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Cheap flights from London Heathrow Airport to Donegal from £102

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 28/10. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — CFN
16 Oct — 23 Oct1
1 adult
1 adult, Economy

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 16 September 2025.

Round-trip from

£162

One-way from

£160

Popular in

December

Cheapest in

May

Average price

£206
Aer Lingus
  • Aer Lingus
  • 10/10-13/10
  • 2 total stops
  • 9h 45m total
  • London to Donegal
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Aer Lingus
  • Aer Lingus
  • 29/10
  • 1 total stop
  • 5h 10m total
  • London to Donegal
Search Deals
Highest demand for flights based on searches. 29% potential increase in price (£89 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 10% potential price decrease (£22 potential savings vs. average return price).
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Average for round-trip flights in September 2025
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Find flight deals from Heathrow to Donegal

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 16 September 2025.

Fri 10/1015:10LHR - CFN
1 stop4h 50mAer Lingus
Mon 13/1014:30CFN - LHR
1 stop4h 55mAer Lingus
Deal found 14/9£162
Tue 28/1006:30LHR - CFN
1 stop7h 30mMultiple Airlines
Tue 4/1114:30CFN - LHR
1 stop7h 30mMultiple Airlines
Deal found 13/9£201
Thu 30/1007:50LHR - CFN
1 stop6h 10mAer Lingus
Wed 5/1107:55CFN - LHR
1 stop8h 55mAer Lingus
Deal found 13/9£202
Thu 30/1007:50LHR - CFN
1 stop6h 10mAer Lingus
Thu 6/1107:55CFN - LHR
1 stop5h 30mAer Lingus
Deal found 15/9£209
Wed 29/1008:50LHR - CFN
1 stop5h 10mAer Lingus
Wed 5/1114:30CFN - LHR
1 stop5h 20mAer Lingus
Deal found 14/9£265
Thu 9/1014:20LHR - CFN
1 stop5h 40mAer Lingus
Sun 12/1013:20CFN - LHR
1 stop18h 40mAer Lingus
Deal found 13/9£313
Thu 30/1006:30LHR - CFN
1 stop7h 30mBritish Airways
Wed 5/1107:55CFN - LHR
1 stop6h 40mBritish Airways
Deal found 14/9£358
Sun 14/909:50LHR - CFN
1 stop10h 10mAer Lingus
Mon 15/907:55CFN - LHR
1 stop4h 45mAer Lingus
Deal found 13/9£409
Sun 14/908:50LHR - CFN
1 stop4h 00mAer Lingus
Tue 16/907:55CFN - LHR
1 stop4h 45mAer Lingus
Deal found 13/9£412

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 16 September 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

Fri 10/10

15:10-20:00

1 stop4h 50m

Donegal

Mon 13/10

14:30-19:25

1 stop4h 55m

£162

LondonDonegal

LHR - CFN

LHRCFN

London Heathrow

Tue 28/10

06:30-14:00

1 stop7h 30m

Donegal

Tue 4/11

14:30-22:00

1 stop7h 30m

£201

LondonDonegal

LHR - CFN

LHRCFN

London Heathrow

Thu 30/10

07:50-14:00

1 stop6h 10m

Donegal

Wed 5/11

07:55-16:50

1 stop8h 55m

£202

LondonDonegal

LHR - CFN

LHRCFN

London Heathrow

Thu 30/10

07:50-14:00

1 stop6h 10m

Donegal

Thu 6/11

07:55-13:25

1 stop5h 30m

£209

LondonDonegal

LHR - CFN

LHRCFN

London Heathrow

Wed 29/10

08:50-14:00

1 stop5h 10m

Donegal

Wed 5/11

14:30-19:50

1 stop5h 20m

£265

LondonDonegal

LHR - CFN

LHRCFN

London Heathrow

Thu 9/10

15:10-20:00

1 stop4h 50m

Donegal

Sun 12/10

13:20-10:20

1 stop21h 00m

£318

LondonDonegal

LHR - CFN

LHRCFN

London Heathrow

Thu 30/10

06:30-14:00

1 stop7h 30m

Donegal

Wed 5/11

07:55-14:35

1 stop6h 40m

£358

LondonDonegal

LHR - CFN

LHRCFN

London Heathrow

Thu 9/10

07:40-20:00

1 stop12h 20m

Donegal

Sun 12/10

19:15-15:30

2 stops20h 15m

£454

LondonDonegal

LHR - CFN

LHRCFN

London Heathrow

Fri 10/10

06:40-20:00

2 stops13h 20m

Donegal

Mon 13/10

07:55-17:40

2 stops9h 45m

£455

LondonDonegal

LHR - CFN

LHRCFN

London Heathrow

Wed 29/10

06:40-20:00

2 stops13h 20m

Donegal

Wed 5/11

07:55-17:40

2 stops9h 45m

£487

Flights are sorted by cheapest return flights first.

Deals found on 13/9

Showing 1-10 of 14 results
1
2

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 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 16 September 2025.

It’s typically best to fly out from London Heathrow Airport to Donegal in the morning. Doing so could potentially save you 21% on the flight price compared to flying at midday, 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 16 September 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
1,270 reviews
Check prices

Crew

8.0

Comfort

7.1

Overall

7.2

Entertainment

6.9

Boarding

7.3

Food

6.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

LHR - DUB

The lack of headphones impacted our ability to enjoy the entertainment system provided. The fact that my last connection was associated with an "affiliated airline" that did not allow me to retrieve a check in or a boarding pass via the app almost posed a significant issue as the last leg of the flight was overbooked and we were stressed about getting a seat as a result.
Aer Lingus
7.2
Good
1,270 reviews
Aer Lingus
7.2
Good
1,270 reviews
Check prices

Crew

8.0

Comfort

7.1

Overall

7.2

Entertainment

6.9

Boarding

7.3

Food

6.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

LHR - DUB

The lack of headphones impacted our ability to enjoy the entertainment system provided. The fact that my last connection was associated with an "affiliated airline" that did not allow me to retrieve a check in or a boarding pass via the app almost posed a significant issue as the last leg of the flight was overbooked and we were stressed about getting a seat as a result.

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 (£169), offers the cheapest pricing from London Heathrow Airport to Donegal. You may be able to fly from London Heathrow Airport to Donegal for 42% less than the average price by searching for this airline.

  • 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.

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 16 September 2025.
AirlineCheapestAverageFlexibilityOn-time
Aer LingusCheapest£169Average£237FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

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

Cheapflights helps you search for flights from Heathrow to Donegal via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

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.

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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