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Cheap flights from Shannon to London Heathrow Airport 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 29/11. Fares are subject to change and may not be available on all flights or dates of travel.
SNN — LHR
6 Dec — 13 Dec1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Shannon to Heathrow

Discover tips and strategies to find the most affordable flight options for your journey from Shannon (SNN) to Heathrow (LHR). 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 6 November 2025.

Round-trip from

£94

One-way from

£48

Popular in

August

Cheapest in

February

Average price

£126
Aer Lingus
  • Aer Lingus
  • 3/12-10/12
  • Nonstop
  • 2h 40m total
  • Shannon to London
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Aer Lingus
  • Aer Lingus
  • 29/11
  • Nonstop
  • 1h 25m total
  • Shannon to London
Search Deals
Highest demand for flights based on searches. 10% potential increase in price (£11 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£3 potential savings vs. average return price).
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Average for round-trip flights in November 2025
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Find flight deals from Shannon to Heathrow

Enter your travel dates to find the best prices.

Cheapest flights from Shannon to Heathrow
Explore the most affordable flight options available from Shannon to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 6 November 2025.

Wed 3/1220:05SNN - LHR
Nonstop1h 20mAer Lingus
Wed 10/1218:05LHR - SNN
Nonstop1h 20mAer Lingus
Deal found 5/11£94
Mon 10/1120:05SNN - LHR
Nonstop1h 20mAer Lingus
Wed 19/1115:15LHR - SNN
Nonstop1h 30mAer Lingus
Deal found 4/11£96
Thu 13/1120:05SNN - LHR
Nonstop1h 20mAer Lingus
Wed 19/1115:15LHR - SNN
Nonstop1h 30mAer Lingus
Deal found 5/11£97
Thu 13/1120:05SNN - LHR
Nonstop1h 20mAer Lingus
Sun 16/1110:00LHR - SNN
Nonstop1h 30mAer Lingus
Deal found 4/11£97
Fri 14/1120:05SNN - LHR
Nonstop1h 20mAer Lingus
Sun 16/1110:00LHR - SNN
Nonstop1h 30mAer Lingus
Deal found 4/11£104
Fri 5/1220:05SNN - LHR
Nonstop1h 20mAer Lingus
Sun 7/1210:00LHR - SNN
Nonstop1h 30mAer Lingus
Deal found 3/11£107
Sat 15/1117:25SNN - LHR
Nonstop1h 25mAer Lingus
Mon 17/1118:05LHR - SNN
Nonstop1h 20mAer Lingus
Deal found 4/11£114
Thu 6/1120:05SNN - LHR
Nonstop1h 20mAer Lingus
Wed 12/1110:00LHR - SNN
Nonstop1h 30mAer Lingus
Deal found 4/11£114
Fri 7/1120:05SNN - LHR
Nonstop1h 20mAer Lingus
Mon 10/1110:00LHR - SNN
Nonstop1h 30mAer Lingus
Deal found 5/11£115
Tue 18/1117:30SNN - LHR
Nonstop1h 25mAer Lingus
Sat 22/1110:00LHR - SNN
Nonstop1h 30mAer Lingus
Deal found 4/11£119
Fri 5/1220:05SNN - LHR
Nonstop1h 20mAer Lingus
Mon 8/1218:05LHR - SNN
Nonstop1h 20mAer Lingus
Deal found 5/11£120

Cheapflights Fare Finder

 
Customise your flight search to find flights from Shannon to Heathrow 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 6 November 2025.
Use the filters below to find and compare flights from Shannon to London Heathrow Airport that are best for you.

