Find flights
When to book
FAQs

Cheap flights from Illinois to Belfast from £182

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 7/3. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — BHD
21 Feb — 28 Feb1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Illinois to Belfast

Enter your travel dates to find the best prices.

Cheapest flights from Illinois to Belfast
Explore the most affordable flight options available from Illinois to Belfast. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 22 January 2026.

Fri 20/215:39
ORD
-
BHD
2 stops16h 36m
British Airways
Fri 27/206:45
BHD
-
ORD
1 stop13h 05m
British Airways
Deal found 21/1£462
Thu 19/221:45
ORD
-
BHD
1 stop12h 55m
British Airways
Thu 26/211:05
BHD
-
ORD
1 stop13h 40m
British Airways
Deal found 21/1£464
Wed 4/317:10
ORD
-
BHD
1 stop11h 05m
British Airways
Sun 8/312:10
BHD
-
ORD
1 stop31h 40m
British Airways
Deal found 20/1£466
Thu 19/214:40
ORD
-
BHD
2 stops13h 40m
American Airlines
Thu 26/206:35
BHD
-
ORD
1 stop14h 50m
American Airlines
Deal found 21/1£468
Wed 25/211:59
STL
-
BHD
2 stops16h 16m
British Airways
Sun 1/320:25
BHD
-
STL
2 stops33h 23m
British Airways
Deal found 20/1£476
Thu 19/221:00
ORD
-
BFS
2 stops17h 25m
Multiple Airlines
Thu 26/206:30
BFS
-
ORD
3 stops31h 24m
Multiple Airlines
Deal found 21/1£485
Wed 18/322:45
ORD
-
BHD
1 stop10h 30m
British Airways
Sun 22/320:25
BHD
-
ORD
2 stops45h 00m
British Airways
Deal found 21/1£517
Thu 19/213:26
MDW
-
BHD
2 stops21h 24m
Delta
Thu 26/206:30
BHD
-
MDW
2 stops18h 10m
Delta
Deal found 21/1£545
Fri 6/307:15
ORD
-
BFS
3 stops25h 55m
Multiple Airlines
Fri 13/314:30
BFS
-
ORD
3 stops35h 50m
Multiple Airlines
Deal found 19/1£560
Fri 20/218:40
MDW
-
BHD
2 stops16h 10m
KLM
Fri 27/206:30
BHD
-
MDW
2 stops17h 07m
KLM
Deal found 21/1£776
Sat 24/115:54
STL
-
BHD
2 stops18h 51m
British Airways
Mon 26/117:45
BHD
-
STL
2 stops33h 30m
British Airways
Deal found 20/1£893
Mon 27/713:05
MDW
-
BHD
2 stops21h 50m
Scandinavian Airlines
Fri 7/809:50
BHD
-
MDW
2 stops17h 56m
Scandinavian Airlines
Deal found 21/1£1,105

Find flight deals from Illinois to Belfast

Keep the following information in mind while searching for Illinois to Belfast flight deals. Data was last updated 22 January 2026.

Round-trip from

£462

One-way from

£182
British Airways
  • British Airways
  • 20/2-27/2
  • 3 total stops
  • 29h 41m total
  • Illinois to Belfast
Search Deals
7/3
  • 7/3
  • 2 total stops
  • 45h 57m total
  • Illinois to Belfast
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Illinois to Belfast 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 22 January 2026.
Use the filters below to find and compare flights from Illinois to Belfast that are best for you.

Fly from

Illinois

Fly to

Belfast

Route

Depart

Return

Price

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Thu 19/2

21:45-16:40

1 stop12h 55m

Belfast City

Thu 26/2

11:05-18:45

1 stop13h 40m

£464

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Fri 20/2

17:10-10:30

1 stop11h 20m

Belfast City

Fri 27/2

06:45-13:50

1 stop13h 05m

£464

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Wed 4/3

17:10-10:15

1 stop11h 05m

Belfast City

Sun 8/3

12:10-19:45

1 stop12h 35m

£466

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Thu 19/2

14:40-10:20

2 stops13h 40m

Belfast City

Thu 26/2

06:35-15:25

1 stop14h 50m

£468

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Wed 18/3

18:54-14:15

2 stops14h 21m

Belfast City

Sun 22/3

20:25-12:25

2 stops45h 00m

£468

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Wed 25/2

11:59-10:15

2 stops16h 16m

Belfast City

Sun 1/3

20:25-23:48

2 stops33h 23m

£476

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Thu 19/2

21:00-20:25

2 stops17h 25m

Belfast Intl

Thu 26/2

06:30-07:54

3 stops31h 24m

£485

ChicagoBelfast

MDW - BHD

MDWBHD

Chicago Midway

Thu 19/2

13:26-16:50

2 stops21h 24m

Belfast City

Thu 26/2

06:30-18:40

2 stops18h 10m

£545

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Fri 6/3

07:15-15:10

3 stops25h 55m

Belfast Intl

Fri 13/3

14:30-21:20

3 stops35h 50m

£560

ChicagoBelfast

MDW - BHD

MDWBHD

Chicago Midway

Fri 20/2

18:40-16:50

2 stops16h 10m

Belfast City

Fri 27/2

06:30-17:37

2 stops17h 07m

£776

Flights are sorted by cheapest return flights first.

Deals found on 21/1

Showing 1-10 of 26 results
1
2
3

Best time to book a flight from Illinois to Belfast

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

  • How long is the flight from Illinois to Belfast?

    For as low as £464, British Airways can have you in Belfast from Illinois in 12h 55m. Airlines will cover a distance of 3644 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

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

    The most popular route from Illinois to Belfast is Chicago O'Hare Intl - Belfast Intl. You may also consider Chicago O'Hare Intl - Belfast City or Chicago Midway - Belfast City.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Illinois to Belfast 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

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

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
Atlanta to Belfast Intl flights
Boston to Belfast Intl flights
San Francisco to Belfast City flights
Boston to Belfast City flights
Hobby to Belfast City flights
Denver to Belfast Intl flights
Dallas/Fort Worth to Belfast Intl flights
Portland to Belfast Intl flights
Denver to Belfast City flights
Philadelphia to Belfast City flights
Los Angeles to Belfast Intl flights
Orlando to Belfast Intl flights
Portland to Belfast City flights
George Bush Intcntl to Belfast City flights
O'Hare Intl to Belfast Intl flights
State College to Belfast City flights
Tampa to Belfast Intl flights
Grand Rapids to Belfast City flights
Indianapolis to Belfast City flights
Orlando to Belfast City flights
Minneapolis to Belfast City flights
Los Angeles to Belfast City flights
Tampa 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?

Deals for Illinois to Belfast flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

Why should you use Cheapflights to find cheap flight tickets from Illinois to Belfast?

Cheapflights helps you find that perfect flight to Belfast from Illinois by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

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

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

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

Yes! Start tracking prices for Illinois to Belfast flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

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.