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Cheap flights from London Heathrow Airport to Shannon from £45

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 27/5. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — SNN
23 May — 30 May1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from London Heathrow to Shannon are usually found in February or January, booked 62 days in advance, depart on a Friday or Thursday and return on a Wednesday

Cheap flight deals from Heathrow to Shannon

Enter your travel dates to find the best prices.

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 23 April 2026.

Tue 19/509:50
LHR
-
SNN
Nonstop1h 30m
Aer Lingus
Tue 26/521:15
SNN
-
LHR
Nonstop1h 25m
Aer Lingus
Deal found 21/4£92
Wed 20/514:40
LHR
-
SNN
Nonstop1h 30m
Aer Lingus
Tue 9/616:50
SNN
-
LHR
Nonstop1h 30m
Aer Lingus
Deal found 20/4£94
Wed 20/514:40
LHR
-
SNN
Nonstop1h 30m
Aer Lingus
Tue 26/521:15
SNN
-
LHR
Nonstop1h 25m
Aer Lingus
Deal found 19/4£95
Tue 5/519:10
LHR
-
SNN
Nonstop1h 25m
Aer Lingus
Sat 9/516:50
SNN
-
LHR
Nonstop1h 30m
Aer Lingus
Deal found 19/4£98
Tue 12/519:10
LHR
-
SNN
Nonstop1h 25m
Aer Lingus
Tue 19/521:15
SNN
-
LHR
Nonstop1h 25m
Aer Lingus
Deal found 21/4£98
Tue 19/519:10
LHR
-
SNN
Nonstop1h 25m
Aer Lingus
Tue 2/621:15
SNN
-
LHR
Nonstop1h 25m
Aer Lingus
Deal found 19/4£104
Wed 20/514:40
LHR
-
SNN
Nonstop1h 30m
Aer Lingus
Wed 27/521:15
SNN
-
LHR
Nonstop1h 25m
Aer Lingus
Deal found 22/4£108
Wed 13/514:40
LHR
-
SNN
Nonstop1h 30m
Aer Lingus
Sat 16/517:25
SNN
-
LHR
Nonstop1h 30m
Aer Lingus
Deal found 22/4£111

Find 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 23 April 2026.

Round-trip from

£92

One-way from

£45

Popular in

December

Cheapest in

February

Average price

£144

Good round-trip deal

£136 or less

Good one-way deal

£82 or less
Aer Lingus
  • Aer Lingus
  • 19/5-26/5
  • Nonstop
  • 2h 55m total
  • London to Shannon
Search Deals
Aer Lingus
  • Aer Lingus
  • 27/5
  • Nonstop
  • 1h 25m total
  • London to Shannon
Search Deals
High demand for flights, 1% potential price rise
Search Deals
Cheapest flight prices on average. 1% potential price decrease (£2 potential savings vs. average return price).
Search Deals
Average for round-trip flights in April 2026
Search Deals
Price to beat on a round-trip flight from London Heathrow to Shannon.
Search Deals
Price to beat on a one-way flight from London Heathrow to Shannon.
Search Deals

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 23 April 2026.
Use the filters below to find and compare flights from London Heathrow Airport to Shannon that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonShannon

