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Shannon

$351+ 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 10/12. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — SNN
Aug 25 — Sep 11
Mon 8/25
Mon 9/1
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 August 20, 2025.

Round-trip from

$517
(United Airlines)

One-way from

$351
(United Airlines)
From Portland to Shannon
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One-way flight from Portland to Shannon
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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 August 20, 2025.

This United Airlines deal was found by Cheapflights users on 8/18. 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 9/1110:51 amPDX - SNN
1 stop12h 39mUnited Airlines
Wed 9/249:30 amSNN - PDX
1 stop13h 55mUnited Airlines
Deal found 8/18$517
This United Airlines deal was found by Cheapflights users on 8/17. 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 9/35:00 amPDX - SNN
2 stops18h 30mUnited Airlines
Wed 9/109:30 amSNN - PDX
2 stops19h 07mUnited Airlines
Deal found 8/17$521
This United Airlines deal was found by Cheapflights users on 8/18. 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 9/125:30 amPDX - SNN
2 stops42h 00mUnited Airlines
Thu 9/2512:30 pmSNN - PDX
2 stops39h 50mUnited Airlines
Deal found 8/18$533
This American Airlines deal was found by Cheapflights users on 8/19. 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.
Fri 10/311:19 amPDX - SNN
2 stops20h 31mAmerican Airlines
Fri 10/107:40 amSNN - PDX
1 stop17h 55mAmerican Airlines
Deal found 8/19$609
This United Airlines deal was found by Cheapflights users on 8/20. 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 9/128:30 amPDX - SNN
1 stop15h 00mUnited Airlines
Fri 9/2612:30 pmSNN - PDX
1 stop16h 45mUnited Airlines
Deal found 8/20$631
This Air Canada deal was found by Cheapflights users on 8/17. 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.
Wed 11/129:50 amPDX - SNN
2 stops22h 55mAir Canada
Sun 11/167:50 amSNN - PDX
2 stops33h 25mAir Canada
Deal found 8/17$685

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 August 20, 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

10:51 am-7:30 am

1 stop12h 39m

Shannon

Wed 9/24

9:30 am-3:25 pm

1 stop13h 55m

$517

PortlandShannon

PDX - SNN

PDXSNN

Portland

Wed 9/3

5:00 am-7:30 am

2 stops18h 30m

Shannon

Wed 9/10

9:30 am-8:37 pm

2 stops19h 07m

$521

PortlandShannon

PDX - SNN

PDXSNN

Portland

Sun 10/12

11:55 pm-10:15 am

2 stops26h 20m

$351

PortlandShannon

PDX - SNN

PDXSNN

Portland

Fri 10/3

5:30 am-10:15 am

3 stops20h 45m

$430

PortlandShannon

PDX - SNN

PDXSNN

Portland

Fri 8/29

5:00 am-7:30 am

2 stops18h 30m

$430

PortlandShannon

PDX - SNN

PDXSNN

Portland

Sun 10/26

3:15 pm-4:45 pm

2 stops18h 30m

$438

PortlandShannon

PDX - SNN

PDXSNN

Portland

Sun 10/26

6:15 am-4:45 pm

2 stops27h 30m

$438

PortlandShannon

PDX - SNN

PDXSNN

Portland

Sun 10/26

6:45 pm-7:25 pm

1 stop17h 40m

$488

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/18

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 August 20, 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.

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 August 20, 2025.
Get a feel of what it's like to fly with Delta and United 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
8.0
Very good
7,982 reviews

Overall

8.0

Comfort

7.9

Boarding

8.2

Crew

8.5

Entertainment

7.9

Food

7.3

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
7,982 reviews
Delta
8.0
Very good
7,982 reviews

Overall

8.0

Comfort

7.9

Boarding

8.2

Crew

8.5

Entertainment

7.9

Food

7.3

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
8,928 reviews
Delta
8.0
Very good
7,982 reviews

Overall

8.0

Comfort

7.9

Boarding

8.2

Crew

8.5

Entertainment

7.9

Food

7.3

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.

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

    A quick flight from Portland to Shannon, Clare can take about 12h 39m. United Airlines provides one of the quickest options available for as low as $517. 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 ($546), 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.

  • 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 $931). 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 Shannon?

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

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Top 2 airlines flying from Portland to Shannon

Discover the top 2 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 August 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$546Average$933FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$561Average$773FlexibilityNo cancel feeOn-time69%

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