$64+ Cheap flights from Heathrow (LHR) to Shannon (SNN)
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 10/6. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — SNN
Oct 25 — Nov 11
Round-trip
1 adult, Economy
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Find cheap flights from Heathrow to Shannon with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheapflights Tip: The best prices from London Heathrow to Shannon are usually found in February or March, booked 62 days in advance, depart on a Friday or Saturday and return on a Tuesday
Cheap flight deals from Heathrow to Shannon
Cheapest
Best
Last-minute
One-way
Cheapest flights from Heathrow to ShannonExplore the most affordable flight options available from Heathrow to Shannon. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 25, 2026.
Explore the most affordable flight options available from Heathrow to Shannon. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 25, 2026.
This Mytrip deal was found by Cheapflights users on 9/21. 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.
Sat 10/109:50 am -
Nonstop1h 30m
Wed 10/214:50 pm -
Nonstop1h 30m
Deal found 9/21![Aer Lingus logo]()
$118
This Mytrip deal was found by Cheapflights users on 9/21. 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.
Thu 11/53:15 pm -
Nonstop1h 30m
Thu 11/127:50 am -
Nonstop1h 25m
Deal found 9/21![Aer Lingus logo]()
$121
This Mytrip deal was found by Cheapflights users on 9/24. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/119:50 am -
Nonstop1h 30m
Thu 10/229:15 pm -
Nonstop1h 25m
Deal found 9/24![Aer Lingus logo]()
$122
This Mytrip deal was found by Cheapflights users on 9/23. 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.
Wed 10/217:10 pm -
Nonstop1h 25m
Wed 10/285:30 pm -
Nonstop1h 25m
Deal found 9/23![Aer Lingus logo]()
$123
This Mytrip deal was found by Cheapflights users on 9/21. 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.
Tue 10/209:50 am -
Nonstop1h 30m
Tue 10/278:05 pm -
Nonstop1h 20m
Deal found 9/21![Aer Lingus logo]()
$124
This Mytrip deal was found by Cheapflights users on 9/21. 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 11/66:05 pm -
Nonstop1h 20m
Mon 11/95:30 pm -
Nonstop1h 25m
Deal found 9/21![Aer Lingus logo]()
$125
This Booking.com deal was found by Cheapflights users on 9/23. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/97:10 pm -
Nonstop1h 25m
Thu 10/159:15 pm -
Nonstop1h 25m
Deal found 9/23![Aer Lingus logo]()
$126
This Booking.com deal was found by Cheapflights users on 9/21. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/72:40 pm -
Nonstop1h 30m
Tue 10/139:15 pm -
Nonstop1h 25m
Deal found 9/21![Aer Lingus logo]()
$127
This Mytrip deal was found by Cheapflights users on 9/21. 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.
Tue 10/132:40 pm -
Nonstop1h 30m
Wed 10/144:50 pm -
Nonstop1h 30m
Deal found 9/21![Aer Lingus logo]()
$128
This Mytrip deal was found by Cheapflights users on 9/24. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/129:50 am -
Nonstop1h 30m
Wed 10/144:50 pm -
Nonstop1h 30m
Deal found 9/24![Aer Lingus logo]()
$129
This Mytrip deal was found by Cheapflights users on 9/20. 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.
Tue 10/132:40 pm -
Nonstop1h 30m
Sat 10/315:10 pm -
Nonstop1h 25m
Deal found 9/20![Aer Lingus logo]()
$131
This Expedia deal was found by Cheapflights users on 9/22. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/72:15 pm -
Nonstop1h 30m
Mon 11/98:05 pm -
Nonstop1h 20m
Deal found 9/22![Aer Lingus logo]()
$135
Best flights from Heathrow to ShannonDiscover carefully curated flight deals from Heathrow to Shannon that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 25, 2026.
Discover carefully curated flight deals from Heathrow to Shannon that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 25, 2026.
