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$369+ Cheap flights from Belfast Intl (BFS) to Illinois

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 9/10. Fares are subject to change and may not be available on all flights or dates of travel.
BFS — ORD
Aug 31 — Sep 71
Sun 8/31
Sun 9/7
1 adult, Economy
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Cheap 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 August 26, 2025.

Round-trip from

$768
(Mytrip)

One-way from

$369
(Thrive Travel)

Popular in

August

Cheapest in

November

Average price

$1,197
From Belfast Intl to Illinois
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One-way flight from Belfast Intl to Illinois
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Highest demand for flights based on searches. 2% potential increase in price ($25 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($31 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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Find flight deals from Belfast Intl to Illinois

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 August 26, 2025.

This Mytrip deal was found by Cheapflights users on 8/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/267:35 amBFS - ORD
2 stops16h 40mMultiple Airlines
Thu 10/27:25 pmORD - BFS
2 stops15h 15mMultiple Airlines
Deal found 8/25$768
This Mytrip deal was found by Cheapflights users on 8/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/86:40 amBFS - ORD
2 stops17h 35mMultiple Airlines
Mon 9/157:25 pmORD - BFS
2 stops15h 55mMultiple Airlines
Deal found 8/25$834
This Booking.com deal was found by Cheapflights users on 8/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/166:15 amBFS - ORD
3 stops33h 36mMultiple Airlines
Tue 10/1410:27 amORD - BFS
3 stops26h 58mMultiple Airlines
Deal found 8/25$868
This Mytrip deal was found by Cheapflights users on 8/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/910:15 amBFS - ORD
2 stops35h 55mMultiple Airlines
Thu 10/166:00 pmORD - BFS
3 stops23h 25mMultiple Airlines
Deal found 8/25$940
This Mytrip deal was found by Cheapflights users on 8/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/106:35 amBFS - ORD
3 stops31h 43mMultiple Airlines
Fri 10/176:00 pmORD - BFS
2 stops16h 00mMultiple Airlines
Deal found 8/26$1,025

Cheapflights Fare Finder

 
Customize 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 2,558,603 searches. Data last updated August 26, 2025.
Use the filters below to find and compare flights from Belfast Intl Airport to Illinois that are best for you.

Fly from

Belfast Intl

Fly to

Illinois

Route

Depart

Return

Price

BelfastChicago

BFS - ORD

BFSORD

Belfast Intl

Fri 9/26

7:35 am-6:15 pm

2 stops16h 40m

Chicago O'Hare Intl

Thu 10/2

7:25 pm-4:40 pm

2 stops15h 15m

$768

BelfastChicago

BFS - ORD

BFSORD

Belfast Intl

Mon 9/8

6:40 am-6:15 pm

2 stops17h 35m

Chicago O'Hare Intl

Mon 9/15

7:25 pm-5:20 pm

2 stops15h 55m

$834

BelfastChicago

BFS - ORD

BFSORD

Belfast Intl

Tue 9/16

6:15 am-9:51 am

3 stops33h 36m

Chicago O'Hare Intl

Tue 10/14

10:27 am-7:25 pm

3 stops26h 58m

$868

BelfastChicago

BFS - ORD

BFSORD

Belfast Intl

Thu 10/9

10:15 am-4:10 pm

2 stops35h 55m

Chicago O'Hare Intl

Thu 10/16

6:00 pm-11:25 pm

3 stops23h 25m

$940

BelfastChicago

BFS - ORD

BFSORD

Belfast Intl

Fri 10/10

6:35 am-8:18 am

3 stops31h 43m

Chicago O'Hare Intl

Fri 10/17

6:00 pm-4:00 pm

2 stops16h 00m

$1,025

BelfastChicago

BFS - ORD

BFSORD

Belfast Intl

Wed 9/10

9:05 pm-7:44 pm

2 stops52h 39m

$369

BelfastChicago

BFS - ORD

BFSORD

Belfast Intl

Fri 9/5

6:05 am-11:20 pm

3 stops23h 15m

$412

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/24

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 round-trip 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.

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 vacation 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.

  • What is the cheapest month to book a flight from Belfast Intl Airport to Illinois?

    Currently, August is the cheapest month in which you can book a flight from Belfast Intl Airport to Illinois (average of $245). Flying from Belfast Intl Airport to Illinois in March is currently the most expensive (average of $321). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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