$306 Cheap Flights from Boston (BOS) to Donegal (CFN)

View $306 flight on Wed, Dec 10, 2025Opens in a new window

Popular airlines from Logan International Airport (BOS) to Donegal (CFN)

Cheap Flights from Boston to Donegal (BOS-CFN)

Prices were available within the past 7 days and start at $306 for one-way flights and $455 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Aer Lingus
Mon, Nov 10 - Mon, Nov 17
BOS
Boston
CFN
Donegal
$455 Roundtrip, found 5 days ago
$455
Roundtrip
found 5 days ago
Select Aer Lingus flight, departing Mon, Nov 10 from Boston to Donegal, returning Mon, Nov 17, priced at $455 found 5 days ago
Aer Lingus
Wed, Nov 12 - Sun, Nov 16
BOS
Boston
CFN
Donegal
$456 Roundtrip, found 5 days ago
$456
Roundtrip
found 5 days ago
Select Aer Lingus flight, departing Wed, Nov 12 from Boston to Donegal, returning Sun, Nov 16, priced at $456 found 5 days ago
Aer Lingus
Mon, Nov 10 - Mon, Nov 17
BOS
Boston
CFN
Donegal
$462 Roundtrip, found 5 days ago
$462
Roundtrip
found 5 days ago
Select Aer Lingus flight, departing Mon, Nov 10 from Boston to Donegal, returning Mon, Nov 17, priced at $462 found 5 days ago
Aer Lingus
Wed, Nov 12 - Sun, Nov 16
BOS
Boston
CFN
Donegal
$475 Roundtrip, found 5 days ago
$475
Roundtrip
found 5 days ago
Select Aer Lingus flight, departing Wed, Nov 12 from Boston to Donegal, returning Sun, Nov 16, priced at $475 found 5 days ago
Aer Lingus
Wed, Nov 12 - Sun, Nov 16
BOS
Boston
CFN
Donegal
$483 Roundtrip, found 5 days ago
$483
Roundtrip
found 5 days ago
Select Aer Lingus flight, departing Wed, Nov 12 from Boston to Donegal, returning Sun, Nov 16, priced at $483 found 5 days ago
Aer Lingus
Mon, Jan 5 - Thu, Jan 8
BOS
Boston
CFN
Donegal
$540 Roundtrip, found 4 days ago
$540
Roundtrip
found 4 days ago
Select Aer Lingus flight, departing Mon, Jan 5 from Boston to Donegal, returning Thu, Jan 8, priced at $540 found 4 days ago
Aer Lingus
Fri, Nov 14 - Mon, Nov 17
BOS
Boston
CFN
Donegal
$542 Roundtrip, found 4 days ago
$542
Roundtrip
found 4 days ago
Select Aer Lingus flight, departing Fri, Nov 14 from Boston to Donegal, returning Mon, Nov 17, priced at $542 found 4 days ago
Iberia
Mon, Dec 8 - Sun, Dec 14
BOS
Boston
CFN
Donegal
$682 Roundtrip, found 1 hour ago
$682
Roundtrip
found 1 hour ago
Select Iberia flight, departing Mon, Dec 8 from Boston to Donegal, returning Sun, Dec 14, priced at $682 found 1 hour ago
Finnair
Mon, Dec 8 - Sun, Dec 14
BOS
Boston
CFN
Donegal
$691 Roundtrip, found 1 hour ago
$691
Roundtrip
found 1 hour ago
Select Finnair flight, departing Mon, Dec 8 from Boston to Donegal, returning Sun, Dec 14, priced at $691 found 1 hour ago
British Airways
Mon, Dec 8 - Sun, Dec 14
BOS
Boston
CFN
Donegal
$717 Roundtrip, found 1 hour ago
$717
Roundtrip
found 1 hour ago
Select British Airways flight, departing Mon, Dec 8 from Boston to Donegal, returning Sun, Dec 14, priced at $717 found 1 hour ago
Flights from Boston (BOS) to Donegal (CFN)
Origin airport
Logan Intl.
Destination airport
Donegal
Airlines serving
Aer Lingus, British Airways
Roundtrip price
$454
Distance
2881 mi

Boston to Donegal Flights

The cheapest times to fly from Boston to Donegal

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Boston to Donegal are during the month of November. You can find some of the cheapest flights from Boston to Donegal with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Boston to Donegal

Sunday is one of the best days to book for cheap flights from Boston to Donegal: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Boston to Donegal

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Boston to Donegal in 2025. You can also book with separate airlines for your outbound and return journeys, from $306 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Boston to Donegal flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Boston to Donegal airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Logan Intl. Airport (BOS) to Donegal Airport (CFN) cost?
Lock in a cheap one-way flight from $306 or cheap return flight from $455 from Logan Intl. Airport (BOS) to Donegal Airport (CFN) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight offers on this route.
What is the cheapest month to fly from Logan Intl. Airport (BOS) to Donegal Airport (CFN)?
The cheapest month to fly from BOS to CFN is November, when demand is low. Off-peak months are typically when airlines offer better prices between these airports.
What is the cheapest airline that flies from Logan Intl. Airport (BOS) to Donegal Airport (CFN)?
To find the cheapest airline flying from BOS to CFN, use Expedia's filter tool. Customize your search based on what matters most to you, such as preferred carriers and seat class. You can then sort your results by "Price (lowest to highest)" to discover the cheapest flight right away.
How many flights per day from Logan Intl. Airport (BOS) to Donegal Airport (CFN)?
You'll have to book a flight with a layover if you're traveling from Logan Intl. Airport (BOS) to Donegal Airport (CFN). There are no daily direct flights on this route. However, just filter your search to include one or more stops to find the best option for your trip.
What day of the week has the most flights from BOS to CFN?
Friday is usually the busiest day for flights, while Tuesday is often the quietest.* Just remember that flight schedules can vary depending on a range of factors, including the airline and season.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Logan Intl. Airport (BOS) to Donegal Airport (CFN)?
To avoid potential delays on the Logan Intl. Airport (BOS) to Donegal Airport (CFN) route, travel before 3 PM. Departures after this hour are 22% more likely to be canceled.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Logan Intl. Airport (BOS) to Donegal Airport (CFN) last-minute?
Waiting until just before your trip to book your flight from BOS to CFN often results in higher prices. While you may find some last-minute deals, they're not always guaranteed. Keep your travel schedule open to maximize your chances of scoring a bargain.
Is it cheaper to book a BOS to CFN flight and hotel package?
Opting for a BOS to CFN flight and hotel package tends to be cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your trip in one place. Select from our extensive range of accommodations and then add car rentals, flights and activities to your booking. Bundle it all together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Logan Intl. Airport (BOS) to Donegal Airport (CFN)?
Usually, it's possible to cancel or reschedule your BOS to CFN flight. However, if the booking was made more than 24 hours ago, additional fees may apply. Check your airline's policies in your itinerary to see what changes are allowed and whether any costs are involved. You'll also find further details on our Customer Service portal.

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*Available to One Key members.