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Cheap flights from London Heathrow Airport to Donegal from £123

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 25/5. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — CFN
16 Jun — 23 Jun1
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 17 May 2026.

Sat 6/615:50
LHR
-
CFN
1 stop4h 10m
Aer Lingus
Mon 8/614:30
CFN
-
LHR
1 stop4h 55m
Aer Lingus
Deal found 14/5£217
Wed 12/815:10
LHR
-
CFN
1 stop4h 50m
Aer Lingus
Mon 31/807:55
CFN
-
LHR
1 stop5h 35m
Aer Lingus
Deal found 13/5£234
Wed 10/615:10
LHR
-
CFN
1 stop4h 50m
Aer Lingus
Sun 14/614:30
CFN
-
LHR
1 stop6h 25m
Aer Lingus
Deal found 12/5£237
Mon 1/607:40
LHR
-
CFN
1 stop6h 20m
Aer Lingus
Tue 9/607:55
CFN
-
LHR
1 stop9h 25m
Aer Lingus
Deal found 16/5£251
Fri 12/615:10
LHR
-
CFN
1 stop4h 50m
Aer Lingus
Fri 19/614:30
CFN
-
LHR
1 stop4h 55m
Aer Lingus
Deal found 13/5£308
Sat 30/515:50
LHR
-
CFN
1 stop22h 10m
Aer Lingus
Sat 6/614:30
CFN
-
LHR
1 stop4h 55m
Aer Lingus
Deal found 14/5£314
Fri 12/617:35
LHR
-
CFN
2 stops20h 25m
Multiple Airlines
Fri 19/614:30
CFN
-
LHR
1 stop4h 55m
Multiple Airlines
Deal found 13/5£361
Thu 19/1106:30
LHR
-
CFN
1 stop13h 30m
British Airways
Sat 21/1114:30
CFN
-
LHR
1 stop7h 30m
British Airways
Deal found 13/5£389
Wed 10/620:20
LHR
-
CFN
2 stops37h 50m
Multiple Airlines
Sun 14/614:30
CFN
-
LHR
1 stop6h 25m
Multiple Airlines
Deal found 12/5£425
Wed 12/820:20
LHR
-
CFN
2 stops37h 50m
Multiple Airlines
Mon 31/807:55
CFN
-
LHR
1 stop5h 35m
Multiple Airlines
Deal found 13/5£429

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 17 May 2026.

Round-trip from

£217

One-way from

£123
Aer Lingus
  • Aer Lingus
  • 6/6-8/6
  • 2 total stops
  • 9h 05m total
  • London to Donegal
Search Deals
Aer Lingus
  • Aer Lingus
  • 25/5
  • 1 total stop
  • 22h 50m 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 17 May 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
Fastest return journey

LondonDonegal

LHR - CFN

LHRCFN

London Heathrow

Sat 6/6

15:50-20:00

1 stop4h 10m

Donegal

Mon 8/6

14:30-19:25

1 stop4h 55m

£217

LondonDonegal

LHR - CFN

LHRCFN

London Heathrow

Wed 10/6

15:10-20:00

1 stop4h 50m

Donegal

Sun 14/6

14:30-20:55

1 stop6h 25m

£237

LondonDonegal

LHR - CFN

LHRCFN

London Heathrow

Mon 1/6

07:40-14:00

1 stop6h 20m

Donegal

Tue 9/6

07:55-17:20

1 stop9h 25m

£251

LondonDonegal

LHR - CFN

LHRCFN

London Heathrow

Fri 12/6

15:10-20:00

1 stop4h 50m

Donegal

Fri 19/6

14:30-19:25

1 stop4h 55m

£308

LondonDonegal

LHR - CFN

LHRCFN

London Heathrow

Fri 12/6

17:35-14:00

2 stops20h 25m

Donegal

Fri 19/6

14:30-19:25

1 stop4h 55m

£361

LondonDonegal

LHR - CFN

LHRCFN

London Heathrow

Wed 10/6

20:20-10:10

2 stops37h 50m

Donegal

Sun 14/6

14:30-20:55

1 stop6h 25m

£425

LondonDonegal

LHR - CFN

LHRCFN

London Heathrow

Wed 12/8

20:20-10:10

2 stops37h 50m

Donegal

Mon 31/8

07:55-13:30

1 stop5h 35m

£429

LondonDonegal

LHR - CFN

LHRCFN

London Heathrow

Mon 8/6

14:50-14:00

1 stop23h 10m

Donegal

Wed 10/6

14:30-21:45

1 stop7h 15m

£455

LondonDonegal

LHR - CFN

LHRCFN

London Heathrow

Sat 6/6

21:10-18:45

2 stops21h 35m

Donegal

Mon 8/6

14:30-21:45

1 stop7h 15m

£530

LondonDonegal

LHR - CFN

LHRCFN

London Heathrow

Wed 10/6

20:20-10:10

2 stops37h 50m

Donegal

Sun 14/6

19:15-15:30

2 stops20h 15m

£672

Flights are sorted by cheapest return flights first.

Deals found on 12/5

Showing 1-10 of 15 resultsSorted by cheapest first
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.

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 4h 10m. 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?

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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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