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Cheap flights from London Heathrow Airport to Shannon from £48

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 10/9. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — SNN
27 Aug — 3 Sep1
1 adult

Cheapflights Tip: The best prices from London Heathrow to Shannon are usually found in January or February, booked 80 days in advance, depart on a Friday or Thursday and return on a Friday

Cheap flight deals from Heathrow to Shannon

Discover tips and strategies to find the most affordable flight options for your journey from Heathrow (LHR) to Shannon (SNN). 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 August 2025.

Round-trip from

£89

One-way from

£48

Popular in

December

Cheapest in

January

Average price

£147

Good round-trip deal

£141 or less

Good one-way deal

£233 or less
Aer Lingus
  • Aer Lingus
  • 6/10-20/10
  • Nonstop
  • 2h 50m total
  • London to Shannon
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Aer Lingus
  • Aer Lingus
  • 10/9
  • Nonstop
  • 1h 30m total
  • London to Shannon
Search Deals
High demand for flights, 8% potential price rise
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Cheapest flight prices on average. 2% potential price decrease (£3 potential savings vs. average return price).
Search Deals
Average for round-trip flights in August 2025
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Price to beat on a round-trip flight from London Heathrow to Shannon.
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Price to beat on a one-way flight from London Heathrow to Shannon.
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Find flight deals from Heathrow to Shannon

Cheapest flights from Heathrow to Shannon
Explore the most affordable flight options available from Heathrow to Shannon. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 22 August 2025.

Mon 6/1019:10LHR - SNN
Nonstop1h 25mAer Lingus
Mon 20/1021:15SNN - LHR
Nonstop1h 25mAer Lingus
Deal found 21/8£89
Wed 8/1019:10LHR - SNN
Nonstop1h 25mAer Lingus
Wed 15/1007:40SNN - LHR
Nonstop1h 25mAer Lingus
Deal found 20/8£92
Tue 16/919:10LHR - SNN
Nonstop1h 25mAer Lingus
Tue 23/916:55SNN - LHR
Nonstop1h 25mAer Lingus
Deal found 20/8£94
Mon 13/1019:10LHR - SNN
Nonstop1h 25mAer Lingus
Fri 17/1021:15SNN - LHR
Nonstop1h 25mAer Lingus
Deal found 21/8£96
Tue 2/909:50LHR - SNN
Nonstop1h 30mAer Lingus
Wed 3/921:15SNN - LHR
Nonstop1h 25mAer Lingus
Deal found 21/8£97
Tue 23/919:10LHR - SNN
Nonstop1h 25mAer Lingus
Thu 25/921:15SNN - LHR
Nonstop1h 25mAer Lingus
Deal found 21/8£98
Wed 15/1009:50LHR - SNN
Nonstop1h 30mAer Lingus
Mon 20/1021:15SNN - LHR
Nonstop1h 25mAer Lingus
Deal found 21/8£99
Mon 6/1019:10LHR - SNN
Nonstop1h 25mAer Lingus
Sat 18/1017:30SNN - LHR
Nonstop1h 25mAer Lingus
Deal found 20/8£101
Wed 24/919:10LHR - SNN
Nonstop1h 25mAer Lingus
Sun 28/921:15SNN - LHR
Nonstop1h 25mAer Lingus
Deal found 21/8£107
Sat 30/814:20LHR - SNN
Nonstop1h 30mAer Lingus
Wed 3/921:15SNN - LHR
Nonstop1h 25mAer Lingus
Deal found 20/8£108

Cheapflights Fare Finder

 
Customise your flight search to find flights from Heathrow to Shannon 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 August 2025.
Use the filters below to find and compare flights from London Heathrow Airport to Shannon that are best for you.

