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Cheap flights from Illinois to Belfast from £176

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 30/8. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — BHD
13 Aug — 20 Aug1
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 14 July 2026.

Thu 1/1019:25
ORD
-
BHD
2 stops17h 15m
Multiple Airlines
Wed 7/1007:00
BHD
-
ORD
2 stops20h 25m
Multiple Airlines
Deal found 8/7£489
Thu 1/1019:25
ORD
-
BFS
2 stops17h 55m
Multiple Airlines
Wed 7/1008:15
BFS
-
ORD
2 stops19h 10m
Multiple Airlines
Deal found 8/7£500
Tue 1/1218:30
ORD
-
BFS
2 stops20h 25m
Multiple Airlines
Wed 9/1210:40
BFS
-
ORD
3 stops36h 40m
Multiple Airlines
Deal found 9/7£561
Mon 24/822:25
ORD
-
BFS
2 stops17h 50m
Multiple Airlines
Mon 31/806:40
BFS
-
ORD
3 stops33h 36m
Multiple Airlines
Deal found 10/7£570
Thu 5/1118:30
ORD
-
BFS
2 stops18h 40m
Multiple Airlines
Thu 12/1109:25
BFS
-
ORD
3 stops36h 05m
Multiple Airlines
Deal found 13/7£579
Wed 4/1118:30
ORD
-
BFS
2 stops21h 50m
Multiple Airlines
Tue 10/1108:25
BFS
-
ORD
3 stops37h 05m
Multiple Airlines
Deal found 13/7£581
Sun 23/819:25
ORD
-
BFS
2 stops20h 05m
Multiple Airlines
Sun 30/809:35
BFS
-
ORD
3 stops41h 45m
Multiple Airlines
Deal found 9/7£588
Fri 9/1019:25
ORD
-
BFS
2 stops19h 50m
Multiple Airlines
Fri 23/1017:30
BFS
-
ORD
3 stops30h 45m
Multiple Airlines
Deal found 9/7£594
Tue 1/922:25
ORD
-
BHD
2 stops13h 25m
Multiple Airlines
Sun 6/907:00
BHD
-
ORD
2 stops20h 25m
Multiple Airlines
Deal found 13/7£611
Wed 4/1121:50
ORD
-
BHD
1 stop10h 25m
Multiple Airlines
Tue 10/1112:05
BHD
-
ORD
3 stops33h 25m
Multiple Airlines
Deal found 13/7£621
Wed 26/809:50
ORD
-
BHD
2 stops20h 00m
Multiple Airlines
Wed 2/914:45
BHD
-
ORD
3 stops36h 35m
Multiple Airlines
Deal found 12/7£644
Thu 27/819:25
ORD
-
BHD
3 stops19h 25m
Multiple Airlines
Thu 3/911:50
BHD
-
ORD
3 stops39h 30m
Multiple Airlines
Deal found 13/7£646

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 14 July 2026.

Round-trip from

£489

One-way from

£176
1/10-7/10
  • 1/10-7/10
  • 4 total stops
  • 37h 40m total
  • Illinois to Belfast
Search Deals
30/8
  • 30/8
  • 3 total stops
  • 53h 40m 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 14 July 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

Cheapest return flight

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Thu 1/10

19:25-19:20

2 stops17h 55m

Belfast Intl

Wed 7/10

08:15-21:25

2 stops19h 10m

£500

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Wed 4/11

18:30-22:20

2 stops21h 50m

Belfast Intl

Tue 10/11

08:25-15:30

3 stops37h 05m

£581

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Sun 23/8

19:25-21:30

2 stops20h 05m

Belfast Intl

Sun 30/8

09:35-21:20

3 stops41h 45m

£588

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Thu 12/11

18:30-19:10

2 stops18h 40m

Belfast Intl

Sun 15/11

13:35-16:45

3 stops33h 10m

£601

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Thu 27/8

19:25-15:50

2 stops14h 25m

Belfast Intl

Thu 3/9

20:55-14:00

3 stops47h 05m

£606

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Wed 26/8

15:45-21:45

2 stops24h 00m

Belfast Intl

Wed 2/9

08:20-21:20

3 stops43h 00m

£614

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Mon 24/8

19:25-23:20

3 stops21h 55m

Belfast Intl

Mon 31/8

06:40-10:16

3 stops33h 36m

£616

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Sun 4/10

19:25-21:00

2 stops19h 35m

Belfast Intl

Fri 9/10

06:15-16:10

3 stops39h 55m

£617

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Wed 26/8

09:50-11:50

2 stops20h 00m

Belfast City

Wed 2/9

14:45-21:20

3 stops36h 35m

£644

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Tue 1/12

12:15-16:50

2 stops22h 35m

Belfast City

Wed 9/12

09:40-21:34

2 stops17h 54m

£686

Flights are sorted by cheapest return flights first.

Deals found on 8/7

Showing 1-10 of 44 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
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 £723, Virgin Atlantic can have you in Belfast from Illinois in 13h 55m. Airlines will cover a distance of 3647 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

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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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