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$121+ Cheap flights from Shannon (SNN) to Heathrow (LHR)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/6. Fares are subject to change and may not be available on all flights or dates of travel.
SNN — LHR
Mar 30 — Apr 61
Sun 3/30
Sun 4/6
1 adult, Economy
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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 March 25, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$121
(Aer Lingus)

Popular in

July

Cheapest in

February

Average price

$151

Good round-trip deal

$103 or less

Good one-way deal

$121 or less
Provider with most accurate pricing for Shannon-London Heathrow flight deals.
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Provider most trusted by Cheapflights users for Shannon-London Heathrow flights.
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From Shannon to London Heathrow
Search Deals
Highest demand for flights based on searches. 16% potential increase in price ($30 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($4 potential savings vs. average RT price).
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Average for round-trip flights in March 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 March 25, 2025.

This British Airways deal was found by Cheapflights users on 3/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/245:30 pmSNN - LHR
Nonstop1h 25mBritish Airways
Fri 3/286:05 pmLHR - SNN
Nonstop1h 20mBritish Airways
Deal found 3/24$929
This Gotogate deal was found by Cheapflights users on 3/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/61:45 pmSNN - LHR
1 stop17h 35mMultiple Airlines
Wed 5/79:55 amLHR - SNN
2 stops25h 55mMultiple Airlines
Deal found 3/25$3,436
This United Airlines deal was found by Cheapflights users on 3/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/812:30 pmSNN - LHR
1 stop17h 25mUnited Airlines
Thu 5/154:00 pmLHR - SNN
1 stop18h 15mUnited Airlines
Deal found 3/24$13,349

Cheapflights Fare Finder

Customize 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 2,558,603 searches. Data last updated March 25, 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

Wed 4/9

7:40 am-9:05 am

Nonstop1h 25m

London Heathrow

Sun 4/13

2:35 pm-4:05 pm

Nonstop1h 30m

$929

ShannonLondon

SNN - LHR

SNNLHR

Shannon

Tue 5/6

1:45 pm-7:20 am

1 stop17h 35m

London Heathrow

Wed 5/7

9:55 am-11:50 am

2 stops25h 55m

$3,436

ShannonLondon

SNN - LHR

SNNLHR

Shannon

Thu 5/8

12:30 pm-5:55 am

1 stop17h 25m

London Heathrow

Thu 5/15

4:00 pm-10:15 am

1 stop18h 15m

$13,349

ShannonLondon

SNN - LHR

SNNLHR

Shannon

Fri 6/13

3:35 pm-9:10 pm

1 stop5h 35m

$179

ShannonLondon

SNN - LHR

SNNLHR

Shannon

Sun 9/21

1:45 pm-6:30 am

1 stop16h 45m

$1,132

ShannonLondon

SNN - LHR

SNNLHR

Shannon

Sun 4/27

2:40 pm-7:45 am

1 stop17h 05m

$1,898

ShannonLondon

SNN - LHR

SNNLHR

Shannon

Fri 8/29

12:30 pm-8:40 pm

1 stop32h 10m

$3,343

ShannonLondon

SNN - LHR

SNNLHR

Shannon

Tue 7/8

9:30 am-8:20 am

1 stop22h 50m

$4,561

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/25

Compare providers for flights from Shannon to Heathrow

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Shannon to Heathrow in March.
ProviderPrice AccuracyTrust Score*
eDreamsPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Shannon, Clare-London Heathrow Airport flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Shannon, Clare-London Heathrow Airport flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Shannon, Clare-London Heathrow Airport flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Shannon, Clare-London Heathrow Airport flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Shannon, Clare-London Heathrow Airport flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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 round-trip 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, November is the cheapest month in which you can book a flight from Shannon, Clare to London Heathrow Airport (average of $661). Flying from Shannon, Clare to London Heathrow Airport in June is currently the most expensive (average of $1,115). 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 March 25, 2025.

