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Cheap flights from Chicago to Belfast from £326

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 8/9. Fares are subject to change and may not be available on all flights or dates of travel.
CHI — BHD
20 Aug — 27 Aug1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Chicago to Belfast

Enter your travel dates to find the best prices.

Cheapest flights from Chicago to Belfast
Explore the most affordable flight options available from Chicago to Belfast. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 21 July 2026.

Tue 27/1019:30
ORD
-
BFS
2 stops20h 25m
Multiple Airlines
Mon 2/1122:05
BFS
-
ORD
3 stops47h 25m
Multiple Airlines
Deal found 18/7£597
Tue 1/1218:30
ORD
-
BFS
2 stops20h 25m
Multiple Airlines
Tue 8/1220:35
BFS
-
ORD
3 stops26h 45m
Multiple Airlines
Deal found 18/7£602
Tue 18/819:25
ORD
-
BFS
2 stops20h 50m
Multiple Airlines
Mon 24/821:50
BFS
-
ORD
2 stops30h 15m
Multiple Airlines
Deal found 21/7£626
Tue 25/819:25
ORD
-
BFS
2 stops20h 50m
Multiple Airlines
Wed 2/909:35
BFS
-
ORD
2 stops33h 05m
Multiple Airlines
Deal found 20/7£629
Wed 2/919:25
ORD
-
BFS
2 stops19h 45m
Multiple Airlines
Wed 9/910:50
BFS
-
ORD
3 stops40h 30m
Multiple Airlines
Deal found 19/7£647
Tue 1/1217:10
ORD
-
BHD
1 stop12h 20m
British Airways
Tue 8/1206:35
BHD
-
ORD
1 stop13h 10m
British Airways
Deal found 18/7£648
Sun 6/1221:50
ORD
-
BHD
1 stop14h 50m
British Airways
Wed 9/1211:25
BHD
-
ORD
1 stop13h 20m
British Airways
Deal found 16/7£660
Tue 27/1022:50
ORD
-
BHD
1 stop12h 55m
British Airways
Mon 2/1119:25
BHD
-
ORD
1 stop29h 20m
British Airways
Deal found 18/7£671
Tue 27/1018:10
ORD
-
BHD
2 stops17h 40m
KLM
Mon 2/1117:20
BHD
-
ORD
2 stops29h 09m
KLM
Deal found 18/7£685
Tue 25/821:15
ORD
-
BHD
1 stop14h 20m
British Airways
Wed 2/911:35
BHD
-
ORD
1 stop12h 40m
British Airways
Deal found 20/7£686
Tue 25/819:25
ORD
-
BHD
3 stops19h 25m
Multiple Airlines
Wed 2/907:00
BHD
-
ORD
2 stops18h 52m
Multiple Airlines
Deal found 20/7£687
Mon 17/820:45
ORD
-
BHD
1 stop12h 45m
British Airways
Mon 24/819:35
BHD
-
ORD
1 stop24h 15m
British Airways
Deal found 18/7£699

Find flight deals from Chicago to Belfast

Discover tips and strategies to find the most affordable flight options for your journey from Chicago (CHI) to Belfast (BF1). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 21 July 2026.

Round-trip from

£597

One-way from

£326
27/10-2/11
  • 27/10-2/11
  • 5 total stops
  • 67h 50m total
  • Chicago to Belfast
Search Deals
British Airways
  • British Airways
  • 8/9
  • 2 total stops
  • 33h 27m total
  • Chicago to Belfast
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Chicago 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 21 July 2026.
Use the filters below to find and compare flights from Chicago 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

Tue 27/10

19:30-20:55

2 stops20h 25m

Belfast Intl

Mon 2/11

22:05-15:30

3 stops47h 25m

£597

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Tue 18/8

19:25-22:15

2 stops20h 50m

Belfast Intl

Mon 24/8

21:50-22:05

2 stops30h 15m

£626

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Tue 25/8

19:25-22:15

2 stops20h 50m

Belfast Intl

Wed 2/9

09:35-12:40

2 stops33h 05m

£629

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Wed 2/9

19:25-21:10

2 stops19h 45m

Belfast Intl

Wed 9/9

10:50-21:20

3 stops40h 30m

£647
Fastest return journey

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Sun 6/12

21:50-18:40

1 stop14h 50m

Belfast City

Wed 9/12

11:25-18:45

1 stop13h 20m

£662

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Tue 1/12

13:31-11:30

2 stops15h 59m

Belfast City

Tue 8/12

10:00-18:45

1 stop14h 45m

£665

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Tue 1/12

07:05-20:55

3 stops31h 50m

Belfast Intl

Tue 8/12

20:35-17:20

3 stops26h 45m

£665

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Tue 27/10

22:50-16:45

1 stop12h 55m

Belfast City

Mon 2/11

19:25-18:45

1 stop29h 20m

£671

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Mon 17/8

20:45-15:30

1 stop12h 45m

Belfast City

Mon 24/8

19:35-13:50

1 stop24h 15m

£699

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Tue 25/8

12:40-10:45

2 stops16h 05m

Belfast City

Wed 2/9

06:30-15:55

1 stop15h 25m

£705

Flights are sorted by cheapest return flights first.

Deals found on 19/7

Showing 1-10 of 22 resultsSorted by cheapest first
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Best time to book a flight from Chicago to Belfast

Have a flexible travel schedule? Discover the best time to fly to Belfast from Chicago 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 Chicago 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 Chicago 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 Chicago to Belfast?

    Departing from Chicago to Belfast will take you 14h 10m. There are 3647 mi between Chicago and Belfast. This flight may include one or multiple stops.

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

    The most popular route from Chicago 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 Chicago to Belfast that include hotel bookings?

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

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

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

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

    Yes. Cheapflights offers flight deals from Chicago 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

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Alternative routes for Chicago to Belfast

See prices for flight routes from nearby airports that may be better suited for you.
O'Hare Intl 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 Chicago to Belfast?

Cheapflights helps you search for flights from Chicago to Belfast via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

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

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Chicago to Belfast for you. Better yet — we are completely free to use.

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

Certainly. Search results for flights to Belfast from Chicago shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

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

Not ready to book yet? You can track prices for flights from Chicago to Belfast on Cheapflights with our Price Alert feature and get notified when better prices are available.

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