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Cheap flights from Illinois to Belfast Intl Airport from £177

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 18/1. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — BFS
30 Nov — 7 Dec1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Illinois to Belfast Intl

Keep the following information in mind while searching for Illinois to Belfast Intl flight deals. Data was last updated 31 October 2025.

Round-trip from

£596

One-way from

£177
14/12-21/12
  • 14/12-21/12
  • 4 total stops
  • 34h 35m total
  • Illinois to Belfast
Search Deals
18/1
  • 18/1
  • 2 total stops
  • 40h 27m total
  • Illinois to Belfast
Search Deals

Find flight deals from Illinois to Belfast Intl

Enter your travel dates to find the best prices.

Cheapest flights from Illinois to Belfast Intl
Explore the most affordable flight options available from Illinois to Belfast Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 31 October 2025.

Sun 14/1218:30ORD - BFS
2 stops18h 25mMultiple Airlines
Sun 21/1207:10BFS - ORD
2 stops16h 10mMultiple Airlines
Deal found 30/10£596
Thu 6/1108:28ORD - BFS
3 stops31h 52mMultiple Airlines
Thu 13/1106:30BFS - ORD
2 stops22h 36mMultiple Airlines
Deal found 30/10£680

Cheapflights Fare Finder

 
Customise your flight search to find flights from Illinois to Belfast Intl 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 31 October 2025.
Use the filters below to find and compare flights from Illinois to Belfast Intl Airport that are best for you.

Fly from

Illinois

Fly to

Belfast Intl

Route

Depart

Return

Price

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Tue 17/2

10:15-12:20

3 stops20h 05m

Belfast Intl

Fri 20/2

06:30-19:15

2 stops18h 45m

£690

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Sun 14/12

07:10-17:55

3 stops28h 45m

Belfast Intl

Sun 21/12

23:05-17:55

2 stops24h 50m

£757

ChicagoBelfast

MDW - BFS

MDWBFS

Chicago Midway

Sun 18/1

21:43-20:10

2 stops40h 27m

£177

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Tue 2/12

15:53-22:50

2 stops48h 57m

£213

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Sun 18/1

05:05-10:05

3 stops23h 00m

£214

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Fri 5/12

18:30-09:10

3 stops56h 40m

£224

Flights are sorted by cheapest return flights first.

Deals found on 29/10

Best time to book a flight from Illinois to Belfast Intl

Have a flexible travel schedule? Discover the best time to fly to Belfast Intl 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 Intl Airport
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 Intl. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What are the most popular routes from Illinois to Belfast Intl Airport?

    While some choose either Chicago Midway - Belfast Intl or Lambert-St Louis - Belfast Intl, Chicago O'Hare Intl - Belfast Intl is the most popular route from Illinois to Belfast Intl Airport.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Illinois to Belfast Intl 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

Travelling to a place near Belfast Intl Airport?

Book flights to Belfast Intl Airport if you plan to visit one of these locations
Armagh
Newry
Ballymena
Cookstown
Dungannon

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Alternative routes for Illinois to Belfast Intl

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How does Cheapflights help users find flights from Illinois to Belfast Intl?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Illinois to Belfast Intl. 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 Illinois to Belfast Intl?

Millions of users choose and trust Cheapflights to book the best flight deals from Illinois to Belfast Intl for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

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

Yes! Cheapflights helps users easily find flights from Illinois to Belfast Intl with no change fees.

Can Cheapflights notify me if prices for flights from Illinois to Belfast Intl become cheaper?

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

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