$410+ Cheap flights from Illinois to Belfast Intl (BFS)
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 4/17. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — BFS
Dec 3 — Dec 101
1 adult, Economy
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Cheapest flights from Illinois to Belfast IntlExplore 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 November 3, 2025.
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 November 3, 2025.
This Mytrip deal was found by Cheapflights users on 11/1. 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.
Sat 11/156:30 pmORD - BFS
2 stops22h 10mMultiple Airlines
Tue 11/186:30 amBFS - ORD
3 stops38h 30mMultiple Airlines
Deal found 11/1![Multiple Airlines logo]()
$708
This Mytrip deal was found by Cheapflights users on 10/31. 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.
Tue 12/167:05 amORD - BFS
2 stops25h 20mMultiple Airlines
Tue 12/235:30 pmBFS - ORD
2 stops32h 35mMultiple Airlines
Deal found 10/31![Multiple Airlines logo]()
$772
This Mytrip deal was found by Cheapflights users on 10/31. 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.
Tue 11/49:50 pmORD - BFS
2 stops18h 45mMultiple Airlines
Thu 11/66:30 amBFS - ORD
2 stops22h 36mMultiple Airlines
Deal found 10/31![Multiple Airlines logo]()
$1,064
This Mytrip deal was found by Cheapflights users on 11/1. 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.
Wed 12/176:30 pmORD - BFS
2 stops15h 40mMultiple Airlines
Wed 12/244:25 pmBFS - ORD
3 stops33h 35mMultiple Airlines
Deal found 11/1![Multiple Airlines logo]()
$1,097
Cheap 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 November 3, 2025.
Round-trip from | $708 (Mytrip) |
|---|---|
One-way from | $410 (Kiwi.com) |
Cheapflights Fare Finder
Customize 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 2,558,603 searches. Data last updated November 3, 2025.
Use the filters below to find and compare flights from Illinois to Belfast Intl Airport that are best for you.
Fly from
Illinois
Fly to
Belfast Intl
Route
Depart
Return
Price
ChicagoBelfast
ORD - BFS
ORDBFS
Chicago O'Hare Intl
Sat 11/15
6:30 pm-10:40 pm
2 stops22h 10m
Belfast Intl
Tue 11/18
6:30 am-3:00 pm
3 stops38h 30m
$708
ChicagoBelfast
ORD - BFS
ORDBFS
Chicago O'Hare Intl
Tue 12/16
7:05 am-2:25 pm
2 stops25h 20m
Belfast Intl
Tue 12/23
5:30 pm-8:05 pm
2 stops32h 35m
$772
ChicagoBelfast
ORD - BFS
ORDBFS
Chicago O'Hare Intl
Wed 12/17
6:30 pm-4:10 pm
2 stops15h 40m
Belfast Intl
Wed 12/24
4:25 pm-8:00 pm
3 stops33h 35m
$1,097
St. LouisBelfast
STL - BFS
STLBFS
Lambert-St Louis
Thu 3/12
12:15 pm-1:40 pm
2 stops20h 25m
Belfast Intl
Thu 3/26
6:25 pm-11:50 pm
2 stops34h 25m
$1,156
ChicagoBelfast
ORD - BFS
ORDBFS
Chicago O'Hare Intl
Fri 4/17
10:40 pm-8:40 pm
2 stops40h 00m
$410
ChicagoBelfast
MDW - BFS
MDWBFS
Chicago Midway
Fri 4/17
11:00 am-4:45 pm
3 stops23h 45m
$457
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 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 Intl Airport
What is the cheapest time of day to fly from IL to BFS?
Find hourly flight availability from Illinois to Belfast Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated November 3, 2025.
Unlike at noon, when flights are generally more expensive, you can save up to 29% on flights from Illinois to Belfast Intl Airport by exploring options for tickets in the morning.
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.
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Alternative routes for Illinois to Belfast Intl
See prices for flight routes from nearby airports that may be better suited for you.
Top airline flying from Illinois to Belfast Intl
Discover the top airline that operate flights from Illinois to Belfast Intl. 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 November 3, 2025.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$577 | Average$691 | FlexibilityNo cancel fee | On-time70% |