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Cheap flights from London Heathrow Airport to Donegal from €127

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from London Heathrow Airport to Donegal departing on 27/8. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags
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Find the cheapest flights from London Heathrow Airport to Donegal

Cheap return flights

Enter your travel dates to find the best prices.
Aer Lingus Logo
07:40 - 14:00
LHR
-
CFN
6h 20m
1 stop
Aer Lingus Logo
07:55 - 17:20
CFN
-
LHR
9h 25m
1 stop
€230Aer Lingus
Sat, 29 Aug - Sat, 5 Sep
Aer Lingus Logo
15:50 - 20:00
LHR
-
CFN
4h 10m
1 stop
Aer Lingus Logo
14:30 - 19:25
CFN
-
LHR
4h 55m
1 stop
€237Aer Lingus
Thu, 6 Aug - Mon, 10 Aug
Aer Lingus Logo
08:50 - 14:00
LHR
-
CFN
5h 10m
1 stop
Aer Lingus Logo
07:55 - 20:20
CFN
-
LHR
12h 25m
1 stop
€238Aer Lingus
Mon, 24 Aug - Thu, 27 Aug
Aer Lingus Logo
07:40 - 20:00
LHR
-
CFN
12h 20m
1 stop
Aer Lingus Logo
14:30 - 20:20
CFN
-
LHR
5h 50m
1 stop
€239Aer Lingus
Thu, 6 Aug - Sat, 8 Aug
Aer Lingus Logo
07:40 - 14:00
LHR
-
CFN
6h 20m
1 stop
Aer Lingus Logo
07:55 - 19:25
CFN
-
LHR
11h 30m
1 stop
€244Aer Lingus
Fri, 7 Aug - Fri, 14 Aug
Aer Lingus Logo
15:50 - 20:00
LHR
-
CFN
4h 10m
1 stop
Aer Lingus Logo
14:30 - 18:55
CFN
-
LHR
4h 25m
1 stop
€247Aer Lingus
Mon, 10 Aug - Fri, 14 Aug
Aer Lingus Logo
21:10 - 14:00
LHR
-
CFN
16h 50m
1 stop
Aer Lingus Logo
07:55 - 12:40
CFN
-
LHR
4h 45m
1 stop
€249Aer Lingus
Mon, 10 Aug - Mon, 17 Aug
Aer Lingus Logo
15:50 - 20:00
LHR
-
CFN
4h 10m
1 stop
Aer Lingus Logo
07:55 - 20:20
CFN
-
LHR
12h 25m
1 stop
€250Aer Lingus
Tue, 28 Jul - Wed, 29 Jul
Aer Lingus Logo
15:50 - 20:00
LHR
-
CFN
4h 10m
1 stop
Aer Lingus Logo
14:30 - 20:20
CFN
-
LHR
5h 50m
1 stop
€270Aer Lingus
Mon, 17 Aug - Sun, 23 Aug
Aer Lingus Logo
15:10 - 20:00
LHR
-
CFN
4h 50m
1 stop
Aer Lingus Logo
07:55 - 20:20
CFN
-
LHR
12h 25m
1 stop
€285Aer Lingus
Fri, 31 Jul - Mon, 3 Aug

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Aer Lingus flights from London Heathrow Airport to Donegal

Our best Aer Lingus deals on London Heathrow Airport to Donegal flight tickets
Aer Lingus
29 Aug
LHR07:40London Heathrow
6h 20m
1 stop
CFN14:00Donegal
5 Sept
CFN07:55Donegal
9h 25m
1 stop
LHR17:20London Heathrow
€230
Aer Lingus
6 Aug
LHR15:50London Heathrow
4h 10m
1 stop
CFN20:00Donegal
10 Aug
CFN14:30Donegal
4h 55m
1 stop
LHR19:25London Heathrow
€237
Aer Lingus
24 Aug
LHR08:50London Heathrow
5h 10m
1 stop
CFN14:00Donegal
27 Aug
CFN07:55Donegal
12h 25m
1 stop
LHR20:20London Heathrow
€238

British Airways flights from London Heathrow Airport to Donegal

Our best British Airways deals on London Heathrow Airport to Donegal flight tickets
British Airways
4 Sept
LHR06:20London Heathrow
7h 40m
1 stop
CFN14:00Donegal
8 Sept
CFN14:30Donegal
7h 10m
1 stop
LHR21:40London Heathrow
€449
British Airways
4 Sept
LHR06:20London Heathrow
7h 40m
1 stop
CFN14:00Donegal
8 Sept
CFN14:30Donegal
7h 10m
1 stop
LHR21:40London Heathrow
€449
British Airways
4 Sept
LHR06:20London Heathrow
7h 40m
1 stop
CFN14:00Donegal
8 Sept
CFN14:30Donegal
7h 10m
1 stop
LHR21:40London Heathrow
€450

momondo Fare Finder

 
Customise your flight search to find flights from London Heathrow Airport 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, momondo users made 13,528 searches. Data last updated 13 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

