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Cheap flights from Belfast Intl Airport to Illinois from £570

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 26/9. Fares are subject to change and may not be available on all flights or dates of travel.
BFS — ORD
1 Sep — 8 Sep1
1 adult

Cheap flight deals from Belfast Intl to Illinois

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

Round-trip from

£570

Popular in

August

Cheapest in

November

Average price

£888
26/9-2/10
  • 26/9-2/10
  • 4 total stops
  • 31h 55m 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 Intl to Illinois

Cheapest flights from Belfast Intl to Illinois
Explore the most affordable flight options available from Belfast Intl to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 27 August 2025.

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
Thu 9/1010:15BFS - ORD
2 stops35h 55mMultiple Airlines
Thu 16/1018:00ORD - BFS
3 stops23h 25mMultiple Airlines
Deal found 25/8£698
Fri 10/1006:35BFS - ORD
3 stops31h 43mMultiple Airlines
Fri 17/1018:00ORD - BFS
2 stops16h 00mMultiple Airlines
Deal found 26/8£761

Cheapflights Fare Finder

 
Customise your flight search to find flights from Belfast Intl 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 Intl Airport to Illinois that are best for you.

Fly from

Belfast Intl

Fly to

Illinois

Route

Depart

Return

Price

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

BFS - ORD

BFSORD

Belfast Intl

Thu 9/10

10:15-16:10

2 stops35h 55m

Chicago O'Hare Intl

Thu 16/10

18:00-23:25

3 stops23h 25m

£698

BelfastChicago

BFS - ORD

BFSORD

Belfast Intl

Fri 10/10

06:35-08:18

3 stops31h 43m

Chicago O'Hare Intl

Fri 17/10

18:00-16:00

2 stops16h 00m

£761

Flights are sorted by cheapest return flights first.

Deals found on 25/8

Best time to book a flight from Belfast Intl to Illinois

Have a flexible travel schedule? Discover the best time to fly to Illinois from Belfast Intl 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 Intl Airport 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.
Get a feel of what it's like to fly with British Airways from Belfast Intl Airport to Illinois by reading reviews from past customers. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
British Airways
6.7
Okay
7,310 reviews
Check prices

Overall

6.7

Crew

7.6

Boarding

6.9

Food

6.3

Comfort

6.7

Entertainment

6.4

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

Overall

6.7

Crew

7.6

Boarding

6.9

Food

6.3

Comfort

6.7

Entertainment

6.4

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 Intl to Illinois. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

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

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

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

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

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

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

    Currently, January is the cheapest month in which you can book a flight from Belfast Intl Airport to Illinois (average of £595). Flying from Belfast Intl Airport 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 Intl to Illinois

Discover the top airline that operate flights from Belfast Intl 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£587FlexibilityNo cancel feeOn-time70%
Search British Airways flights

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Need flexible booking options for your flight to Illinois from Belfast Intl? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

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