This FlightHub deal was found by Cheapflights users on 9/25. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/243:15 pm -
Nonstop1h 30m
Sun 12/278:05 pm -
Nonstop1h 20m
Deal found 9/25![Multiple Airlines logo]()
$244
This British Airways deal was found by Cheapflights users on 9/24. 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.
Wed 12/210:00 am -
Nonstop1h 30m
Sun 12/68:05 pm -
Nonstop1h 20m
Deal found 9/24![British Airways logo]()
$296
This British Airways deal was found by Cheapflights users on 9/25. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/123:15 pm -
Nonstop1h 30m
Mon 11/165:30 pm -
Nonstop1h 25m
Deal found 9/25![British Airways logo]()
$296
This British Airways deal was found by Cheapflights users on 9/24. 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.
Sat 12/52:15 pm -
Nonstop1h 30m
Sun 12/65:30 pm -
Nonstop1h 25m
Deal found 9/24![British Airways logo]()
$296
This British Airways deal was found by Cheapflights users on 9/23. 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.
Fri 10/167:10 pm -
Nonstop1h 25m
Mon 10/199:15 pm -
Nonstop1h 25m
Deal found 9/23![British Airways logo]()
$298
This British Airways deal was found by Cheapflights users on 9/21. 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.
Fri 10/167:10 pm -
Nonstop1h 25m
Sun 10/187:30 am -
Nonstop1h 35m
Deal found 9/21![British Airways logo]()
$298
This British Airways deal was found by Cheapflights users on 9/20. 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.
Fri 10/92:40 pm -
Nonstop1h 30m
Mon 10/129:15 pm -
Nonstop1h 25m
Deal found 9/20![British Airways logo]()
$298
This British Airways deal was found by Cheapflights users on 9/25. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/1810:00 am -
Nonstop1h 30m
Tue 2/237:50 am -
Nonstop1h 25m
Deal found 9/25![British Airways logo]()
$299
This British Airways deal was found by Cheapflights users on 9/20. 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 11/1410:00 am -
Nonstop1h 30m
Mon 11/168:05 pm -
Nonstop1h 20m
Deal found 9/20![British Airways logo]()
$300
Last-minute flights from Heathrow to ShannonDiscover last-minute flight deals from Heathrow to Shannon. Data last updated September 25, 2026 and is based on user searches.
Discover last-minute flight deals from Heathrow to Shannon. Data last updated September 25, 2026 and is based on user searches.
This Booking.com deal was found by Cheapflights users on 9/21. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/72:40 pm -
Nonstop1h 30m
Tue 10/139:15 pm -
Nonstop1h 25m
Deal found 9/21![Aer Lingus logo]()
$127
This FlightHub deal was found by Cheapflights users on 9/23. 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 10/79:50 am -
Nonstop1h 30m
Sat 10/104:50 pm -
Nonstop1h 30m
Deal found 9/23![Aer Lingus logo]()
$137
This Booking.com deal was found by Cheapflights users on 9/23. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/97:10 pm -
Nonstop1h 25m
Thu 10/159:15 pm -
Nonstop1h 25m
Deal found 9/23![Aer Lingus logo]()
$126
This Mytrip deal was found by Cheapflights users on 9/21. 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.
Sat 10/109:50 am -
Nonstop1h 30m
Wed 10/214:50 pm -
Nonstop1h 30m
Deal found 9/21![Aer Lingus logo]()
$118
This Mytrip deal was found by Cheapflights users on 9/23. 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.
Sat 10/102:20 pm -
Nonstop1h 30m
Sat 10/244:50 pm -
Nonstop1h 30m
Deal found 9/23![Aer Lingus logo]()
$136
This Mytrip deal was found by Cheapflights users on 9/24. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/119:50 am -
Nonstop1h 30m
Thu 10/229:15 pm -
Nonstop1h 25m
Deal found 9/24![Aer Lingus logo]()
$122
This Mytrip deal was found by Cheapflights users on 9/24. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/129:50 am -
Nonstop1h 30m
Wed 10/144:50 pm -
Nonstop1h 30m
Deal found 9/24![Aer Lingus logo]()
$129
This Mytrip deal was found by Cheapflights users on 9/21. 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.
