$478 Find Cheap Flights from Portland to Shannon - Compare and Save

Two cabin classes are available on flights from Portland to Shannon:

• Economy Class
• First Class

A nonstop flight from Portland to Shannon takes 00m, covering 4,595 miles.

Yes, a valid passport is required for this international route. Many destinations require at least six months of validity beyond your travel dates. Check your passport expiry well before booking.

Round-trip flights from Portland to Shannon range from $630 to $1,061, with an average of $822 over the past 12 months. Anything below $630 counts as a good deal.

Yes. Based on fares seen in the past 5 days, round-trip prices on this route showed a wide range, from about $923 to $2,500. That means the highest observed fare was about 3x higher than the lowest one.

One-way fares from Portland to Shannon are currently higher than usual. Average one-way flight prices are about $510, which is 36% above the typical average for this route.

Shannon Airport (SNN) hosts 5 major car rental companies, with daily rates starting from around $4 for economy cars. Top options include:

• Budget
• Sixt
• Europcar
• Thrifty
• Easirent

Flights from Portland to Shannon usually depart from Portland (PDX) and arrive at Shannon (SNN).

One-stop flights from Portland to Shannon most commonly connect through:

• Chicago O'Hare Intl (ORD) - 42% of one-stop connections
• New York John F Kennedy Intl (JFK) - 23% of one-stop connections
• London Heathrow (LHR) - 23% of one-stop connections
• Newark (EWR) - 9% of one-stop connections

Yes. Flexible dates can save you up to 45% on flights from Portland to Shannon. Wednesday is the cheapest departure day at $608 round-trip on average, while Thursday is the most expensive at $1,104, a difference of $496.

KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

Flying via Chicago O'Hare Intl (ORD) gives the shortest average 1-stop total travel time at 14h 03m, compared with 15h 16m via Boston Logan Intl (BOS) and 15h 20m via London Heathrow (LHR).

Shannon is 8 hours ahead of Portland (Irish Time vs Pacific Time). Plan for the time shift when scheduling connections or first-day activities.

The public transport available from SNN airport to Shannon city center is the 343 bus, which takes around seven minutes to get you to town. The bus departs every 30 minutes and offers daily services. However, if you need a quick journey, you can take a taxi or a town car to arrive in the city in approximately five minutes.

Most airlines have special amenities for their first-class passengers. If flying with British Airways, you enjoy comfortable and spacious seats, a cotton duvet, a pillow, and a quilted mattress on your 12-hour flight. If flying with Aer Lingus, you can enjoy lie-flat seats, magazines, and dental kits. However, your airline sends you an email after booking so you know what to expect during your flight.

If you prefer a more eco-friendly journey when booking cheap flights from Portland to Shannon, choose Aer Lingus. These airlines use sustainable aviation fuel (SAF) and aim to achieve zero carbon emissions by 2050. You can also use British Airways, which creates a better sustainable future through Project Speedbird, to reduce carbon emissions.

Some airlines give you an allowance for upgrading your class of ticket when flying from Portland to Shannon. Mostly, your airline sends you an email after you book to offer the opportunity to upgrade, especially if first-class seats are available. This is a great opportunity because the journey from Portland to Shannon is longer, and comfortable first-class seats give you a smooth travel experience.