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Cheap flights from Shannon to London Heathrow Airport from £81

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 15/5. Fares are subject to change and may not be available on all flights or dates of travel.
SNN — LHR
22 Apr — 29 Apr1
1 adult

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 April 2025.

Round-trip from

£81

Popular in

July

Cheapest in

February

Average price

£131

Good round-trip deal

£78 or less

Good one-way deal

£47 or less
Aer Lingus
  • Aer Lingus
  • 15/5-19/5
  • Nonstop
  • 2h 50m total
  • Shannon to London
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Highest demand for flights based on searches. 15% potential increase in price (£17 potential increase over avg. return price).
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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 April 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 April 2025.

Sat 31/507:40SNN - LHR
Nonstop1h 25mBritish Airways
Sat 7/614:20LHR - SNN
Nonstop1h 30mBritish Airways
Deal found 16/4£228
Sat 31/517:30SNN - LHR
Nonstop1h 25mMultiple Airlines
Sat 7/621:50LHR - SNN
1 stop14h 50mMultiple Airlines
Deal found 15/4£232
Mon 21/407:40SNN - LHR
Nonstop1h 25mAer Lingus
Wed 23/419:10LHR - SNN
Nonstop1h 25mAer Lingus
Deal found 16/4£337
Thu 15/512:30SNN - LHR
1 stop17h 25mLufthansa
Mon 19/515:20LHR - SNN
1 stop18h 55mLufthansa
Deal found 16/4£7,224
Fri 2/514:40SNN - LHR
1 stop17h 05mAmerican Airlines
Tue 6/509:45LHR - SNN
1 stop20h 10mAmerican Airlines
Deal found 16/4£7,504
Wed 7/512:30SNN - LHR
1 stop17h 25mUnited Airlines
Mon 12/518:00LHR - SNN
1 stop16h 15mUnited Airlines
Deal found 15/4£10,406

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 April 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 31/5

07:40-09:05

Nonstop1h 25m

London Heathrow

Sat 7/6

14:20-15:50

Nonstop1h 30m

£228

ShannonLondon

SNN - LHR

SNNLHR

Shannon

Sat 31/5

17:30-18:55

Nonstop1h 25m

London Heathrow

Sat 7/6

21:50-12:40

1 stop14h 50m

£232

ShannonLondon

SNN - LHR

SNNLHR

Shannon

Sun 22/6

21:15-22:40

Nonstop1h 25m

London Heathrow

Mon 23/6

14:40-16:10

Nonstop1h 30m

£409

ShannonLondon

SNN - LHR

SNNLHR

Shannon

Thu 15/5

12:30-05:55

1 stop17h 25m

London Heathrow

Mon 19/5

15:20-10:15

1 stop18h 55m

£7,224

ShannonLondon

SNN - LHR

SNNLHR

Shannon

Fri 2/5

14:40-07:45

1 stop17h 05m

London Heathrow

Tue 6/5

13:20-05:55

1 stop16h 35m

£7,504

ShannonLondon

SNN - LHR

SNNLHR

Shannon

Wed 7/5

12:30-05:55

1 stop17h 25m

London Heathrow

Mon 12/5

18:00-10:15

1 stop16h 15m

£10,406

ShannonLondon

SNN - LHR

SNNLHR

Shannon

Fri 2/5

20:00-09:45

1 stop13h 45m

£151

ShannonLondon

SNN - LHR

SNNLHR

Shannon

Tue 16/9

07:40-09:05

Nonstop1h 25m

£167

ShannonLondon

SNN - LHR

SNNLHR

Shannon

Tue 22/4

21:15-22:40

Nonstop1h 25m

£259

ShannonLondon

SNN - LHR

SNNLHR

Shannon

Thu 15/5

13:45-06:30

1 stop16h 45m

£1,159

Flights are sorted by cheapest return flights first.

Deals found on 16/4

Showing 1-10 of 12 results
1
2

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 April 2025.

Unlike in the morning, when flights are generally more expensive, you can save up to 81% on flights from Shannon, Clare to London Heathrow Airport by exploring options for tickets in the afternoon.

Weekly flight availability from Shannon, Clare to London Heathrow Airport

Explore weekly flight availability from Shannon to Heathrow. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 17 April 2025.

The most flights from SNN to LHR are scheduled on a Monday (12 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (5 on average).

Rainfall in Heathrow by month

Plan your trip to Heathrow by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in London Heathrow Airport ranges from 40.0 - 70.0 inches per month. January is typically the wettest month, when rainfall can reach 70.0 mm. July is typically the driest time to visit London Heathrow Airport when rainfall is around 40.0 mm.

