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Cheap flights from Portland, Maine to Shannon from €757

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 15/4. 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.
American Airlines Logo
16:12 - 11:20
PWM
-
SNN
14h 08m2 stops
American Airlines Logo
07:40 - 22:27
SNN
-
PWM
19h 47m2 stops
€757American Airlines
Wed, 15 Apr - Sat, 25 Apr
American Airlines Logo
07:00 - 11:30
PWM
-
SNN
23h 30m2 stops
American Airlines Logo
07:50 - 23:51
SNN
-
PWM
21h 01m2 stops
€767American Airlines
Fri, 13 Feb - Wed, 18 Feb
United Airlines Logo
19:37 - 10:15
PWM
-
SNN
9h 38m1 stop
United Airlines Logo
12:30 - 18:47
SNN
-
PWM
11h 17m1 stop
€772United Airlines
Wed, 15 Apr - Sat, 25 Apr
United Airlines Logo
08:58 - 10:15
PWM
-
SNN
20h 17m2 stops
United Airlines Logo
12:30 - 18:47
SNN
-
PWM
11h 17m1 stop
€776United Airlines
Wed, 15 Apr - Sat, 25 Apr
American Airlines Logo
07:00 - 11:30
PWM
-
SNN
47h 30m2 stops
American Airlines Logo
07:50 - 23:17
SNN
-
PWM
20h 27m2 stops
€840American Airlines
Sat, 14 Feb - Sun, 22 Feb
American Airlines Logo
12:43 - 15:45
PWM
-
SNN
22h 02m2 stops
American Airlines Logo
07:50 - 23:17
SNN
-
PWM
20h 27m2 stops
€849American Airlines
Fri, 13 Feb - Thu, 19 Feb
American Airlines Logo
07:00 - 11:30
PWM
-
SNN
23h 30m2 stops
American Airlines Logo
07:50 - 23:17
SNN
-
PWM
20h 27m2 stops
€892American Airlines
Fri, 13 Feb - Sun, 22 Feb
American Airlines Logo
07:00 - 11:30
PWM
-
SNN
47h 30m2 stops
American Airlines Logo
07:50 - 10:58
SNN
-
PWM
32h 08m2 stops
€941American Airlines
Sat, 14 Feb - Sat, 21 Feb
American Airlines Logo
07:00 - 11:30
PWM
-
SNN
23h 30m2 stops
American Airlines Logo
07:50 - 23:17
SNN
-
PWM
20h 27m2 stops
€978American Airlines
Sun, 15 Feb - Fri, 20 Feb
American Airlines Logo
12:43 - 11:30
PWM
-
SNN
17h 47m2 stops
American Airlines Logo
07:50 - 10:58
SNN
-
PWM
32h 08m2 stops
€994American Airlines
Fri, 13 Feb - Sat, 21 Feb

American Airlines flights from Portland, Maine to Shannon, Clare

Our best American Airlines deals on Portland, Maine to Shannon, Clare flight tickets
American Airlines
15 Apr
PWM16:12Portland
14h 08m
2 stops
SNN11:20Shannon
25 Apr
SNN07:40Shannon
19h 47m
2 stops
PWM22:27Portland
€757
Find similar
American Airlines
13 Feb
PWM07:00Portland
23h 30m
2 stops
SNN11:30Shannon
18 Feb
SNN07:50Shannon
21h 01m
2 stops
PWM23:51Portland
€767
Find similar
American Airlines
14 Feb
PWM07:00Portland
47h 30m
2 stops
SNN11:30Shannon
22 Feb
SNN07:50Shannon
20h 27m
2 stops
PWM23:17Portland
€840
Find similar

United Airlines flights from Portland, Maine to Shannon, Clare

Our best United Airlines deals on Portland, Maine to Shannon, Clare flight tickets
United Airlines
15 Apr
PWM19:37Portland
9h 38m
1 stop
SNN10:15Shannon
25 Apr
SNN12:30Shannon
11h 17m
1 stop
PWM18:47Portland
€772
Find similar
United Airlines
15 Apr
PWM08:58Portland
20h 17m
2 stops
SNN10:15Shannon
25 Apr
SNN12:30Shannon
11h 17m
1 stop
PWM18:47Portland
€776
Find similar

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 13 December 2025.
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

Wed 15/4

16:12-11:20

2 stops14h 08m

Shannon

Sat 25/4

07:40-22:27

2 stops19h 47m

€757

PortlandShannon

PWM - SNN

PWMSNN

Portland

Fri 13/2

07:00-11:30

2 stops23h 30m

Shannon

Wed 18/2

07:50-23:51

2 stops21h 01m

€767

PortlandShannon

PWM - SNN

PWMSNN

Portland

Wed 15/4

19:37-10:15

1 stop9h 38m

Shannon

Sat 25/4

12:30-18:47

1 stop11h 17m

€772

PortlandShannon

PWM - SNN

PWMSNN

Portland

Wed 15/4

08:58-10:15

2 stops20h 17m

Shannon

Sat 25/4

12:30-18:47

1 stop11h 17m

€776

PortlandShannon

PWM - SNN

PWMSNN

Portland

Sat 14/2

07:00-11:30

2 stops47h 30m

Shannon

Sun 22/2

07:50-23:17

2 stops20h 27m

€840

PortlandShannon

PWM - SNN

PWMSNN

Portland

Fri 13/2

12:43-15:45

2 stops22h 02m

Shannon

Thu 19/2

07:50-23:17

2 stops20h 27m

€849

PortlandShannon

PWM - SNN

PWMSNN

Portland

Fri 13/2

07:00-11:30

2 stops23h 30m

Shannon

Sun 22/2

07:50-23:17

2 stops20h 27m

€892

PortlandShannon

PWM - SNN

PWMSNN

Portland

Sat 14/2

07:00-11:30

2 stops47h 30m

Shannon

Sat 21/2

07:50-10:58

2 stops32h 08m

€941

PortlandShannon

PWM - SNN

PWMSNN

Portland

Sun 15/2

07:00-11:30

2 stops23h 30m

Shannon

Fri 20/2

07:50-23:17

2 stops20h 27m

€978

PortlandShannon

PWM - SNN

PWMSNN

Portland

Fri 13/2

12:43-11:30

2 stops17h 47m

Shannon

Sat 21/2

07:50-10:58

2 stops32h 08m

€994

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 38m

Direct flights

None
The fastest flight from Portland, Maine to Shannon, Clare takes 9h 38m
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 38m 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
Nenagh
Tipperary
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.

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