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Cheap flights from Portland, Maine to Shannon from €615

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 24/8. 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
1 adult, Economy, 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
12:00 - 07:30
PWM
-
SNN
14h 30m
1 stop
United Airlines Logo
09:30 - 22:01
SNN
-
PWM
17h 31m
1 stop
€615United Airlines
Mon, 24 Aug - Wed, 26 Aug
United Airlines Logo
14:35 - 10:15
PWM
-
SNN
14h 40m
2 stops
United Airlines Logo
09:30 - 23:59
SNN
-
PWM
19h 29m
2 stops
€619United Airlines
Mon, 24 Aug - Wed, 26 Aug
United Airlines Logo
06:00 - 07:30
PWM
-
SNN
20h 30m
1 stop
United Airlines Logo
09:30 - 17:44
SNN
-
PWM
13h 14m
1 stop
€624United Airlines
Thu, 16 Jul - Tue, 28 Jul
United Airlines Logo
05:15 - 07:30
PWM
-
SNN
21h 15m
2 stops
United Airlines Logo
09:30 - 23:51
SNN
-
PWM
19h 21m
2 stops
€629United Airlines
Thu, 16 Jul - Tue, 28 Jul
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
€642United Airlines
Fri, 8 May - Fri, 15 May
United Airlines Logo
19:10 - 10:15
PWM
-
SNN
34h 05m
2 stops
United Airlines Logo
12:30 - 10:23
SNN
-
PWM
26h 53m
2 stops
€646United Airlines
Fri, 8 May - Fri, 15 May
United Airlines Logo
20:16 - 10:15
PWM
-
SNN
8h 59m
1 stop
United Airlines Logo
09:30 - 21:42
SNN
-
PWM
17h 12m
1 stop
€668United Airlines
Thu, 16 Jul - Tue, 28 Jul
United Airlines Logo
05:15 - 07:30
PWM
-
SNN
21h 15m
2 stops
United Airlines Logo
09:30 - 23:51
SNN
-
PWM
19h 21m
2 stops
€672United Airlines
Thu, 16 Jul - Tue, 28 Jul
Lufthansa Logo
17:06 - 10:15
PWM
-
SNN
12h 09m
1 stop
Lufthansa Logo
12:30 - 13:42
SNN
-
PWM
30h 12m
1 stop
€847Lufthansa
Thu, 24 Sep - Wed, 7 Oct
Multiple Airlines Logo
15:03 - 11:20
PWM
-
SNN
15h 17m
2 stops
Multiple Airlines Logo
07:30 - 23:24
SNN
-
PWM
20h 54m
2 stops
€888Multiple Airlines
Thu, 24 Sep - Wed, 7 Oct

United Airlines flights from Portland, Maine to Shannon, Clare

Our best United Airlines deals on Portland, Maine to Shannon, Clare flight tickets
United Airlines
24 Aug
PWM12:00Portland
14h 30m
1 stop
SNN07:30Shannon
26 Aug
SNN09:30Shannon
17h 31m
1 stop
PWM22:01Portland
€615
United Airlines
24 Aug
PWM14:35Portland
14h 40m
2 stops
SNN10:15Shannon
26 Aug
SNN09:30Shannon
19h 29m
2 stops
PWM23:59Portland
€619
United Airlines
16 Jul
PWM06:00Portland
20h 30m
1 stop
SNN07:30Shannon
28 Jul
SNN09:30Shannon
13h 14m
1 stop
PWM17:44Portland
€624

Lufthansa flights from Portland, Maine to Shannon, Clare

Our best Lufthansa deals on Portland, Maine to Shannon, Clare flight tickets
Lufthansa
24 Sept
PWM17:06Portland
12h 09m
1 stop
SNN10:15Shannon
7 Oct
SNN12:30Shannon
30h 12m
1 stop
PWM13:42Portland
€847
Lufthansa
1 Jun
PWM18:25Portland
32h 05m
1 stop
SNN07:30Shannon
6 Jun
SNN12:00Shannon
16h 51m
2 stops
PWM23:51Portland
€7,996

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 29 March 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

Cheapest return flight

PortlandShannon

PWM - SNN

PWMSNN

Portland

Mon 24/8

12:00-07:30

1 stop14h 30m

Shannon

Wed 26/8

09:30-22:01

1 stop17h 31m

€615

PortlandShannon

PWM - SNN

PWMSNN

Portland

Mon 24/8

14:35-10:15

2 stops14h 40m

Shannon

Wed 26/8

09:30-23:59

2 stops19h 29m

€619

PortlandShannon

PWM - SNN

PWMSNN

Portland

Thu 16/7

06:00-07:30

1 stop20h 30m

Shannon

Tue 28/7

09:30-17:44

1 stop13h 14m

€624

PortlandShannon

PWM - SNN

PWMSNN

Portland

Thu 16/7

05:15-07:30

2 stops21h 15m

Shannon

Tue 28/7

09:30-23:51

2 stops19h 21m

€629
Fastest return journey

PortlandShannon

PWM - SNN

PWMSNN

Portland

Fri 8/5

19:50-10:15

1 stop9h 25m

Shannon

Fri 15/5

12:30-18:23

1 stop10h 53m

€642

PortlandShannon

PWM - SNN

PWMSNN

Portland

Fri 8/5

19:10-10:15

2 stops34h 05m

Shannon

Fri 15/5

12:30-10:23

2 stops26h 53m

€646

PortlandShannon

PWM - SNN

PWMSNN

Portland

Thu 16/7

20:16-10:15

1 stop8h 59m

Shannon

Tue 28/7

09:30-21:42

1 stop17h 12m

€668

PortlandShannon

PWM - SNN

PWMSNN

Portland

Thu 16/7

05:15-07:30

2 stops21h 15m

Shannon

Tue 28/7

09:30-23:51

2 stops19h 21m

€672

PortlandShannon

PWM - SNN

PWMSNN

Portland

Thu 24/9

17:06-10:15

1 stop12h 09m

Shannon

Wed 7/10

12:30-13:42

1 stop30h 12m

€847

PortlandShannon

PWM - SNN

PWMSNN

Portland

Thu 24/9

15:03-11:20

2 stops15h 17m

Shannon

Wed 7/10

07:30-23:24

2 stops20h 54m

€888

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

8h 59m

Direct flights

None
The fastest flight from Portland, Maine to Shannon, Clare takes 8h 59m
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. 8h 59m 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
Killaloe
Nenagh
Adare
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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