Latest deals
Insights
When to book
FAQs
Price Alerts

Cheap flights from London Heathrow Airport to Donegal from €138

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 15/5. 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
Voted the Winner of Europe's Best Travel App 2023

Save money when you book flights with momondo

Big names, great deals

Big names, great deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customise your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Find the cheapest flights from London Heathrow Airport to Donegal

Cheap return flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
06:15 - 20:00
LHR
-
CFN
13h 45m
1 stop
Multiple Airlines Logo
08:00 - 21:30
CFN
-
LHR
13h 30m
1 stop
€202Multiple Airlines
Sat, 9 May - Sat, 16 May
Aer Lingus Logo
15:50 - 20:00
LHR
-
CFN
4h 10m
1 stop
Aer Lingus Logo
08:00 - 18:20
CFN
-
LHR
10h 20m
1 stop
€224Aer Lingus
Sat, 9 May - Sat, 16 May
Aer Lingus Logo
15:50 - 20:00
LHR
-
CFN
4h 10m
1 stop
Aer Lingus Logo
08:00 - 18:55
CFN
-
LHR
10h 55m
1 stop
€235Aer Lingus
Wed, 13 May - Wed, 20 May
Aer Lingus Logo
18:10 - 07:35
LHR
-
CFN
13h 25m
1 stop
Aer Lingus Logo
08:00 - 17:20
CFN
-
LHR
9h 20m
1 stop
€244Aer Lingus
Tue, 12 May - Tue, 19 May
Multiple Airlines Logo
06:20 - 07:35
LHR
-
CFN
25h 15m
1 stop
Multiple Airlines Logo
08:00 - 21:45
CFN
-
LHR
13h 45m
1 stop
€250Multiple Airlines
Sun, 10 May - Sun, 17 May
Aer Lingus Logo
21:10 - 07:35
LHR
-
CFN
10h 25m
1 stop
Aer Lingus Logo
08:00 - 13:55
CFN
-
LHR
5h 55m
1 stop
€258Aer Lingus
Fri, 17 Apr - Sun, 19 Apr
Multiple Airlines Logo
20:50 - 20:00
LHR
-
CFN
23h 10m
2 stops
Multiple Airlines Logo
08:00 - 12:40
CFN
-
LHR
4h 40m
1 stop
€270Multiple Airlines
Wed, 13 May - Wed, 20 May
Multiple Airlines Logo
08:40 - 07:35
LHR
-
CFN
22h 55m
3 stops
Multiple Airlines Logo
08:00 - 17:20
CFN
-
LHR
9h 20m
1 stop
€353Multiple Airlines
Sat, 9 May - Sat, 16 May
Aer Lingus Logo
12:00 - 20:00
LHR
-
CFN
8h 00m
1 stop
Aer Lingus Logo
08:00 - 19:25
CFN
-
LHR
11h 25m
1 stop
€355Aer Lingus
Fri, 21 Aug - Sun, 23 Aug
Multiple Airlines Logo
06:30 - 07:35
LHR
-
CFN
25h 05m
2 stops
Multiple Airlines Logo
08:00 - 17:20
CFN
-
LHR
9h 20m
1 stop
€367Multiple Airlines
Sat, 9 May - Sat, 16 May

Aer Lingus flights from London Heathrow Airport to Donegal

Our best Aer Lingus deals on London Heathrow Airport to Donegal flight tickets
Aer Lingus
9 May
LHR15:50London Heathrow
4h 10m
1 stop
CFN20:00Donegal
16 May
CFN08:00Donegal
10h 20m
1 stop
LHR18:20London Heathrow
€224
Aer Lingus
13 May
LHR15:50London Heathrow
4h 10m
1 stop
CFN20:00Donegal
20 May
CFN08:00Donegal
10h 55m
1 stop
LHR18:55London Heathrow
€235
Aer Lingus
12 May
LHR18:10London Heathrow
13h 25m
1 stop
CFN07:35Donegal
19 May
CFN08:00Donegal
9h 20m
1 stop
LHR17:20London Heathrow
€244

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 30 March 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 9/5

06:15-20:00

1 stop13h 45m

Donegal

Sat 16/5

08:00-21:30

1 stop13h 30m

€202
Fastest return journey

LondonDonegal

LHR - CFN

LHRCFN

London Heathrow

Sat 9/5

15:50-20:00

1 stop4h 10m

Donegal

Sat 16/5

08:00-18:20

1 stop10h 20m

€224

LondonDonegal

LHR - CFN

LHRCFN

London Heathrow

Wed 13/5

15:50-20:00

1 stop4h 10m

Donegal

Wed 20/5

08:00-18:55

1 stop10h 55m

€235

LondonDonegal

LHR - CFN

LHRCFN

London Heathrow

Tue 12/5

18:10-07:35

1 stop13h 25m

Donegal

Tue 19/5

08:00-17:20

1 stop9h 20m

€244

LondonDonegal

LHR - CFN

LHRCFN

London Heathrow

Sun 10/5

06:20-07:35

1 stop25h 15m

Donegal

Sun 17/5

08:00-21:45

1 stop13h 45m

€250

LondonDonegal

LHR - CFN

LHRCFN

London Heathrow

Fri 17/4

21:10-07:35

1 stop10h 25m

Donegal

Sun 19/4

08:00-13:55

1 stop5h 55m

€258

LondonDonegal

LHR - CFN

LHRCFN

London Heathrow

Wed 13/5

20:50-20:00

2 stops23h 10m

Donegal

Wed 20/5

08:00-12:40

1 stop4h 40m

€270

LondonDonegal

LHR - CFN

LHRCFN

London Heathrow

Sat 9/5

08:40-07:35

3 stops22h 55m

Donegal

Sat 16/5

08:00-17:20

1 stop9h 20m

€353

LondonDonegal

LHR - CFN

LHRCFN

London Heathrow

Fri 21/8

12:00-20:00

1 stop8h 00m

Donegal

Sun 23/8

08:00-19:25

1 stop11h 25m

€355

LondonDonegal

LHR - CFN

LHRCFN

London Heathrow

Sat 9/5

06:30-07:35

2 stops25h 05m

Donegal

Sat 16/5

08:00-17:20

1 stop9h 20m

€367

Flights are sorted by cheapest return flights first.

Showing 1-10 of 11 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 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.
Search flight deals

  • 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

We make it super easy to schedule, organise and travel with friends or family. Trips is free – and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Wed 29/4
Wed 6/5
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Ireland