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 PHL to CFN?

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

Most accurate provider : When it comes to deals on Philadelphia-Donegal flights, users find the pricing of AranGrant to be most consistent on Cheapflights vs. AranGrant Users can find the same prices on Philadelphia-Donegal flight deals on Cheapflights vs. AranGrant >95% of the time. Price accuracy is based on data collected from Philadelphia-Donegal flight searches over the past month and is updated monthly.

Most trusted provider : When it comes to deals on Philadelphia-Donegal flights, Cheapflights users trust AranGrant the most. AranGrant has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Philadelphia-Donegal flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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

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

How can I find direct flights from Philadelphia to Donegal?

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

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

Yes. Cheapflights offers flight deals from Philadelphia 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.

$447+ Cheap Flights from Philadelphia to Donegal

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Search for one-way flight options from Philadelphia to Donegal. Find affordable one-way fares based on user searches. Data last updated October 9, 2026.

Mon 2/110:41 am -

3 stops46h 19m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 10/8

$447

Mon 2/19:10 pm -

1 stop17h 50m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 10/8

$479

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Most accurate provider	AranGrant 3 stars
Most trusted provider	AranGrant 3 stars

Provider with most accurate pricing for Philadelphia-Donegal flight deals.

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PhiladelphiaDonegal

PHL Philadelphia - CFN Donegal

PHLCFN

Philadelphia

Mon 2/1

10:41 am-2:00 pm

3 stops46h 19m

Donegal

Wed 12/31

12:00 am-6:00 pm

Nonstop0h 00m

$447

Quickest round-trip

PhiladelphiaDonegal

PHL Philadelphia - CFN Donegal

PHLCFN

Philadelphia

Mon 2/1

9:10 pm-8:00 pm

1 stop17h 50m

Donegal

Wed 12/31

12:00 am-6:00 pm

Nonstop0h 00m

$479

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/8

Sorted by cheapest first

Most accurate provider: When it comes to deals on Philadelphia-Donegal flights, users find the pricing of AranGrant to be most consistent on Cheapflights vs. AranGrant Users can find the same prices on Philadelphia-Donegal flight deals on Cheapflights vs. AranGrant >95% of the time. Price accuracy is based on data collected from Philadelphia-Donegal flight searches over the past month and is updated monthly.
Most trusted provider: When it comes to deals on Philadelphia-Donegal flights, Cheapflights users trust AranGrant the most. AranGrant has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Philadelphia-Donegal flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Philadelphia to Donegal

Have a flexible travel schedule? Discover the best time to fly to Donegal from Philadelphia with our price prediction graph.

PHL-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.

Related info for your journey

Can I find deals for flights from Philadelphia to Donegal that include hotel bookings?
Yes. In addition to deals on Philadelphia to Donegal flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Philadelphia to Donegal?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Philadelphia to Donegal.
Can I find deals for business class flights from Philadelphia to Donegal?
Yes. Cheapflights offers flight deals from Philadelphia 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.

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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 2/1. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Philadelphia to Donegal with Cheapflights

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Cheap flight deals from Philadelphia to Donegal

One-way flights from Philadelphia to Donegal
Search for one-way flight options from Philadelphia to Donegal. Find affordable one-way fares based on user searches. Data last updated October 9, 2026.

Search for one-way flight options from Philadelphia to Donegal. Find affordable one-way fares based on user searches. Data last updated October 9, 2026.

Find flight deals from Philadelphia to Donegal

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

Best time to book a flight from Philadelphia to Donegal

Have a flexible travel schedule? Discover the best time to fly to Donegal from Philadelphia with our price prediction graph.

Related info for your journey

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

How can I find direct flights from Philadelphia to Donegal?

Can I find deals for business class flights from Philadelphia 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.

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Complete your trip

Complete your trip to Donegal by adding a car rental and/or hotel reservation to your travel itinerary.

Search flights from Philadelphia to Donegal by cabin class

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$447+ Cheap flights from Philadelphia (PHL) 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 2/1. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Philadelphia 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 Philadelphia to Donegal

One-way flights from Philadelphia to DonegalSearch for one-way flight options from Philadelphia to Donegal. Find affordable one-way fares based on user searches. Data last updated October 9, 2026.

Search for one-way flight options from Philadelphia to Donegal. Find affordable one-way fares based on user searches. Data last updated October 9, 2026.

Find flight deals from Philadelphia to Donegal

Most accurate provider

Most trusted provider

Cheapflights Fare Finder

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

Best time to book a flight from Philadelphia to Donegal

Have a flexible travel schedule? Discover the best time to fly to Donegal from Philadelphia with our price prediction graph.

Related info for your journey

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

How can I find direct flights from Philadelphia to Donegal?

Can I find deals for business class flights from Philadelphia 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 Philadelphia to Donegal

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

Complete your trip

Complete your trip to Donegal by adding a car rental and/or hotel reservation to your travel itinerary.

Search flights from Philadelphia to Donegal by cabin class

Find flights from Philadelphia to Donegal, based on your preferred cabin class, be it economy, premium economy, business, or first class.

Philadelphia and Donegal flights

Browse other Philadelphia and Donegal flight options. Last updated on October 9, 2026.

Other flights from Philadelphia

Browse through other flights departing from Philadelphia. Flights are based on user searches made on Cheapflights and were last updated on October 9, 2026.

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One-way flights from Philadelphia to Donegal
Search for one-way flight options from Philadelphia to Donegal. Find affordable one-way fares based on user searches. Data last updated October 9, 2026.