Latest deals
When to book
FAQs
Price Alerts

Cheap flights from Portland, Maine to Shannon from €524

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
Voted the Winner of Europe's Best Travel App 2023

Save money when you book flights with momondo

Big names, great deals

Big names, great deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customise your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Find the cheapest flights from Portland, Maine to Shannon

Cheap return flights

Enter your travel dates to find the best prices.
United Airlines Logo
19:45 - 10:15PWM-SNN
9h 30m1 stop
United Airlines Logo
12:30 - 18:20SNN-PWM
10h 50m1 stop
€524United 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
€528United Airlines
Find Deal
Wed, 15 Apr - Sat, 25 Apr
American Airlines Logo
15:55 - 16:45PWM-SNN
19h 50m2 stops
American Airlines Logo
07:50 - 21:37SNN-PWM
18h 47m2 stops
€580American Airlines
Find Deal
Mon, 8 Dec - Tue, 16 Dec
United Airlines Logo
19:37 - 10:15PWM-SNN
9h 38m1 stop
United Airlines Logo
12:30 - 18:47SNN-PWM
11h 17m1 stop
€607United Airlines
Find Deal
Wed, 15 Apr - Sat, 25 Apr
United Airlines Logo
08:58 - 10:15PWM-SNN
20h 17m2 stops
United Airlines Logo
12:30 - 18:47SNN-PWM
11h 17m1 stop
€623United Airlines
Find Deal
Wed, 15 Apr - Sat, 25 Apr
American Airlines Logo
13:15 - 11:20PWM-SNN
17h 05m2 stops
American Airlines Logo
07:40 - 22:27SNN-PWM
19h 47m2 stops
€789American Airlines
Find Deal
Wed, 15 Apr - Sat, 25 Apr
American Airlines Logo
13:15 - 11:20PWM-SNN
17h 05m2 stops
American Airlines Logo
07:40 - 22:27SNN-PWM
19h 47m2 stops
€790American Airlines
Find Deal
Wed, 15 Apr - Sat, 25 Apr
American Airlines Logo
12:26 - 06:20PWM-SNN
12h 54m2 stops
American Airlines Logo
07:50 - 22:33SNN-PWM
19h 43m2 stops
€815American Airlines
Find Deal
Wed, 19 Nov - Sun, 23 Nov
Air Canada Logo
10:35 - 11:30PWM-SNN
19h 55m3 stops
Air Canada Logo
07:50 - 23:09SNN-PWM
20h 19m3 stops
€957Air Canada
Find Deal
Mon, 8 Dec - Tue, 16 Dec
Air Canada Logo
11:17 - 11:20PWM-SNN
19h 03m3 stops
Air Canada Logo
07:40 - 10:48SNN-PWM
32h 08m3 stops
€1,000Air Canada
Find Deal
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
15 Apr
PWM19:45Portland
9h 30m
1 stop
SNN10:15Shannon
25 Apr
SNN12:30Shannon
10h 50m
1 stop
PWM18:20Portland
€524
Find similar
United Airlines
15 Apr
PWM11:50Portland
17h 25m
2 stops
SNN10:15Shannon
25 Apr
SNN12:30Shannon
10h 50m
1 stop
PWM18:20Portland
€528
Find similar
United Airlines
15 Apr
PWM19:37Portland
9h 38m
1 stop
SNN10:15Shannon
25 Apr
SNN12:30Shannon
11h 17m
1 stop
PWM18:47Portland
€607
Find similar

American Airlines flights from Portland, Maine to Shannon, Clare

Our best American Airlines deals on Portland, Maine to Shannon, Clare flight tickets
American Airlines
8 Dec
PWM15:55Portland
19h 50m
2 stops
SNN16:45Shannon
16 Dec
SNN07:50Shannon
18h 47m
2 stops
PWM21:37Portland
€580
Find similar
American Airlines
15 Apr
PWM13:15Portland
17h 05m
2 stops
SNN11:20Shannon
25 Apr
SNN07:40Shannon
19h 47m
2 stops
PWM22:27Portland
€789
Find similar
American Airlines
15 Apr
PWM13:15Portland
17h 05m
2 stops
SNN11:20Shannon
25 Apr
SNN07:40Shannon
19h 47m
2 stops
PWM22:27Portland
€790
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 7 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

Wed 15/4

19:45-10:15

1 stop9h 30m

Shannon

Sat 25/4

12:30-18:20

1 stop10h 50m

€524

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

€528

PortlandShannon

PWM - SNN

PWMSNN

Portland

Mon 8/12

15:55-16:45

2 stops19h 50m

Shannon

Tue 16/12

07:50-21:37

2 stops18h 47m

€580

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

€607

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

€623

PortlandShannon

PWM - SNN

PWMSNN

Portland

Wed 15/4

13:15-11:20

2 stops17h 05m

Shannon

Sat 25/4

07:40-22:27

2 stops19h 47m

€789

PortlandShannon

PWM - SNN

PWMSNN

Portland

Wed 15/4

13:15-11:20

2 stops17h 05m

Shannon

Sat 25/4

07:40-22:27

2 stops19h 47m

€790

PortlandShannon

PWM - SNN

PWMSNN

Portland

Wed 19/11

12:26-06:20

2 stops12h 54m

Shannon

Sun 23/11

07:50-22:33

2 stops19h 43m

€815

PortlandShannon

PWM - SNN

PWMSNN

Portland

Mon 8/12

10:35-11:30

3 stops19h 55m

Shannon

Tue 16/12

07:50-23:09

3 stops20h 19m

€957

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

€1,000

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.
Search flight deals

  • 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.

An easier way to manage your Shannon, Clare trip

We make it super easy to schedule, organise and travel with friends or family. Trips is free – and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Sun 7/12
Sun 14/12
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Ireland