Tue 10/132:40 pm -
Nonstop1h 30m
Wed 10/144:50 pm -
Nonstop1h 30m
Deal found 9/21![Aer Lingus logo]()
$128
This Mytrip deal was found by Cheapflights users on 9/20. 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.
Tue 10/132:40 pm -
Nonstop1h 30m
Sat 10/315:10 pm -
Nonstop1h 25m
Deal found 9/20![Aer Lingus logo]()
$131
This Mytrip deal was found by Cheapflights users on 9/21. 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.
Tue 10/209:50 am -
Nonstop1h 30m
Tue 10/278:05 pm -
Nonstop1h 20m
Deal found 9/21![Aer Lingus logo]()
$124
This Mytrip deal was found by Cheapflights users on 9/23. 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.
Wed 10/217:10 pm -
Nonstop1h 25m
Wed 10/285:30 pm -
Nonstop1h 25m
Deal found 9/23![Aer Lingus logo]()
$123
One-way flights from Heathrow to ShannonSearch for one-way flight options from Heathrow to Shannon. Find affordable one-way fares based on user searches. Data last updated September 25, 2026.
Search for one-way flight options from Heathrow to Shannon. Find affordable one-way fares based on user searches. Data last updated September 25, 2026.
This Booking.com deal was found by Cheapflights users on 9/23. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/69:50 am -
Nonstop1h 30m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/23![Aer Lingus logo]()
$64
This Booking.com deal was found by Cheapflights users on 9/23. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/302:40 pm -
Nonstop1h 30m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/23![Aer Lingus logo]()
$66
This Mytrip deal was found by Cheapflights users on 9/20. 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.
Tue 10/132:40 pm -
Nonstop1h 30m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/20![Aer Lingus logo]()
$67
This Kiwi.com deal was found by Cheapflights users on 9/22. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/197:10 pm -
Nonstop1h 25m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/22![Aer Lingus logo]()
$68
This Justfly.com deal was found by Cheapflights users on 9/23. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/57:10 pm -
Nonstop1h 25m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/23![Aer Lingus logo]()
$69
This Mytrip deal was found by Cheapflights users on 9/23. 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.
Sun 10/256:05 pm -
Nonstop1h 20m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/23![Aer Lingus logo]()
$95
This Mytrip deal was found by Cheapflights users on 9/22. 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.
Thu 10/296:05 pm -
Nonstop1h 20m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/22![Aer Lingus logo]()
$97
This FlightHub deal was found by Cheapflights users on 9/21. 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.
Thu 10/157:10 pm -
Nonstop1h 25m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/21![Aer Lingus logo]()
$103
Find flight deals from Heathrow to Shannon
Discover tips and strategies to find the most affordable flight options for your journey from Heathrow (LHR) to Shannon (SNN). 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 September 25, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $118 (Mytrip) |
One-way from | $64 (Booking.com) |
Popular in | December |
Cheapest in | February |
Average price | $186 |
Good round-trip deal | $211 or less |
Good one-way deal | $100 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Heathrow to Shannon 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 7,457,451 searches. Data last updated September 25, 2026.
