When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 61 days in advance, which can save you up to 65% on flights from Portland to Shannon compared to booking the week you need them. Waiting 61 days out may not be for everyone, so we have options available for flights within the next two weeks, with the lowest price starting at $797. For sooner than that we have options available in the next 3 days from $997.
Due to multiple factors, expect to potentially pay more when booking in December. For low rates, February can be a great choice for travel to Shannon. Flights to Shannon from Portland in February are about $619 on average during February, but can be found for as low as $415.
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Portland to Shannon as you normally would.