$291 Cheap Flights from Portland (PDX) to Shannon (SNN)

View $291 flight on Thu, Sep 3, 2026Opens in a new window

Popular airlines from Portland International Airport (PDX) to Shannon Airport (SNN)

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Cheap Flights from Portland to Shannon (PDX-SNN)

Prices were available within the past 7 days and start at $291 for one-way flights and $480 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Tue, Apr 21 - Sat, May 2
PDX
Portland
SNN
Shannon
$480 Roundtrip, found 19 hours ago
$480
Roundtrip
found 19 hours ago
Select United flight, departing Tue, Apr 21 from Portland to Shannon, returning Sat, May 2, priced at $480 found 19 hours ago
United
Wed, Apr 15 - Sat, May 2
PDX
Portland
SNN
Shannon
$481 Roundtrip, found 19 hours ago
$481
Roundtrip
found 19 hours ago
Select United flight, departing Wed, Apr 15 from Portland to Shannon, returning Sat, May 2, priced at $481 found 19 hours ago
United
Tue, Apr 21 - Wed, May 6
PDX
Portland
SNN
Shannon
$485 Roundtrip, found 19 hours ago
$485
Roundtrip
found 19 hours ago
Select United flight, departing Tue, Apr 21 from Portland to Shannon, returning Wed, May 6, priced at $485 found 19 hours ago
United
Wed, Apr 15 - Wed, May 6
PDX
Portland
SNN
Shannon
$486 Roundtrip, found 19 hours ago
$486
Roundtrip
found 19 hours ago
Select United flight, departing Wed, Apr 15 from Portland to Shannon, returning Wed, May 6, priced at $486 found 19 hours ago
Delta
Fri, Sep 4 - Mon, Sep 14
PDX
Portland
SNN
Shannon
$487 Roundtrip, found 2 hours ago
$487
Roundtrip
found 2 hours ago
Select Delta flight, departing Fri, Sep 4 from Portland to Shannon, returning Mon, Sep 14, priced at $487 found 2 hours ago
United
Fri, Apr 24 - Wed, May 13
PDX
Portland
SNN
Shannon
$491 Roundtrip, found 19 hours ago
$491
Roundtrip
found 19 hours ago
Select United flight, departing Fri, Apr 24 from Portland to Shannon, returning Wed, May 13, priced at $491 found 19 hours ago
United
Sat, Apr 4 - Wed, Apr 15
PDX
Portland
SNN
Shannon
$492 Roundtrip, found 19 hours ago
$492
Roundtrip
found 19 hours ago
Select United flight, departing Sat, Apr 4 from Portland to Shannon, returning Wed, Apr 15, priced at $492 found 19 hours ago
KLM
Fri, Sep 4 - Mon, Sep 14
PDX
Portland
SNN
Shannon
$515 Roundtrip, found 2 hours ago
$515
Roundtrip
found 2 hours ago
Select KLM flight, departing Fri, Sep 4 from Portland to Shannon, returning Mon, Sep 14, priced at $515 found 2 hours ago
Lufthansa
Fri, May 8 - Wed, May 13
PDX
Portland
SNN
Shannon
$522 Roundtrip, found 2 days ago
$522
Roundtrip
found 2 days ago
Select Lufthansa flight, departing Fri, May 8 from Portland to Shannon, returning Wed, May 13, priced at $522 found 2 days ago
Air Canada
Tue, Mar 10 - Wed, Mar 18
PDX
Portland
SNN
Shannon
$670 Roundtrip, found 8 hours ago
$670
Roundtrip
found 8 hours ago
Select Air Canada flight, departing Tue, Mar 10 from Portland to Shannon, returning Wed, Mar 18, priced at $670 found 8 hours ago

Alternative airports near Shannon

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Shannon Airport SNN. Cheapest and Closest option available. Average driving time to city center is 7 minutes. Flights from $749
SNN
Shannon Airport
CheapestClosest
Average driving time to city center7 min
Flights from $749

Frequently asked questions

How much does a flight from Portland Intl. Airport (PDX) to Shannon Airport (SNN) cost?
Snag a cheap one-way flight from $291 or cheap return flight from $480 from Portland Intl. Airport (PDX) to Shannon Airport (SNN) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight offers on this route.
What is the cheapest month to fly from Portland Intl. Airport (PDX) to Shannon Airport (SNN)?
April is the cheapest month to fly from PDX to SNN. Timing your trip outside of the busy season is often the key to better flight prices.
What is the cheapest airline that flies from Portland Intl. Airport (PDX) to Shannon Airport (SNN)?
Expedia's filter tool lets you easily compare travel time, airlines and fares all in one place. Customize the search to your preferences, then sort by "Price (lowest to highest)" to find the carrier with the cheapest PDX to SNN flight.
How many flights per day from Portland Intl. Airport (PDX) to Shannon Airport (SNN)?
There are no daily nonstop flights departing from Portland Intl. Airport (PDX) to Shannon Airport (SNN). But you can book flights with layovers. Filter your search results on Expedia to include one or more stops, and you'll be soaring above the clouds in no time.
What day of the week has the most flights from PDX to SNN?
You'll usually find Tuesday the quietest day for flights, while Fridays tend to be the busiest.* However this can vary from season to season and during public holidays or peak travel times.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Portland Intl. Airport (PDX) to Shannon Airport (SNN)?
To touch down at Shannon Airport (SNN) on schedule, opt for a flight that takes off from Portland Intl. Airport (PDX) before 3 PM. The chance of cancellations is 22% higher, on average, for departures after this hour.**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.
Is it cheaper to buy a plane ticket from Portland Intl. Airport (PDX) to Shannon Airport (SNN) last-minute?
Booking your ticket from PDX to SNN right before your trip is generally more expensive. But if there's some wiggle room with your travel dates and times, you could snag a cheap last-minute fare.
Is it cheaper to book a PDX to SNN flight and hotel package?
Booking a PDX to SNN flight and hotel package is typically cheaper than booking separately. With Expedia, you can enjoy the convenience of organizing your trip all in one place. Select from our wide range of hotels and then add activities, flights and car rentals to your booking. Bundle it all together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Portland Intl. Airport (PDX) to Shannon Airport (SNN)?
In most instances, you can cancel or modify your PDX to SNN flight. However, additional fees may apply, especially if you booked more than 24 hours ago. Check your itinerary for the airline's fees and rules on flight changes, or if you need further information, go to our Customer Service portal.

Travel information

Origin airport
Portland Intl.
Destination airport
Shannon
Airlines serving
Aer Lingus, Air Canada, American Airlines, British Airways, Delta, Lufthansa, United
Roundtrip price
$480
Distance
4598 mi

Book with confidence

Portland to Shannon Flights

The cheapest times to fly from Portland to Shannon

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 Portland to Shannon are during the month of April. You can find some of the cheapest flights from Portland to Shannon with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Portland to Shannon

Sunday is one of the best days to book for cheap flights from Portland to Shannon: 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 Portland to Shannon

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 Portland to Shannon in 2026. You can also book with separate airlines for your outbound and return journeys, from $291 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 Portland to Shannon 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 Portland to Shannon 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.

 

Portland to Shannon Flights

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*Available to One Key members.