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$129+ Cheap flights from Shannon (SNN) to Heathrow (LHR)

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 10/16. Fares are subject to change and may not be available on all flights or dates of travel.
SNN — LHR
Jun 12 — Jun 191
Thu 6/12
Thu 6/19
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 June 7, 2025.

Round-trip from

$161
(Aer Lingus)

One-way from

$129
(Kiwi.com)

Popular in

July

Cheapest in

February

Average price

$188

Good round-trip deal

$199 or less

Good one-way deal

$79 or less
From Shannon to London Heathrow
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One-way flight from Shannon to London Heathrow
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Highest demand for flights based on searches. 18% potential increase in price ($35 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($5 potential savings vs. average RT price).
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Average for round-trip flights in June 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 June 7, 2025.

This Mytrip deal was found by Cheapflights users on 6/5. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/253:35 pmSNN - LHR
2 stops28h 45mMultiple Airlines
Sun 7/2710:00 pmLHR - SNN
2 stops17h 40mMultiple Airlines
Deal found 6/5$552
This British Airways deal was found by Cheapflights users on 6/5. 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.
Sat 6/215:30 pmSNN - LHR
Nonstop1h 25mBritish Airways
Sat 6/282:20 pmLHR - SNN
Nonstop1h 30mBritish Airways
Deal found 6/5$979
This FlightHub deal was found by Cheapflights users on 6/7. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/232:40 pmSNN - LHR
1 stop17h 05mAer Lingus
Sat 7/262:20 pmLHR - SNN
Nonstop1h 30mAer Lingus
Deal found 6/7$1,219
This United Airlines deal was found by Cheapflights users on 6/5. 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.
Sun 7/209:30 amSNN - LHR
1 stop22h 50mUnited Airlines
Sun 7/278:30 amLHR - SNN
1 stop23h 00mUnited Airlines
Deal found 6/5$13,672
This Lufthansa deal was found by Cheapflights users on 6/6. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/312:30 pmSNN - LHR
1 stop32h 10mLufthansa
Sun 7/68:00 amLHR - SNN
1 stop26h 15mLufthansa
Deal found 6/6$13,751

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 June 7, 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 7/25

3:35 pm-8:20 pm

2 stops28h 45m

London Heathrow

Sun 7/27

10:00 pm-3:40 pm

2 stops17h 40m

$552

ShannonLondon

SNN - LHR

SNNLHR

Shannon

Sat 6/21

5:30 pm-6:55 pm

Nonstop1h 25m

London Heathrow

Sat 6/28

2:20 pm-3:50 pm

Nonstop1h 30m

$979

ShannonLondon

SNN - LHR

SNNLHR

Shannon

Wed 7/23

2:40 pm-7:45 am

1 stop17h 05m

London Heathrow

Sat 7/26

2:20 pm-3:50 pm

Nonstop1h 30m

$1,219

ShannonLondon

SNN - LHR

SNNLHR

Shannon

Sun 7/20

9:30 am-8:20 am

1 stop22h 50m

London Heathrow

Sun 7/27

8:30 am-7:30 am

1 stop23h 00m

$13,672

ShannonLondon

SNN - LHR

SNNLHR

Shannon

Thu 7/3

12:30 pm-8:40 pm

1 stop32h 10m

London Heathrow

Sun 7/6

8:00 am-10:15 am

1 stop26h 15m

$13,751

ShannonLondon

SNN - LHR

SNNLHR

Shannon

Thu 10/16

7:10 am-2:15 pm

1 stop7h 05m

$129

ShannonLondon

SNN - LHR

SNNLHR

Shannon

Mon 6/16

9:15 pm-10:40 pm

Nonstop1h 25m

$130

ShannonLondon

SNN - LHR

SNNLHR

Shannon

Wed 10/15

1:45 pm-9:30 am

1 stop19h 45m

$849

ShannonLondon

SNN - LHR

SNNLHR

Shannon

Mon 7/21

1:45 pm-6:30 am

1 stop16h 45m

$1,303

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/6

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 $1,104). 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 June 7, 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 80% 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 June 7, 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 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 June 7, 2025.
Get a feel of what it's like to fly with United Airlines, JetBlue and Aer Lingus from Shannon to London by reading reviews from past customers. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
8,778 reviews

