Find flights
When to book
FAQs

Cheap flights from Illinois to Belfast Intl Airport from £255

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 15/3. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — BFS
4 Mar — 11 Mar1
1 adult
1 adult, Economy, 0 bags

Cheap 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 2 February 2026.

Sun 1/318:30
ORD
-
BFS
2 stops20h 00m
Multiple Airlines
Sun 8/308:55
BFS
-
ORD
2 stops38h 25m
Multiple Airlines
Deal found 1/2£405
Sun 8/207:15
ORD
-
BFS
3 stops29h 40m
Multiple Airlines
Sun 15/223:05
BFS
-
ORD
2 stops23h 15m
Multiple Airlines
Deal found 31/1£524
Wed 18/310:55
ORD
-
BFS
3 stops23h 40m
Multiple Airlines
Wed 25/307:55
BFS
-
ORD
3 stops42h 05m
Multiple Airlines
Deal found 31/1£611
Sat 14/221:00
ORD
-
BFS
2 stops18h 40m
Multiple Airlines
Tue 17/206:30
BFS
-
ORD
2 stops18h 45m
Multiple Airlines
Deal found 1/2£623

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 2 February 2026.

Round-trip from

£405

One-way from

£255
1/3-8/3
  • 1/3-8/3
  • 4 total stops
  • 58h 25m total
  • Illinois to Belfast
Search Deals
15/3
  • 15/3
  • 2 total stops
  • 30h 30m 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 2 February 2026.
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 1/3

18:30-20:30

2 stops20h 00m

Belfast Intl

Sun 8/3

08:55-18:20

2 stops38h 25m

£405

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Wed 18/3

10:55-15:35

3 stops23h 40m

Belfast Intl

Wed 25/3

07:55-21:00

3 stops42h 05m

£611

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Sat 14/2

16:05-21:40

2 stops23h 35m

Belfast Intl

Tue 17/2

09:25-15:00

3 stops35h 35m

£727

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Sun 8/3

12:05-18:25

2 stops25h 20m

Belfast Intl

Mon 16/3

05:45-20:55

1 stop20h 10m

£800

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Thu 19/3

10:00-14:35

3 stops23h 35m

Belfast Intl

Thu 26/3

09:45-16:00

2 stops35h 15m

£827

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Sun 15/3

21:25-08:55

2 stops30h 30m

£255

ChicagoBelfast

MDW - BFS

MDWBFS

Chicago Midway

Sun 15/3

06:05-10:05

3 stops47h 00m

£275

Flights are sorted by cheapest return flights first.

Deals found on 2/2

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.
Newark to Belfast Intl flights
John F Kennedy Intl to Belfast Intl flights
John F Kennedy Intl to Belfast City flights
Hobby to Belfast City flights
LaGuardia to Belfast City flights
Seattle to Belfast City flights
Austin to Belfast Intl flights
George Bush Intcntl to Belfast Intl flights
Boston to Belfast Intl flights
Boston to Belfast City flights
O'Hare Intl to Belfast Intl flights
Dallas/Fort Worth to Belfast Intl flights
Atlanta to Belfast Intl flights
George Bush Intcntl to Belfast City flights
Los Angeles to Belfast Intl flights
San Francisco to Belfast Intl flights
Cleveland to Belfast Intl flights
Denver to Belfast Intl flights
Los Angeles to Belfast City flights
San Francisco to Belfast City flights
Nashville to Belfast City flights
Grand Rapids to Belfast City flights
Orlando to Belfast Intl flights
Minneapolis to Belfast Intl flights
Indianapolis to Belfast City flights
Raleigh to Belfast City 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.