$64 Cheap Flights from Shannon (SNN) to London (LHR)

View $64 flight on Tue, May 27, 2025Opens in a new window

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Find available prices by choosing your travel dates.

Cheap Flights from Shannon to London (SNN-LHR)

Prices were available within the past 7 days and start at $64 for one-way flights and $112 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Aer Lingus
Thu, May 22 - Mon, May 26
SNN
Shannon
LHR
London
$112 Roundtrip, found 6 days ago
$112
Roundtrip
found 6 days ago
Select Aer Lingus flight, departing Thu, May 22 from Shannon to London, returning Mon, May 26, priced at $112 found 6 days ago
Aer Lingus
Thu, May 1 - Sun, May 4
SNN
Shannon
LHR
London
$113 Roundtrip, found 2 days ago
$113
Roundtrip
found 2 days ago
Select Aer Lingus flight, departing Thu, May 1 from Shannon to London, returning Sun, May 4, priced at $113 found 2 days ago
Aer Lingus
Thu, May 22 - Wed, May 28
SNN
Shannon
LHR
London
$126 Roundtrip, found 1 day ago
$126
Roundtrip
found 1 day ago
Select Aer Lingus flight, departing Thu, May 22 from Shannon to London, returning Wed, May 28, priced at $126 found 1 day ago
Aer Lingus
Mon, Jun 2 - Tue, Jun 3
SNN
Shannon
LHR
London
$126 Roundtrip, just found
$126
Roundtrip
just found
Select Aer Lingus flight, departing Mon, Jun 2 from Shannon to London, returning Tue, Jun 3, priced at $126 just found
Aer Lingus
Thu, May 22 - Sat, May 31
SNN
Shannon
LHR
London
$128 Roundtrip, found 6 days ago
$128
Roundtrip
found 6 days ago
Select Aer Lingus flight, departing Thu, May 22 from Shannon to London, returning Sat, May 31, priced at $128 found 6 days ago
Aer Lingus
Thu, May 1 - Wed, May 7
SNN
Shannon
LHR
London
$135 Roundtrip, found 2 days ago
$135
Roundtrip
found 2 days ago
Select Aer Lingus flight, departing Thu, May 1 from Shannon to London, returning Wed, May 7, priced at $135 found 2 days ago
Aer Lingus
Mon, May 5 - Wed, May 7
SNN
Shannon
LHR
London
$139 Roundtrip, found 3 days ago
$139
Roundtrip
found 3 days ago
Select Aer Lingus flight, departing Mon, May 5 from Shannon to London, returning Wed, May 7, priced at $139 found 3 days ago
Aer Lingus
Fri, May 30 - Sun, Jun 1
SNN
Shannon
LHR
London
$144 Roundtrip, found 6 days ago
$144
Roundtrip
found 6 days ago
Select Aer Lingus flight, departing Fri, May 30 from Shannon to London, returning Sun, Jun 1, priced at $144 found 6 days ago
Aer Lingus
Thu, Jun 19 - Fri, Jun 20
SNN
Shannon
LHR
London
$146 Roundtrip, found 10 hours ago
$146
Roundtrip
found 10 hours ago
Select Aer Lingus flight, departing Thu, Jun 19 from Shannon to London, returning Fri, Jun 20, priced at $146 found 10 hours ago
British Airways
Mon, Jun 2 - Tue, Jun 3
SNN
Shannon
LHR
London
$285 Roundtrip, just found
$285
Roundtrip
just found
Select British Airways flight, departing Mon, Jun 2 from Shannon to London, returning Tue, Jun 3, priced at $285 just found
Flights from Shannon (SNN) to London (LHR)
Origin airport
Shannon
Destination airport
Heathrow
Airlines serving
Aer Lingus, British Airways
Roundtrip price
$111
Distance
369 mi

Shannon to London Flights

The cheapest times to fly from Shannon to London

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Shannon to London are during the month of May. You can find some of the cheapest flights from Shannon to London with Expedia's search tool and vast selection of airlines.

The best time to book a flight from Shannon to London

Sunday is one of the best days to book for cheap flights from Shannon to London: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

How to find cheap round-trip tickets from Shannon to London

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Shannon to London in 2025. You can also book with separate airlines for your outbound and return journeys, from $64 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Shannon to London flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

You could also save big by booking one of Expedia's vacation packages. Bundling together your Shannon to London airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

*Terms apply.