When flying from Shannon, Clare to London Heathrow Airport, 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 77% versus a flight in the morning.

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 March 25, 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 (9 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 1.6 - 2.8 inches per month. January is typically the wettest month, when rainfall can reach 2.8 in. July is typically the driest time to visit London Heathrow Airport when rainfall is around 1.6 in.

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 62.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 39.2 F).

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 March 25, 2025.
United Airlines
7.4
Good
8,605 reviews

Boarding

7.7

Comfort

7.3

Entertainment

7.0

Overall

7.4

Food

6.6

Crew

8.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
United Airlines
7.4
Good
8,605 reviews
United Airlines
7.4
Good
8,605 reviews

Boarding

7.7

Comfort

7.3

Entertainment

7.0

Overall

7.4

Food

6.6

Crew

8.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
JetBlue
7.3
Good
2,924 reviews
United Airlines
7.4
Good
8,605 reviews

Boarding

7.7

Comfort

7.3

Entertainment

7.0

Overall

7.4

Food

6.6

Crew

8.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
Aer Lingus
7.0
Good
1,061 reviews
United Airlines
7.4
Good
8,605 reviews

Boarding

7.7

Comfort

7.3

Entertainment

7.0

Overall

7.4

Food

6.6

Crew

8.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
Lufthansa
6.7
Okay
6,949 reviews
United Airlines
7.4
Good
8,605 reviews

Boarding

7.7

Comfort

7.3

Entertainment

7.0

Overall

7.4

Food

6.6

Crew

8.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
British Airways
6.6
Okay
6,713 reviews
United Airlines
7.4
Good
8,605 reviews

Boarding

7.7

Comfort

7.3

Entertainment

7.0

Overall

7.4

Food

6.6

Crew

8.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??

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?

    Most people fly from Shannon (SNN) if they book a flight from Shannon to London Heathrow. On average, Shannon has 11 outbound flights to London Heathrow per day from 1 airline. Shannon is conveniently located just 2.1 mi from Shannon’s city center.

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

    Our cheapest airline available from Shannon, Clare to London Heathrow Airport is Aer Lingus. Our recent data shows that you can find tickets from as low as $121 on this airline. Additional options worth looking into are British Airways and United Airlines, starting at $270 and $13,349 round-trip. Aer Lingus is priced at 24% lower than the current average price of a flight leaving 3 months from now.

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

    One-way options have recently been found by users for as low as $1,132 on JetBlue. Other airlines that offer cheap prices include Aer Lingus from $1,898 and Lufthansa from $3,343 one-way.

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

    Before booking your flight to London Heathrow Airport from Shannon, Clare, check out the most reliable airlines to get you to your destination on time: Qatar Airways (84%), Aer Lingus (84%), British Airways( 84%).

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

    Looking for the cheapest flight from Shannon, Clare to London Heathrow Airport? While on average our users pay $717, our data indicates the cheapest price to be $55. The most popular route (Shannon - London Heathrow), is priced around $238.

  • 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 vacation 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, November is the cheapest month in which you can book a flight from Shannon, Clare to London Heathrow Airport (average of $661). Flying from Shannon, Clare to London Heathrow Airport in June is currently the most expensive (average of $1,115). 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

Traveling to a place near Shannon?

Book flights to Shannon if you plan to visit one of these locations
Hounslow
Hayes
Thornton Heath
Luton
Wembley
Harrow
Horley
Canterbury
Gatwick
Dover
Orpington
Watford
Milton Keynes
Northampton
Stratford-upon-Avon
Croydon
Borehamwood
Bromley
Folkestone
Ilford

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Alternative routes for Shannon to Heathrow

See prices for flight routes from nearby airports that may be better suited for you.
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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 2,558,603 searches. Data last updated March 25, 2025.
AirlineCheapestAverageFlexibilityOn-time
Aer LingusCheapest$97Average$153FlexibilityNo cancel feeOn-timeN/A
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