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Shannon

$516+ 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 9/11. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — SNN
May 17 — May 241
Sat 5/17
Sat 5/24
1 adult, Economy
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Cheap 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 May 12, 2025.

Most accurate provider

AranGrant
3 stars

Most trusted provider

AranGrant
3 stars

Round-trip from

$516
(United Airlines)

Popular in

June

Cheapest in

November

Average price

$855
Provider with most accurate pricing for Portland-Shannon flight deals.
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Provider most trusted by Cheapflights users for Portland-Shannon flights.
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From Portland to Shannon
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Highest demand for flights based on searches. 15% potential increase in price ($147 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($39 potential savings vs. average RT price).
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Average for round-trip flights in May 2025
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Find 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 May 12, 2025.

This United Airlines deal was found by Cheapflights users on 5/12. 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 9/118:30 amPDX - SNN
1 stop15h 00mUnited Airlines
Wed 9/2412:30 pmSNN - PDX
1 stop17h 07mUnited Airlines
Deal found 5/12$516
This Delta deal was found by Cheapflights users on 5/12. 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.
Wed 5/287:14 amPDX - SNN
1 stop19h 56mDelta
Thu 8/211:05 pmSNN - PDX
1 stop16h 30mDelta
Deal found 5/12$566
This KLM deal was found by Cheapflights users on 5/12. 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.
Thu 5/296:30 amPDX - SNN
2 stops20h 40mMultiple Airlines
Tue 8/261:05 pmSNN - PDX
1 stop16h 30mMultiple Airlines
Deal found 5/12$631
This American Airlines deal was found by Cheapflights users on 5/12. 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.
Thu 7/31:44 pmPDX - SNN
2 stops18h 26mAmerican Airlines
Sun 7/207:40 amSNN - PDX
2 stops22h 26mAmerican Airlines
Deal found 5/12$681
This Air France deal was found by Cheapflights users on 5/12. 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 France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/296:30 amPDX - SNN
2 stops20h 40mAir France
Thu 8/211:05 pmSNN - PDX
2 stops16h 39mAir France
Deal found 5/12$731
This Air Canada deal was found by Cheapflights users on 5/12. 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.
Thu 9/1110:00 amPDX - SNN
2 stops26h 35mAir Canada
Wed 9/247:40 amSNN - PDX
3 stops19h 06mAir Canada
Deal found 5/12$813
This Gurufare deal was found by Cheapflights users on 5/11. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/412:59 amPDX - SNN
2 stops26h 21mBritish Airways
Tue 8/127:40 amSNN - PDX
1 stop17h 55mBritish Airways
Deal found 5/11$816

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 May 12, 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

Thu 9/11

8:30 am-7:30 am

1 stop15h 00m

Shannon

Tue 9/23

9:30 am-6:31 pm

1 stop17h 01m

$516

PortlandShannon

PDX - SNN

PDXSNN

Portland

Mon 7/21

7:00 am-11:10 am

1 stop20h 10m

Shannon

Mon 7/28

1:05 pm-9:30 pm

1 stop16h 25m

$576

PortlandShannon

PDX - SNN

PDXSNN

Portland

Wed 5/28

7:14 am-11:10 am

1 stop19h 56m

Shannon

Thu 8/28

1:05 pm-9:44 pm

2 stops16h 39m

$651

PortlandShannon

PDX - SNN

PDXSNN

Portland

Thu 7/3

1:44 pm-4:10 pm

2 stops18h 26m

Shannon

Sun 7/20

7:40 am-10:06 pm

2 stops22h 26m

$681

PortlandShannon

PDX - SNN

PDXSNN

Portland

Thu 5/29

6:30 am-11:10 am

2 stops20h 40m

Shannon

Thu 8/21

1:05 pm-9:44 pm

2 stops16h 39m

$731

PortlandShannon

PDX - SNN

PDXSNN

Portland

Thu 9/11

10:00 am-8:35 pm

2 stops26h 35m

Shannon

Wed 9/24

7:40 am-6:46 pm

3 stops19h 06m

$813

PortlandShannon

PDX - SNN

PDXSNN

Portland

Mon 8/4

12:59 am-11:20 am

2 stops26h 21m

Shannon

Tue 8/12

7:40 am-5:35 pm

1 stop17h 55m

$816

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/12

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 May.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*2 stars
AranGrantPrice 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 AranGrant to be most consistent on Cheapflights vs. AranGrant Users can find the same prices on Portland-Shannon, Clare flight deals on Cheapflights vs. AranGrant >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 AranGrant the most. AranGrant 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 May 12, 2025.

It’s optimal to fly from Portland to Shannon, Clare at noon. By choosing this option you can save up to 41% on the cost of your flight, compared to a flight in the evening.

Rainfall in Shannon by month

Plan your trip to Shannon by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Shannon, Clare ranges from 2.3 - 4.1 inches per month. October is typically the wettest month, when rainfall can reach 4.1 in. April is typically the driest time to visit Shannon, Clare when rainfall is around 2.3 in.

Temperature in Shannon by month

Plan your trip to Shannon by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Shannon, Clare, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 60.8 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 42.8 F).

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 May 12, 2025.
Delta
8.0
Very good
7,950 reviews

Boarding

8.2

Food

7.3

Overall

8.0

Comfort

7.9

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,950 reviews
Delta
8.0
Very good
7,950 reviews

Boarding

8.2

Food

7.3

Overall

8.0

Comfort

7.9

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Air France
7.5
Good
1,450 reviews
Delta
8.0
Very good
7,950 reviews

Boarding

8.2

Food

7.3

Overall

8.0

Comfort

7.9

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
United Airlines
7.4
Good
8,724 reviews
Delta
8.0
Very good
7,950 reviews

Boarding

8.2

Food

7.3

Overall

8.0

Comfort

7.9

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,950 reviews

Boarding

8.2

Food

7.3

Overall

8.0

Comfort

7.9

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Air Canada
7.0
Good
9,328 reviews
Delta
8.0
Very good
7,950 reviews

Boarding

8.2

Food

7.3

Overall

8.0

Comfort

7.9

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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.

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

    According to our current data, United Airlines ($516), Delta ($576), and American Airlines ($681) offers the cheapest pricing from Portland to Shannon, Clare. United Airlines is currently priced 36% below the average price you’ll pay for this route.

  • 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.

  • What is the cheapest month to book a flight from Portland to Shannon, Clare?

    Currently, February is the cheapest month in which you can book a flight from Portland to Shannon, Clare (average of $533). Flying from Portland to Shannon, Clare in June is currently the most expensive (average of $998). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Portland?

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

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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 May 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$453Average$849FlexibilityNo cancel feeOn-time71%
DeltaCheapest$548Average$855FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$565Average$808FlexibilityNo cancel feeOn-time69%

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