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Cheap flights from Illinois to Belfast Intl Airport 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.
ORD — BFS
5 Sep — 12 Sep1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Illinois to Belfast Intl

Enter your travel dates to find the best prices.

Cheapest flights from Illinois to Belfast Intl
Explore the most affordable flight options available from Illinois to Belfast Intl. 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
Sat 12/914:40 -
2 stops12h 55m
Sun 13/922:10 -
3 stops28h 10m
Deal found 3/8£1,025

Find flight deals from Illinois to Belfast Intl

Keep the following information in mind while searching for Illinois to Belfast Intl flight deals. Data was 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
  • Illinois to Belfast
Search Deals
8/9
  • 8/9
  • 2 total stops
  • 21h 55m total
  • Illinois to Belfast
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Illinois to Belfast Intl 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 Illinois to Belfast Intl Airport 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

14:15-17:05

2 stops20h 50m

Belfast Intl

Wed 23/9

20:10-18:15

3 stops28h 05m

£520

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 - BFS Belfast Intl

ORDBFS

Chicago O'Hare Intl

Sat 12/9

22:25-22:40

2 stops18h 15m

Belfast Intl

Sun 20/9

20:25-19:15

2 stops28h 50m

£674

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
Fastest return journey

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

ChicagoBelfast

ORD Chicago O'Hare Intl - BFS Belfast Intl

ORDBFS

Chicago O'Hare Intl

Mon 14/9

11:05-16:15

3 stops23h 10m

Belfast Intl

Mon 21/9

07:05-10:15

3 stops33h 10m

£746

St. LouisBelfast

STL Lambert-St Louis - BFS Belfast Intl

STLBFS

Lambert-St Louis

Sat 12/9

14:40-09:35

2 stops12h 55m

Belfast Intl

Sun 13/9

22:10-20:20

3 stops28h 10m

£1,025
Cheapest one-way

ChicagoBelfast

ORD Chicago O'Hare Intl - BFS Belfast Intl

ORDBFS

Chicago O'Hare Intl

Tue 8/9

19:25-23:20

2 stops21h 55m

£267

ChicagoBelfast

ORD Chicago O'Hare Intl - BFS Belfast Intl

ORDBFS

Chicago O'Hare Intl

Wed 12/8

18:00-08:30

2 stops32h 30m

£306

ChicagoBelfast

MDW Chicago Midway - BFS Belfast Intl

MDWBFS

Chicago Midway

Tue 8/9

15:20-17:55

3 stops44h 35m

£314

Flights are sorted by cheapest return flights first.

Deals found on 5/8

Showing 1-10 of 12 resultsSorted by cheapest first
1
2

Best time to book a flight from Illinois to Belfast Intl

Have a flexible travel schedule? Discover the best time to fly to Belfast Intl 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 Intl Airport

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 Intl. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What are the most popular routes from Illinois to Belfast Intl Airport?

    While some choose either Chicago Midway - Belfast Intl or Lambert-St Louis - Belfast Intl, Chicago O'Hare Intl - Belfast Intl is the most popular route from Illinois to Belfast Intl Airport.

  • Can I find deals for flights from Illinois to Belfast Intl that include hotel bookings?

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

  • How can I find direct flights from Illinois to Belfast Intl?

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

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

    Yes. Cheapflights offers flight deals from Illinois to Belfast Intl 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

Travelling to a place near Belfast Intl Airport?

Book flights to Belfast Intl Airport if you plan to visit one of these locations
Armagh
Newry

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

Yes! Cheapflights helps users easily find flights from Illinois to Belfast Intl with no change fees.

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

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Belfast Intl from Illinois today and book when prices fit your budget.

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