices

Entertainment

6.4

Crew

7.6

Boarding

6.9

Food

6.3

Comfort

6.7

Overall

6.7

Reviews

1 / 20
6.0
Good

Anonymous,May 2025

LHR - LAX

We needed assistance (wheelchair, golf cart, whatever ) to get to next gate. We requested it. None was provided.

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 American Airlines, Delta, and KLM fly from Belfast to Illinois in about 14h 10m. The time it takes to get you to your destination can typically vary by up to 13h 05m. 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.

  • What is the cheapest month to book a flight from Belfast to Illinois?

    Currently, January is the cheapest month in which you can book a flight from Belfast to Illinois (average of £595). Flying from Belfast to Illinois in July is currently the most expensive (average of £843). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Top airline flying from Belfast to Illinois

Discover the top airline that operate flights from Belfast to Illinois. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 27 August 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest£482Average£619FlexibilityNo cancel feeOn-time70%
Search British Airways flights

Fly with Cheapflights

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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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