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Cheap flights from London Heathrow Airport to Donegal from £246

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/12. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — CFN
14 dic — 21 dic1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Heathrow to Donegal

Discover tips and strategies to find the most affordable flight options for your journey from Heathrow (LHR) to Donegal (CFN). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 14 novembre 2025.

Round-trip from

£246
Aer Lingus
  • Aer Lingus
  • 11/12-14/12
  • 2 total stops
  • 11h 40m total
  • London to Donegal
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Find flight deals from Heathrow to Donegal

Enter your travel dates to find the best prices.

Cheapest flights from Heathrow to Donegal
Explore the most affordable flight options available from Heathrow to Donegal. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 14 novembre 2025.

gio 11/1215:10LHR - CFN
1 stop4h 50mAer Lingus
dom 14/1210:00CFN - LHR
1 stop6h 50mAer Lingus
Deal found 12/11£246
sab 27/1207:50LHR - CFN
1 stop6h 10mAer Lingus
sab 3/114:30CFN - LHR
1 stop18h 35mAer Lingus
Deal found 12/11£277
dom 28/1207:50LHR - CFN
1 stop12h 10mAer Lingus
dom 4/113:00CFN - LHR
1 stop4h 50mAer Lingus
Deal found 13/11£279
dom 28/1214:15LHR - CFN
1 stop5h 45mMultiple Airlines
dom 4/119:15CFN - LHR
2 stops12h 50mMultiple Airlines
Deal found 13/11£318
gio 11/1220:45LHR - CFN
1 stop23h 15mMultiple Airlines
dom 14/1219:15CFN - LHR
2 stops20h 15mMultiple Airlines
Deal found 12/11£427
sab 27/1222:35LHR - CFN
2 stops14h 00mMultiple Airlines
sab 3/114:30CFN - LHR
1 stop6h 35mMultiple Airlines
Deal found 12/11£590

Cheapflights Fare Finder

 
Customise your flight search to find flights from Heathrow to Donegal that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 14 novembre 2025.
Use the filters below to find and compare flights from London Heathrow Airport to Donegal that are best for you.

Fly from

Heathrow

Fly to

Donegal

Route

Depart

Return

Price

LondonDonegal

LHR - CFN

LHRCFN

London Heathrow

gio 11/12

15:10-20:00

1 stop4h 50m

Donegal

dom 14/12

10:00-16:50

1 stop6h 50m

£246

LondonDonegal

LHR - CFN

LHRCFN

London Heathrow

sab 27/12

07:50-14:00

1 stop6h 10m

Donegal

sab 3/1

14:30-09:05

1 stop18h 35m

£277

LondonDonegal

LHR - CFN

LHRCFN

London Heathrow

dom 28/12

07:50-20:00

1 stop12h 10m

Donegal

dom 4/1

13:00-17:50

1 stop4h 50m

£279

LondonDonegal

LHR - CFN

LHRCFN

London Heathrow

gio 11/12

20:45-20:00

1 stop23h 15m

Donegal

dom 14/12

19:15-15:30

2 stops20h 15m

£427

LondonDonegal

LHR - CFN

LHRCFN

London Heathrow

dom 28/12

14:15-20:00

1 stop5h 45m

Donegal

dom 4/1

19:15-17:00

3 stops21h 45m

£429

LondonDonegal

LHR - CFN

LHRCFN

London Heathrow

sab 27/12

22:35-12:35

2 stops14h 00m

Donegal

sab 3/1

14:30-21:05

1 stop6h 35m

£590

Flights are sorted by cheapest return flights first.

Deals found on 12/11

Best time to book a flight from Heathrow to Donegal

Have a flexible travel schedule? Discover the best time to fly to Donegal from Heathrow with our price prediction graph.
Estimated return 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 London Heathrow Airport to Donegal

What is the cheapest month to book a flight from London Heathrow Airport to Donegal?

Currently, February is the cheapest month in which you can book a flight from London Heathrow Airport to Donegal (average of £72). Flying from London Heathrow Airport to Donegal in August is currently the most expensive (average of £121). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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

Find hourly flight availability from Heathrow to Donegal. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 14 novembre 2025.

It’s typically best to fly out from London Heathrow Airport to Donegal in the evening. Doing so could potentially save you 21% on the flight price compared to flying in the afternoon, which is usually more expensive.

