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Cheap flights from London Heathrow Airport to Donegal from £159

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 19/12. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — CFN
29 Aug — 5 Sep1
1 adult
1 adult, Economy, 0 bags

Cheap 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 30 July 2026.

Sat 10/1007:40
LHR
-
CFN
1 stop12h 20m
Aer Lingus
Mon 12/1014:30
CFN
-
LHR
1 stop5h 50m
Aer Lingus
Deal found 25/7£198
Wed 9/915:50
LHR
-
CFN
1 stop4h 10m
Aer Lingus
Wed 16/914:30
CFN
-
LHR
1 stop4h 25m
Aer Lingus
Deal found 26/7£203
Fri 11/915:50
LHR
-
CFN
1 stop4h 10m
Aer Lingus
Fri 18/914:30
CFN
-
LHR
1 stop4h 25m
Aer Lingus
Deal found 27/7£205
Thu 10/915:10
LHR
-
CFN
1 stop4h 50m
Aer Lingus
Thu 17/914:30
CFN
-
LHR
1 stop4h 25m
Aer Lingus
Deal found 27/7£211
Wed 12/815:50
LHR
-
CFN
1 stop4h 10m
Aer Lingus
Sat 15/814:30
CFN
-
LHR
1 stop3h 50m
Aer Lingus
Deal found 29/7£225
Thu 27/815:50
LHR
-
CFN
1 stop4h 10m
Aer Lingus
Tue 1/914:30
CFN
-
LHR
1 stop18h 35m
Aer Lingus
Deal found 28/7£226
Thu 13/815:10
LHR
-
CFN
1 stop4h 50m
Aer Lingus
Mon 17/807:55
CFN
-
LHR
1 stop11h 00m
Aer Lingus
Deal found 28/7£227
Tue 8/915:10
LHR
-
CFN
1 stop4h 50m
Aer Lingus
Tue 15/914:30
CFN
-
LHR
1 stop4h 25m
Aer Lingus
Deal found 29/7£228
Fri 28/815:50
LHR
-
CFN
1 stop4h 10m
Aer Lingus
Fri 4/914:30
CFN
-
LHR
1 stop4h 25m
Aer Lingus
Deal found 28/7£236
Thu 13/815:50
LHR
-
CFN
1 stop4h 10m
Aer Lingus
Sun 16/814:30
CFN
-
LHR
1 stop17h 35m
Aer Lingus
Deal found 29/7£240

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 30 July 2026.

Round-trip from

£198

One-way from

£159
Aer Lingus
  • Aer Lingus
  • 22/8-29/8
  • 2 total stops
  • 9h 05m total
  • London to Donegal
Search Deals
Aer Lingus
  • Aer Lingus
  • 19/12
  • 1 total stop
  • 11h 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 30 July 2026.
Use the filters below to find and compare flights from London Heathrow Airport to Donegal that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonDonegal

LHR - CFN

LHRCFN

London Heathrow

Thu 10/9

07:40-20:00

1 stop12h 20m

Donegal

Thu 17/9

07:55-18:55

1 stop11h 00m

£203
Fastest return journey

LondonDonegal

LHR - CFN

LHRCFN

London Heathrow

Wed 12/8

15:50-20:00

1 stop4h 10m

Donegal

Sat 15/8

14:30-18:20

1 stop3h 50m

£225

LondonDonegal

LHR - CFN

LHRCFN

London Heathrow

Tue 8/9

15:10-20:00

1 stop4h 50m

Donegal

Tue 15/9

14:30-18:55

1 stop4h 25m

£228

LondonDonegal

LHR - CFN

LHRCFN

London Heathrow

Wed 23/12

08:50-14:00

1 stop5h 10m

Donegal

Sun 27/12

08:00-13:25

1 stop5h 25m

£263

LondonDonegal

LHR - CFN

LHRCFN

London Heathrow

Tue 22/12

14:15-20:00

1 stop5h 45m

Donegal

Sat 26/12

14:30-19:50

1 stop5h 20m

£285

LondonDonegal

LHR - CFN

LHRCFN

London Heathrow

Mon 12/10

06:20-14:00

1 stop7h 40m

Donegal

Fri 16/10

14:30-21:25

1 stop6h 55m

£385

LondonDonegal

LHR - CFN

LHRCFN

London Heathrow

Tue 22/12

06:30-20:00

1 stop13h 30m

Donegal

Wed 23/12

14:30-22:00

1 stop7h 30m

£394

LondonDonegal

LHR - CFN

LHRCFN

London Heathrow

Tue 6/10

06:20-14:00

1 stop7h 40m

Donegal

Thu 8/10

14:30-14:20

1 stop23h 50m

£416
Cheapest one-way
Fastest single journey

LondonDonegal

LHR - CFN

LHRCFN

London Heathrow

Sat 19/12

08:50-20:00

1 stop11h 10m

£159

LondonDonegal

LHR - CFN

LHRCFN

London Heathrow

Sat 19/12

20:45-18:45

2 stops22h 00m

£426

Flights are sorted by cheapest return flights first.

Deals found on 26/7

Sorted by cheapest first

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.

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 0 airlines have 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 12h 20m. The time it takes to get you to your destination can typically vary by up to . Airlines will cover a distance of 408 mi.

  • 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
Letterkenny
Bundoran
Killybegs

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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.

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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