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Cheap flights from Belfast Intl Airport to Illinois from £406

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 9/8. Fares are subject to change and may not be available on all flights or dates of travel.
BFS — ORD
11 Jul — 18 Jul1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Belfast Intl to Illinois

Enter your travel dates to find the best prices.

Cheapest flights from Belfast Intl to Illinois
Explore the most affordable flight options available from Belfast Intl to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 11 June 2026.

Wed 22/722:45
BFS
-
ORD
3 stops27h 20m
Multiple Airlines
Wed 29/719:25
ORD
-
BFS
3 stops20h 55m
Multiple Airlines
Deal found 7/6£680
Mon 13/720:35
BFS
-
ORD
3 stops29h 17m
Multiple Airlines
Sun 19/719:25
ORD
-
BFS
2 stops20h 05m
Multiple Airlines
Deal found 6/6£719
Mon 20/720:35
BFS
-
ORD
3 stops31h 30m
Multiple Airlines
Sat 25/719:25
ORD
-
BFS
2 stops19h 15m
Multiple Airlines
Deal found 10/6£724
Mon 6/706:40
BFS
-
ORD
2 stops19h 12m
Multiple Airlines
Mon 13/719:25
ORD
-
BFS
3 stops21h 55m
Multiple Airlines
Deal found 6/6£737
Mon 15/606:10
BFS
-
ORD
2 stops21h 15m
Multiple Airlines
Mon 22/619:25
ORD
-
BFS
2 stops21h 00m
Multiple Airlines
Deal found 7/6£775

Find flight deals from Belfast Intl to Illinois

Keep the following information in mind while searching for Belfast Intl to Illinois flight deals. Data was last updated 11 June 2026.

Round-trip from

£680

One-way from

£406
22/7-29/7
  • 22/7-29/7
  • 6 total stops
  • 48h 15m total
  • Belfast to Illinois
Search Deals
9/8
  • 9/8
  • 3 total stops
  • 42h 15m total
  • Belfast to Illinois
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Belfast Intl to Illinois 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 11 June 2026.
Use the filters below to find and compare flights from Belfast Intl Airport to Illinois that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

BelfastChicago

BFS - ORD

BFSORD

Belfast Intl

Wed 22/7

22:45-20:05

3 stops27h 20m

Chicago O'Hare Intl

Wed 29/7

19:25-22:20

3 stops20h 55m

£680

BelfastChicago

BFS - ORD

BFSORD

Belfast Intl

Mon 20/7

20:35-22:05

3 stops31h 30m

Chicago O'Hare Intl

Sat 25/7

19:25-20:40

2 stops19h 15m

£724
Fastest return journey

BelfastChicago

BFS - ORD

BFSORD

Belfast Intl

Mon 6/7

06:40-19:52

2 stops19h 12m

Chicago O'Hare Intl

Mon 13/7

19:25-23:20

3 stops21h 55m

£737

BelfastChicago

BFS - ORD

BFSORD

Belfast Intl

Mon 13/7

05:50-20:05

3 stops20h 15m

Chicago O'Hare Intl

Sun 19/7

08:45-12:00

3 stops21h 15m

£1,354
Cheapest one-way

BelfastChicago

BFS - ORD

BFSORD

Belfast Intl

Sun 9/8

07:00-19:15

3 stops42h 15m

£406

BelfastChicago

BFS - ORD

BFSORD

Belfast Intl

Tue 30/6

07:35-14:45

3 stops37h 10m

£456

BelfastChicago

BFS - ORD

BFSORD

Belfast Intl

Sun 12/7

06:45-14:55

3 stops38h 10m

£484

BelfastChicago

BFS - ORD

BFSORD

Belfast Intl

Thu 2/7

12:45-16:00

3 stops33h 15m

£514
Fastest single journey

BelfastChicago

BFS - ORD

BFSORD

Belfast Intl

Fri 3/7

07:35-23:19

2 stops21h 44m

£610

BelfastChicago

BFS - ORD

BFSORD

Belfast Intl

Wed 1/7

17:45-12:40

2 stops24h 55m

£639

Flights are sorted by cheapest return flights first.

Deals found on 9/6

Sorted by cheapest first

Best time to book a flight from Belfast Intl to Illinois

Have a flexible travel schedule? Discover the best time to fly to Illinois from Belfast Intl 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 Belfast Intl Airport to Illinois
No data available for this route at this time. Please check back soon.

Reviews of airlines servicing Illinois

Get insights into the airlines that provide service to Illinois. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Illinois. Reviews last updated 11 June 2026.
Get a feel of what it's like to fly with British Airways from Belfast Intl Airport to Illinois by reading reviews from past customers. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
British Airways
6.7
Okay
8,044 reviews
Check prices

Overall

6.7

Boarding

6.9

Comfort

6.8

Crew

7.7

Entertainment

6.4

Food

6.4

Reviews

1 / 20
6.0
Good

Roxanne,Sept 2025

LHR - IAD

Food was mediocre. Couldn't use headphones because no information on how to use. Staff paid so much attention on a family with a baby . They got VIP treatment.
British Airways
6.7
Okay
8,044 reviews
British Airways
6.7
Okay
8,044 reviews
Check prices

Overall

6.7

Boarding

6.9

Comfort

6.8

Crew

7.7

Entertainment

6.4

Food

6.4

Reviews

1 / 20
6.0
Good

Roxanne,Sept 2025

LHR - IAD

Food was mediocre. Couldn't use headphones because no information on how to use. Staff paid so much attention on a family with a baby . They got VIP treatment.

Related info for your journey

Find useful and relevant information for your journey from Belfast Intl to Illinois. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Belfast Intl to Illinois by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

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Need flexible booking options for your flight to Illinois from Belfast Intl? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

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