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Cheap flights from London Heathrow Airport to Donegal from £125

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 8/7. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — CFN
9 Jul — 16 Jul1
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 9 June 2026.

Sat 22/815:50
LHR
-
CFN
1 stop4h 10m
Aer Lingus
Sat 29/814:30
CFN
-
LHR
1 stop5h 50m
Aer Lingus
Deal found 7/6£199
Sat 15/815:50
LHR
-
CFN
1 stop4h 10m
Aer Lingus
Sun 23/814:30
CFN
-
LHR
1 stop17h 35m
Aer Lingus
Deal found 5/6£202
Mon 20/720:10
LHR
-
CFN
1 stop17h 50m
Aer Lingus
Mon 27/714:30
CFN
-
LHR
1 stop4h 25m
Aer Lingus
Deal found 5/6£206
Thu 16/715:10
LHR
-
CFN
1 stop4h 50m
Aer Lingus
Thu 23/707:55
CFN
-
LHR
1 stop12h 25m
Aer Lingus
Deal found 6/6£215
Thu 2/707:40
LHR
-
CFN
1 stop6h 20m
Aer Lingus
Wed 8/707:55
CFN
-
LHR
1 stop6h 00m
Aer Lingus
Deal found 9/6£218
Wed 1/715:10
LHR
-
CFN
1 stop4h 50m
Aer Lingus
Wed 8/707:55
CFN
-
LHR
1 stop5h 35m
Aer Lingus
Deal found 6/6£220
Tue 7/715:50
LHR
-
CFN
1 stop4h 10m
Aer Lingus
Sun 12/714:30
CFN
-
LHR
1 stop18h 35m
Aer Lingus
Deal found 5/6£235
Sat 13/607:40
LHR
-
CFN
1 stop12h 20m
Aer Lingus
Thu 18/607:55
CFN
-
LHR
1 stop6h 00m
Aer Lingus
Deal found 8/6£253

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 9 June 2026.

Round-trip from

£199

One-way from

£125
Aer Lingus
  • Aer Lingus
  • 22/8-29/8
  • 2 total stops
  • 10h 00m total
  • London to Donegal
Search Deals
Aer Lingus
  • Aer Lingus
  • 8/7
  • 1 total stop
  • 22h 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 9 June 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

Mon 20/7

20:10-14:00

1 stop17h 50m

Donegal

Mon 27/7

14:30-18:55

1 stop4h 25m

£206
Fastest return journey

LondonDonegal

LHR - CFN

LHRCFN

London Heathrow

Sat 15/8

15:50-20:00

1 stop4h 10m

Donegal

Sat 22/8

14:30-18:20

1 stop3h 50m

£218

LondonDonegal

LHR - CFN

LHRCFN

London Heathrow

Wed 1/7

15:10-20:00

1 stop4h 50m

Donegal

Wed 8/7

07:55-13:30

1 stop5h 35m

£229

LondonDonegal

LHR - CFN

LHRCFN

London Heathrow

Mon 17/8

15:50-20:00

1 stop4h 10m

Donegal

Thu 20/8

14:30-20:20

1 stop5h 50m

£272

LondonDonegal

LHR - CFN

LHRCFN

London Heathrow

Sun 5/7

08:40-14:00

2 stops29h 20m

Donegal

Sun 12/7

07:55-07:40

2 stops23h 45m

£377

LondonDonegal

LHR - CFN

LHRCFN

London Heathrow

Thu 23/7

06:20-14:00

1 stop7h 40m

Donegal

Wed 29/7

14:30-21:45

1 stop7h 15m

£379

LondonDonegal

LHR - CFN

LHRCFN

London Heathrow

Thu 3/12

06:30-14:00

1 stop7h 30m

Donegal

Mon 7/12

08:00-12:20

1 stop4h 20m

£381

LondonDonegal

LHR - CFN

LHRCFN

London Heathrow

Wed 22/7

06:15-14:00

1 stop7h 45m

Donegal

Wed 29/7

14:30-21:45

1 stop7h 15m

£381

LondonDonegal

LHR - CFN

LHRCFN

London Heathrow

Thu 16/7

06:20-14:00

1 stop7h 40m

Donegal

Thu 23/7

14:30-21:35

1 stop7h 05m

£383
Cheapest one-way
Fastest single journey

LondonDonegal

LHR - CFN

LHRCFN

London Heathrow

Wed 8/7

15:50-14:00

1 stop22h 10m

£125

Flights are sorted by cheapest return flights first.

Deals found on 8/6

Showing 1-10 of 11 resultsSorted by cheapest first
1
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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 17h 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.

  • 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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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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