Find flights
When to book
Airlines
FAQs

Cheap flights from London Heathrow Airport to Donegal from £284

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/12. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — CFN
7 Dec — 14 Dec1
1 adult
1 adult, Economy, 0 bags

Cheap 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 7 November 2025.

Round-trip from

£284
Aer Lingus
  • Aer Lingus
  • 5/12-12/12
  • 2 total stops
  • 15h 05m total
  • London to Donegal
Search Deals

Find 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 7 November 2025.

Fri 5/1207:50LHR - CFN
1 stop6h 10mAer Lingus
Fri 12/1207:55CFN - LHR
1 stop8h 55mAer Lingus
Deal found 6/11£284
Sun 21/1206:55LHR - CFN
1 stop11h 50mMultiple Airlines
Sun 28/1219:15CFN - LHR
1 stop12h 55mMultiple Airlines
Deal found 6/11£329
Fri 5/1207:50LHR - CFN
1 stop6h 10mMultiple Airlines
Fri 12/1214:00CFN - LHR
2 stops7h 05mMultiple Airlines
Deal found 6/11£500
Mon 22/1206:30LHR - CFN
1 stop7h 30mBritish Airways
Mon 29/1214:30CFN - LHR
1 stop6h 35mBritish Airways
Deal found 6/11£523

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 7 November 2025.
Use the filters below to find and compare flights from London Heathrow Airport to Donegal that are best for you.

Fly from

Heathrow

Fly to

Donegal

Route

Depart

Return

Price

LondonDonegal

LHR - CFN

LHRCFN

London Heathrow

Fri 5/12

07:50-14:00

1 stop6h 10m

Donegal

Fri 12/12

07:55-16:50

1 stop8h 55m

£284

LondonDonegal

LHR - CFN

LHRCFN

London Heathrow

Sun 21/12

06:55-18:45

1 stop11h 50m

Donegal

Sun 28/12

19:15-08:10

1 stop12h 55m

£329

LondonDonegal

LHR - CFN

LHRCFN

London Heathrow

Fri 5/12

07:50-14:00

1 stop6h 10m

Donegal

Fri 12/12

14:00-21:05

2 stops7h 05m

£500

LondonDonegal

LHR - CFN

LHRCFN

London Heathrow

Mon 22/12

06:30-14:00

1 stop7h 30m

Donegal

Mon 29/12

14:30-21:05

1 stop6h 35m

£523

Flights are sorted by cheapest return flights first.

Deals found on 6/11

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, February is the cheapest month in which you can book a flight from London Heathrow Airport to Donegal (average of £73). Flying from London Heathrow Airport to Donegal in August is currently the most expensive (average of £122). 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.

What is the cheapest time of day to fly from LHR to CFN?

Find hourly flight availability from Heathrow to Donegal. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 7 November 2025.

It’s typically best to fly out from London Heathrow Airport to Donegal in the evening. Doing so could potentially save you 21% on the flight price compared to flying in the afternoon, which is usually more expensive.

Reviews of airlines servicing Donegal

Get insights into the airlines that provide service to Donegal. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Donegal. Reviews last updated 7 November 2025.
Read through reviews of airlines operating flights from London Heathrow Airport to Donegal, such as Aer Lingus. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Aer Lingus
7.2
Good
1,365 reviews
Check prices

Crew

8.0

Food

6.6

Comfort

7.1

Boarding

7.4

Entertainment

6.9

Overall

7.2

Reviews

1 / 20
6.0
Good

David,Oct 2025

LIS - DUB

Two issues... 1. The Aer Lingus check-in counter in Lisbon did not open until 90 minutes prior to the flight. Huge line of customers waiting to check-in and very time consuming. Plus, having to clear security, passport control, and take the shuttle bus to the plane takes a long time. Consequently, the flight was delayed due to passengers not being able to get to the gate on time. I showed up four hours early but had to wait for over two hours just for the check-in counter to open. Many passengers complaining about the same issue. VERY STRESSFUL! 2. During the flight one of the flight attendants (Glen) was quite rude to a parent of a non-verbal autistic child. At one point I heard him say in a nasty tone, "You have three seconds to put your bag under the seat or I will take it and check it. 3, 2, 1!" I did not speak to the flight attendant because I was afraid he would kick me off the flight. Very unpleasant to everyone before take off also while instructing them to put the seats up and bags under. A little interpersonal communication training could help this man. Other than those two issues, the flight was fine.
Aer Lingus
7.2
Good
1,365 reviews
Aer Lingus
7.2
Good
1,365 reviews
Check prices

Crew

8.0

Food

6.6

Comfort

7.1

Boarding

7.4

Entertainment

6.9

Overall

7.2

Reviews

1 / 20
6.0
Good

David,Oct 2025

LIS - DUB

Two issues... 1. The Aer Lingus check-in counter in Lisbon did not open until 90 minutes prior to the flight. Huge line of customers waiting to check-in and very time consuming. Plus, having to clear security, passport control, and take the shuttle bus to the plane takes a long time. Consequently, the flight was delayed due to passengers not being able to get to the gate on time. I showed up four hours early but had to wait for over two hours just for the check-in counter to open. Many passengers complaining about the same issue. VERY STRESSFUL! 2. During the flight one of the flight attendants (Glen) was quite rude to a parent of a non-verbal autistic child. At one point I heard him say in a nasty tone, "You have three seconds to put your bag under the seat or I will take it and check it. 3, 2, 1!" I did not speak to the flight attendant because I was afraid he would kick me off the flight. Very unpleasant to everyone before take off also while instructing them to put the seats up and bags under. A little interpersonal communication training could help this man. Other than those two issues, the flight was fine.

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 1 airline has 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 6h 10m. The time it takes to get you to your destination can typically vary by up to . Airlines will cover a distance of 408 mi.

  • What is the cheapest airline to fly from London Heathrow Airport to Donegal round-trip?

    According to our current data, Aer Lingus (£176), offers the cheapest pricing from London Heathrow Airport to Donegal.

  • 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, February is the cheapest month in which you can book a flight from London Heathrow Airport to Donegal (average of £73). Flying from London Heathrow Airport to Donegal in August is currently the most expensive (average of £122). 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
Bundoran
Letterkenny
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.

Alternative routes for Heathrow to Donegal

See prices for flight routes from nearby airports that may be better suited for you.
Heathrow to Dublin flights
Gatwick to Dublin flights
London City to Dublin flights
Stansted to Dublin flights
Luton to Dublin flights
Southend to Dublin flights
Heathrow to Cork flights
Heathrow to Shannon flights
London City to Cork flights
Gatwick to Cork flights
Stansted to Cork flights
Gatwick to Shannon flights
Luton to Shannon flights
Stansted to Shannon flights
Luton to Knock flights
Heathrow to Knock flights
Luton to Cork flights
Stansted to Knock flights
Gatwick to Knock flights
Luton to Milltown (Kerry) flights
London City to Shannon flights
Heathrow to Milltown (Kerry) flights
Gatwick to Milltown (Kerry) flights
Stansted to Milltown (Kerry) flights
Southend to Cork flights
Southend to Knock flights
Southend to Shannon flights
London City to Knock flights
London City to Milltown (Kerry) flights
London City to Donegal flights
Luton to Donegal flights
Gatwick to Donegal flights
Stansted to Donegal flights
Southend to Milltown (Kerry) flights
Southend to Donegal flights

Top airline flying from Heathrow to Donegal

Discover the top airline that operate flights from Heathrow to Donegal. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 7 November 2025.
AirlineCheapestAverageFlexibilityOn-time
Aer LingusCheapest£176Average£295FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights

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.