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Cheap flights from Shannon to London Heathrow Airport from £37

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 10/1. Fares are subject to change and may not be available on all flights or dates of travel.
SNN — LHR
4 Jan — 11 Jan1
1 adult
1 adult, Economy, 0 bags

Cheap 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 5 December 2025.

Sat 6/1217:25SNN - LHR
Nonstop1h 25mAer Lingus
Wed 10/1218:05LHR - SNN
Nonstop1h 20mAer Lingus
Deal found 4/12£107
Fri 5/1220:05SNN - LHR
Nonstop1h 20mAer Lingus
Tue 9/1218:05LHR - SNN
Nonstop1h 20mAer Lingus
Deal found 3/12£118
Mon 8/1220:05SNN - LHR
Nonstop1h 20mAer Lingus
Wed 10/1218:05LHR - SNN
Nonstop1h 20mAer Lingus
Deal found 3/12£121
Tue 9/1207:50SNN - LHR
Nonstop1h 25mAer Lingus
Wed 10/1215:15LHR - SNN
Nonstop1h 30mAer Lingus
Deal found 3/12£127
Mon 15/1220:05SNN - LHR
Nonstop1h 20mAer Lingus
Fri 6/318:05LHR - SNN
Nonstop1h 20mAer Lingus
Deal found 3/12£127
Mon 15/1220:05SNN - LHR
Nonstop1h 20mAer Lingus
Thu 18/1218:05LHR - SNN
Nonstop1h 20mAer Lingus
Deal found 3/12£128
Thu 11/1220:05SNN - LHR
Nonstop1h 20mAer Lingus
Fri 12/1218:05LHR - SNN
Nonstop1h 20mAer Lingus
Deal found 4/12£134
Mon 15/1220:05SNN - LHR
Nonstop1h 20mAer Lingus
Tue 16/1215:15LHR - SNN
Nonstop1h 30mAer Lingus
Deal found 3/12£136
Fri 12/1220:05SNN - LHR
Nonstop1h 20mAer Lingus
Sun 14/1210:00LHR - SNN
Nonstop1h 30mAer Lingus
Deal found 4/12£145
Tue 9/1217:30SNN - LHR
Nonstop1h 25mMultiple Airlines
Wed 7/110:00LHR - SNN
Nonstop1h 30mMultiple Airlines
Deal found 3/12£147
Sun 21/1217:30SNN - LHR
Nonstop1h 25mAer Lingus
Sun 28/1215:15LHR - SNN
Nonstop1h 30mAer Lingus
Deal found 3/12£149

Find 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 5 December 2025.

Round-trip from

£82

One-way from

£37

Popular in

August

Cheapest in

February

Average price

£137

Good round-trip deal

£118 or less

Good one-way deal

£55 or less
Aer Lingus
  • Aer Lingus
  • 10/1-17/1
  • Nonstop
  • 2h 55m total
  • Shannon to London
Search Deals
Aer Lingus
  • Aer Lingus
  • 10/1
  • Nonstop
  • 1h 25m total
  • Shannon to London
Search Deals
Highest demand for flights based on searches. 9% potential increase in price (£10 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£3 potential savings vs. average return price).
Search Deals
Average for round-trip flights in December 2025
Search Deals
Price to beat on a round-trip flight from Shannon to London Heathrow.
Search Deals
Price to beat on a one-way flight from Shannon to London Heathrow.
Search Deals

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 5 December 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