Entertainment

7.1

Food

6.6

Comfort

7.3

Boarding

7.7

Crew

8.1

Overall

7.4

Reviews

1 / 20
2.0
Mediocre

Anonymous,Oct 2024

EWR - DEN

Terribly delayed flight, missed ongoing flight, hotel very downmarket Food voucher not accepted in hotel
United Airlines
7.4
Good
8,778 reviews
United Airlines
7.4
Good
8,778 reviews

Entertainment

7.1

Food

6.6

Comfort

7.3

Boarding

7.7

Crew

8.1

Overall

7.4

Reviews

1 / 20
2.0
Mediocre

Anonymous,Oct 2024

EWR - DEN

Terribly delayed flight, missed ongoing flight, hotel very downmarket Food voucher not accepted in hotel
JetBlue
7.3
Good
2,924 reviews
United Airlines
7.4
Good
8,778 reviews

Entertainment

7.1

Food

6.6

Comfort

7.3

Boarding

7.7

Crew

8.1

Overall

7.4

Reviews

1 / 20
2.0
Mediocre

Anonymous,Oct 2024

EWR - DEN

Terribly delayed flight, missed ongoing flight, hotel very downmarket Food voucher not accepted in hotel
Aer Lingus
7.1
Good
1,111 reviews
United Airlines
7.4
Good
8,778 reviews

Entertainment

7.1

Food

6.6

Comfort

7.3

Boarding

7.7

Crew

8.1

Overall

7.4

Reviews

1 / 20
2.0
Mediocre

Anonymous,Oct 2024

EWR - DEN

Terribly delayed flight, missed ongoing flight, hotel very downmarket Food voucher not accepted in hotel
Lufthansa
6.7
Okay
7,128 reviews
United Airlines
7.4
Good
8,778 reviews

Entertainment

7.1

Food

6.6

Comfort

7.3

Boarding

7.7

Crew

8.1

Overall

7.4

Reviews

1 / 20
2.0
Mediocre

Anonymous,Oct 2024

EWR - DEN

Terribly delayed flight, missed ongoing flight, hotel very downmarket Food voucher not accepted in hotel
British Airways
6.6
Okay
6,993 reviews
United Airlines
7.4
Good
8,778 reviews

Entertainment

7.1

Food

6.6

Comfort

7.3

Boarding

7.7

Crew

8.1

Overall

7.4

Reviews

1 / 20
2.0
Mediocre

Anonymous,Oct 2024

EWR - DEN

Terribly delayed flight, missed ongoing flight, hotel very downmarket Food voucher not accepted in hotel

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 $161 on this airline. Additional options worth looking into are British Airways and United Airlines, starting at $285 and $13,672 round-trip. Aer Lingus is priced at 1% 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 $130 on British Airways. Other airlines that offer cheap prices include Aer Lingus from $849 and JetBlue from $1,303 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: Air Canada (90%), Aer Lingus (85%), British Airways( 85%).

  • 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 $658, our data indicates the cheapest price to be $63. 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 $1,104). 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
Hayes
Hounslow
Thornton Heath
Luton
Canterbury
Harrow
Dover
Stratford-upon-Avon
Gatwick
Orpington
Watford
Northampton
Croydon
Folkestone
Wembley
Borehamwood
Broadway
Sutton
Aylesbury
Chelmsford

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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.
Dublin to Heathrow flights
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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 June 7, 2025.
AirlineCheapestAverageFlexibilityOn-time
Aer LingusCheapest$97Average$159FlexibilityNo cancel feeOn-timeN/A

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