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Cheap flights from Belfast Intl Airport to Illinois from £303

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 8/6. Fares are subject to change and may not be available on all flights or dates of travel.
BFS — ORD
17 May — 24 May1
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 17 April 2026.

Sun 17/516:30
BFS
-
ORD
3 stops37h 26m
Multiple Airlines
Sun 24/509:55
ORD
-
BFS
2 stops29h 05m
Multiple Airlines
Deal found 17/4£714
Sun 10/516:30
BFS
-
ORD
3 stops37h 26m
Multiple Airlines
Sun 17/508:45
ORD
-
BFS
3 stops30h 15m
Multiple Airlines
Deal found 12/4£730
Thu 28/520:05
BFS
-
ORD
2 stops30h 03m
Multiple Airlines
Thu 4/608:45
ORD
-
BFS
3 stops28h 10m
Multiple Airlines
Deal found 13/4£748
Sun 31/509:55
BFS
-
ORD
2 stops18h 19m
Multiple Airlines
Sun 7/608:50
ORD
-
BFS
2 stops28h 00m
Multiple Airlines
Deal found 15/4£793
Mon 4/506:10
BFS
-
ORD
2 stops15h 45m
Multiple Airlines
Mon 11/514:20
ORD
-
BFS
2 stops19h 10m
Multiple Airlines
Deal found 16/4£941

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 17 April 2026.

Round-trip from

£714

One-way from

£303
17/5-24/5
  • 17/5-24/5
  • 5 total stops
  • 66h 31m total
  • Belfast to Illinois
Search Deals
8/6
  • 8/6
  • 3 total stops
  • 55h 21m 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 17 April 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

Sun 10/5

16:30-23:56

3 stops37h 26m

Chicago O'Hare Intl

Sun 17/5

08:45-21:00

3 stops30h 15m

£730

BelfastChicago

BFS - ORD

BFSORD

Belfast Intl

Sun 17/5

21:25-19:40

2 stops28h 15m

Chicago O'Hare Intl

Sun 24/5

09:55-21:00

2 stops29h 05m

£749

BelfastChicago

BFS - ORD

BFSORD

Belfast Intl

Thu 28/5

20:05-14:53

2 stops24h 48m

Chicago O'Hare Intl

Thu 4/6

09:55-18:55

2 stops27h 00m

£770

BelfastChicago

BFS - ORD

BFSORD

Belfast Intl

Sun 31/5

09:55-22:14

2 stops18h 19m

Chicago O'Hare Intl

Sun 7/6

08:50-18:50

2 stops28h 00m

£793
Fastest return journey

BelfastChicago

BFS - ORD

BFSORD

Belfast Intl

Mon 4/5

06:10-15:55

2 stops15h 45m

Chicago O'Hare Intl

Mon 11/5

14:20-15:30

2 stops19h 10m

£941
Cheapest one-way

BelfastChicago

BFS - ORD

BFSORD

Belfast Intl

Mon 8/6

18:50-20:11

3 stops55h 21m

£303
Fastest single journey

BelfastChicago

BFS - ORD

BFSORD

Belfast Intl

Thu 11/6

21:25-21:15

3 stops53h 50m

£366

Flights are sorted by cheapest return flights first.

Deals found on 16/4

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 17 April 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
7,889 reviews
Check prices

Overall

6.7

Crew

7.7

Comfort

6.8

Entertainment

6.4

Boarding

6.9

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
7,889 reviews
British Airways
6.7
Okay
7,889 reviews
Check prices

Overall

6.7

Crew

7.7

Comfort

6.8

Entertainment

6.4

Boarding

6.9

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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Alternative routes for Belfast Intl to Illinois

See prices for flight routes from nearby airports that may be better suited for you.
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