LHR - SNN

LHRSNN

London Heathrow

Tue 5/5

19:10-20:35

Nonstop1h 25m

Shannon

Sat 16/5

17:25-18:55

Nonstop1h 30m

£123
Fastest return journey

LondonShannon

LHR - SNN

LHRSNN

London Heathrow

Fri 31/7

19:10-20:35

Nonstop1h 25m

Shannon

Tue 4/8

21:15-22:40

Nonstop1h 25m

£156

LondonShannon

LHR - SNN

LHRSNN

London Heathrow

Sat 25/7

14:20-15:50

Nonstop1h 30m

Shannon

Tue 28/7

16:50-18:20

Nonstop1h 30m

£194

LondonShannon

LHR - SNN

LHRSNN

London Heathrow

Fri 4/9

19:10-20:35

Nonstop1h 25m

Shannon

Thu 10/9

21:15-22:40

Nonstop1h 25m

£210

LondonShannon

LHR - SNN

LHRSNN

London Heathrow

Wed 20/5

14:40-16:10

Nonstop1h 30m

Shannon

Tue 26/5

21:15-22:40

Nonstop1h 25m

£221

LondonShannon

LHR - SNN

LHRSNN

London Heathrow

Tue 19/5

14:40-16:10

Nonstop1h 30m

Shannon

Wed 20/5

21:15-22:40

Nonstop1h 25m

£221

LondonShannon

LHR - SNN

LHRSNN

London Heathrow

Thu 11/6

19:10-20:35

Nonstop1h 25m

Shannon

Sun 14/6

21:15-22:40

Nonstop1h 25m

£221

LondonShannon

LHR - SNN

LHRSNN

London Heathrow

Tue 5/5

09:50-11:20

Nonstop1h 30m

Shannon

Sat 9/5

07:30-09:05

Nonstop1h 35m

£221

LondonShannon

LHR - SNN

LHRSNN

London Heathrow

Wed 6/5

19:10-20:35

Nonstop1h 25m

Shannon

Sun 10/5

07:30-09:05

Nonstop1h 35m

£221

LondonShannon

LHR - SNN

LHRSNN

London Heathrow

Thu 3/9

09:50-11:20

Nonstop1h 30m

Shannon

Sun 13/9

16:50-18:20

Nonstop1h 30m

£228

Flights are sorted by cheapest return flights first.

Deals found on 18/4

Showing 1-10 of 16 resultsSorted by cheapest first
1
2

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 17 April 2026.

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 62 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, February is the cheapest month in which you can book a flight from London Heathrow Airport to Shannon, Clare (average of £117). Flying from London Heathrow Airport to Shannon, Clare in December is currently the most expensive (average of £152). 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 23 April 2026.

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 63% 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 18 April 2026.

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

How much does it cost for a return flight from London Heathrow Airport to Shannon, Clare?

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 23 April 2026.
Check out reviews from past customers who have flown with Aer Lingus 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
7.3
Good
1,521 reviews
Check prices

Entertainment

7.0

Food

6.6

Boarding

7.4

Comfort

7.2

Crew

8.1

Overall

7.3

Reviews

1 / 20
2.0
Mediocre

Wendy,Mar 2026

YYZ - DUB

I didn’t happen, my seat was given away because even though my bag was checked through to Dublin apparently the previous airline didn’t check me in. Even when I asked specifically at check in they said I and my luggage we both checked all the way through.
Aer Lingus
7.3
Good
1,521 reviews
Aer Lingus
7.3
Good
1,521 reviews
Check prices

Entertainment

7.0

Food

6.6

Boarding

7.4

Comfort

7.2

Crew

8.1

Overall

7.3

Reviews

1 / 20
2.0
Mediocre

Wendy,Mar 2026

YYZ - DUB

I didn’t happen, my seat was given away because even though my bag was checked through to Dublin apparently the previous airline didn’t check me in. Even when I asked specifically at check in they said I and my luggage we both checked all the way through.

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. 1 airline has 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 £123, 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 is the cheapest airline to fly 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 £95. Aer Lingus is priced at 29% 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: Qatar Airways (82%), Aer Lingus (82%), British Airways( 82%).

  • 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 £293, our data shows the cheapest flight currently is £49. When looking at the most popular route, (London Heathrow - Shannon), you can expect to pay £98 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, February is the cheapest month in which you can book a flight from London Heathrow Airport to Shannon, Clare (average of £117). Flying from London Heathrow Airport to Shannon, Clare in December is currently the most expensive (average of £152). 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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Top airline flying from Heathrow to Shannon

Discover the top airline 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 23 April 2026.
AirlineCheapestAverageFlexibilityOn-time
Aer LingusCheapest£95Average£137FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights

Fly with Cheapflights

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

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to Shannon from Heathrow today with Cheapflights!

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.

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

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

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