Fly from

Heathrow

Fly to

Shannon

Route

Depart

Return

Price

LondonShannon

LHR - SNN

LHRSNN

London Heathrow

Mon 6/10

19:10-20:35

Nonstop1h 25m

Shannon

Mon 20/10

21:15-22:40

Nonstop1h 25m

£89

LondonShannon

LHR - SNN

LHRSNN

London Heathrow

Wed 8/10

19:10-20:35

Nonstop1h 25m

Shannon

Wed 15/10

07:40-09:05

Nonstop1h 25m

£92

LondonShannon

LHR - SNN

LHRSNN

London Heathrow

Tue 16/9

19:10-20:35

Nonstop1h 25m

Shannon

Tue 23/9

16:55-18:20

Nonstop1h 25m

£94

LondonShannon

LHR - SNN

LHRSNN

London Heathrow

Wed 17/9

14:40-16:10

Nonstop1h 30m

Shannon

Wed 24/9

21:15-22:40

Nonstop1h 25m

£94

LondonShannon

LHR - SNN

LHRSNN

London Heathrow

Mon 13/10

19:10-20:35

Nonstop1h 25m

Shannon

Fri 17/10

21:15-22:40

Nonstop1h 25m

£96

LondonShannon

LHR - SNN

LHRSNN

London Heathrow

Tue 7/10

14:40-16:10

Nonstop1h 30m

Shannon

Sat 11/10

17:30-18:55

Nonstop1h 25m

£97

LondonShannon

LHR - SNN

LHRSNN

London Heathrow

Tue 2/9

14:40-16:10

Nonstop1h 30m

Shannon

Tue 2/9

21:15-22:40

Nonstop1h 25m

£97

LondonShannon

LHR - SNN

LHRSNN

London Heathrow

Tue 2/9

09:50-11:20

Nonstop1h 30m

Shannon

Wed 3/9

21:15-22:40

Nonstop1h 25m

£97

LondonShannon

LHR - SNN

LHRSNN

London Heathrow

Tue 23/9

19:10-20:35

Nonstop1h 25m

Shannon

Thu 25/9

21:15-22:40

Nonstop1h 25m

£98

LondonShannon

LHR - SNN

LHRSNN

London Heathrow

Wed 15/10

09:50-11:20

Nonstop1h 30m

Shannon

Mon 20/10

21:15-22:40

Nonstop1h 25m

£99

Flights are sorted by cheapest return flights first.

Deals found on 20/8

Showing 1-10 of 23 results
1
2
3

Best time to book a flight from Heathrow to Shannon

Have a flexible travel schedule? Discover the best time to fly to Shannon 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 Shannon

How far ahead should I book a flight from London Heathrow Airport to Shannon, Clare?

Use this chart to determine the optimal time to book a return flight from Heathrow to Shannon. Price data was last updated on 8 August 2025.

To ensure you get the cheapest price possible for a flight from London Heathrow Airport to Shannon, Clare, you should look to book at least 80 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

What is the cheapest month to book a flight from London Heathrow Airport to Shannon, Clare?

Currently, January is the cheapest month in which you can book a flight from London Heathrow Airport to Shannon, Clare (average of £69). Flying from London Heathrow Airport to Shannon, Clare in August is currently the most expensive (average of £120). 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 SNN?

Find hourly flight availability from Heathrow to Shannon. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 22 August 2025.

When flying from London Heathrow Airport to Shannon, Clare, the time of day you fly usually plays a role in the price. Save by searching for a flight in the afternoon, which can drop the price by up to 65% versus a flight in the morning.

What is the cheapest day to fly from London Heathrow Airport to Shannon, Clare?

Use this chart to determine the cheapest time to fly return from Heathrow to Shannon. Price data was last updated on 17 August 2025.

Travellers seeking maximum savings on their London Heathrow Airport to Shannon, Clare flight should consider departing on Tuesday evenings when fares are most often at their lowest. Tuesday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

Reviews of airlines servicing Shannon

Get insights into the airlines that provide service to Shannon. 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 Shannon. Reviews last updated 22 August 2025.
Check out reviews from past customers who have flown with Aer Lingus and British Airways from London Heathrow Airport to Shannon to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Aer Lingus
7.1
Good
1,228 reviews
Check prices