Reviews of airlines servicing Donegal

Get insights into the airlines that provide service to Donegal. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Donegal. Reviews last updated 14 novembre 2025.
Read through reviews of airlines operating flights from London Heathrow Airport to Donegal, such as Aer Lingus. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Aer Lingus
7.2
Good
1,370 reviews
Check prices

Entertainment

6.9

Crew

8.0

Overall

7.2

Comfort

7.1

Boarding

7.4

Food

6.6

Reviews

1 / 20
6.0
Good

David,Oct 2025

LIS - DUB

Two issues... 1. The Aer Lingus check-in counter in Lisbon did not open until 90 minutes prior to the flight. Huge line of customers waiting to check-in and very time consuming. Plus, having to clear security, passport control, and take the shuttle bus to the plane takes a long time. Consequently, the flight was delayed due to passengers not being able to get to the gate on time. I showed up four hours early but had to wait for over two hours just for the check-in counter to open. Many passengers complaining about the same issue. VERY STRESSFUL! 2. During the flight one of the flight attendants (Glen) was quite rude to a parent of a non-verbal autistic child. At one point I heard him say in a nasty tone, "You have three seconds to put your bag under the seat or I will take it and check it. 3, 2, 1!" I did not speak to the flight attendant because I was afraid he would kick me off the flight. Very unpleasant to everyone before take off also while instructing them to put the seats up and bags under. A little interpersonal communication training could help this man. Other than those two issues, the flight was fine.
Aer Lingus
7.2
Good
1,370 reviews
Aer Lingus
7.2
Good
1,370 reviews
Check prices

Entertainment

6.9

Crew

8.0

Overall

7.2

Comfort

7.1

Boarding

7.4

Food

6.6

Reviews

1 / 20
6.0
Good

David,Oct 2025

LIS - DUB

Two issues... 1. The Aer Lingus check-in counter in Lisbon did not open until 90 minutes prior to the flight. Huge line of customers waiting to check-in and very time consuming. Plus, having to clear security, passport control, and take the shuttle bus to the plane takes a long time. Consequently, the flight was delayed due to passengers not being able to get to the gate on time. I showed up four hours early but had to wait for over two hours just for the check-in counter to open. Many passengers complaining about the same issue. VERY STRESSFUL! 2. During the flight one of the flight attendants (Glen) was quite rude to a parent of a non-verbal autistic child. At one point I heard him say in a nasty tone, "You have three seconds to put your bag under the seat or I will take it and check it. 3, 2, 1!" I did not speak to the flight attendant because I was afraid he would kick me off the flight. Very unpleasant to everyone before take off also while instructing them to put the seats up and bags under. A little interpersonal communication training could help this man. Other than those two issues, the flight was fine.

Related info for your journey

Find useful and relevant information for your journey from Heathrow 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 London Heathrow?

    Donegal (CFN) is the airport you will fly into if you book a flight from London Heathrow to Donegal. You should not have trouble finding flights to Donegal from London Heathrow; the airport handles an average of 0 inbound flights from London Heathrow per day. You should also have plenty of airline options to choose from since 1 airline has flights to the Donegal airport from London Heathrow. It is only a 28.5 mi journey from Donegal (CFN) to Donegal’s city center.

  • How long is the flight from London Heathrow Airport to Donegal?

    Airlines like Aer Lingus fly from London Heathrow Airport to Donegal in about 4h 50m. The time it takes to get you to your destination can typically vary by up to . Airlines will cover a distance of 408 mi.

  • What is the cheapest airline to fly from London Heathrow Airport to Donegal round-trip?

    According to our current data, Aer Lingus (£175), offers the cheapest pricing from London Heathrow Airport to Donegal.

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

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

  • How can I find direct flights from Heathrow to Donegal?

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

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

    Yes. Cheapflights offers flight deals from Heathrow 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.

  • What is the cheapest month to book a flight from London Heathrow Airport to Donegal?

    Currently, February is the cheapest month in which you can book a flight from London Heathrow Airport to Donegal (average of £72). Flying from London Heathrow Airport to Donegal in August is currently the most expensive (average of £121). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Travelling to a place near Donegal?

Book flights to Donegal if you plan to visit one of these locations
Bundoran
Letterkenny
Killybegs

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Alternative routes for Heathrow to Donegal

See prices for flight routes from nearby airports that may be better suited for you.
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Top airline flying from Heathrow to Donegal

Discover the top airline that operate flights from Heathrow to Donegal. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 14 novembre 2025.
AirlineCheapestAverageFlexibilityOn-time
Aer LingusCheapest£175Average£294FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights

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How does Cheapflights help users find flights from Heathrow to Donegal?

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Why should you use Cheapflights to find cheap flight tickets from Heathrow to Donegal?

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Users can book flights with no change fees policies with our dedicated filters. Book flights from Heathrow to Donegal flexibly with Cheapflights today.

Can Cheapflights notify me if prices for flights from Heathrow to Donegal become cheaper?

Not ready to book yet? You can track prices for flights from Heathrow to Donegal on Cheapflights with our Price Alert feature and get notified when better prices are available.

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