In terms of precipitation, rainfall in Donegal ranges from 2.3 - 4.6 inches per month. October is typically the wettest month, when rainfall can reach 4.6 in. April is typically the driest time to visit Donegal when rainfall is around 2.3 in.

If weather is an important factor for your trip to Donegal, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 57.2 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 41.0 F).

What is the cheapest time of day to fly from IL to CFN?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Illinois to Donegal as you normally would.

What airport do you fly into for flights to Donegal from Illinois?

For a flight from Illinois to Donegal, you will be flying into Donegal. Donegal (CFN) is just 28.5 mi from the center of the city.

Can I find deals for flights from Illinois to Donegal that include hotel bookings?

Yes. In addition to deals on Illinois to Donegal flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from Illinois to Donegal?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Illinois to Donegal.

Can I find deals for business class flights from Illinois to Donegal?

Yes. Cheapflights offers flight deals from Illinois to Donegal by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$708+ Flights from Illinois to Donegal

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Cheap flight deals from Illinois to Donegal

Round-trip from	$708 (Trip.com)

From Illinois to Donegal

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Find flight deals from Illinois to Donegal

Cheapest flights from Illinois to Donegal
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 June 30, 2025.

Tue 8/127:25 pmORD - CFN

2 stops18h 35mMultiple Airlines

Tue 8/197:55 amCFN - ORD

2 stops19h 20mMultiple Airlines

Deal found 6/28

$708

Tue 8/129:15 pmORD - CFN

1 stop10h 45mAer Lingus

Tue 8/197:55 amCFN - ORD

1 stop13h 50mAer Lingus

Deal found 6/28

$720

Wed 12/38:45 pmORD - CFN

2 stops17h 15mBritish Airways

Sun 12/71:00 pmCFN - ORD

2 stops30h 55mBritish Airways

Deal found 6/27

$1,018

Best flights from Illinois to Donegal
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 June 30, 2025.

Tue 8/127:25 pmORD - CFN

2 stops18h 35mMultiple Airlines

Tue 8/197:55 amCFN - ORD

2 stops19h 20mMultiple Airlines

Deal found 6/28

$708

Tue 8/129:15 pmORD - CFN

1 stop10h 45mAer Lingus

Tue 8/197:55 amCFN - ORD

1 stop13h 50mAer Lingus

Deal found 6/28

$720

Cheapflights Fare Finder

Use the filters below to find and compare flights from Illinois to Donegal that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

ChicagoDonegal

ORD - CFN

ORDCFN

Chicago O'Hare Intl

Tue 8/12

7:25 pm-8:00 pm

2 stops18h 35m

Donegal

Tue 8/19

7:55 am-9:15 pm

2 stops19h 20m

$708

ChicagoDonegal

ORD - CFN

ORDCFN

Chicago O'Hare Intl

Tue 8/12

9:15 pm-2:00 pm

1 stop10h 45m

Donegal

Tue 8/19

7:55 am-3:45 pm

1 stop13h 50m

$720

ChicagoDonegal

ORD - CFN

ORDCFN

Chicago O'Hare Intl

Wed 12/3

8:45 pm-8:00 pm

2 stops17h 15m

Donegal

Sun 12/7

1:00 pm-1:55 pm

2 stops30h 55m

$1,018

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/28

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.

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

No data available for this route at this time. Please check back soon.

Reviews of airlines servicing Donegal

Read reviews from past customers who have flown Aer Lingus from Illinois to Donegal. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Aer Lingus

7.1

Good

1,140 reviews

Reviews

1 / 20

10.0

Excellent

Anonymous,May 2025

SEA - DUB

Most airlines board by group even though passengers are seated at the back. At Seatac, passengers were seated starting at the back. Otherwise, flight was good.

Aer Lingus

7.1

Good

1,140 reviews

Aer Lingus

7.1

Good

1,140 reviews

Reviews

1 / 20

10.0

Excellent

Anonymous,May 2025

SEA - DUB

Most airlines board by group even though passengers are seated at the back. At Seatac, passengers were seated starting at the back. Otherwise, flight was good.

Related info for your journey

What airport do you fly into for flights to Donegal from Illinois?
For a flight from Illinois to Donegal, you will be flying into Donegal. Donegal (CFN) is just 28.5 mi from the center of the city.
Can I find deals for flights from Illinois to Donegal that include hotel bookings?
Yes. In addition to deals on Illinois to Donegal flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Illinois to Donegal?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Illinois to Donegal.
Can I find deals for business class flights from Illinois to Donegal?
Yes. Cheapflights offers flight deals from Illinois to Donegal by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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$708+ 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 8/12. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Illinois to Donegal with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Illinois to Donegal

Keep the following information in mind while searching for Illinois to Donegal flight deals. Data was last updated June 30, 2025.

Round-trip from

Find flight deals from Illinois to Donegal

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 June 30, 2025.

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 June 30, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Illinois to Donegal that are best for you.

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.

Cheapflights Insights

Everything you need to know about your flight from Illinois to Donegal

Reviews of airlines servicing Donegal

Read reviews from past customers who have flown Aer Lingus from Illinois to Donegal. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from Illinois to Donegal. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

What airport do you fly into for flights to Donegal from Illinois?

Can I find deals for flights from Illinois to Donegal that include hotel bookings?

How can I find direct flights from Illinois to Donegal?

Can I find deals for business class flights from Illinois to Donegal?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Illinois to Donegal

See prices for flight routes from nearby airports that may be better suited for you.

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Book with Flexibility

Travel Smart

Cheapest flights from Illinois to Donegal
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 June 30, 2025.