Find flights
When to book
FAQs

Cheap flights from London Heathrow Airport to Donegal from £121

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 28/6. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — CFN
21 Apr — 28 Apr1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Heathrow to Donegal

Enter your travel dates to find the best prices.

Cheapest flights from Heathrow to Donegal
Explore the most affordable flight options available from Heathrow to Donegal. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 22 March 2026.

Tue 5/506:20
LHR
-
CFN
1 stop13h 40m
Multiple Airlines
Tue 12/508:00
CFN
-
LHR
1 stop13h 40m
Multiple Airlines
Deal found 21/3£170
Sat 18/408:15
LHR
-
CFN
1 stop11h 45m
Multiple Airlines
Thu 23/408:00
CFN
-
LHR
1 stop7h 15m
Multiple Airlines
Deal found 20/3£197
Wed 6/509:55
LHR
-
CFN
2 stops21h 40m
Multiple Airlines
Wed 13/508:00
CFN
-
LHR
1 stop7h 00m
Multiple Airlines
Deal found 21/3£204
Wed 6/521:10
LHR
-
CFN
1 stop10h 25m
Aer Lingus
Wed 13/508:00
CFN
-
LHR
1 stop7h 00m
Aer Lingus
Deal found 22/3£205
Sun 19/408:50
LHR
-
CFN
1 stop11h 10m
Aer Lingus
Wed 22/408:00
CFN
-
LHR
1 stop5h 55m
Aer Lingus
Deal found 20/3£229
Mon 4/509:50
LHR
-
CFN
1 stop10h 10m
Aer Lingus
Mon 11/508:00
CFN
-
LHR
1 stop4h 40m
Aer Lingus
Deal found 20/3£233
Sat 18/415:10
LHR
-
CFN
1 stop4h 50m
Aer Lingus
Wed 22/408:00
CFN
-
LHR
1 stop4h 40m
Aer Lingus
Deal found 20/3£235
Sun 3/521:10
LHR
-
CFN
1 stop10h 25m
Aer Lingus
Sun 10/508:00
CFN
-
LHR
1 stop12h 20m
Aer Lingus
Deal found 19/3£243
Tue 14/415:10
LHR
-
CFN
1 stop4h 50m
Aer Lingus
Tue 21/408:00
CFN
-
LHR
1 stop4h 40m
Aer Lingus
Deal found 17/3£257
Sat 18/421:10
LHR
-
CFN
1 stop10h 25m
Aer Lingus
Fri 24/408:00
CFN
-
LHR
1 stop9h 20m
Aer Lingus
Deal found 20/3£259

Find flight deals from Heathrow to Donegal

Discover tips and strategies to find the most affordable flight options for your journey from Heathrow (LHR) to Donegal (CFN). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 22 March 2026.

Round-trip from

£170

One-way from

£121
5/5-12/5
  • 5/5-12/5
  • 2 total stops
  • 27h 20m total
  • London to Donegal
Search Deals
28/6
  • 28/6
  • 1 total stop
  • 13h 40m total
  • London to Donegal
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Heathrow 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, Cheapflights users made 858,174 searches. Data last updated 22 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

