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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 momondo user in the last 72 hours by searching for a flight from London Heathrow Airport to Donegal departing on 16/8. 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
0 bags

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Find the cheapest flights from London Heathrow Airport to Donegal

Cheap return flights

Logo
16:10 - 20:00LHR-CFN
3h 50m1 stop
Logo
07:55 - 12:00CFN-LHR
4h 05m1 stop
£169
Find Deal
Thu, 11 Sep - Mon, 15 Sep
Logo
06:20 - 14:00LHR-CFN
7h 40m1 stop
Logo
07:55 - 12:30CFN-LHR
4h 35m1 stop
£178
Find Deal
Thu, 11 Sep - Wed, 17 Sep
Logo
06:20 - 14:00LHR-CFN
7h 40m1 stop
Logo
07:55 - 12:35CFN-LHR
4h 40m1 stop
£198
Find Deal
Fri, 10 Oct - Mon, 13 Oct
Aer Lingus Logo
07:40 - 14:00LHR-CFN
6h 20m1 stop
Aer Lingus Logo
14:30 - 20:20CFN-LHR
5h 50m1 stop
£211Aer Lingus
Find Deal
Thu, 4 Sep - Sat, 6 Sep
Logo
10:30 - 20:00LHR-CFN
9h 30m1 stop
Logo
14:30 - 21:35CFN-LHR
7h 05m1 stop
£212
Find Deal
Mon, 1 Sep - Fri, 5 Sep
Aer Lingus Logo
08:50 - 20:00LHR-CFN
11h 10m1 stop
Aer Lingus Logo
13:20 - 20:55CFN-LHR
7h 35m1 stop
£215Aer Lingus
Find Deal
Sun, 14 Sep - Sun, 21 Sep
Logo
06:40 - 20:00LHR-CFN
13h 20m2 stops
Logo
07:55 - 19:55CFN-LHR
12h 00m2 stops
£238
Find Deal
Mon, 1 Sep - Fri, 5 Sep
Aer Lingus Logo
15:50 - 20:00LHR-CFN
4h 10m1 stop
Aer Lingus Logo
14:30 - 18:55CFN-LHR
4h 25m1 stop
£254Aer Lingus
Find Deal
Mon, 22 Sep - Fri, 26 Sep
Logo
06:40 - 20:00LHR-CFN
13h 20m2 stops
Logo
07:55 - 19:55CFN-LHR
12h 00m2 stops
£329
Find Deal
Mon, 22 Sep - Fri, 26 Sep
Logo
06:40 - 20:00LHR-CFN
13h 20m2 stops
Logo
07:55 - 18:50CFN-LHR
10h 55m2 stops
£345
Find Deal
Thu, 11 Sep - Mon, 15 Sep

Aer Lingus flights from London Heathrow Airport to Donegal

Our best Aer Lingus deals on London Heathrow Airport to Donegal flight tickets
Aer Lingus
4 Sept
LHR07:40London Heathrow
6h 20m
1 stop
CFN14:00Donegal
6 Sept
CFN14:30Donegal
5h 50m
1 stop
LHR20:20London Heathrow
£211
Find similar
Aer Lingus
14 Sept
LHR08:50London Heathrow
11h 10m
1 stop
CFN20:00Donegal
21 Sept
CFN13:20Donegal
7h 35m
1 stop
LHR20:55London Heathrow
£215
Find similar
Aer Lingus
22 Sept
LHR15:50London Heathrow
4h 10m
1 stop
CFN20:00Donegal
26 Sept
CFN14:30Donegal
4h 25m
1 stop
LHR18:55London Heathrow
£254
Find similar

British Airways flights from London Heathrow Airport to Donegal

Our best British Airways deals on London Heathrow Airport to Donegal flight tickets
British Airways
6 Aug
LHR16:30London Heathrow
21h 30m
1 stop
CFN14:00Donegal
10 Aug
CFN13:20Donegal
21h 00m
1 stop
LHR10:20London Heathrow
£509
Find similar
British Airways
7 Aug
LHR06:20London Heathrow
13h 40m
1 stop
CFN20:00Donegal
10 Aug
CFN13:20Donegal
21h 00m
1 stop
LHR10:20London Heathrow
£529
Find similar

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 279,928 searches. Data last updated 1 August 2025.
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

