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Cheap flights from Shannon to London Heathrow Airport from £36

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 11/10. Fares are subject to change and may not be available on all flights or dates of travel.
SNN — LHR
17 Oct — 24 Oct1
1 adult
1 adult, Economy

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 17 September 2025.

Round-trip from

£70

One-way from

£36

Popular in

August

Cheapest in

February

Average price

£120

Good round-trip deal

£135 or less

Good one-way deal

£46 or less
Aer Lingus
  • Aer Lingus
  • 15/10-16/10
  • Nonstop
  • 2h 55m total
  • Shannon to London
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Aer Lingus
  • Aer Lingus
  • 11/10
  • Nonstop
  • 1h 25m total
  • Shannon to London
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Highest demand for flights based on searches. 11% potential increase in price (£12 potential increase over avg. return price).
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Cheapest flight prices on average. 3% potential price decrease (£3 potential savings vs. average return price).
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Average for round-trip flights in September 2025
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Price to beat on a round-trip flight from Shannon to London Heathrow.
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Price to beat on a one-way flight from Shannon to London Heathrow.
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Find flight deals from Shannon to Heathrow

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 17 September 2025.

Tue 14/1021:15SNN - LHR
Nonstop1h 25mAer Lingus
Tue 21/1014:40LHR - SNN
Nonstop1h 30mAer Lingus
Deal found 16/9£71
Sat 11/1017:30SNN - LHR
Nonstop1h 25mAer Lingus
Mon 13/1019:10LHR - SNN
Nonstop1h 25mAer Lingus
Deal found 16/9£77
Fri 3/1021:15SNN - LHR
Nonstop1h 25mAer Lingus
Tue 7/1019:10LHR - SNN
Nonstop1h 25mAer Lingus
Deal found 16/9£78
Fri 10/1021:15SNN - LHR
Nonstop1h 25mAer Lingus
Mon 13/1019:10LHR - SNN
Nonstop1h 25mAer Lingus
Deal found 15/9£78
Wed 15/1016:55SNN - LHR
Nonstop1h 25mAer Lingus
Thu 16/1014:40LHR - SNN
Nonstop1h 30mAer Lingus
Deal found 16/9£79
Tue 30/921:15SNN - LHR
Nonstop1h 25mAer Lingus
Wed 8/1019:10LHR - SNN
Nonstop1h 25mAer Lingus
Deal found 14/9£86
Thu 25/921:15SNN - LHR
Nonstop1h 25mAer Lingus
Wed 1/1019:10LHR - SNN
Nonstop1h 25mAer Lingus
Deal found 15/9£87
Sat 4/1017:30SNN - LHR
Nonstop1h 25mAer Lingus
Mon 6/1019:10LHR - SNN
Nonstop1h 25mAer Lingus
Deal found 15/9£89
Fri 31/1020:05SNN - LHR
Nonstop1h 20mAer Lingus
Fri 7/1118:05LHR - SNN
Nonstop1h 20mAer Lingus
Deal found 16/9£92
Wed 8/1016:55SNN - LHR
Nonstop1h 25mAer Lingus
Sat 11/1014:20LHR - SNN
Nonstop1h 30mAer Lingus
Deal found 15/9£93
Fri 17/1021:15SNN - LHR
Nonstop1h 25mAer Lingus
Sun 19/1009:50LHR - SNN
Nonstop1h 30mAer Lingus
Deal found 16/9£95
Thu 30/1020:05SNN - LHR
Nonstop1h 20mAer Lingus
Thu 6/1115:15LHR - SNN
Nonstop1h 30mAer Lingus
Deal found 15/9£96

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 17 September 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

