$208 Cheap Flights from Donegal (CFN) to London (LHR)

View $208 flight on Wed, Jan 28, 2026Opens in a new window

Popular airlines from Donegal (CFN) to Heathrow Airport (LHR)

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Cheap Flights from Donegal to London (CFN-LHR)

Prices were available within the past 7 days and start at $208 for one-way flights and $437 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Aer Lingus
Wed, Jan 28 - Wed, Feb 4
CFN
Donegal
LHR
London
$437 Roundtrip, found 2 hours ago
$437
Roundtrip
found 2 hours ago
Select Aer Lingus flight, departing Wed, Jan 28 from Donegal to London, returning Wed, Feb 4, priced at $437 found 2 hours ago
Aer Lingus
Wed, Jan 28 - Wed, Feb 4
CFN
Donegal
LHR
London
$441 Roundtrip, found 2 hours ago
$441
Roundtrip
found 2 hours ago
Select Aer Lingus flight, departing Wed, Jan 28 from Donegal to London, returning Wed, Feb 4, priced at $441 found 2 hours ago
Aer Lingus
Wed, Jan 28 - Wed, Feb 4
CFN
Donegal
LHR
London
$445 Roundtrip, found 2 hours ago
$445
Roundtrip
found 2 hours ago
Select Aer Lingus flight, departing Wed, Jan 28 from Donegal to London, returning Wed, Feb 4, priced at $445 found 2 hours ago
Aer Lingus
Wed, Jan 28 - Wed, Feb 4
CFN
Donegal
LHR
London
$448 Roundtrip, found 2 hours ago
$448
Roundtrip
found 2 hours ago
Select Aer Lingus flight, departing Wed, Jan 28 from Donegal to London, returning Wed, Feb 4, priced at $448 found 2 hours ago
Aer Lingus
Wed, Jan 28 - Wed, Feb 4
CFN
Donegal
LHR
London
$452 Roundtrip, found 2 hours ago
$452
Roundtrip
found 2 hours ago
Select Aer Lingus flight, departing Wed, Jan 28 from Donegal to London, returning Wed, Feb 4, priced at $452 found 2 hours ago
Aer Lingus
Wed, Jan 28 - Wed, Feb 4
CFN
Donegal
LHR
London
$456 Roundtrip, found 2 hours ago
$456
Roundtrip
found 2 hours ago
Select Aer Lingus flight, departing Wed, Jan 28 from Donegal to London, returning Wed, Feb 4, priced at $456 found 2 hours ago
Aer Lingus
Wed, Jan 28 - Wed, Feb 4
CFN
Donegal
LHR
London
$493 Roundtrip, found 2 hours ago
$493
Roundtrip
found 2 hours ago
Select Aer Lingus flight, departing Wed, Jan 28 from Donegal to London, returning Wed, Feb 4, priced at $493 found 2 hours ago
Aer Lingus
Wed, Jan 28 - Wed, Feb 4
CFN
Donegal
LHR
London
$496 Roundtrip, found 2 hours ago
$496
Roundtrip
found 2 hours ago
Select Aer Lingus flight, departing Wed, Jan 28 from Donegal to London, returning Wed, Feb 4, priced at $496 found 2 hours ago
Aer Lingus
Wed, Jan 28 - Wed, Feb 4
CFN
Donegal
LHR
London
$500 Roundtrip, found 2 hours ago
$500
Roundtrip
found 2 hours ago
Select Aer Lingus flight, departing Wed, Jan 28 from Donegal to London, returning Wed, Feb 4, priced at $500 found 2 hours ago
British Airways
Wed, Jan 28 - Wed, Feb 4
CFN
Donegal
LHR
London
$509 Roundtrip, found 2 hours ago
$509
Roundtrip
found 2 hours ago
Select British Airways flight, departing Wed, Jan 28 from Donegal to London, returning Wed, Feb 4, priced at $509 found 2 hours ago
Flights from Donegal (CFN) to London (LHR)
Origin airport
Donegal
Destination airport
Heathrow
Airlines serving
Aer Lingus, British Airways
Roundtrip price
$437
Distance
408 mi

Donegal to London Flights

The cheapest times to fly from Donegal to London

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 Donegal to London are during the month of January. You can find some of the cheapest flights from Donegal to London with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Donegal to London

Sunday is one of the best days to book for cheap flights from Donegal to London: 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 Donegal to London

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 Donegal to London in 2026. You can also book with separate airlines for your outbound and return journeys, from $208 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 Donegal to London 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 Donegal to London 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 Donegal Airport (CFN) to Heathrow Airport (LHR) cost?
Get a cheap one-way flight from $208 or cheap return flight from $437 from Donegal Airport (CFN) to Heathrow Airport (LHR) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight offers on this route.
What is the cheapest month to fly from Donegal Airport (CFN) to Heathrow Airport (LHR)?
The cheapest month to fly from CFN to LHR is January, when there's less demand. Off-peak season is often when better flight deals are available between these airports.
What is the cheapest airline that flies from Donegal Airport (CFN) to Heathrow Airport (LHR)?
Expedia's filter tool lets you easily compare airlines, flight times and baggage options all in one place. Select your preferences, then sort by "Price (lowest to highest)" to see which carrier offers the cheapest CFN to LHR flight.
How many flights per day from Donegal Airport (CFN) to Heathrow Airport (LHR)?
There are no daily direct flights from Donegal Airport (CFN) to Heathrow Airport (LHR). But you can book flights with layovers. Filter your search on Expedia to include one or more stops, and you'll be cruising above the clouds in no time.
What day of the week has the most flights from CFN to LHR?
Friday is generally the busiest day for flights, while Tuesday tends to be the quietest.* Remember that flight schedules can change depending on a number of factors, such as the carrier 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 Donegal Airport (CFN) to Heathrow Airport (LHR)?
To land at Heathrow Airport (LHR) without delays, opt for a flight that takes off from Donegal Airport (CFN) before 3 PM. The likelihood of cancellations is 22% higher, on average, for departures after this hour.**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 Donegal Airport (CFN) to Heathrow Airport (LHR) last-minute?
Last-minute bookings from CFN to LHR are usually more expensive. To lock in the cheapest rates, start searching for flights well ahead of time. That being said, if you're flexible with your travel plans, it's possible to find a cheap fare right before your journey.
Is it cheaper to book a CFN to LHR flight and hotel package?
You'll typically save money by booking a CFN to LHR flight and hotel package compared to booking separately. In fact, you could save hundreds of dollars by bundling with Expedia. And it's simple to manage it all in one place. After choosing your preferred flights and accommodations, consider other add-ons like tours, activities and car rentals.
Can I cancel or change the date of my flight from Donegal Airport (CFN) to Heathrow Airport (LHR)?
In most instances, you're able to reschedule or cancel your CFN to LHR flight. However, there may be additional fees, especially if you made your booking more than 24 hours ago. Check your itinerary for the airline's fees and guidelines on flight changes, or if you'd like further information, visit our Customer Service portal.

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*Available to One Key members.