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Cheap flights from Belfast Intl Airport to Illinois from £278

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 10/1. Fares are subject to change and may not be available on all flights or dates of travel.
BFS — ORD
24 Nov — 1 Dec1
1 adult
1 adult, Economy, 0 bags

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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 25 October 2025.

Sun 7/1206:00BFS - ORD
2 stops17h 55mMultiple Airlines
Sun 14/1219:40ORD - BFS
2 stops20h 30mMultiple Airlines
Deal found 23/10£670

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 25 October 2025.

Round-trip from

£670

One-way from

£278
7/12-14/12
  • 7/12-14/12
  • 4 total stops
  • 38h 25m total
  • Belfast to Illinois
Search Deals
10/1
  • 10/1
  • 2 total stops
  • 52h 13m total
  • Belfast to Illinois
Search Deals

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 25 October 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

Sun 7/12

06:00-17:55

2 stops17h 55m

Chicago O'Hare Intl

Sun 14/12

19:40-22:10

2 stops20h 30m

£670

BelfastChicago

BFS - ORD

BFSORD

Belfast Intl

Sat 10/1

23:10-21:23

2 stops52h 13m

£278

Flights are sorted by cheapest return flights first.

Deals found on 23/10

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 25 October 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
7,472 reviews
Check prices

Comfort

6.7

Food

6.3

Boarding

6.9

Crew

7.6

Overall

6.7

Entertainment

6.4

Reviews

1 / 20
6.0
Good

Roxanne,Sept 2025

LHR - IAD

Food was mediocre. Couldn't use headphones because no information on how to use. Staff paid so much attention on a family with a baby . They got VIP treatment.
British Airways
6.7
Okay
7,472 reviews
British Airways
6.7
Okay
7,472 reviews
Check prices

Comfort

6.7

Food

6.3

Boarding

6.9

Crew

7.6

Overall

6.7

Entertainment

6.4

Reviews

1 / 20
6.0
Good

Roxanne,Sept 2025

LHR - IAD

Food was mediocre. Couldn't use headphones because no information on how to use. Staff paid so much attention on a family with a baby . They got VIP treatment.

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.

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Alternative routes for Belfast Intl to Illinois

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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 25 October 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest£488Average£580FlexibilityNo cancel feeOn-time70%
Search British Airways flights

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