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Cheap flights from Chicago to Belfast from £231

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 20/9. Fares are subject to change and may not be available on all flights or dates of travel.
CHI — BHD
19 May — 26 May1
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 19 April 2026.

Tue 2/609:55
ORD
-
BFS
2 stops27h 45m
Multiple Airlines
Tue 9/620:15
BFS
-
ORD
3 stops31h 10m
Multiple Airlines
Deal found 18/4£600
Mon 1/610:00
ORD
-
BFS
2 stops24h 15m
Multiple Airlines
Mon 8/618:50
BFS
-
ORD
3 stops29h 25m
Multiple Airlines
Deal found 17/4£619
Mon 27/419:25
ORD
-
BFS
2 stops17h 25m
Multiple Airlines
Wed 6/505:55
BFS
-
ORD
2 stops18h 20m
Multiple Airlines
Deal found 14/4£626
Sun 6/1221:45
ORD
-
BHD
1 stop13h 05m
British Airways
Thu 10/1217:45
BHD
-
ORD
1 stop26h 05m
British Airways
Deal found 17/4£657
Sun 13/919:05
ORD
-
BFS
2 stops20h 45m
Multiple Airlines
Sun 20/907:10
BFS
-
ORD
3 stops37h 20m
Multiple Airlines
Deal found 17/4£663
Tue 26/509:55
ORD
-
BFS
2 stops27h 45m
Multiple Airlines
Sun 31/507:10
BFS
-
ORD
3 stops37h 20m
Multiple Airlines
Deal found 18/4£674
Thu 22/1017:00
ORD
-
BHD
1 stop11h 10m
British Airways
Tue 27/1019:25
BHD
-
ORD
1 stop24h 25m
British Airways
Deal found 16/4£690
Sun 13/921:15
ORD
-
BHD
1 stop14h 25m
American Airlines
Sun 20/906:30
BHD
-
ORD
1 stop17h 05m
American Airlines
Deal found 17/4£692
Thu 22/1019:25
ORD
-
BFS
2 stops21h 40m
Multiple Airlines
Tue 27/1006:00
BFS
-
ORD
3 stops42h 25m
Multiple Airlines
Deal found 16/4£695
Sun 13/921:15
ORD
-
BHD
1 stop14h 25m
Multiple Airlines
Sun 20/920:10
BHD
-
ORD
2 stops25h 50m
Multiple Airlines
Deal found 17/4£697
Sun 31/517:35
ORD
-
BFS
2 stops21h 25m
Multiple Airlines
Sun 7/622:10
BFS
-
ORD
3 stops47h 00m
Multiple Airlines
Deal found 16/4£714
Sun 13/1217:10
ORD
-
BHD
1 stop11h 10m
British Airways
Sat 19/1218:00
BHD
-
ORD
1 stop25h 50m
British Airways
Deal found 14/4£728

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 19 April 2026.

Round-trip from

£600

One-way from

£231
2/6-9/6
  • 2/6-9/6
  • 5 total stops
  • 58h 55m total
  • Chicago to Belfast
Search Deals
20/9
  • 20/9
  • 2 total stops
  • 14h 25m 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 19 April 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

Mon 1/6

10:00-16:15

2 stops24h 15m

Belfast Intl

Mon 8/6

18:50-18:15

3 stops29h 25m

£619

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Sun 31/5

17:35-21:00

2 stops21h 25m

Belfast Intl

Sun 7/6

22:10-15:10

3 stops47h 00m

£714

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Tue 2/6

09:55-19:40

2 stops27h 45m

Belfast Intl

Tue 9/6

05:55-16:59

2 stops17h 04m

£742

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Tue 26/5

19:25-19:50

3 stops18h 25m

Belfast Intl

Sun 31/5

07:00-14:30

3 stops37h 30m

£749

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Sat 30/5

09:25-08:55

3 stops17h 30m

Belfast Intl

Sat 6/6

06:55-13:10

3 stops36h 15m

£797

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Sun 13/9

21:00-21:30

2 stops18h 30m

Belfast Intl

Sun 20/9

08:25-18:15

2 stops15h 50m

£821

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Sun 19/7

18:20-14:35

1 stop14h 15m

Belfast City

Sat 25/7

16:15-12:30

1 stop26h 15m

£837

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Sat 16/5

09:36-09:20

2 stops17h 44m

Belfast City

Mon 1/6

17:30-14:15

1 stop26h 45m

£842

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Sat 16/5

09:36-09:20

2 stops17h 44m

Belfast City

Wed 27/5

17:30-14:15

1 stop26h 45m

£842

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Wed 13/5

09:44-09:20

2 stops17h 36m

Belfast City

Thu 28/5

17:30-14:15

1 stop26h 45m

£864

Flights are sorted by cheapest return flights first.

Deals found on 16/4

Showing 1-10 of 37 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 13h 05m. There are 3644 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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