Sat 10/1

17:25-18:50

Nonstop1h 25m

London Heathrow

Mon 12/1

15:15-16:45

Nonstop1h 30m

£82

ShannonLondon

SNN - LHR

SNNLHR

Shannon

Sat 17/1

17:25-18:50

Nonstop1h 25m

London Heathrow

Sat 24/1

10:00-11:30

Nonstop1h 30m

£87

ShannonLondon

SNN - LHR

SNNLHR

Shannon

Wed 4/2

17:30-18:55

Nonstop1h 25m

London Heathrow

Sun 22/3

10:00-11:30

Nonstop1h 30m

£101

ShannonLondon

SNN - LHR

SNNLHR

Shannon

Mon 15/12

20:05-21:25

Nonstop1h 20m

London Heathrow

Thu 5/3

18:05-19:25

Nonstop1h 20m

£127

ShannonLondon

SNN - LHR

SNNLHR

Shannon

Wed 17/12

20:05-21:25

Nonstop1h 20m

London Heathrow

Fri 6/3

18:05-19:25

Nonstop1h 20m

£127

ShannonLondon

SNN - LHR

SNNLHR

Shannon

Mon 15/12

20:05-21:25

Nonstop1h 20m

London Heathrow

Mon 2/3

18:05-19:25

Nonstop1h 20m

£127

ShannonLondon

SNN - LHR

SNNLHR

Shannon

Tue 16/12

20:05-21:25

Nonstop1h 20m

London Heathrow

Fri 6/3

18:05-19:25

Nonstop1h 20m

£127

ShannonLondon

SNN - LHR

SNNLHR

Shannon

Wed 17/12

20:05-21:25

Nonstop1h 20m

London Heathrow

Mon 2/3

18:05-19:25

Nonstop1h 20m

£127

ShannonLondon

SNN - LHR

SNNLHR

Shannon

Wed 17/12

20:05-21:25

Nonstop1h 20m

London Heathrow

Thu 5/3

18:05-19:25

Nonstop1h 20m

£127

ShannonLondon

SNN - LHR

SNNLHR

Shannon

Thu 8/1

20:05-21:25

Nonstop1h 20m

London Heathrow

Sun 11/1

10:00-11:30

Nonstop1h 30m

£127

Flights are sorted by cheapest return flights first.

Deals found on 4/12

Showing 1-10 of 23 results
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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 £31). Flying from Shannon, Clare to London Heathrow Airport in July is currently the most expensive (average of £114). 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 5 December 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.

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 5 December 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
1,385 reviews
Check prices

Crew

8.0

Boarding

7.4

Food

6.6

Comfort

7.1

Overall

7.2

Entertainment

6.9

Reviews

1 / 20
8.0
Excellent

Anonymous,Nov 2025

DUB - EDI

Fine except for app. Couldn’t check in online - kept saying I couldn’t check in until the morning after my flight. On second leg I could check in but couldn’t get my boarding pass into my wallet. Thankfully I took a screenshot of it because I couldn’t retrieve it when we boarded - the app prohibited it.
Aer Lingus
7.2
Good
1,385 reviews
Aer Lingus
7.2
Good
1,385 reviews
Check prices

Crew

8.0

Boarding

7.4

Food

6.6

Comfort

7.1

Overall

7.2

Entertainment

6.9

Reviews

1 / 20
8.0
Excellent

Anonymous,Nov 2025

DUB - EDI

Fine except for app. Couldn’t check in online - kept saying I couldn’t check in until the morning after my flight. On second leg I could check in but couldn’t get my boarding pass into my wallet. Thankfully I took a screenshot of it because I couldn’t retrieve it when we boarded - the app prohibited it.

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 25m. 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 (£71), offers the cheapest pricing from Shannon, Clare to London Heathrow Airport. This flight start at 44% 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 Air Canada (77%), Qatar Airways (75%) and British Airways (75%).

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

    While on average a flight from Shannon, Clare to London Heathrow Airport is generally £121, our data shows the cheapest flight currently is £48. When looking at the most popular route, (Shannon - London Heathrow), you can expect to pay £95 for that flight.

  • 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 £31). Flying from Shannon, Clare to London Heathrow Airport in July is currently the most expensive (average of £114). 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
Northampton
Hounslow
Slough
Gatwick
Luton
Ilford
Wembley
Colchester
Brentford
Watford
Hayes
Crawley
Deal
Winchester
Swindon
Romford
Bedford
Chichester

Browse thousands of different options on Cheapflights for your next trip

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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 5 December 2025.
AirlineCheapestAverageFlexibilityOn-time
Aer LingusCheapest£71Average£130FlexibilityNo 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 Shannon to Heathrow?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Shannon to Heathrow. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

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

Millions of users choose and trust Cheapflights to book the best flight deals from Shannon to Heathrow for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

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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