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Cheap flights from Chicago to Belfast from £267

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
5 Sep — 12 Sep1
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 6 August 2026.

Wed 16/914:15 -
2 stops20h 50m
Wed 23/920:10 -
3 stops28h 05m
Deal found 2/8£511
Tue 1/919:25 -
2 stops16h 25m
Tue 8/909:50 -
2 stops17h 35m
Deal found 2/8£637
Sun 15/1117:10 -
1 stop11h 10m
Thu 19/1107:40 -
1 stop12h 05m
Deal found 5/8£658
Tue 1/921:15 -
1 stop12h 05m
Tue 8/909:40 -
1 stop14h 35m
Deal found 2/8£683
Wed 25/1118:30 -
2 stops15h 00m
Sun 29/1111:10 -
2 stops35h 05m
Deal found 4/8£712
Thu 17/919:05 -
1 stop17h 40m
Thu 24/906:30 -
1 stop15h 25m
Deal found 3/8£725
Sat 12/919:25 -
3 stops19h 25m
Fri 18/907:00 -
3 stops36h 21m
Deal found 6/8£730
Fri 18/916:01 -
2 stops17h 29m
Fri 25/906:30 -
1 stop15h 25m
Deal found 4/8£737
Fri 18/913:00 -
2 stops21h 55m
Fri 25/909:50 -
2 stops18h 54m
Deal found 4/8£812
Sat 19/919:13 -
2 stops15h 42m
Sat 26/917:30 -
2 stops30h 49m
Deal found 5/8£972
Wed 25/1113:22 -
2 stops13h 48m
Sun 29/1117:20 -
2 stops28h 54m
Deal found 4/8£1,808
Sun 20/1210:35 -
2 stops16h 35m
Sun 27/1209:40 -
2 stops18h 30m
Deal found 3/8£3,712

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 6 August 2026.

Round-trip from

£511

One-way from

£267
16/9-23/9
  • 16/9-23/9
  • 5 total stops
  • 48h 55m total
  • Chicago to Belfast
Search Deals
8/9
  • 8/9
  • 2 total stops
  • 21h 55m 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 6 August 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 Chicago O'Hare Intl - BFS Belfast Intl

ORDBFS

Chicago O'Hare Intl

Wed 16/9

09:55-17:05

2 stops25h 10m

Belfast Intl

Wed 23/9

20:10-18:15

3 stops28h 05m

£524

ChicagoBelfast

ORD Chicago O'Hare Intl - BFS Belfast Intl

ORDBFS

Chicago O'Hare Intl

Sat 12/9

19:25-22:40

2 stops21h 15m

Belfast Intl

Fri 18/9

21:10-19:48

2 stops28h 38m

£642

ChicagoBelfast

ORD Chicago O'Hare Intl - BFS Belfast Intl

ORDBFS

Chicago O'Hare Intl

Tue 15/9

19:25-21:20

2 stops19h 55m

Belfast Intl

Tue 22/9

13:15-14:00

2 stops30h 45m

£648

ChicagoBelfast

ORD Chicago O'Hare Intl - BHD Belfast City

ORDBHD

Chicago O'Hare Intl

Sun 24/1

21:50-18:40

1 stop14h 50m

Belfast City

Thu 28/1

09:05-18:45

1 stop15h 40m

£664
Fastest return journey

ChicagoBelfast

ORD Chicago O'Hare Intl - BHD Belfast City

ORDBHD

Chicago O'Hare Intl

Tue 1/9

21:15-15:20

1 stop12h 05m

Belfast City

Tue 8/9

09:40-18:15

1 stop14h 35m

£683

ChicagoBelfast

ORD Chicago O'Hare Intl - BHD Belfast City

ORDBHD

Chicago O'Hare Intl

Tue 1/9

09:50-17:50

2 stops26h 00m

Belfast City

Tue 8/9

07:00-19:48

3 stops18h 48m

£688

ChicagoBelfast

ORD Chicago O'Hare Intl - BFS Belfast Intl

ORDBFS

Chicago O'Hare Intl

Sat 19/9

19:25-23:25

2 stops22h 00m

Belfast Intl

Sat 26/9

06:55-19:50

3 stops42h 55m

£689

ChicagoBelfast

ORD Chicago O'Hare Intl - BHD Belfast City

ORDBHD

Chicago O'Hare Intl

Thu 17/9

19:05-18:45

1 stop17h 40m

Belfast City

Thu 24/9

06:30-15:55

1 stop15h 25m

£725

ChicagoBelfast

ORD Chicago O'Hare Intl - BHD Belfast City

ORDBHD

Chicago O'Hare Intl

Sat 12/9

19:25-20:50

3 stops19h 25m

Belfast City

Fri 18/9

07:00-13:21

3 stops36h 21m

£730

ChicagoBelfast

ORD Chicago O'Hare Intl - BFS Belfast Intl

ORDBFS

Chicago O'Hare Intl

Fri 18/9

19:25-23:20

3 stops21h 55m

Belfast Intl

Fri 25/9

07:05-19:48

2 stops18h 43m

£731

Flights are sorted by cheapest return flights first.

Deals found on 5/8

Showing 1-10 of 32 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 50m. 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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