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Cheap flights from London Heathrow Airport to Donegal from £117

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 29/1. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — CFN
17 Jan — 24 Jan1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Heathrow to Donegal

Enter your travel dates to find the best prices.

Best flights from Heathrow to Donegal
Discover carefully curated flight deals from Heathrow to Donegal that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 18 December 2025.

Sat 31/115:15LHR - CFN
2 stops21h 20mMultiple Airlines
Sat 7/214:30CFN - LHR
1 stop5h 20mMultiple Airlines
Deal found 17/12£203
Sat 31/108:50LHR - CFN
1 stop5h 10mAer Lingus
Sat 7/207:55CFN - LHR
1 stop7h 40mAer Lingus
Deal found 17/12£215
Sat 21/206:30LHR - CFN
1 stop13h 30mBritish Airways
Wed 25/207:55CFN - LHR
1 stop4h 00mBritish Airways
Deal found 15/12£387
Thu 1/115:10LHR - CFN
1 stop4h 50mAer Lingus
Sun 4/110:00CFN - LHR
1 stop6h 50mAer Lingus
Deal found 16/12£345
Fri 1/506:35LHR - CFN
1 stop3h 35mMultiple Airlines
Fri 8/510:40CFN - LHR
1 stop7h 45mMultiple Airlines
Deal found 16/12£408
Thu 1/106:00LHR - CFN
2 stops14h 00mMultiple Airlines
Sun 4/110:00CFN - LHR
2 stops8h 45mMultiple Airlines
Deal found 16/12£488

Find 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 18 December 2025.

Round-trip from

£221

One-way from

£117
Aer Lingus
  • Aer Lingus
  • 29/1-5/2
  • 2 total stops
  • 10h 10m total
  • London to Donegal
Search Deals
29/1
  • 29/1
  • 2 total stops
  • 17h 10m total
  • London to Donegal
Search Deals

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 18 December 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

Sat 31/1

15:15-12:35

2 stops21h 20m

Donegal

Sat 7/2

14:30-19:50

1 stop5h 20m

£203

LondonDonegal

LHR - CFN

LHRCFN

London Heathrow

Sat 31/1

08:50-14:00

1 stop5h 10m

Donegal

Sat 7/2

07:55-15:35

1 stop7h 40m

£215

LondonDonegal

LHR - CFN

LHRCFN

London Heathrow

Thu 1/1

15:10-20:00

1 stop4h 50m

Donegal

Sun 4/1

10:00-16:50

1 stop6h 50m

£345

LondonDonegal

LHR - CFN

LHRCFN

London Heathrow

Sat 21/2

06:30-20:00

1 stop13h 30m

Donegal

Wed 25/2

07:55-11:55

1 stop4h 00m

£387

LondonDonegal

LHR - CFN

LHRCFN

London Heathrow

Fri 1/5

06:35-10:10

1 stop3h 35m

Donegal

Fri 8/5

10:40-18:25

1 stop7h 45m

£408

LondonDonegal

LHR - CFN

LHRCFN

London Heathrow

Thu 1/1

06:00-20:00

2 stops14h 00m

Donegal

Sun 4/1

10:00-18:45

2 stops8h 45m

£488

LondonDonegal

LHR - CFN

LHRCFN

London Heathrow

Thu 29/1

20:50-14:00

2 stops17h 10m

£117

LondonDonegal

LHR - CFN

LHRCFN

London Heathrow

Thu 29/1

09:50-20:00

1 stop10h 10m

£119

Flights are sorted by cheapest return flights first.

Deals found on 16/12

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 £119). 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 18 December 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 18 December 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
1,397 reviews
Check prices

Overall

7.2

Boarding

7.4

Crew

8.0

Comfort

7.1

Food

6.6

Entertainment

6.9

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
1,397 reviews
Aer Lingus
7.2
Good
1,397 reviews
Check prices

Overall

7.2

Boarding

7.4

Crew

8.0

Comfort

7.1

Food

6.6

Entertainment

6.9

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 and British Airways fly from London Heathrow Airport to Donegal in about 5h 10m. The time it takes to get you to your destination can typically vary by up to 8h 20m. Airlines will cover a distance of 408 mi. Both multi-stop and direct flights can be found to your destination and back.

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

    According to our current data, Aer Lingus (£172), 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 £119). 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 18 December 2025.
AirlineCheapestAverageFlexibilityOn-time
Aer LingusCheapest£172Average£270FlexibilityNo 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?

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Donegal from Heathrow.

Can Cheapflights find flights from Heathrow to Donegal with no change fees?

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

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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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