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Cheap flights from London Heathrow Airport to Donegal from £90

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
£204Aer 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
£243Multiple 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
£317Aer 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
£318Aer 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
£337Multiple 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
£342Multiple 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
£987Multiple 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
£204
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
£238
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
£291
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 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

£204

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

£243

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

£317

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

£318

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

£337

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

£342

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

£987

LondonDonegal

LHR - CFN

LHRCFN

London Heathrow

Thu 9/10

07:40-14:00

1 stop6h 20m

£90

LondonDonegal

LHR - CFN

LHRCFN

London Heathrow

Thu 20/11

15:10-20:00

1 stop4h 50m

£105

LondonDonegal

LHR - CFN

LHRCFN

London Heathrow

Wed 19/11

09:50-14:00

1 stop4h 10m

£111

Flights are sorted by cheapest return flights first.

Showing 1-10 of 14 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 £201. 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 £298. 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 £270 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 £295.

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?

    London Heathrow and Donegal are 385.9 mi apart from one another. In terms of flight time, this usually takes a little over 4h 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 £169Free CancellationRating
7.2
1,277 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.

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