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Cheap flights from Portland, Maine to Shannon from €413

This is the cheapest return flight price found by a momondo user in the last 72 hours by searching for a flight from Portland, Maine to Shannon departing on 1/5. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags
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Find the cheapest flights from Portland, Maine to Shannon

Cheap return flights

Enter your travel dates to find the best prices.
United Airlines Logo
19:50 - 10:15
PWM
-
SNN
9h 25m
1 stop
United Airlines Logo
12:30 - 18:23
SNN
-
PWM
10h 53m
1 stop
€413United Airlines
Fri, 1 May - Fri, 8 May
United Airlines Logo
19:50 - 10:15
PWM
-
SNN
9h 25m
1 stop
United Airlines Logo
12:30 - 21:19
SNN
-
PWM
37h 49m
2 stops
€425United Airlines
Fri, 1 May - Fri, 8 May
KLM Logo
14:35 - 11:10
PWM
-
SNN
15h 35m
1 stop
KLM Logo
13:05 - 23:59
SNN
-
PWM
15h 54m
1 stop
€439KLM
Thu, 30 Jul - Mon, 10 Aug
United Airlines Logo
05:20 - 07:30
PWM
-
SNN
21h 10m
2 stops
United Airlines Logo
12:30 - 18:27
SNN
-
PWM
10h 57m
1 stop
€443United Airlines
Thu, 30 Jul - Mon, 10 Aug
United Airlines Logo
19:50 - 10:15
PWM
-
SNN
9h 25m
1 stop
United Airlines Logo
09:30 - 17:42
SNN
-
PWM
13h 12m
1 stop
€464United Airlines
Sun, 17 May - Sun, 24 May
United Airlines Logo
19:50 - 10:15
PWM
-
SNN
9h 25m
1 stop
United Airlines Logo
09:30 - 23:30
SNN
-
PWM
19h 00m
2 stops
€468United Airlines
Sun, 17 May - Sun, 24 May
United Airlines Logo
06:00 - 07:30
PWM
-
SNN
20h 30m
1 stop
United Airlines Logo
12:30 - 18:27
SNN
-
PWM
10h 57m
1 stop
€560United Airlines
Mon, 1 Jun - Sat, 13 Jun
United Airlines Logo
06:00 - 07:30
PWM
-
SNN
20h 30m
2 stops
United Airlines Logo
09:30 - 23:30
SNN
-
PWM
19h 00m
2 stops
€564United Airlines
Thu, 21 May - Sat, 30 May
American Airlines Logo
14:39 - 10:25
PWM
-
SNN
14h 46m
2 stops
American Airlines Logo
11:00 - 23:51
SNN
-
PWM
17h 51m
2 stops
€612American Airlines
Thu, 30 Jul - Mon, 10 Aug
United Airlines Logo
19:12 - 10:15
PWM
-
SNN
10h 03m
1 stop
United Airlines Logo
12:30 - 17:32
SNN
-
PWM
34h 02m
2 stops
€625United Airlines
Wed, 15 Apr - Sat, 25 Apr

United Airlines flights from Portland, Maine to Shannon, Clare

Our best United Airlines deals on Portland, Maine to Shannon, Clare flight tickets
United Airlines
1 May
PWM19:50Portland
9h 25m
1 stop
SNN10:15Shannon
8 May
SNN12:30Shannon
10h 53m
1 stop
PWM18:23Portland
€413
United Airlines
1 May
PWM19:50Portland
9h 25m
1 stop
SNN10:15Shannon
8 May
SNN12:30Shannon
37h 49m
2 stops
PWM21:19Portland
€425
United Airlines
30 Jul
PWM05:20Portland
21h 10m
2 stops
SNN07:30Shannon
10 Aug
SNN12:30Shannon
10h 57m
1 stop
PWM18:27Portland
€443

Air Canada flights from Portland, Maine to Shannon, Clare

Our best Air Canada deals on Portland, Maine to Shannon, Clare flight tickets
Air Canada
21 May
PWM10:55Portland
19h 25m
3 stops
SNN11:20Shannon
30 May
SNN07:30Shannon
21h 00m
3 stops
PWM23:30Portland
€916
Air Canada
17 May
PWM11:08Portland
19h 12m
3 stops
SNN11:20Shannon
24 May
SNN07:30Shannon
21h 00m
3 stops
PWM23:30Portland
€1,013
Air Canada
15 Apr
PWM11:09Portland
19h 11m
3 stops
SNN11:20Shannon
25 Apr
SNN07:30Shannon
20h 58m
3 stops
PWM23:28Portland
€2,163

momondo Fare Finder

 
Customise your flight search to find flights from Portland, Maine to Shannon, Clare 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, momondo users made 13,528 searches. Data last updated 2 February 2026.
Use the filters below to find and compare flights from Portland, Maine to Shannon, Clare that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