Use the filters below to find and compare flights from London Heathrow Airport to Shannon that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
LondonShannon
LHR London Heathrow - SNN Shannon
LHRSNN
London Heathrow
Tue 10/6
9:50 am-11:20 am
Nonstop1h 30m
Shannon
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$64
LondonShannon
LHR London Heathrow - SNN Shannon
LHRSNN
London Heathrow
Thu 11/26
3:15 pm-4:45 pm
Nonstop1h 30m
Shannon
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$66
LondonShannon
LHR London Heathrow - SNN Shannon
LHRSNN
London Heathrow
Sun 10/11
9:50 am-11:20 am
Nonstop1h 30m
Shannon
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$69
Quickest round-trip
LondonShannon
LHR London Heathrow - SNN Shannon
LHRSNN
London Heathrow
Sun 10/25
6:05 pm-7:25 pm
Nonstop1h 20m
Shannon
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$95
LondonShannon
LHR London Heathrow - SNN Shannon
LHRSNN
London Heathrow
Mon 10/5
9:50 am-11:20 am
Nonstop1h 30m
Shannon
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$162
LondonShannon
LHR London Heathrow - SNN Shannon
LHRSNN
London Heathrow
Sun 10/11
9:50 am-11:20 am
Nonstop1h 30m
Shannon
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$162
LondonShannon
LHR London Heathrow - SNN Shannon
LHRSNN
London Heathrow
Tue 10/13
2:40 pm-4:10 pm
Nonstop1h 30m
Shannon
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$162
LondonShannon
LHR London Heathrow - SNN Shannon
LHRSNN
London Heathrow
Thu 10/15
9:50 am-11:20 am
Nonstop1h 30m
Shannon
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$163
LondonShannon
LHR London Heathrow - SNN Shannon
LHRSNN
London Heathrow
Fri 10/16
7:10 pm-8:35 pm
Nonstop1h 25m
Shannon
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$163
LondonShannon
LHR London Heathrow - SNN Shannon
LHRSNN
London Heathrow
Wed 10/14
7:10 pm-8:35 pm
Nonstop1h 25m
Shannon
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$163
Showing 1-10 of 19 resultsSorted by cheapest first
- Most accurate provider: When it comes to deals on London Heathrow Airport-Shannon, Clare flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on London Heathrow Airport-Shannon, Clare flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from London Heathrow Airport-Shannon, Clare flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on London Heathrow Airport-Shannon, Clare 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 London Heathrow Airport-Shannon, Clare 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 Heathrow to Shannon
Have a flexible travel schedule? Discover the best time to fly to Shannon from Heathrow with our price prediction graph.
LHR-SNN
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 London Heathrow Airport to Shannon
Prices
Airlines
How far ahead should I book a flight from London Heathrow Airport to Shannon, Clare?
The best time to book flights from London Heathrow Airport to Shannon, Clare is 61 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.
What is the cheapest month to book a flight from London Heathrow Airport to Shannon, Clare?
Currently, February is the cheapest month in which you can book a flight from London Heathrow Airport to Shannon, Clare (average of $159). Flying from London Heathrow Airport to Shannon, Clare in December is currently the most expensive (average of $224). 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 LHR to SNN?
Find hourly flight availability from Heathrow to Shannon. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 25, 2026.
A simple way to save on the total cost of your ticket is to fly from London Heathrow Airport to Shannon, Clare in the afternoon. If you’re flexible enough to do this you can expect to save up to 57% on your trip compared to booking a flight in the morning.
Reviews of airlines servicing Shannon
Get insights into the airlines that provide service to Shannon. 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 Shannon. Reviews last updated September 25, 2026.
Read through reviews of airlines operating flights from London Heathrow Airport to Shannon, such as Aer Lingus. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Overall
7.3
Boarding
7.4
Comfort
7.2
Food
6.7
Crew
8.1
Entertainment
7.0
Reviews
1 / 20
4.0
OkayAnonymous,Jun 2026
BOS - SNN
Overall
7.3
Boarding
7.4
Comfort
7.2
Food
6.7
Crew
8.1
Entertainment
7.0
Reviews
1 / 20
4.0
OkayAnonymous,Jun 2026
BOS - SNN
Related info for your journey
Find useful and relevant information for your journey from Heathrow to Shannon. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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Shannon flight routes
Alternative routes for Heathrow to Shannon
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Complete your trip
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Heathrow and Shannon flights
Browse other Heathrow and Shannon flight options. Last updated on September 25, 2026.
Other flights from Heathrow
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Other flights to Shannon
Explore flights to Shannon departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on September 25, 2026.
Top airline flying from Heathrow to Shannon
Discover the top airline that operate flights from Heathrow to Shannon. 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 7,457,451 searches. Data last updated September 25, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$134 | Average$224 | FlexibilityNo cancel fee | On-timeN/A |