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Cheap flights from Illinois to Belfast from £206

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 23/8. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — BHD
1 Apr — 8 Apr1
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 2 March 2026.

Mon 13/419:25
ORD
-
BFS
2 stops19h 30m
Multiple Airlines
Tue 28/407:00
BFS
-
ORD
3 stops17h 15m
Multiple Airlines
Deal found 27/2£485
Mon 13/416:50
ORD
-
BHD
1 stop10h 30m
Virgin Atlantic
Tue 28/417:30
BHD
-
ORD
1 stop27h 00m
Virgin Atlantic
Deal found 26/2£490
Tue 3/320:35
ORD
-
BHD
1 stop12h 15m
American Airlines
Tue 10/306:35
BHD
-
ORD
1 stop14h 50m
American Airlines
Deal found 2/3£501
Sun 20/917:50
ORD
-
BHD
1 stop14h 45m
American Airlines
Wed 30/906:30
BHD
-
ORD
1 stop12h 00m
American Airlines
Deal found 28/2£506
Mon 13/419:05
ORD
-
BHD
1 stop14h 25m
British Airways
Tue 28/420:25
BHD
-
ORD
1 stop25h 30m
British Airways
Deal found 27/2£508
Sun 8/317:25
ORD
-
BHD
1 stop22h 35m
Delta
Wed 18/306:30
BHD
-
ORD
1 stop13h 50m
Delta
Deal found 1/3£518
Mon 9/314:10
ORD
-
BHD
2 stops21h 35m
Delta
Wed 18/306:30
BHD
-
ORD
1 stop13h 50m
Delta
Deal found 1/3£521
Sun 8/317:25
ORD
-
BHD
1 stop22h 35m
Delta
Mon 16/317:20
BHD
-
ORD
2 stops28h 23m
Delta
Deal found 1/3£525
Mon 13/419:25
ORD
-
BHD
2 stops15h 25m
Multiple Airlines
Tue 28/417:20
BHD
-
ORD
3 stops28h 40m
Multiple Airlines
Deal found 27/2£526
Mon 14/916:51
ORD
-
BHD
2 stops18h 39m
British Airways
Mon 28/919:35
BHD
-
ORD
2 stops27h 45m
British Airways
Deal found 1/3£527
Tue 10/313:10
MDW
-
BHD
2 stops22h 40m
Delta
Mon 16/317:20
BHD
-
MDW
2 stops29h 34m
Delta
Deal found 1/3£529
Wed 15/419:25
ORD
-
BFS
2 stops19h 15m
Multiple Airlines
Wed 22/408:15
BFS
-
ORD
2 stops40h 00m
Multiple Airlines
Deal found 1/3£532

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 2 March 2026.

Round-trip from

£485

One-way from

£206
13/4-28/4
  • 13/4-28/4
  • 5 total stops
  • 36h 45m total
  • Illinois to Belfast
Search Deals
23/8
  • 23/8
  • 2 total stops
  • 23h 45m 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 2 March 2026.
Use the filters below to find and compare flights from Illinois to Belfast that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Mon 13/4

19:25-20:55

2 stops19h 30m

Belfast Intl

Tue 28/4

07:00-18:15

3 stops17h 15m

£485

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Wed 15/4

19:25-20:40

2 stops19h 15m

Belfast Intl

Wed 22/4

08:15-18:15

2 stops40h 00m

£532

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Mon 13/4

19:25-16:50

2 stops15h 25m

Belfast City

Tue 28/4

17:20-16:00

3 stops28h 40m

£561

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Mon 13/4

11:00-09:20

2 stops16h 20m

Belfast City

Tue 28/4

17:30-14:30

1 stop27h 00m

£577

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Mon 4/5

11:08-09:20

2 stops16h 12m

Belfast City

Sun 17/5

09:50-21:25

2 stops17h 35m

£598

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Mon 4/5

19:25-23:20

3 stops21h 55m

Belfast Intl

Sun 17/5

09:55-21:25

2 stops17h 30m

£655

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Sat 18/4

11:25-22:40

2 stops29h 15m

Belfast Intl

Mon 20/4

06:10-09:40

2 stops33h 30m

£662

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Thu 19/3

16:21-14:00

2 stops16h 39m

Belfast City

Thu 26/3

09:05-21:30

2 stops17h 25m

£673

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Wed 18/3

17:25-16:50

1 stop18h 25m

Belfast City

Sun 22/3

17:20-15:20

1 stop27h 00m

£741

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Wed 18/3

15:16-14:15

2 stops17h 59m

Belfast City

Sun 22/3

20:25-12:25

2 stops45h 00m

£759

Flights are sorted by cheapest return flights first.

Deals found on 2/3

Showing 1-10 of 28 resultsSorted by cheapest first
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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

How much does it cost for a return flight from Illinois to Belfast?

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 £577, KLM can have you in Belfast from Illinois in 16h 20m. 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 Intl.

  • 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

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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.

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