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

Frequently asked questions

How much does a flight from Shannon Airport (SNN) to Heathrow Airport (LHR) cost?
Cheap round-trip flights from Shannon Airport (SNN) to Heathrow Airport (LHR) start at $126. This information is based on the cheapest price found on Expedia for this return journey departing within the next three months. This airfare is for a Aer Lingus flight leaving SNN on May 6 2025 and touching down at LHR. The price was last updated on April 24 2025 and has not changed since.
What is the cheapest month to fly from SNN to LHR?
The cheapest flights from SNN to LHR are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
Which airlines fly direct from Shannon Airport (SNN) to Heathrow Airport (LHR)?
When setting off from Shannon Airport (SNN), you can get on a nonstop flight to Heathrow Airport (LHR) with Aer Lingus.
What is the cheapest airline that flies from SNN to LHR?
Right now, the cheapest carrier operating one-way flights from SNN to LHR is Aer Lingus. You can jet off on this route from $64. This fare is based on the lowest price found on Expedia departing within the next three months. The flight takes off from SNN on May 28 2025. Prices were last updated on April 24 2025 and have not changed since.
How many flights per day from Shannon Airport (SNN) to Heathrow Airport (LHR)?
With, on average, 2 nonstop flights that operate from Shannon Airport (SNN) to Heathrow Airport (LHR) daily, you’ll be taking off on vacation soon enough.
What are the most popular departure times for flights from Shannon Airport (SNN) to Heathrow Airport (LHR)?
Flights between SNN and LHR tend to be busiest at 7 AM. If you’d like a more relaxed trip and possibly cheaper prices, choose a time when demand is lower.
What day of the week has the most flights from SNN to LHR?
Travel on a Friday if you’re searching for the largest selection of flights from Shannon Airport (SNN) to Heathrow Airport (LHR).
What is the earliest flight from Shannon Airport (SNN) to Heathrow Airport (LHR)?
Shannon Airport (SNN)’s first flight to Heathrow Airport (LHR) departs at approximately 7:45AM UTC+0. With a flight time of 1h 30m, you’ll land at around 9:15AM UTC+0.
How long does it take to fly from Shannon Airport (SNN) to Heathrow Airport (LHR)?
The average flight duration from SNN to LHR is 1 hour and 25 minutes, covering a distance of 370 mi.
What airline has the least delays from SNN to LHR?
British Airways has the best track record for on-time direct flights from Shannon Airport (SNN) to Heathrow Airport (LHR), with an on-time rating of 83%. Use the Expedia App to view your flight schedule before you take off and get immediate updates about any trip changes.
What is the best time to fly from Shannon Airport (SNN) to Heathrow Airport (LHR)?
To avoid possible delays on the Shannon Airport (SNN) to Heathrow Airport (LHR) route, travel before 3 PM. Flights after this time have a 22% higher chance of being canceled.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG’s global flight data platform.
What airports do you fly into for London from Shannon Airport (SNN)?
Catch a direct flight from Shannon Airport (SNN) to London and you’ll land at any one of these hubs:

  • Heathrow Airport (LHR)
  • Stansted Airport (STN)
  • Gatwick Airport (LGW)

Is it cheaper to buy a plane ticket from Shannon Airport (SNN) to Heathrow Airport (LHR) last-minute?
Booking your ticket from SNN to LHR right before your trip is typically more expensive. But if there’s some wiggle room with your schedule, you could bag a cheap last-minute fare.
Is it cheaper to book a SNN to LHR flight and hotel package?
You can save money by booking a SNN to LHR flight and hotel package compared to booking separately. In fact, you could save hundreds of dollars by bundling with Expedia. And it’s easy to manage everything in one convenient place. Once you’ve chosen your preferred flights and accommodations, consider other add-ons like activities, car rentals and tours.
Can I cancel or change the date of my flight from Shannon Airport (SNN) to Heathrow Airport (LHR)?
Typically, it’s possible to reschedule or cancel your SNN to LHR flight. However, if the booking was made more than 24 hours ago, additional charges may apply. Check your airline’s policies in your itinerary to see what changes are allowed and whether any costs are involved. You’ll also find more details on our Customer Service portal.

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*Available to One Key members.