Find flights
When to book
FAQs

Cheap flights from Illinois to Belfast Intl Airport from £239

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 15/1. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — BFS
27 Jan — 3 Feb1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Illinois to Belfast Intl

Enter your travel dates to find the best prices.

Best flights from Illinois to Belfast Intl
Discover carefully curated flight deals from Illinois to Belfast Intl that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 28 December 2025.

Sun 18/118:30ORD - BFS
3 stops21h 25mMultiple Airlines
Sun 25/107:55BFS - ORD
3 stops30h 23mMultiple Airlines
Deal found 26/12£554
Tue 10/217:20ORD - BFS
2 stops20h 55mMultiple Airlines
Tue 17/205:45BFS - ORD
3 stops17h 35mMultiple Airlines
Deal found 27/12£576
Sun 8/316:45ORD - BFS
1 stop15h 10mMultiple Airlines
Sun 22/320:55BFS - ORD
1 stop20h 20mMultiple Airlines
Deal found 27/12£634

Find 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 28 December 2025.

Round-trip from

£554

One-way from

£239
18/1-25/1
  • 18/1-25/1
  • 6 total stops
  • 51h 48m total
  • Illinois to Belfast
Search Deals
15/1
  • 15/1
  • 3 total stops
  • 33h 35m total
  • Illinois to Belfast
Search Deals

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 28 December 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

Sun 18/1

18:30-21:55

3 stops21h 25m

Belfast Intl

Sun 25/1

07:55-08:18

3 stops30h 23m

£554

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Tue 10/2

17:20-20:15

2 stops20h 55m

Belfast Intl

Tue 17/2

05:45-17:20

3 stops17h 35m

£576

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Sun 8/3

16:45-12:55

1 stop15h 10m

Belfast Intl

Sun 22/3

20:55-12:15

1 stop20h 20m

£634

ChicagoBelfast

MDW - BFS

MDWBFS

Chicago Midway

Thu 15/1

18:30-10:05

3 stops33h 35m

£239

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Thu 15/1

21:50-15:10

2 stops35h 20m

£241

Flights are sorted by cheapest return flights first.

Deals found on 27/12

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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Illinois to Belfast Intl

See prices for flight routes from nearby airports that may be better suited for you.
John F Kennedy Intl to Belfast Intl flights
John F Kennedy Intl to Belfast City flights
Newark to Belfast Intl flights
LaGuardia to Belfast City flights
Seattle to Belfast City flights
Dallas/Fort Worth to Belfast Intl flights
Boston to Belfast Intl flights
Hobby to Belfast City flights
O'Hare Intl to Belfast Intl flights
Boston to Belfast City flights
Los Angeles to Belfast Intl flights
Philadelphia to Belfast City flights
Los Angeles to Belfast City flights
George Bush Intcntl to Belfast City flights
George Bush Intcntl to Belfast Intl flights
Atlanta to Belfast Intl flights
Orlando to Belfast Intl flights
Denver to Belfast Intl flights
Denver to Belfast City flights
Minneapolis to Belfast City flights
Minneapolis to Belfast Intl flights
Orlando to Belfast City flights
San Francisco to Belfast Intl flights
State College to Belfast Intl flights
Austin to Belfast Intl flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

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.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.