Temperature in Heathrow by month

Plan your trip to Heathrow by taking into account the average temperature totals by month.

If weather is an important factor for your trip to London Heathrow Airport, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 17.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 4.0 C).

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 April 2025.
Peruse reviews from past customers who have flown with United Airlines, JetBlue and American Airlines from Shannon to London to help guide your decision. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
8,666 reviews
Check prices

Comfort

7.3

Food

6.6

Overall

7.4

Boarding

7.7

Entertainment

7.1

Crew

8.1

Reviews

1 / 20
6.0
Good

Jared,Feb 2024

LBB - DEN

There were a lot of delays. Not sure if they could be helped, but it made me super nervous about catching my already tight connection. The connection was held for me, but I had to really hurry to make it.
United Airlines
7.4
Good
8,666 reviews
United Airlines
7.4
Good
8,666 reviews
Check prices

Comfort

7.3

Food

6.6

Overall

7.4

Boarding

7.7

Entertainment

7.1

Crew

8.1

Reviews

1 / 20
6.0
Good

Jared,Feb 2024

LBB - DEN

There were a lot of delays. Not sure if they could be helped, but it made me super nervous about catching my already tight connection. The connection was held for me, but I had to really hurry to make it.
JetBlue
7.3
Good
2,926 reviews
United Airlines
7.4
Good
8,666 reviews
Check prices

Comfort

7.3

Food

6.6

Overall

7.4

Boarding

7.7

Entertainment

7.1

Crew

8.1

Reviews

1 / 20
6.0
Good

Jared,Feb 2024

LBB - DEN

There were a lot of delays. Not sure if they could be helped, but it made me super nervous about catching my already tight connection. The connection was held for me, but I had to really hurry to make it.
American Airlines
7.2
Good
10,000 reviews
United Airlines
7.4
Good
8,666 reviews
Check prices

Comfort

7.3

Food

6.6

Overall

7.4

Boarding

7.7

Entertainment

7.1

Crew

8.1

Reviews

1 / 20
6.0
Good

Jared,Feb 2024

LBB - DEN

There were a lot of delays. Not sure if they could be helped, but it made me super nervous about catching my already tight connection. The connection was held for me, but I had to really hurry to make it.
Aer Lingus
7.0
Good
1,063 reviews
United Airlines
7.4
Good
8,666 reviews
Check prices

Comfort

7.3

Food

6.6

Overall

7.4

Boarding

7.7

Entertainment

7.1

Crew

8.1

Reviews

1 / 20
6.0
Good

Jared,Feb 2024

LBB - DEN

There were a lot of delays. Not sure if they could be helped, but it made me super nervous about catching my already tight connection. The connection was held for me, but I had to really hurry to make it.
Lufthansa
6.7
Okay
7,011 reviews
United Airlines
7.4
Good
8,666 reviews
Check prices

Comfort

7.3

Food

6.6

Overall

7.4

Boarding

7.7

Entertainment

7.1

Crew

8.1

Reviews

1 / 20
6.0
Good

Jared,Feb 2024

LBB - DEN

There were a lot of delays. Not sure if they could be helped, but it made me super nervous about catching my already tight connection. The connection was held for me, but I had to really hurry to make 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.

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

    According to our current data, Aer Lingus (£81), British Airways (£213), and Lufthansa (£7,224) offers the cheapest pricing from Shannon, Clare to London Heathrow Airport. These flights start at 33% lower than the current average price 3 months from now.

  • What are the cheapest airlines to fly from Shannon, Clare to London Heathrow Airport one-way?

    To fly one-way, consider booking your trip with Aer Lingus, which is currently one of the cheapest options available, starting at £167. British Airways flights start at £259 while deals on JetBlue start at £1,159 one-way.

  • 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 American Airlines (83%), Aer Lingus (82%) and British Airways (82%).

  • 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 £74, our data shows the cheapest flight currently is £40. When looking at the most popular route, (Shannon - London Heathrow), you can expect to pay £81 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 Shannon?

Book flights to Shannon if you plan to visit one of these locations
Hounslow
Deal
Milton Keynes
Gatwick
Luton
Slough
Croydon
Eastbourne
Wembley
Northampton
Hayes
Crawley
Southend-on-Sea
Maidstone
Swindon
Ipswich
Southall
Ilford
Winchester
Folkestone

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 17 April 2025.
AirlineCheapestAverageFlexibilityOn-time
Aer LingusCheapest£72Average£112FlexibilityNo 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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