Tue 5/5

06:20-20:00

1 stop13h 40m

Donegal

Tue 12/5

08:00-21:40

1 stop13h 40m

£170

LondonDonegal

LHR - CFN

LHRCFN

London Heathrow

Sat 18/4

08:15-20:00

1 stop11h 45m

Donegal

Thu 23/4

08:00-15:15

1 stop7h 15m

£197

LondonDonegal

LHR - CFN

LHRCFN

London Heathrow

Wed 6/5

09:55-07:35

2 stops21h 40m

Donegal

Wed 13/5

08:00-15:00

1 stop7h 00m

£204
Fastest return journey

LondonDonegal

LHR - CFN

LHRCFN

London Heathrow

Wed 6/5

15:10-20:00

1 stop4h 50m

Donegal

Wed 13/5

08:00-15:00

1 stop7h 00m

£206

LondonDonegal

LHR - CFN

LHRCFN

London Heathrow

Mon 4/5

09:50-20:00

1 stop10h 10m

Donegal

Mon 11/5

08:00-12:40

1 stop4h 40m

£233

LondonDonegal

LHR - CFN

LHRCFN

London Heathrow

Sat 18/4

21:10-07:35

1 stop10h 25m

Donegal

Fri 24/4

08:00-17:20

1 stop9h 20m

£259

LondonDonegal

LHR - CFN

LHRCFN

London Heathrow

Sun 19/4

08:50-20:00

1 stop11h 10m

Donegal

Thu 23/4

08:00-16:00

1 stop8h 00m

£262

LondonDonegal

LHR - CFN

LHRCFN

London Heathrow

Tue 14/4

06:00-20:00

2 stops14h 00m

Donegal

Tue 21/4

08:00-19:20

2 stops11h 20m

£465

LondonDonegal

LHR - CFN

LHRCFN

London Heathrow

Sun 3/5

22:40-20:00

2 stops21h 20m

Donegal

Sun 10/5

08:00-12:40

1 stop4h 40m

£523
Cheapest one-way
Fastest single journey

LondonDonegal

LHR - CFN

LHRCFN

London Heathrow

Sun 28/6

08:05-20:00

2 stops11h 55m

£189

Flights are sorted by cheapest return flights first.

Deals found on 21/3

Sorted by cheapest first

Best time to book a flight from Heathrow to Donegal

Have a flexible travel schedule? Discover the best time to fly to Donegal from Heathrow with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from London Heathrow Airport to Donegal

What is the cheapest month to book a flight from London Heathrow Airport to Donegal?

Currently, May is the cheapest month in which you can book a flight from London Heathrow Airport to Donegal (average of £74). Flying from London Heathrow Airport to Donegal in August is currently the most expensive (average of £116). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Related info for your journey

Find useful and relevant information for your journey from Heathrow to Donegal. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Donegal from London Heathrow?

    Donegal (CFN) is the airport you will fly into if you book a flight from London Heathrow to Donegal. You should not have trouble finding flights to Donegal from London Heathrow; the airport handles an average of 0 inbound flights from London Heathrow per day. You should also have plenty of airline options to choose from since 0 airlines have flights to the Donegal airport from London Heathrow. It is only a 28.5 mi journey from Donegal (CFN) to Donegal’s city center.

  • How long is the flight from London Heathrow Airport to Donegal?

    Airlines like Aer Lingus fly from London Heathrow Airport to Donegal in about 4h 50m. The time it takes to get you to your destination can typically vary by up to . Airlines will cover a distance of 408 mi.

  • Can I find deals for flights from Heathrow to Donegal that include hotel bookings?

    Yes. In addition to deals on Heathrow to Donegal flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Heathrow to Donegal?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Heathrow to Donegal.

  • Can I find deals for business class flights from Heathrow to Donegal?

    Yes. Cheapflights offers flight deals from Heathrow to Donegal by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from London Heathrow Airport to Donegal?

    Currently, May is the cheapest month in which you can book a flight from London Heathrow Airport to Donegal (average of £74). Flying from London Heathrow Airport to Donegal in August is currently the most expensive (average of £116). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Travelling to a place near Donegal?

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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Heathrow to Donegal?

Cheapflights helps you search for flights from Heathrow to Donegal via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

Why should you use Cheapflights to find cheap flight tickets from Heathrow to Donegal?

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Donegal from Heathrow.

Can Cheapflights find flights from Heathrow to Donegal with no change fees?

Users can book flights with no change fees policies with our dedicated filters. Book flights from Heathrow to Donegal flexibly with Cheapflights today.

Can Cheapflights notify me if prices for flights from Heathrow to Donegal become cheaper?

Not ready to book yet? You can track prices for flights from Heathrow to Donegal on Cheapflights with our Price Alert feature and get notified when better prices are available.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.