HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Shannon

$291+ Cheap flights from Portland (PDX) to Shannon (SNN)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/6. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — SNN
Mar 13 — Mar 201
Fri 3/13
Fri 3/20
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Portland to Shannon with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 February 11, 2026.

This Delta deal was found by Cheapflights users on 2/8. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/57:00 am
PDX
-
SNN
1 stop20h 10m
Delta
Sat 9/191:05 pm
SNN
-
PDX
1 stop16h 30m
Delta
Deal found 2/8$489
This United Airlines deal was found by Cheapflights users on 2/7. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/310:55 pm
PDX
-
SNN
2 stops27h 20m
United Airlines
Wed 4/1512:30 pm
SNN
-
PDX
2 stops18h 24m
United Airlines
Deal found 2/7$493
This KAYAK deal was found by Cheapflights users on 2/7. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/811:15 pm
PDX
-
SNN
1 stop27h 00m
Lufthansa
Tue 4/1412:30 pm
SNN
-
PDX
1 stop17h 29m
Lufthansa
Deal found 2/7$543
This United Airlines deal was found by Cheapflights users on 2/8. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/57:44 pm
PDX
-
SNN
2 stops27h 46m
United Airlines
Sat 9/199:30 am
SNN
-
PDX
1 stop22h 22m
United Airlines
Deal found 2/8$566
This KLM deal was found by Cheapflights users on 2/10. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/510:15 am
PDX
-
SNN
2 stops16h 55m
Multiple Airlines
Sat 9/191:05 pm
SNN
-
PDX
1 stop16h 30m
Multiple Airlines
Deal found 2/10$568
This United Airlines deal was found by Cheapflights users on 2/10. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/3111:59 pm
PDX
-
SNN
2 stops23h 31m
United Airlines
Sat 8/159:30 am
SNN
-
PDX
2 stops23h 23m
United Airlines
Deal found 2/10$583
This United Airlines deal was found by Cheapflights users on 2/7. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/88:05 am
PDX
-
SNN
2 stops18h 10m
United Airlines
Wed 4/1512:30 pm
SNN
-
PDX
2 stops20h 14m
United Airlines
Deal found 2/7$593
This United Airlines deal was found by Cheapflights users on 2/7. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/305:00 am
PDX
-
SNN
2 stops21h 15m
United Airlines
Thu 5/1412:30 pm
SNN
-
PDX
1 stop16h 36m
United Airlines
Deal found 2/7$623

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 February 11, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$493
(United Airlines)

One-way from

$291
(United 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
Search Deals
One-way flight from Portland to Shannon
Search Deals

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 February 11, 2026.
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

Fri 4/3

10:55 pm-10:15 am

2 stops27h 20m

Shannon

Wed 4/15

12:30 pm-3:09 pm

3 stops34h 39m

$493

PortlandShannon

PDX - SNN

PDXSNN

Portland

Wed 4/8

11:15 pm-10:15 am

1 stop27h 00m

Shannon

Wed 4/15

12:30 pm-9:59 pm

1 stop17h 29m

$543

PortlandShannon

PDX - SNN

PDXSNN

Portland

Wed 4/8

11:15 pm-10:15 am

1 stop27h 00m

Shannon

Tue 4/14

12:30 pm-9:59 pm

1 stop17h 29m

$543

PortlandShannon

PDX - SNN

PDXSNN

Portland

Mon 8/3

11:30 pm-7:30 am

2 stops24h 00m

Shannon

Sat 8/15

9:30 am-10:13 pm

1 stop20h 43m

$583

PortlandShannon

PDX - SNN

PDXSNN

Portland

Fri 8/7

11:59 pm-7:30 am

2 stops23h 31m

Shannon

Sat 8/15

9:30 am-11:04 pm

2 stops21h 34m

$583

PortlandShannon

PDX - SNN

PDXSNN

Portland

Sun 8/2

11:59 pm-7:30 am

2 stops23h 31m

Shannon

Sat 8/15

9:30 am-9:40 am

2 stops32h 10m

$583

PortlandShannon

PDX - SNN

PDXSNN

Portland

Fri 7/31

11:59 pm-7:30 am

2 stops23h 31m

Shannon

Sat 8/15

9:30 am-12:53 am

2 stops23h 23m

$583

PortlandShannon

PDX - SNN

PDXSNN

Portland

Sat 8/1

11:59 pm-7:30 am

2 stops23h 31m

Shannon

Sat 8/15

9:30 am-11:58 am

2 stops34h 28m

$583

PortlandShannon

PDX - SNN

PDXSNN

Portland

Thu 8/6

11:59 pm-7:30 am

2 stops23h 31m

$291

PortlandShannon

PDX - SNN

PDXSNN

Portland

Fri 8/7

11:00 am-7:30 am

2 stops36h 30m

$297

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/10

Showing 1-10 of 13 results
1
2

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 February.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars

*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 FlightHub the most. FlightHub 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.

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 February 11, 2026.
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
8,179 reviews

Crew

8.5

Boarding

8.1

Comfort

7.9

Overall

7.9

Entertainment

7.8

Food

7.2

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
8,179 reviews
Delta
7.9
Good
8,179 reviews

Crew

8.5

Boarding

8.1

Comfort

7.9

Overall

7.9

Entertainment

7.8

Food

7.2

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
9,276 reviews
Delta
7.9
Good
8,179 reviews

Crew

8.5

Boarding

8.1

Comfort

7.9

Overall

7.9

Entertainment

7.8

Food

7.2

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
11,267 reviews
Delta
7.9
Good
8,179 reviews

Crew

8.5

Boarding

8.1

Comfort

7.9

Overall

7.9

Entertainment

7.8

Food

7.2

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 27h. United Airlines provides one of the quickest options available for as low as $543. Portland and Shannon, Clare are separated by a distance of 4595 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

    According to our current data, American Airlines ($480), Delta ($488), and United 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top 3 airlines flying from Portland to Shannon

Discover the top 3 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 February 11, 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$480Average$709FlexibilityNo cancel feeOn-time71%
DeltaCheapest$488Average$563FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$561Average$741FlexibilityNo cancel feeOn-time69%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.