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Shannon

$470+ Cheap flights from Portland (PDX) 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 4/26. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — SNN
Jan 14 — Jan 211
Wed 1/14
Wed 1/21
1 adult, Economy
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Cheap flight deals from Portland to Shannon

Cheapest flights from Portland to Shannon
Explore the most affordable flight options available from Portland to Shannon. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 15, 2025.

This oojo deal was found by Cheapflights users on 12/15. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/151:28 pmPDX - SNN
2 stops21h 57mBritish Airways
Mon 12/228:05 pmSNN - PDX
2 stops34h 54mBritish Airways
Deal found 12/15$997
This Air Canada deal was found by Cheapflights users on 12/15. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/153:15 pmPDX - SNN
2 stops17h 30mAir Canada
Mon 12/227:50 amSNN - PDX
3 stops22h 50mAir Canada
Deal found 12/15$1,319
This American Airlines deal was found by Cheapflights users on 12/15. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/155:45 pmPDX - SNN
1 stop15h 00mAmerican Airlines
Mon 12/227:50 amSNN - PDX
1 stop16h 05mAmerican Airlines
Deal found 12/15$1,934

Find flight deals from Portland to Shannon

Discover tips and strategies to find the most affordable flight options for your journey from Portland (PDX) 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 December 15, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

Expedia
3 stars

Round-trip from

$470
(American Airlines)
Provider with most accurate pricing for Portland-Shannon flight deals.
Search Deals
Provider most trusted by Cheapflights users for Portland-Shannon flights.
Search Deals
From Portland to Shannon
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Portland 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 2,558,603 searches. Data last updated December 15, 2025.
Use the filters below to find and compare flights from Portland to Shannon that are best for you.

Fly from

Portland

Fly to

Shannon

Route

Depart

Return

Price

PortlandShannon

PDX - SNN

PDXSNN

Portland

Sun 4/26

7:30 pm-8:35 pm

1 stop17h 05m

Shannon

Wed 5/6

7:40 am-5:40 pm

1 stop18h 00m

$470

PortlandShannon

PDX - SNN

PDXSNN

Portland

Thu 3/5

6:43 am-11:30 am

2 stops20h 47m

Shannon

Wed 3/11

7:50 am-4:55 pm

1 stop16h 05m

$474

PortlandShannon

PDX - SNN

PDXSNN

Portland

Mon 4/20

7:30 pm-4:10 pm

1 stop12h 40m

Shannon

Sat 5/16

7:40 am-11:37 pm

2 stops23h 57m

$570

PortlandShannon

PDX - SNN

PDXSNN

Portland

Thu 4/30

3:15 pm-8:35 pm

2 stops21h 20m

Shannon

Thu 5/14

10:55 am-12:48 am

2 stops21h 53m

$592

PortlandShannon

PDX - SNN

PDXSNN

Portland

Thu 4/30

5:15 am-10:15 am

2 stops21h 00m

Shannon

Thu 5/14

12:30 pm-9:16 pm

1 stop16h 46m

$597

PortlandShannon

PDX - SNN

PDXSNN

Portland

Mon 3/16

6:45 pm-4:45 pm

1 stop15h 00m

$486

PortlandShannon

PDX - SNN

PDXSNN

Portland

Sat 12/20

5:39 pm-10:20 am

3 stops56h 41m

$930

PortlandShannon

PDX - SNN

PDXSNN

Portland

Sat 12/20

7:00 pm-4:45 pm

2 stops37h 45m

$1,174

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/14

Compare providers for flights from Portland to Shannon

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Portland to Shannon in December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Portland-Shannon, Clare flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Portland-Shannon, Clare flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Portland-Shannon, Clare flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Portland-Shannon, Clare flights, Cheapflights users trust Expedia the most. Expedia 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 Portland-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 Portland to Shannon

Have a flexible travel schedule? Discover the best time to fly to Shannon from Portland with our price prediction graph.
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 Portland to Shannon

What is the cheapest time of day to fly from PDX to SNN?

Find hourly flight availability from Portland 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 December 15, 2025.

It’s optimal to fly from Portland to Shannon, Clare at noon. By choosing this option you can save up to 39% on the cost of your flight, compared to a flight in the evening.

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 December 15, 2025.
Get a feel of what it's like to fly with Delta, United Airlines, and American Airlines from Portland to Shannon by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
8,010 reviews

Crew

8.5

Overall

7.9

Comfort

7.9

Entertainment

7.9

Food

7.3

Boarding

8.1

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Delta
7.9
Good
8,010 reviews
Delta
7.9
Good
8,010 reviews

Crew

8.5

Overall

7.9

Comfort

7.9

Entertainment

7.9

Food

7.3

Boarding

8.1

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
United Airlines
7.4
Good
9,095 reviews
Delta
7.9
Good
8,010 reviews

Crew

8.5

Overall

7.9

Comfort

7.9

Entertainment

7.9

Food

7.3

Boarding

8.1

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
American Airlines
7.2
Good
11,048 reviews
Delta
7.9
Good
8,010 reviews

Crew

8.5

Overall

7.9

Comfort

7.9

Entertainment

7.9

Food

7.3

Boarding

8.1

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Aer Lingus
7.2
Good
1,392 reviews
Delta
7.9
Good
8,010 reviews

Crew

8.5

Overall

7.9

Comfort

7.9

Entertainment

7.9

Food

7.3

Boarding

8.1

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.

Related info for your journey

Find useful and relevant information for your journey from Portland to Shannon. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Portland to Shannon, Clare?

    A quick flight from Portland to Shannon, Clare can take about 17h 05m. American Airlines provides one of the quickest options available for as low as $470. Portland and Shannon, Clare are separated by a distance of 4595 mi.

  • What are the cheapest airlines flying from Portland to Shannon, Clare round-trip?

    According to our current data, Delta ($497), United Airlines ($561), and American Airlines ($561) offers the cheapest pricing from Portland to Shannon, Clare.

  • Can I find deals for flights from Portland to Shannon that include hotel bookings?

    Yes. In addition to deals on Portland to Shannon flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Portland to Shannon?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Portland to Shannon.

  • Can I find deals for business class flights from Portland to Shannon?

    Yes. Cheapflights offers flight deals from Portland to Shannon by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

Traveling to a place near Shannon?

Book flights to Shannon if you plan to visit one of these locations
Ennis

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Top 4 airlines flying from Portland to Shannon

Discover the top 4 airlines that operate flights from Portland 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 2,558,603 searches. Data last updated December 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$546Average$855FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$561Average$744FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$561Average$709FlexibilityNo cancel feeOn-time71%
Aer LingusCheapest$717Average$881FlexibilityNo cancel feeOn-timeN/A

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