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Cheap flights from Illinois to Belfast from £238

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.
ORD — BHD
20 Jun — 27 Jun1
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 21 May 2026.

Sun 29/1117:10
ORD
-
BHD
1 stop11h 10m
British Airways
Wed 2/1217:40
BHD
-
ORD
1 stop31h 05m
British Airways
Deal found 19/5£659
Wed 4/1118:45
STL
-
BHD
2 stops15h 50m
American Airlines
Wed 18/1106:35
BHD
-
STL
2 stops17h 02m
American Airlines
Deal found 18/5£679
Fri 18/921:15
ORD
-
BHD
1 stop12h 15m
British Airways
Mon 28/919:35
BHD
-
ORD
1 stop22h 55m
British Airways
Deal found 19/5£691
Thu 8/1017:00
ORD
-
BHD
1 stop11h 10m
British Airways
Mon 12/1018:30
BHD
-
ORD
1 stop27h 25m
British Airways
Deal found 17/5£694
Mon 9/1118:59
STL
-
BHD
2 stops15h 51m
KLM
Mon 23/1117:20
BHD
-
STL
2 stops30h 41m
KLM
Deal found 18/5£695
Thu 11/608:52
ORD
-
BFS
3 stops28h 03m
Multiple Airlines
Tue 16/621:15
BFS
-
ORD
2 stops28h 10m
Multiple Airlines
Deal found 17/5£696
Fri 18/921:15
ORD
-
BHD
1 stop14h 55m
Multiple Airlines
Mon 28/919:35
BHD
-
ORD
2 stops26h 25m
Multiple Airlines
Deal found 19/5£699
Sun 9/819:25
ORD
-
BFS
2 stops19h 55m
Multiple Airlines
Sun 16/806:45
BFS
-
ORD
3 stops36h 37m
Multiple Airlines
Deal found 19/5£714
Wed 17/614:15
ORD
-
BFS
2 stops23h 00m
Multiple Airlines
Wed 24/606:15
BFS
-
ORD
3 stops34h 01m
Multiple Airlines
Deal found 20/5£716
Wed 9/1218:10
ORD
-
BHD
2 stops16h 40m
Virgin Atlantic
Wed 6/117:20
BHD
-
ORD
1 stop27h 05m
Virgin Atlantic
Deal found 17/5£718
Fri 14/821:15
ORD
-
BHD
1 stop12h 15m
British Airways
Tue 18/820:25
BHD
-
ORD
1 stop23h 25m
British Airways
Deal found 19/5£731
Fri 6/1116:13
STL
-
BHD
2 stops18h 37m
KLM
Mon 16/1117:20
BHD
-
STL
2 stops29h 46m
KLM
Deal found 18/5£732

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 21 May 2026.

Round-trip from

£661

One-way from

£238
British Airways
  • British Airways
  • 10/11-13/11
  • 2 total stops
  • 29h 05m total
  • Illinois to Belfast
Search Deals
British Airways
  • British Airways
  • 8/9
  • 1 total stop
  • 11h 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 21 May 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
Fastest return journey

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Tue 10/11

21:45-14:50

1 stop11h 05m

Belfast City

Fri 13/11

06:45-18:45

1 stop18h 00m

£661

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Thu 8/10

17:00-10:10

1 stop11h 10m

Belfast City

Mon 12/10

18:30-15:55

1 stop27h 25m

£694

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Mon 9/11

18:59-16:50

2 stops15h 51m

Belfast City

Mon 23/11

17:20-18:01

2 stops30h 41m

£695

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Thu 11/6

09:55-18:55

2 stops27h 00m

Belfast Intl

Tue 16/6

21:15-19:25

2 stops28h 10m

£721

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Fri 6/11

16:13-16:50

2 stops18h 37m

Belfast City

Mon 16/11

17:20-17:06

2 stops29h 46m

£732

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Thu 9/7

08:45-21:45

3 stops31h 00m

Belfast Intl

Mon 13/7

06:40-16:57

2 stops16h 17m

£740

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Wed 17/6

14:15-19:15

2 stops23h 00m

Belfast Intl

Wed 24/6

05:55-22:05

2 stops22h 10m

£745

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Sun 14/6

08:50-17:45

2 stops26h 55m

Belfast City

Sun 21/6

07:00-14:55

3 stops37h 55m

£761

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Sat 11/7

08:45-18:55

3 stops28h 10m

Belfast Intl

Sun 26/7

06:45-13:22

3 stops36h 37m

£764

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Sun 9/8

21:15-17:40

1 stop14h 25m

Belfast City

Sun 16/8

06:30-18:15

1 stop17h 45m

£783

Flights are sorted by cheapest return flights first.

Deals found on 21/5

Showing 1-10 of 33 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 £661, British Airways can have you in Belfast from Illinois in 11h 05m. 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 Lambert-St Louis - 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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