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Shannon

$536+ Cheap flights from Portland, ME (PWM) 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 8/12. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — SNN
ago. 4 — ago. 111
lun. 8/4
lun. 8/11
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 (PWM) 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 julio 30, 2025.

Round-trip from

$536
(United Airlines)
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 julio 30, 2025.

This United Airlines deal was found by Cheapflights users on 7/29. 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.
mar. 8/126:10 amPWM - SNN
1 stop20h 20mUnited Airlines
mié. 8/209:30 amSNN - PWM
1 stop17h 29mUnited Airlines
Deal found 7/29$536
This American Airlines deal was found by Cheapflights users on 7/29. 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.
mié. 11/123:53 pmPWM - SNN
2 stops19h 52mAmerican Airlines
dom. 11/162:00 pmSNN - PWM
2 stops14h 38mAmerican Airlines
Deal found 7/29$788
This Air Canada deal was found by Cheapflights users on 7/30. 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.
sáb. 9/134:11 pmPWM - SNN
3 stops18h 54mAir Canada
sáb. 9/207:40 amSNN - PWM
3 stops30h 44mAir Canada
Deal found 7/30$1,026
This Mytrip deal was found by Cheapflights users on 7/30. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 9/133:21 pmPWM - SNN
2 stops18h 34mMultiple Airlines
sáb. 9/207:40 amSNN - PWM
3 stops30h 44mMultiple Airlines
Deal found 7/30$2,167

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 julio 30, 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

PWM - SNN

PWMSNN

Portland

mar. 8/12

6:10 am-7:30 am

1 stop20h 20m

Shannon

mié. 8/20

9:30 am-9:59 pm

1 stop17h 29m

$536

PortlandShannon

PWM - SNN

PWMSNN

Portland

mié. 11/12

3:53 pm-4:45 pm

2 stops19h 52m

Shannon

dom. 11/16

2:00 pm-11:38 pm

2 stops14h 38m

$788

PortlandShannon

PWM - SNN

PWMSNN

Portland

sáb. 9/13

4:11 pm-4:05 pm

3 stops18h 54m

Shannon

sáb. 9/20

7:40 am-9:24 am

3 stops30h 44m

$1,026

PortlandShannon

PWM - SNN

PWMSNN

Portland

sáb. 9/13

3:21 pm-2:55 pm

2 stops18h 34m

Shannon

sáb. 9/20

7:40 am-9:24 am

3 stops30h 44m

$2,167

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/29

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 month to book a flight from Portland, Maine to Shannon, Clare?

Currently, February is the cheapest month in which you can book a flight from Portland, Maine to Shannon, Clare (average of $533). Flying from Portland, Maine to Shannon, Clare in June is currently the most expensive (average of $932). 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.

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 julio 30, 2025.
Peruse reviews from past customers who have flown with United Airlines, American Airlines, and Air Canada from Portland to Shannon to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
8,896 reviews

Food

6.6

Boarding

7.7

Comfort

7.3

Crew

8.1

Overall

7.4

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
United Airlines
7.4
Good
8,896 reviews
United Airlines
7.4
Good
8,896 reviews

Food

6.6

Boarding

7.7

Comfort

7.3

Crew

8.1

Overall

7.4

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
American Airlines
7.2
Good
10,000 reviews
United Airlines
7.4
Good
8,896 reviews

Food

6.6

Boarding

7.7

Comfort

7.3

Crew

8.1

Overall

7.4

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
Air Canada
7.1
Good
9,837 reviews
United Airlines
7.4
Good
8,896 reviews

Food

6.6

Boarding

7.7

Comfort

7.3

Crew

8.1

Overall

7.4

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??

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.

  • 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, Maine to Shannon, Clare?

    Currently, February is the cheapest month in which you can book a flight from Portland, Maine to Shannon, Clare (average of $533). Flying from Portland, Maine to Shannon, Clare in June is currently the most expensive (average of $932). 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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