$893+ Cheap flights from Illinois to Donegal (CFN)
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/13. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — CFN
Mar 4 — Mar 111
1 adult, Economy
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1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
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Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Illinois to Donegal
Cheapest
Best
Last-minute
Cheapest flights from Illinois to DonegalExplore the most affordable flight options available from Illinois to Donegal. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 2, 2026.
Explore the most affordable flight options available from Illinois to Donegal. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 2, 2026.
This BusinessClass deal was found by Cheapflights users on 1/30. 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 BusinessClass is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/136:30 pm
ORD
- CFN
2 stops19h 30m
Multiple Airlines
Mon 2/162:30 pm
CFN
- ORD
2 stops29h 20m
Multiple Airlines
Deal found 1/30![Multiple Airlines logo]()
$893
Best flights from Illinois to DonegalDiscover carefully curated flight deals from Illinois to Donegal that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated February 2, 2026.
Discover carefully curated flight deals from Illinois to Donegal that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated February 2, 2026.
This BusinessClass deal was found by Cheapflights users on 1/30. 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 BusinessClass is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/136:30 pm
ORD
- CFN
2 stops19h 30m
Multiple Airlines
Mon 2/162:30 pm
CFN
- ORD
2 stops29h 20m
Multiple Airlines
Deal found 1/30![Multiple Airlines logo]()
$893
Last-minute flights from Illinois to DonegalDiscover last-minute flight deals from Illinois to Donegal. Data last updated February 2, 2026 and is based on user searches.
Discover last-minute flight deals from Illinois to Donegal. Data last updated February 2, 2026 and is based on user searches.
This BusinessClass deal was found by Cheapflights users on 1/30. 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 BusinessClass is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/136:30 pm
ORD
- CFN
2 stops19h 30m
Multiple Airlines
Mon 2/162:30 pm
CFN
- ORD
2 stops29h 20m
Multiple Airlines
Deal found 1/30![Multiple Airlines logo]()
$893
Find flight deals from Illinois to Donegal
Keep the following information in mind while searching for Illinois to Donegal flight deals. Data was last updated February 2, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $893 (BusinessClass) |
Cheapflights Fare Finder
Customize your flight search to find flights from Illinois to Donegal 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 February 2, 2026.
Use the filters below to find and compare flights from Illinois to Donegal that are best for you.
Fly from
Illinois
Fly to
Donegal
Route
Depart
Return
Price
ChicagoDonegal
ORD - CFN
ORDCFN
Chicago O'Hare Intl
Fri 2/13
6:30 pm-8:00 pm
2 stops19h 30m
Donegal
Mon 2/16
2:30 pm-1:50 pm
2 stops29h 20m
$893
Best time to book a flight from Illinois to Donegal
Have a flexible travel schedule? Discover the best time to fly to Donegal from Illinois with our price prediction graph.
ORD-CFN
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 Donegal
USIL-CFN
ORD-CFN
No data available for this route at this time. Please check back soon.