Fly from

Shannon

Fly to

Heathrow

Route

Depart

Return

Price

ShannonLondon

SNN - LHR

SNNLHR

Shannon

Fri 9/1

20:05-21:25

Nonstop1h 20m

London Heathrow

Sat 10/1

14:15-15:45

Nonstop1h 30m

£97

ShannonLondon

SNN - LHR

SNNLHR

Shannon

Fri 5/12

20:05-21:25

Nonstop1h 20m

London Heathrow

Sun 7/12

10:00-11:30

Nonstop1h 30m

£107

ShannonLondon

SNN - LHR

SNNLHR

Shannon

Fri 16/1

20:05-21:25

Nonstop1h 20m

London Heathrow

Sun 18/1

15:15-16:45

Nonstop1h 30m

£114

ShannonLondon

SNN - LHR

SNNLHR

Shannon

Thu 4/12

20:05-21:25

Nonstop1h 20m

London Heathrow

Sat 6/12

14:15-15:45

Nonstop1h 30m

£114

ShannonLondon

SNN - LHR

SNNLHR

Shannon

Thu 20/11

20:05-21:25

Nonstop1h 20m

London Heathrow

Sun 23/11

10:00-11:30

Nonstop1h 30m

£119

ShannonLondon

SNN - LHR

SNNLHR

Shannon

Tue 18/11

20:05-21:25

Nonstop1h 20m

London Heathrow

Sat 22/11

10:00-11:30

Nonstop1h 30m

£119

ShannonLondon

SNN - LHR

SNNLHR

Shannon

Fri 5/12

20:05-21:25

Nonstop1h 20m

London Heathrow

Mon 8/12

10:00-11:30

Nonstop1h 30m

£120

ShannonLondon

SNN - LHR

SNNLHR

Shannon

Fri 28/11

20:05-21:25

Nonstop1h 20m

London Heathrow

Sun 30/11

10:00-11:30

Nonstop1h 30m

£124

ShannonLondon

SNN - LHR

SNNLHR

Shannon

Sat 28/2

17:25-18:50

Nonstop1h 25m

London Heathrow

Sun 1/3

10:00-11:30

Nonstop1h 30m

£131

ShannonLondon

SNN - LHR

SNNLHR

Shannon

Fri 19/12

20:05-21:25

Nonstop1h 20m

London Heathrow

Fri 26/12

18:05-19:25

Nonstop1h 20m

£149

Flights are sorted by cheapest return flights first.

Deals found on 5/11

Showing 1-10 of 24 results
1
2
3

Best time to book a flight from Shannon to Heathrow

Have a flexible travel schedule? Discover the best time to fly to Heathrow from Shannon 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 Shannon to London Heathrow Airport

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

Currently, February is the cheapest month in which you can book a flight from Shannon, Clare to London Heathrow Airport (average of £32). Flying from Shannon, Clare to London Heathrow Airport in August is currently the most expensive (average of £117). 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 SNN to LHR?

Find hourly flight availability from Shannon to Heathrow. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 6 November 2025.

When flying from Shannon, Clare to London Heathrow Airport, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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

Reviews of airlines servicing Heathrow

Get insights into the airlines that provide service to Heathrow. 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 Heathrow. Reviews last updated 6 November 2025.
See what other customers who have flown with Aer Lingus from Shannon to London Heathrow Airport have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Aer Lingus
7.2
Good
1,365 reviews
Check prices

Boarding

7.4

Entertainment

6.9

Comfort

7.1

Food

6.6

Overall

7.2

Crew

8.0

Reviews

1 / 20
6.0
Good

David,Oct 2025

DUB - IAD

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 from Dublin to Washington (Flight EI 119 on October 25, 2025) 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. Beyond being firm and actually nasty and rude. A little interpersonal communication training could help this man.
Aer Lingus
7.2
Good
1,365 reviews
Aer Lingus
7.2
Good
1,365 reviews
Check prices

Boarding

7.4

Entertainment

6.9

Comfort

7.1

Food

6.6

Overall

7.2

Crew

8.0

Reviews

1 / 20
6.0
Good

David,Oct 2025

DUB - IAD

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 from Dublin to Washington (Flight EI 119 on October 25, 2025) 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. Beyond being firm and actually nasty and rude. A little interpersonal communication training could help this man.

Related info for your journey

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

    For a flight from Shannon to London Heathrow, you will be flying from Shannon. Shannon (SNN) is just 2.1 mi from the center of the city. Shannon is the only Shannon airport and it handles 11 outbound flights to London Heathrow per day. 1 airline has flights to London Heathrow from Shannon on a regular basis.

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

    Aer Lingus can get you from Shannon, Clare to London Heathrow Airport in just under 1h 20m. Your travel time will be generally consistent. The distance from Shannon, Clare to London Heathrow Airport is about 368 mi. Most flights are nonstop.

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

    According to our current data, Aer Lingus (£73), offers the cheapest pricing from Shannon, Clare to London Heathrow Airport. This flight start at 42% lower than the current average price 3 months from now.

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

    The top 3 most reliable airlines when flying from Shannon, Clare to London Heathrow Airport are Qatar Airways (70%), British Airways (70%) and Aer Lingus (70%).

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

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

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

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

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

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

    Currently, February is the cheapest month in which you can book a flight from Shannon, Clare to London Heathrow Airport (average of £32). Flying from Shannon, Clare to London Heathrow Airport in August is currently the most expensive (average of £117). 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 London Heathrow Airport?

Book flights to London Heathrow Airport if you plan to visit one of these locations
Milton Keynes
Croydon
Slough
Gatwick
Hounslow
Northampton
Luton
Ilford
Wembley
Deal
Hayes
Colchester
Watford
Winchester
Swindon
Crawley
Brentford
Romford
Chichester
Ipswich

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Top airline flying from Shannon to Heathrow

Discover the top airline that operate flights from Shannon to Heathrow. 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 6 November 2025.
AirlineCheapestAverageFlexibilityOn-time
Aer LingusCheapest£73Average£132FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights

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

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

Cheapflights does show flights with no change fees to all users. To see these options for flights from Shannon to Heathrow, users can toggle the no change fees filter when performing a flight search.

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

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Heathrow from Shannon today and book when prices fit your budget.

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