Mon 13/10

21:15-22:40

Nonstop1h 25m

London Heathrow

Mon 20/10

19:10-20:35

Nonstop1h 25m

£77

ShannonLondon

SNN - LHR

SNNLHR

Shannon

Fri 3/10

21:15-22:40

Nonstop1h 25m

London Heathrow

Fri 10/10

19:10-20:35

Nonstop1h 25m

£78

ShannonLondon

SNN - LHR

SNNLHR

Shannon

Thu 2/10

21:15-22:40

Nonstop1h 25m

London Heathrow

Sun 5/10

09:50-11:20

Nonstop1h 30m

£78

ShannonLondon

SNN - LHR

SNNLHR

Shannon

Sat 4/10

17:30-18:55

Nonstop1h 25m

London Heathrow

Mon 6/10

19:10-20:35

Nonstop1h 25m

£89

ShannonLondon

SNN - LHR

SNNLHR

Shannon

Thu 30/10

20:05-21:25

Nonstop1h 20m

London Heathrow

Thu 6/11

15:15-16:45

Nonstop1h 30m

£96

ShannonLondon

SNN - LHR

SNNLHR

Shannon

Thu 23/10

21:15-22:40

Nonstop1h 25m

London Heathrow

Fri 31/10

15:15-16:45

Nonstop1h 30m

£100

ShannonLondon

SNN - LHR

SNNLHR

Shannon

Fri 24/10

21:15-22:40

Nonstop1h 25m

London Heathrow

Mon 27/10

10:00-11:30

Nonstop1h 30m

£103

ShannonLondon

SNN - LHR

SNNLHR

Shannon

Sun 28/9

07:40-09:05

Nonstop1h 25m

London Heathrow

Tue 14/10

14:40-16:10

Nonstop1h 30m

£133

ShannonLondon

SNN - LHR

SNNLHR

Shannon

Tue 14/10

13:00-20:20

2 stops7h 20m

London Heathrow

Tue 21/10

19:10-20:35

Nonstop1h 25m

£148

ShannonLondon

SNN - LHR

SNNLHR

Shannon

Fri 31/10

20:05-21:25

Nonstop1h 20m

London Heathrow

Fri 7/11

18:05-19:25

Nonstop1h 20m

£150

Flights are sorted by cheapest return flights first.

Deals found on 15/9

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, January is the cheapest month in which you can book a flight from Shannon, Clare to London Heathrow Airport (average of £112). Flying from Shannon, Clare to London Heathrow Airport in August is currently the most expensive (average of £164). 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 17 September 2025.

Unlike in the morning, when flights are generally more expensive, you can save up to 80% on flights from Shannon, Clare to London Heathrow Airport by exploring options for tickets in the afternoon.

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 17 September 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
1,274 reviews
Check prices

Entertainment

6.9

Boarding

7.3

Comfort

7.1

Crew

8.0

Overall

7.2

Food

6.5

Reviews

1 / 20
4.0
Okay

Anonymous,Jul 2025

DUB - ORD

The inability to check in with the final leg of our flight via the Aers Lingus app led to a stressful trip as the final leg was overbooked and we were not able to confirm a seat until we had arrived to Chicago. Lack of earphones for the "entertainment" system were not voluntarily provided or even referenced as available (even for a charge) while boarding the plane - this seems like an oversight.
Aer Lingus
7.2
Good
1,274 reviews
Aer Lingus
7.2
Good
1,274 reviews
Check prices

Entertainment

6.9

Boarding

7.3

Comfort

7.1

Crew

8.0

Overall

7.2

Food

6.5

Reviews

1 / 20
4.0
Okay

Anonymous,Jul 2025

DUB - ORD

The inability to check in with the final leg of our flight via the Aers Lingus app led to a stressful trip as the final leg was overbooked and we were not able to confirm a seat until we had arrived to Chicago. Lack of earphones for the "entertainment" system were not voluntarily provided or even referenced as available (even for a charge) while boarding the plane - this seems like an oversight.

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 (£70), offers the cheapest pricing from Shannon, Clare to London Heathrow Airport. This flight start at 41% 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 (78%), British Airways (73%) and Aer Lingus (73%).

  • 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 £137, our data shows the cheapest flight currently is £36. When looking at the most popular route, (Shannon - London Heathrow), you can expect to pay £77 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, January is the cheapest month in which you can book a flight from Shannon, Clare to London Heathrow Airport (average of £112). Flying from Shannon, Clare to London Heathrow Airport in August is currently the most expensive (average of £164). 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
Hounslow
Slough
Gatwick
Northampton
Luton
Deal
Wembley
Ilford
Crawley
Hayes
Watford
Winchester
Chichester
Ipswich
Swindon
Dartford
Guildford
Brentford

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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 17 September 2025.
AirlineCheapestAverageFlexibilityOn-time
Aer LingusCheapest£70Average£128FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights

Fly with Cheapflights

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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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