PortlandShannon

PWM - SNN

PWMSNN

Portland

Fri 1/5

19:50-10:15

1 stop9h 25m

Shannon

Fri 8/5

12:30-18:23

1 stop10h 53m

€413

PortlandShannon

PWM - SNN

PWMSNN

Portland

Fri 1/5

19:50-10:15

1 stop9h 25m

Shannon

Fri 8/5

12:30-21:19

2 stops37h 49m

€425

PortlandShannon

PWM - SNN

PWMSNN

Portland

Thu 30/7

14:35-11:10

1 stop15h 35m

Shannon

Mon 10/8

13:05-23:59

1 stop15h 54m

€439

PortlandShannon

PWM - SNN

PWMSNN

Portland

Thu 30/7

05:20-07:30

2 stops21h 10m

Shannon

Mon 10/8

12:30-18:27

1 stop10h 57m

€443

PortlandShannon

PWM - SNN

PWMSNN

Portland

Sun 17/5

19:50-10:15

1 stop9h 25m

Shannon

Sun 24/5

09:30-17:42

1 stop13h 12m

€464

PortlandShannon

PWM - SNN

PWMSNN

Portland

Sun 17/5

19:50-10:15

1 stop9h 25m

Shannon

Sun 24/5

09:30-23:30

2 stops19h 00m

€468

PortlandShannon

PWM - SNN

PWMSNN

Portland

Mon 1/6

06:00-07:30

1 stop20h 30m

Shannon

Sat 13/6

12:30-18:27

1 stop10h 57m

€560

PortlandShannon

PWM - SNN

PWMSNN

Portland

Thu 21/5

06:00-07:30

2 stops20h 30m

Shannon

Sat 30/5

09:30-23:30

2 stops19h 00m

€564

PortlandShannon

PWM - SNN

PWMSNN

Portland

Thu 30/7

14:39-10:25

2 stops14h 46m

Shannon

Mon 10/8

11:00-23:51

2 stops17h 51m

€612

PortlandShannon

PWM - SNN

PWMSNN

Portland

Wed 15/4

19:12-10:15

1 stop10h 03m

Shannon

Sat 25/4

12:30-17:32

2 stops34h 02m

€625

Flights are sorted by cheapest return flights first.

Sorted by cheapest first

When to book flights from Portland, Maine to Shannon, Clare

Are you open to changing your travel dates? Check out the ideal times to fly from Portland, Maine to Shannon, Clare according to our flight data. Find out which month and days have the cheapest flights.
Estimated return price

Cheap Portland, Maine to Shannon, Clare (PWM to SNN) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Portland, Maine to Shannon, Clare

Fastest flight time

9h 25m

Direct flights

None
The fastest flight from Portland, Maine to Shannon, Clare takes 9h 25m
There are no direct flights from Portland, Maine to Shannon, Clare. There are no popular flight routes from Portland, Maine to Shannon, Clare.
Search flight deals

  • How far is Portland to Shannon by plane?

    The distance between Portland and Shannon is about 4512.9 km. 9h 25m is a normal flight duration for this route.

  • When did momondo last update prices for flights from Portland Airport to Shannon Airport?

    Prices for flights from Portland Airport to Shannon Airport were last updated today.

  • How old do you have to be to fly from Portland Airport to Shannon Airport?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and stopovers. It is recommended that you verify with the airline you are booking with for travel from Portland Airport to Shannon Airport.

  • What documentation or ID do you need to fly to Shannon Airport?

    The travel and health documents you'll need for your trip to Shannon Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's licence and a passport that is valid for six months after your intended arrival at Shannon Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • How do I get Price Alerts for flights from Portland, Maine to Shannon, Clare?

    Search flight deals from Portland, Maine to Shannon, Clare. While viewing offers you’ll have the option to create a Price Alert.

  • How can I save money on flights from Portland, Maine to Shannon, Clare with momondo?

    By using tools like our “Price Calendar”, you can see the best days for return flights on your travels. Our “Price Forecast” tool uses AI to predict whether you should purchase or hold off on booking for potentially cheaper prices. Explore shows you all flight options from a city or airport to build your own unique adventure. The Discover blog also provides valuable insights for saving money while booking your experience. After searching you can toggle on “Price Alerts” to track prices for your desired flight and book at the ideal moment.

  • How does momondo find its flight prices?

    We show prices from over 700+ competitors with a single click. With options from airlines and OTAs from across our 30 international markets, we are able to show you a diverse range of deals to create your adventure.

Travelling to a place near Shannon?

Book flights to Shannon if you plan to visit one of these locations
Limerick
Ennis
Tipperary
Nenagh
Adare
Killaloe
Lahinch
Bunratty

Why use momondo?

Why should I use momondo to find a flight deal from Portland to Shannon?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Shannon from Portland.

Can I find flights from Portland to Shannon with flexible booking policies on momondo?

Flights from Portland to Shannon with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Portland to Shannon?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Shannon from Portland.

I’m not ready to book a flight from Portland to Shannon right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of Portland to Shannon flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

An easier way to manage your Shannon, Clare trip

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