How does KAYAK find such low prices on flights from Illinois to Donegal?

KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Illinois to Donegal.

How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Illinois to Donegal?

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Donegal from Illinois is likely to change within 7 days, so travelers know whether to wait or book now.

What is the Hacker Fare option on flights from Illinois to Donegal?

Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional return ticket. You could then fly to Donegal with an airline and back to Illinois with another airline.

What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Illinois to Donegal?

Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Donegal from Illinois up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

€802 CHEAP FLIGHTS from Illinois to Donegal

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Cheap Flights from Illinois to Donegal

Discover the best prices for you by selecting your travel dates on KAYAK.

Return

Recent return flight deals from Illinois to Donegal

Mon, 5 Oct - Mon, 12 Oct

21:00 - 14:00ORD Chicago O'Hare Intl-CFN Donegal

11h 00m1 stop Dublin

07:55 - 19:15CFN Donegal-ORD Chicago O'Hare Intl

17h 20m1 stop Dublin

€802Aer Lingus

Mon, 5 Oct - Mon, 12 Oct

15:48 - 14:00ORD Chicago O'Hare Intl-CFN Donegal

16h 12m2 stops Boston Logan Intl Dublin

14:30 - 14:00CFN Donegal-ORD Chicago O'Hare Intl

29h 30m1 stop Dublin

€978Multiple Airlines

Mon, 5 Oct - Mon, 12 Oct

17:00 - 14:00ORD Chicago O'Hare Intl-CFN Donegal

15h 00m2 stops London Heathrow Dublin

14:30 - 12:30CFN Donegal-ORD Chicago O'Hare Intl

28h 00m2 stops Dublin London Heathrow

€996Multiple Airlines

Sat, 26 Dec - Sat, 2 Jan

17:51 - 14:00ORD Chicago O'Hare Intl-CFN Donegal

38h 09m2 stops Boston Logan Intl Dublin

07:55 - 15:45CFN Donegal-ORD Chicago O'Hare Intl

37h 50m2 stops Dublin Indianapolis

€1,053Multiple Airlines

Sat, 26 Dec - Sat, 2 Jan

20:05 - 14:00ORD Chicago O'Hare Intl-CFN Donegal

11h 55m1 stop Dublin

07:55 - 13:08CFN Donegal-ORD Chicago O'Hare Intl

35h 13m2 stops Dublin Indianapolis

€1,085Aer Lingus

Sun, 8 Nov - Thu, 12 Nov

20:30 - 20:00ORD Chicago O'Hare Intl-CFN Donegal

17h 30m2 stops London Heathrow Dublin

08:00 - 18:45CFN Donegal-ORD Chicago O'Hare Intl

16h 45m2 stops Dublin London Heathrow

€1,187British Airways

Mon, 9 Nov - Fri, 13 Nov

17:10 - 20:00ORD Chicago O'Hare Intl-CFN Donegal

20h 50m2 stops London Heathrow Dublin

07:55 - 18:45CFN Donegal-ORD Chicago O'Hare Intl

16h 50m2 stops Dublin London Heathrow

€1,189British Airways

Sat, 26 Dec - Sat, 2 Jan

20:05 - 14:00ORD Chicago O'Hare Intl-CFN Donegal

11h 55m1 stop Dublin

07:55 - 14:10CFN Donegal-ORD Chicago O'Hare Intl

12h 15m1 stop Dublin

€1,237Multiple Airlines

Sat, 26 Dec - Sat, 2 Jan

21:50 - 20:00ORD Chicago O'Hare Intl-CFN Donegal

16h 10m2 stops London Heathrow Dublin

14:30 - 19:55CFN Donegal-ORD Chicago O'Hare Intl

35h 25m3 stops Dublin Krakow J. Paul II Balice Warsaw Frederic Chopin

€1,402Multiple Airlines

Useful Info

Cheapest flight	€802

Flight from Chicago to Donegal

How does KAYAK find such low prices on flights from Illinois to Donegal?
KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Illinois to Donegal.
How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Illinois to Donegal?
KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Donegal from Illinois is likely to change within 7 days, so travelers know whether to wait or book now.
What is the Hacker Fare option on flights from Illinois to Donegal?
Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional return ticket. You could then fly to Donegal with an airline and back to Illinois with another airline.
What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Illinois to Donegal?
Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Donegal from Illinois up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.