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Cheap flights from Portland, Maine to Shannon from €523

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 24/3. 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
16:11 - 11:30PWM-SNN
15h 19m2 stops
American Airlines Logo
07:40 - 22:32SNN-PWM
19h 52m2 stops
€523American Airlines
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Tue, 24 Mar - Mon, 30 Mar
United Airlines Logo
19:45 - 10:15PWM-SNN
9h 30m1 stop
United Airlines Logo
12:30 - 18:20SNN-PWM
10h 50m1 stop
€526United Airlines
Find Deal
Wed, 15 Apr - Sat, 25 Apr
United Airlines Logo
11:50 - 10:15PWM-SNN
17h 25m2 stops
United Airlines Logo
12:30 - 18:20SNN-PWM
10h 50m1 stop
€530United Airlines
Find Deal
Wed, 15 Apr - Sat, 25 Apr
Air Canada Logo
11:17 - 11:30PWM-SNN
20h 13m3 stops
Air Canada Logo
21:15 - 18:20SNN-PWM
26h 05m3 stops
€666Air Canada
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Tue, 24 Mar - Mon, 30 Mar
American Airlines Logo
16:12 - 11:20PWM-SNN
14h 08m2 stops
American Airlines Logo
07:40 - 22:27SNN-PWM
19h 47m2 stops
€792American Airlines
Find Deal
Wed, 15 Apr - Sat, 25 Apr
Air Canada Logo
11:17 - 11:20PWM-SNN
19h 03m3 stops
Air Canada Logo
07:40 - 10:48SNN-PWM
32h 08m3 stops
€895Air Canada
Find Deal
Wed, 15 Apr - Sat, 25 Apr
Air Canada Logo
11:17 - 11:20PWM-SNN
19h 03m3 stops
Air Canada Logo
07:40 - 10:48SNN-PWM
32h 08m3 stops
€1,002Air Canada
Find Deal
Wed, 15 Apr - Sat, 25 Apr
American Airlines Logo
13:15 - 05:25PWM-SNN
11h 10m2 stops
American Airlines Logo
07:40 - 21:24SNN-PWM
18h 44m3 stops
€1,942American Airlines
Find Deal
Wed, 15 Apr - Sat, 25 Apr

American Airlines flights from Portland, Maine to Shannon, Clare

Our best American Airlines deals on Portland, Maine to Shannon, Clare flight tickets
American Airlines
24 Mar
PWM16:11Portland
15h 19m
2 stops
SNN11:30Shannon
30 Mar
SNN07:40Shannon
19h 52m
2 stops
PWM22:32Portland
€523
Find similar
American Airlines
15 Apr
PWM13:15Portland
17h 05m
2 stops
SNN11:20Shannon
25 Apr
SNN07:40Shannon
19h 47m
2 stops
PWM22:27Portland
€792
Find similar
American Airlines
12 Nov
PWM15:52Portland
19h 53m
2 stops
SNN16:45Shannon
16 Nov
SNN14:45Shannon
26h 01m
2 stops
PWM11:46Portland
€873
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
PWM19:45Portland
9h 30m
1 stop
SNN10:15Shannon
25 Apr
SNN12:30Shannon
10h 50m
1 stop
PWM18:20Portland
€526
Find similar
United Airlines
15 Apr
PWM11:50Portland
17h 25m
2 stops
SNN10:15Shannon
25 Apr
SNN12:30Shannon
10h 50m
1 stop
PWM18:20Portland
€530
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 3 November 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

Tue 24/3

16:11-11:30

2 stops15h 19m

Shannon

Mon 30/3

07:40-22:32

2 stops19h 52m

€523

PortlandShannon

PWM - SNN

PWMSNN

Portland

Wed 15/4

19:45-10:15

1 stop9h 30m

Shannon

Sat 25/4

12:30-18:20

1 stop10h 50m

€526

PortlandShannon

PWM - SNN

PWMSNN

Portland

Wed 15/4

11:50-10:15

2 stops17h 25m

Shannon

Sat 25/4

12:30-18:20

1 stop10h 50m

€530

PortlandShannon

PWM - SNN

PWMSNN

Portland

Tue 24/3

11:17-11:30

3 stops20h 13m

Shannon

Mon 30/3

21:15-18:20

3 stops26h 05m

€666

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

€792

PortlandShannon

PWM - SNN

PWMSNN

Portland

Wed 15/4

11:17-11:20

3 stops19h 03m

Shannon

Sat 25/4

07:40-10:48

3 stops32h 08m

€895

PortlandShannon

PWM - SNN

PWMSNN

Portland

Wed 15/4

11:17-11:20

3 stops19h 03m

Shannon

Sat 25/4

07:40-10:48

3 stops32h 08m

€1,002

PortlandShannon

PWM - SNN

PWMSNN

Portland

Wed 15/4

13:15-05:25

2 stops11h 10m

Shannon

Sat 25/4

07:40-21:24

3 stops18h 44m

€1,942

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

Direct flights

None
There are no direct flights from Portland, Maine to Shannon, Clare. There are no popular flight routes from Portland, Maine to Shannon, Clare.
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  • How far is Portland to Shannon by plane?

    The distance between Portland and Shannon is about 4512.9 km. 9h 30m 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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