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Cheap flights from London Heathrow Airport to Donegal from €104

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 9/10. 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

Aer Lingus Logo
15:10 - 20:00LHR-CFN
4h 50m1 stop
Aer Lingus Logo
14:30 - 19:50CFN-LHR
5h 20m1 stop
€235Aer Lingus
Find Deal
Fri, 31 Oct - Fri, 7 Nov
Multiple Airlines Logo
06:30 - 14:00LHR-CFN
7h 30m1 stop
Multiple Airlines Logo
07:55 - 17:30CFN-LHR
9h 35m1 stop
€279Multiple Airlines
Find Deal
Sat, 1 Nov - Sat, 8 Nov
Aer Lingus Logo
15:10 - 20:00LHR-CFN
4h 50m1 stop
Aer Lingus Logo
10:00 - 08:00CFN-LHR
22h 00m1 stop
€365Aer Lingus
Find Deal
Thu, 9 Oct - Sun, 12 Oct
Aer Lingus Logo
07:40 - 20:00LHR-CFN
12h 20m1 stop
Aer Lingus Logo
13:20 - 10:20CFN-LHR
21h 00m1 stop
€366Aer Lingus
Find Deal
Thu, 9 Oct - Sun, 12 Oct
Multiple Airlines Logo
07:50 - 14:00LHR-CFN
6h 10m1 stop
Multiple Airlines Logo
07:55 - 21:25CFN-LHR
13h 30m2 stops
€388Multiple Airlines
Find Deal
Sat, 1 Nov - Sat, 8 Nov
Multiple Airlines Logo
08:50 - 14:00LHR-CFN
5h 10m1 stop
Multiple Airlines Logo
07:55 - 09:10CFN-LHR
25h 15m3 stops
€394Multiple Airlines
Find Deal
Sat, 1 Nov - Sat, 8 Nov
Multiple Airlines Logo
07:50 - 14:00LHR-CFN
6h 10m1 stop
Multiple Airlines Logo
07:55 - 15:20CFN-LHR
31h 25m3 stops
€1,137Multiple Airlines
Find Deal
Sat, 1 Nov - Sat, 8 Nov

Aer Lingus flights from London Heathrow Airport to Donegal

Our best Aer Lingus deals on London Heathrow Airport to Donegal flight tickets
Aer Lingus
31 Oct
LHR15:10London Heathrow
4h 50m
1 stop
CFN20:00Donegal
7 Nov
CFN14:30Donegal
5h 20m
1 stop
LHR19:50London Heathrow
€235
Find similar
Aer Lingus
20 Sept
LHR15:50London Heathrow
4h 10m
1 stop
CFN20:00Donegal
24 Sept
CFN07:55Donegal
6h 00m
1 stop
LHR13:55London Heathrow
€274
Find similar
Aer Lingus
18 Sept
LHR15:10London Heathrow
22h 50m
1 stop
CFN14:00Donegal
21 Sept
CFN10:00Donegal
24h 20m
1 stop
LHR10:20London Heathrow
€335
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 13,528 searches. Data last updated 18 September 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

Fri 31/10

15:10-20:00

1 stop4h 50m

Donegal

Fri 7/11

14:30-19:50

1 stop5h 20m

€235

LondonDonegal

LHR - CFN

LHRCFN

London Heathrow

Sat 1/11

06:30-14:00

1 stop7h 30m

Donegal

Sat 8/11

07:55-17:30

1 stop9h 35m

€279

LondonDonegal

LHR - CFN

LHRCFN

London Heathrow

Thu 9/10

15:10-20:00

1 stop4h 50m

Donegal

Sun 12/10

10:00-08:00

1 stop22h 00m

€365

LondonDonegal

LHR - CFN

LHRCFN

London Heathrow

Thu 9/10

07:40-20:00

1 stop12h 20m

Donegal

Sun 12/10

13:20-10:20

1 stop21h 00m

€366

LondonDonegal

LHR - CFN

LHRCFN

London Heathrow

Sat 1/11

07:50-14:00

1 stop6h 10m

Donegal

Sat 8/11

07:55-21:25

2 stops13h 30m

€388

LondonDonegal

LHR - CFN

LHRCFN

London Heathrow

Sat 1/11

08:50-14:00

1 stop5h 10m

Donegal

Sat 8/11

07:55-09:10

3 stops25h 15m

€394

LondonDonegal

LHR - CFN

LHRCFN

London Heathrow

Sat 1/11

07:50-14:00

1 stop6h 10m

Donegal

Sat 8/11

07:55-15:20

3 stops31h 25m

€1,137

LondonDonegal

LHR - CFN

LHRCFN

London Heathrow

Thu 9/10

07:40-14:00

1 stop6h 20m

€104

LondonDonegal

LHR - CFN

LHRCFN

London Heathrow

Thu 20/11

15:10-20:00

1 stop4h 50m

€121

LondonDonegal

LHR - CFN

LHRCFN

London Heathrow

Wed 19/11

09:50-14:00

1 stop4h 10m

€127

Flights are sorted by cheapest return flights first.

Showing 1-10 of 14 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

Direct flights

None
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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  • How far is London Heathrow to Donegal by plane?

    Donegal is 621.0 km away from London Heathrow. 4h 50m 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

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.

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