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$322+ Cheap flights from Illinois to Belfast

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 9/28. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — BHD
Oct 16 — Oct 231
Thu 10/16
Thu 10/23
1 adult, Economy
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Cheap flight deals from Illinois to Belfast

Keep the following information in mind while searching for Illinois to Belfast flight deals. Data was last updated September 16, 2025.

Round-trip from

$583
(Trip.com)

One-way from

$322
(Kiwi.com)
From Illinois to Belfast
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One-way flight from Illinois to Belfast
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Find flight deals from Illinois to Belfast

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 September 16, 2025.

This Trip.com deal was found by Cheapflights users on 9/15. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/291:26 pmSTL - BFS
2 stops27h 44mMultiple Airlines
Tue 10/76:45 amBFS - STL
2 stops21h 19mMultiple Airlines
Deal found 9/15$583
This British Airways deal was found by Cheapflights users on 9/14. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/59:45 pmORD - BHD
1 stop13h 30mBritish Airways
Tue 12/910:00 amBHD - ORD
1 stop14h 45mBritish Airways
Deal found 9/14$632
This oojo deal was found by Cheapflights users on 9/14. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/306:10 pmORD - BHD
1 stop19h 40mBritish Airways
Mon 11/102:50 pmBHD - ORD
1 stop29h 00mBritish Airways
Deal found 9/14$641
This British Airways deal was found by Cheapflights users on 9/15. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/316:10 pmORD - BHD
1 stop11h 20mBritish Airways
Mon 11/102:50 pmBHD - ORD
1 stop33h 55mBritish Airways
Deal found 9/15$697
This Iberia deal was found by Cheapflights users on 9/14. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/306:10 pmORD - BHD
1 stop17h 30mMultiple Airlines
Sun 11/25:30 amBHD - ORD
2 stops17h 15mMultiple Airlines
Deal found 9/14$702
This American Airlines deal was found by Cheapflights users on 9/15. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/297:59 pmSTL - BHD
2 stops15h 31mAmerican Airlines
Tue 10/79:35 amBHD - STL
2 stops17h 54mAmerican Airlines
Deal found 9/15$706
This Delta deal was found by Cheapflights users on 9/14. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/34:15 pmORD - BHD
1 stop23h 00mDelta
Tue 10/76:30 amBHD - ORD
1 stop13h 40mDelta
Deal found 9/14$722
This Delta deal was found by Cheapflights users on 9/15. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/55:03 pmORD - BHD
2 stops17h 47mDelta
Tue 12/95:20 pmBHD - ORD
1 stop27h 00mDelta
Deal found 9/15$726
This Mytrip deal was found by Cheapflights users on 9/14. 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 10/319:15 pmORD - BFS
3 stops20h 30mMultiple Airlines
Mon 11/1010:20 pmBFS - ORD
3 stops46h 40mMultiple Airlines
Deal found 9/14$726
This Air France deal was found by Cheapflights users on 9/15. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/264:15 pmORD - BHD
1 stop18h 40mMultiple Airlines
Wed 10/16:30 amBHD - ORD
2 stops15h 50mMultiple Airlines
Deal found 9/15$732
This Mytrip deal was found by Cheapflights users on 9/14. 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 10/166:00 pmORD - BFS
3 stops23h 25mMultiple Airlines
Sat 10/256:00 amBFS - ORD
3 stops39h 45mMultiple Airlines
Deal found 9/14$736
This Delta deal was found by Cheapflights users on 9/15. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/39:20 amMDW - BHD
2 stops29h 55mDelta
Tue 10/76:30 amBHD - MDW
2 stops17h 55mDelta
Deal found 9/15$736

Cheapflights Fare Finder

 
Customize 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 2,558,603 searches. Data last updated September 16, 2025.
Use the filters below to find and compare flights from Illinois to Belfast that are best for you.

Fly from

Illinois

Fly to

Belfast

Route

Depart

Return

Price

St. LouisBelfast

STL - BFS

STLBFS

Lambert-St Louis

Mon 9/29

1:26 pm-11:10 pm

2 stops27h 44m

Belfast Intl

Tue 10/7

6:45 am-10:04 pm

2 stops21h 19m

$583

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Fri 12/5

9:45 pm-5:15 pm

1 stop13h 30m

Belfast City

Tue 12/9

10:00 am-6:45 pm

1 stop14h 45m

$632

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Fri 10/31

6:10 pm-10:30 am

1 stop11h 20m

Belfast City

Mon 11/10

2:50 pm-6:45 pm

1 stop33h 55m

$697

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Wed 12/3

9:45 pm-2:15 pm

1 stop10h 30m

Belfast City

Sun 12/7

5:35 pm-1:50 pm

1 stop26h 15m

$697

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Thu 10/30

6:10 pm-4:40 pm

1 stop17h 30m

Belfast City

Sun 11/2

5:30 am-5:45 pm

2 stops17h 15m

$702

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Mon 9/29

7:59 pm-5:30 pm

2 stops15h 31m

Belfast City

Tue 10/7

9:35 am-9:29 pm

2 stops17h 54m

$706

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Fri 10/3

4:15 pm-9:15 pm

1 stop23h 00m

Belfast City

Tue 10/7

6:30 am-2:10 pm

1 stop13h 40m

$722

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Fri 12/5

5:03 pm-4:50 pm

2 stops17h 47m

Belfast City

Tue 12/9

5:20 pm-2:20 pm

1 stop27h 00m

$726

ChicagoBelfast

ORD - BHD

ORDBHD

Chicago O'Hare Intl

Fri 9/26

4:15 pm-4:55 pm

1 stop18h 40m

Belfast City

Wed 10/1

6:30 am-4:20 pm

2 stops15h 50m

$732

ChicagoBelfast

MDW - BHD

MDWBHD

Chicago Midway

Fri 10/3

9:20 am-9:15 pm

2 stops29h 55m

Belfast City

Tue 10/7

6:30 am-6:25 pm

2 stops17h 55m

$736

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/15

Showing 1-10 of 31 results
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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 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 Illinois to Belfast

What is the cheapest time of day to fly from IL to BFS?

Find hourly flight availability from Illinois to Belfast. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 16, 2025.

When flying from Illinois to Belfast, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

How much does it cost to fly round-trip from Illinois to Belfast?

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?

    A quick flight from Illinois to Belfast can take about 13h 30m. British Airways provides one of the quickest options available for as low as $632. There are 3644 mi between Illinois and Belfast. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

    The most popular flight routes from Illinois to Belfast are Chicago O'Hare Intl - Belfast Intl, Chicago O'Hare Intl - Belfast City and Chicago Midway - Belfast City.

  • 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 vacation 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.

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

    Currently, February is the cheapest month in which you can book a flight from Illinois to Belfast (average of $657). Flying from Illinois to Belfast in June is currently the most expensive (average of $1,189). 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.

See more FAQs

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Alternative routes for Illinois to Belfast

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Top airline flying from Illinois to Belfast

Discover the top airline that operate flights from Illinois to Belfast. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated September 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$577Average$720FlexibilityNo cancel feeOn-time70%

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