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Cheap flights from Chicago (CHI) to Belfast (BFS)

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How to find the cheapest flight from Chicago (CHI) to Belfast (BFS)

How to find the cheapest flight from Chicago (CHI) to Belfast (BFS)
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How to find the cheapest flight from Chicago (CHI) to Belfast (BFS)
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How to find the cheapest flight from Chicago (CHI) to Belfast (BFS)
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Cheap flights from Chicago to Belfast in December 2025 , January 2026

31 Dec - 11 Jan $ 724.00
CHI
Chicago
Frontier Airlines
2 STOPS
BFS
Belfast
BFS
Belfast
Frontier Airlines
2 STOPS
CHI
Chicago
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31 Dec - 11 Jan $ 728.00
CHI
Chicago
Frontier Airlines
2 STOPS
BFS
Belfast
BFS
Belfast
Frontier Airlines
2 STOPS
CHI
Chicago
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31 Dec - 12 Jan $ 746.00
CHI
Chicago
Frontier Airlines
2 STOPS
BFS
Belfast
BFS
Belfast
Frontier Airlines
2 STOPS
CHI
Chicago
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Last minute flights from Chicago to Belfast

29 Dec - 31 Dec $ 1,276.00
CHI
Chicago
Frontier Airlines
2 STOPS
BFS
Belfast
BFS
Belfast
Frontier Airlines
2 STOPS
CHI
Chicago
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29 Dec - 31 Dec $ 1,294.00
CHI
Chicago
Frontier Airlines
2 STOPS
BFS
Belfast
BFS
Belfast
Frontier Airlines
2 STOPS
CHI
Chicago
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29 Dec - 31 Dec $ 1,324.00
CHI
Chicago
Frontier Airlines
2 STOPS
BFS
Belfast
BFS
Belfast
Frontier Airlines
2 STOPS
CHI
Chicago
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One-way flights to Belfast from Chicago

6:30 PM - 2:30 PM
easyJet
2 Stops
15h
CHI - BFS
$ 299
Kiwi
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6:30 PM - 12:40 PM
Aer Lingus
2 Stops
13h 20m
CHI - BFS
$ 303
Kiwi
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6:30 PM - 3:00 PM
easyJet
2 Stops
15h 30m
CHI - BFS
$ 341
Kiwi
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How to find the cheapest flight from Chicago (CHI) to Belfast (BFS)

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How to find the cheapest flight from Chicago (CHI) to Belfast (BFS)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.
How to find the cheapest flight from Chicago (CHI) to Belfast (BFS)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.