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Cheap flights from Shannon to London Heathrow Airport from £44

SNN — LHR
19 Sep — 26 Sep1
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

Wed 30/921:15 -
Nonstop1h 25m
Wed 7/1014:40 -
Nonstop1h 30m
Deal found 16/8£91
Tue 8/907:30 -
Nonstop1h 35m
Wed 16/914:40 -
Nonstop1h 30m
Deal found 19/8£93
Fri 2/1021:15 -
Nonstop1h 25m
Fri 9/1019:10 -
Nonstop1h 25m
Deal found 18/8£94
Fri 25/921:15 -
Nonstop1h 25m
Mon 28/914:40 -
Nonstop1h 30m
Deal found 16/8£95
Thu 3/921:15 -
Nonstop1h 25m
Mon 7/919:10 -
Nonstop1h 25m
Deal found 16/8£96
Thu 27/821:15 -
Nonstop1h 25m
Mon 31/819:10 -
Nonstop1h 25m
Deal found 20/8£96
Thu 3/916:50 -
Nonstop1h 30m
Sun 6/909:50 -
Nonstop1h 30m
Deal found 17/8£100
Tue 1/921:15 -
Nonstop1h 25m
Tue 8/914:40 -
Nonstop1h 30m
Deal found 18/8£101
Sat 19/916:50 -
Nonstop1h 30m
Mon 28/919:10 -
Nonstop1h 25m
Deal found 19/8£102

Find flight deals from Shannon to Heathrow

Round-trip from

£91

One-way from

£44

Popular in

June

Cheapest in

August

Average price

£108

Good round-trip deal

£128 or less

Good one-way deal

£60 or less
Aer Lingus
  • Aer Lingus
  • 30/9-7/10
  • Nonstop
  • 2h 55m total
  • Shannon to London
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Aer Lingus
  • Aer Lingus
  • 24/9
  • Nonstop
  • 1h 25m total
  • Shannon to London
Search Deals
Highest demand for flights based on searches. 10% potential increase in price (£11 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 August 2026
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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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Cheapflights Fare Finder

 
Use the filters below to find and compare flights from Shannon to London Heathrow Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

ShannonLondon

SNN Shannon - LHR London Heathrow

SNNLHR

Shannon

Fri 25/9

21:15-22:40

Nonstop1h 25m

London Heathrow

Mon 28/9

14:40-16:10

Nonstop1h 30m

£96

ShannonLondon

SNN Shannon - LHR London Heathrow

SNNLHR

Shannon

Fri 4/12

17:30-18:55

Nonstop1h 25m

London Heathrow

Sat 5/12

10:00-11:30

Nonstop1h 30m

£217

ShannonLondon

SNN Shannon - LHR London Heathrow

SNNLHR

Shannon

Sat 5/9

07:30-09:05

Nonstop1h 35m

London Heathrow

Sun 6/9

19:10-20:35

Nonstop1h 25m

£218

ShannonLondon

SNN Shannon - LHR London Heathrow

SNNLHR

Shannon

Sat 5/9

12:00-20:45

2 stops8h 45m

London Heathrow

Wed 9/9

19:10-20:35

Nonstop1h 25m

£273

ShannonLondon

SNN Shannon - LHR London Heathrow

SNNLHR

Shannon

Tue 15/9

07:30-09:05

Nonstop1h 35m

London Heathrow

Thu 17/9

21:10-12:20

3 stops15h 10m

£290

ShannonLondon

SNN Shannon - LHR London Heathrow

SNNLHR

Shannon

Wed 2/9

08:15-21:35

2 stops13h 20m

London Heathrow

Thu 3/9

19:30-20:25

2 stops24h 55m

£343

ShannonLondon

SNN Shannon - LHR London Heathrow

SNNLHR

Shannon

Mon 31/8

07:30-09:05

Nonstop1h 35m

London Heathrow

Fri 4/9

14:40-16:10

Nonstop1h 30m

£707

ShannonLondon

SNN Shannon - LHR London Heathrow

SNNLHR

Shannon

Thu 1/10

07:30-09:05

Nonstop1h 35m

London Heathrow

Sun 4/10

09:50-11:20

Nonstop1h 30m

£710
Fastest return journey

ShannonLondon

SNN Shannon - LHR London Heathrow

SNNLHR

Shannon

Wed 2/9

21:15-22:40

Nonstop1h 25m

London Heathrow

Sun 6/9

19:10-20:35

Nonstop1h 25m

£711

ShannonLondon

SNN Shannon - LHR London Heathrow

SNNLHR

Shannon

Tue 1/9

16:50-18:20

Nonstop1h 30m

London Heathrow

Sat 5/9

09:50-11:20

Nonstop1h 30m

£711

Flights are sorted by cheapest return flights first.

Deals found on 15/8

Showing 1-10 of 14 resultsSorted by cheapest first
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

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, August is the cheapest month in which you can book a flight from Shannon, Clare to London Heathrow Airport (average of £108). Flying from Shannon, Clare to London Heathrow Airport in June is currently the most expensive (average of £158). 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?

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.

How much does it cost for a return flight from Shannon, Clare to London Heathrow Airport?

Airfare is below average for this route at the moment.

Shannon, Clare to London Heathrow Airport flights typically cost between £93 and £158 in September.
The cheapest return price found within the last 5 days was £91 on Aer Lingus (30 Sept–7 Oct).

Reviews of airlines servicing Heathrow

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
7.3
Good
1,711 reviews
Check prices

Crew

8.1

Overall

7.3

Comfort

7.2

Entertainment

7.0

Boarding

7.5

Food

6.7

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
7.3
Good
1,711 reviews
Aer Lingus
7.3
Good
1,711 reviews
Check prices

Crew

8.1

Overall

7.3

Comfort

7.2

Entertainment

7.0

Boarding

7.5

Food

6.7

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

  • 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 and British Airways can get you from Shannon, Clare to London Heathrow Airport in just under 1h 20m. 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 (£88), offers the cheapest pricing from Shannon, Clare to London Heathrow Airport. This flight start at 32% 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 (97%), American Airlines (95%) and Qatar Airways (94%).

  • 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 £669, our data shows the cheapest flight currently is £45. When looking at the most popular route, (Shannon - London Heathrow), you can expect to pay £93 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, August is the cheapest month in which you can book a flight from Shannon, Clare to London Heathrow Airport (average of £108). Flying from Shannon, Clare to London Heathrow Airport in June is currently the most expensive (average of £158). 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
Hounslow
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Wembley
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Hayes
Croydon
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Eastbourne
Brentford
Northampton
Southend-on-Sea
Barnet
Enfield
Swindon
Kingston upon Thames
Southall
Salisbury

Browse thousands of different options on Cheapflights for your next trip

Top airline flying from Shannon to Heathrow

AirlineCheapestAverageFlexibilityOn-time
Aer LingusCheapest£88Average£133FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights

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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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