LondonDonegal

LHR - CFN

LHRCFN

London Heathrow

Thu 11/9

16:10-20:00

1 stop3h 50m

Donegal

Mon 15/9

07:55-12:00

1 stop4h 05m

£169

LondonDonegal

LHR - CFN

LHRCFN

London Heathrow

Thu 11/9

06:20-14:00

1 stop7h 40m

Donegal

Wed 17/9

07:55-12:30

1 stop4h 35m

£178

LondonDonegal

LHR - CFN

LHRCFN

London Heathrow

Fri 10/10

06:20-14:00

1 stop7h 40m

Donegal

Mon 13/10

07:55-12:35

1 stop4h 40m

£198

LondonDonegal

LHR - CFN

LHRCFN

London Heathrow

Thu 4/9

07:40-14:00

1 stop6h 20m

Donegal

Sat 6/9

14:30-20:20

1 stop5h 50m

£211

LondonDonegal

LHR - CFN

LHRCFN

London Heathrow

Mon 1/9

10:30-20:00

1 stop9h 30m

Donegal

Fri 5/9

14:30-21:35

1 stop7h 05m

£212

LondonDonegal

LHR - CFN

LHRCFN

London Heathrow

Sun 14/9

08:50-20:00

1 stop11h 10m

Donegal

Sun 21/9

13:20-20:55

1 stop7h 35m

£215

LondonDonegal

LHR - CFN

LHRCFN

London Heathrow

Mon 1/9

06:40-20:00

2 stops13h 20m

Donegal

Fri 5/9

07:55-19:55

2 stops12h 00m

£238

LondonDonegal

LHR - CFN

LHRCFN

London Heathrow

Mon 22/9

15:50-20:00

1 stop4h 10m

Donegal

Fri 26/9

14:30-18:55

1 stop4h 25m

£254

LondonDonegal

LHR - CFN

LHRCFN

London Heathrow

Mon 22/9

06:40-20:00

2 stops13h 20m

Donegal

Fri 26/9

07:55-19:55

2 stops12h 00m

£329

LondonDonegal

LHR - CFN

LHRCFN

London Heathrow

Thu 11/9

06:40-20:00

2 stops13h 20m

Donegal

Mon 15/9

07:55-18:50

2 stops10h 55m

£345

Flights are sorted by cheapest return flights first.

Showing 1-10 of 13 resultsSorted by cheapest first
1
2

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 day to depart on your flight to Donegal?

The cheapest day to depart on your flight to Donegal is on a Wednesday when prices can be found for as low as £207. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Saturday because tickets tend to average around £307. These prices are subject to change though, so be sure to set up a Price Alert for flights to Donegal.

What is the cheapest time of day to depart on your flight to Donegal?

Flying to Donegal from London Heathrow Airport in the morning is the least expensive time of day to depart. momondo users have found prices as low as £278 when looking at flights departing in the morning. In contrast, the most expensive time of day to depart to Donegal is in the afternoon when prices are around £304.

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

Best price found

£125

Fastest flight time

3h 50m

Direct flights

None

Airports in Donegal

1 airport
The best one-way flight to Donegal from London Heathrow Airport in the past 72 hours is £125. The best return flight deal from London Heathrow Airport to Donegal found on momondo in the last 72 hours is £169.
The fastest flight from London Heathrow Airport to Donegal takes 3h 50m
There are no direct flights from London Heathrow Airport to Donegal. Popular non-direct route for this connection is London Heathrow Airport - Donegal Airport.
There is 1 airport near Donegal: Donegal (CFN)
Search flight deals

  • How far is London Heathrow to Donegal by plane?

    London Heathrow and Donegal are 385.9 mi apart from one another. In terms of flight time, this usually takes a little over 3h 50m.

  • 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 many operators does momondo search for flights from London Heathrow Airport to Donegal Airport?

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

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify 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 license 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.

  • What is the most popular airline from London Heathrow Airport to Donegal?

Best airlines flying from London Heathrow Airport to Donegal

Compare and see reviews for airlines that fly from London Heathrow Airport to Donegal with momondo
Airline
Rating
Free Cancellation
Price
Aer LingusPriceFrom £174Free CancellationRating
7.1
1,192 reviews
Search Aer Lingus flights

Travelling to a place near Donegal?

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

Why use momondo?

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

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from London to Donegal. momondo saves you time and could save you money on your trip.

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

All flight searches from London to Donegal on momondo can be filtered to show those which offer flexible booking policies.

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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