Cheap flights from Illinois to Belfast Intl Airport from £237
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 28/9. Fares are subject to change and may not be available on all flights or dates of travel.
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 16 September 2025.
Round-trip from | £429 |
---|---|
One-way from | £237 |
Find flight deals from Illinois to Belfast Intl
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 16 September 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 16 September 2025.
Cheapflights Fare Finder
Use the filters below to find and compare flights from Illinois to Belfast Intl Airport that are best for you.
Fly from
Fly to
Route
Depart
Return
Price
St. LouisBelfast
STL - BFS
STLBFS
Lambert-St Louis
Mon 29/9
13:26-23:10
2 stops27h 44m
Belfast Intl
Tue 7/10
06:45-22:04
2 stops21h 19m
ChicagoBelfast
ORD - BFS
ORDBFS
Chicago O'Hare Intl
Thu 16/10
18:00-23:25
3 stops23h 25m
Belfast Intl
Sat 25/10
06:00-15:45
3 stops39h 45m
ChicagoBelfast
ORD - BFS
ORDBFS
Chicago O'Hare Intl
Thu 30/10
19:50-22:20
2 stops21h 30m
Belfast Intl
Thu 6/11
14:25-16:20
2 stops31h 55m
ChicagoBelfast
ORD - BFS
ORDBFS
Chicago O'Hare Intl
Sat 27/9
08:40-17:10
3 stops26h 30m
Belfast Intl
Thu 2/10
16:25-16:30
3 stops30h 05m
ChicagoBelfast
ORD - BFS
ORDBFS
Chicago O'Hare Intl
Sun 28/9
06:30-20:20
2 stops31h 50m
Belfast Intl
Thu 2/10
16:25-16:30
3 stops30h 05m
ChicagoBelfast
ORD - BFS
ORDBFS
Chicago O'Hare Intl
Thu 30/10
19:30-12:35
2 stops12h 05m
Belfast Intl
Mon 10/11
22:20-15:00
3 stops46h 40m
ChicagoBelfast
ORD - BFS
ORDBFS
Chicago O'Hare Intl
Sun 28/9
19:15-23:20
3 stops22h 05m
Belfast Intl
Wed 1/10
17:20-12:35
2 stops25h 15m
ChicagoBelfast
ORD - BFS
ORDBFS
Chicago O'Hare Intl
Mon 29/9
12:00-13:15
3 stops19h 15m
Belfast Intl
Thu 2/10
16:25-16:30
3 stops30h 05m
ChicagoBelfast
ORD - BFS
ORDBFS
Chicago O'Hare Intl
Fri 26/9
10:23-22:20
3 stops29h 57m
Belfast Intl
Wed 1/10
17:20-12:35
2 stops25h 15m
ChicagoBelfast
ORD - BFS
ORDBFS
Chicago O'Hare Intl
Thu 30/10
10:00-22:05
2 stops31h 05m
Belfast Intl
Sun 2/11
05:30-20:00
2 stops19h 30m
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.
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Everything you need to know about your flight from Illinois to Belfast Intl Airport
Related info for your journey
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Alternative routes for Illinois to Belfast Intl
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Why should you use Cheapflights to find cheap flight tickets from Illinois to Belfast Intl?
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Can Cheapflights find flights from Illinois to Belfast Intl with no change fees?
Yes! Cheapflights helps users easily find flights from Illinois to Belfast Intl with no change fees.
Can Cheapflights notify me if prices for flights from Illinois to Belfast Intl become cheaper?
Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Belfast Intl from Illinois today and book when prices fit your budget.