Entertainment

6.9

Comfort

7.1

Food

6.5

Boarding

7.3

Crew

8.0

Overall

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

LHR - DUB

The lack of headphones impacted our ability to enjoy the entertainment system provided. The fact that my last connection was associated with an "affiliated airline" that did not allow me to retrieve a check in or a boarding pass via the app almost posed a significant issue as the last leg of the flight was overbooked and we were stressed about getting a seat as a result.
Aer Lingus
7.1
Good
1,228 reviews
Aer Lingus
7.1
Good
1,228 reviews
Check prices

Entertainment

6.9

Comfort

7.1

Food

6.5

Boarding

7.3

Crew

8.0

Overall

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

LHR - DUB

The lack of headphones impacted our ability to enjoy the entertainment system provided. The fact that my last connection was associated with an "affiliated airline" that did not allow me to retrieve a check in or a boarding pass via the app almost posed a significant issue as the last leg of the flight was overbooked and we were stressed about getting a seat as a result.
British Airways
6.7
Okay
7,292 reviews
Aer Lingus
7.1
Good
1,228 reviews
Check prices

Entertainment

6.9

Comfort

7.1

Food

6.5

Boarding

7.3

Crew

8.0

Overall

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

LHR - DUB

The lack of headphones impacted our ability to enjoy the entertainment system provided. The fact that my last connection was associated with an "affiliated airline" that did not allow me to retrieve a check in or a boarding pass via the app almost posed a significant issue as the last leg of the flight was overbooked and we were stressed about getting a seat as a result.

Related info for your journey

Find useful and relevant information for your journey from Heathrow to Shannon. 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 Shannon from London Heathrow?

    For a flight from London Heathrow to Shannon, you will be flying into Shannon. Shannon (SNN) is just 2.1 mi from the center of the city. Shannon is the only Shannon airport and it handles 12 inbound flights from London Heathrow per day. 2 airlines have flights to Shannon from London Heathrow on a regular basis.

  • How long is the flight from London Heathrow Airport to Shannon, Clare?

    For as low as £89, Aer Lingus can have you in Shannon, Clare from London Heathrow Airport in 1h 25m. Airlines will cover a distance of 368 mi. Most flights are nonstop.

  • What are the cheapest airlines flying from London Heathrow Airport to Shannon, Clare round-trip?

    Flying on Aer Lingus is currently your cheapest option to Shannon, Clare, with prices starting at £84. Another option worth looking into is British Airways, starting at £168 return. Aer Lingus is priced at 34% lower than the current average price of a flight leaving 3 months from now.

  • What are the most reliable airlines from London Heathrow Airport to Shannon, Clare?

    Before booking your flight to Shannon, Clare from London Heathrow Airport, check out the most reliable airlines to get you to your destination on time: American Airlines (72%), Qatar Airways (72%), Air Canada( 72%).

  • What are the cheapest flights from London Heathrow Airport to Shannon, Clare?

    While on average a flight from London Heathrow Airport to Shannon, Clare is generally £279, our data shows the cheapest flight currently is £83. When looking at the most popular route, (London Heathrow - Shannon), you can expect to pay £89 for that flight.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Heathrow to Shannon 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 Shannon, Clare?

    Currently, January is the cheapest month in which you can book a flight from London Heathrow Airport to Shannon, Clare (average of £69). Flying from London Heathrow Airport to Shannon, Clare in August is currently the most expensive (average of £120). 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 Shannon?

Book flights to Shannon if you plan to visit one of these locations
Ennis
Tipperary

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Alternative routes for Heathrow to Shannon

See prices for flight routes from nearby airports that may be better suited for you.
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Top 2 airlines flying from Heathrow to Shannon

Discover the top 2 airlines that operate flights from Heathrow to Shannon. 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 22 August 2025.
AirlineCheapestAverageFlexibilityOn-time
Aer LingusCheapest£84Average£136FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
British AirwaysCheapest£168Average£236FlexibilityNo cancel feeOn-time70%
Search British Airways flights

Fly with Cheapflights

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

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

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from Heathrow to Shannon.

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

Yes! Cheapflights helps users easily find flights from Heathrow to Shannon with no change fees.

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