Sat 29/8

07:40-14:00

1 stop6h 20m

Donegal

Sat 5/9

07:55-17:20

1 stop9h 25m

€230

LondonDonegal

LHR - CFN

LHRCFN

London Heathrow

Thu 6/8

15:50-20:00

1 stop4h 10m

Donegal

Mon 10/8

14:30-19:25

1 stop4h 55m

€237

LondonDonegal

LHR - CFN

LHRCFN

London Heathrow

Mon 24/8

08:50-14:00

1 stop5h 10m

Donegal

Thu 27/8

07:55-20:20

1 stop12h 25m

€238

LondonDonegal

LHR - CFN

LHRCFN

London Heathrow

Thu 6/8

07:40-20:00

1 stop12h 20m

Donegal

Sat 8/8

14:30-20:20

1 stop5h 50m

€239

LondonDonegal

LHR - CFN

LHRCFN

London Heathrow

Fri 7/8

07:40-14:00

1 stop6h 20m

Donegal

Fri 14/8

07:55-19:25

1 stop11h 30m

€244
Fastest return journey

LondonDonegal

LHR - CFN

LHRCFN

London Heathrow

Mon 10/8

15:50-20:00

1 stop4h 10m

Donegal

Fri 14/8

14:30-18:55

1 stop4h 25m

€247

LondonDonegal

LHR - CFN

LHRCFN

London Heathrow

Mon 10/8

21:10-14:00

1 stop16h 50m

Donegal

Mon 17/8

07:55-12:40

1 stop4h 45m

€249

LondonDonegal

LHR - CFN

LHRCFN

London Heathrow

Tue 28/7

15:50-20:00

1 stop4h 10m

Donegal

Wed 29/7

07:55-20:20

1 stop12h 25m

€250

LondonDonegal

LHR - CFN

LHRCFN

London Heathrow

Mon 17/8

15:50-20:00

1 stop4h 10m

Donegal

Sun 23/8

14:30-20:20

1 stop5h 50m

€270

LondonDonegal

LHR - CFN

LHRCFN

London Heathrow

Fri 31/7

15:10-20:00

1 stop4h 50m

Donegal

Mon 3/8

07:55-20:20

1 stop12h 25m

€285

Flights are sorted by cheapest return flights first.

Showing 1-10 of 13 resultsSorted by cheapest first
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See travel insights to Donegal from

How to get the cheapest flight ticket from London Heathrow Airport to Donegal

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest airline that flies from London Heathrow to Donegal?

Aer Lingus is the most popular carrier operating from London Heathrow to Donegal

When to book flights from London Heathrow Airport to Donegal

Are you open to changing your travel dates? Check out the ideal times to fly from London Heathrow Airport to Donegal according to our flight data. Find out which month and days have the cheapest flights.
Estimated return price

Cheap London Heathrow Airport to Donegal (LHR to CFN) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from London Heathrow Airport to Donegal

Fastest flight time

4h 10m

Direct flights

None
The fastest flight from London Heathrow Airport to Donegal takes 4h 10m
There are no direct flights from London Heathrow Airport to Donegal. There are no popular flight routes from London Heathrow Airport to Donegal.
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Frequently asked questions about flying from London Heathrow Airport to Donegal

  • How far is London Heathrow to Donegal by plane?

    Donegal is 621.0 km away from London Heathrow. 4h 10m is a normal flight duration for this route.

  • When did momondo last update prices for flights from London Heathrow Airport to Donegal Airport?

    Prices for flights from London Heathrow Airport to Donegal Airport are updated daily.

  • How old do you have to be to fly from London Heathrow Airport to Donegal Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and stopovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from London Heathrow Airport to Donegal Airport.

  • What documentation or ID do you need to fly to Donegal Airport?

    The necessary travel and health documents for your Donegal Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's licence and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Travelling to a place near Donegal?

Book flights to Donegal if you plan to visit one of these locations
Letterkenny
Bundoran
Killybegs

Why use momondo?

Why should I use momondo to find a flight deal from London to Donegal?

Finding the right flight to Donegal from London is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Donegal quick and easy, saving you time and money.

Can I find flights from London to Donegal with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Donegal from London with this policy.

How can momondo help me find flights from London to Donegal?

momondo helps you find the best flight between London and Donegal by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from London to Donegal right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of London to Donegal flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

An easier way to manage your Donegal trip

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