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Cheap flights from Portland, Maine to Shannon from €338

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Portland, Maine to Shannon departing on 9/4. 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.
United Airlines Logo
14:12 - 10:15
PWM
-
SNN
15h 03m
2 stops
United Airlines Logo
12:30 - 18:28
SNN
-
PWM
10h 58m
1 stop
€515United Airlines
Wed, 15 Apr - Sat, 25 Apr
United Airlines Logo
19:50 - 10:15
PWM
-
SNN
9h 25m
1 stop
United Airlines Logo
09:30 - 17:44
SNN
-
PWM
13h 14m
1 stop
€529United Airlines
Fri, 15 May - Sun, 24 May
United Airlines Logo
19:50 - 10:15
PWM
-
SNN
9h 25m
1 stop
United Airlines Logo
09:30 - 23:51
SNN
-
PWM
19h 21m
2 stops
€532United Airlines
Fri, 15 May - Sun, 24 May
United Airlines Logo
14:12 - 10:15
PWM
-
SNN
15h 03m
2 stops
United Airlines Logo
12:30 - 18:28
SNN
-
PWM
10h 58m
1 stop
€543United Airlines
Wed, 15 Apr - Sat, 25 Apr
Delta Logo
06:30 - 11:10
PWM
-
SNN
23h 40m
1 stop
Delta Logo
13:05 - 23:59
SNN
-
PWM
15h 54m
1 stop
€550Delta
Thu, 30 Jul - Mon, 10 Aug
Delta Logo
06:30 - 11:10
PWM
-
SNN
23h 40m
1 stop
Delta Logo
13:05 - 23:59
SNN
-
PWM
15h 54m
1 stop
€554Delta
Thu, 30 Jul - Mon, 10 Aug
United Airlines Logo
06:04 - 10:15
PWM
-
SNN
23h 11m
2 stops
United Airlines Logo
12:30 - 18:28
SNN
-
PWM
10h 58m
1 stop
€570United Airlines
Wed, 15 Apr - Sat, 25 Apr
Delta Logo
06:30 - 11:10
PWM
-
SNN
23h 40m
1 stop
Delta Logo
13:05 - 23:59
SNN
-
PWM
15h 54m
1 stop
€571Delta
Thu, 30 Jul - Mon, 10 Aug
United Airlines Logo
06:00 - 07:30
PWM
-
SNN
20h 30m
2 stops
United Airlines Logo
12:30 - 18:29
SNN
-
PWM
10h 59m
1 stop
€596United 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 - 18:28
SNN
-
PWM
10h 58m
1 stop
€604United Airlines
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
30 Jul
PWM14:39Portland
14h 46m
2 stops
SNN10:25Shannon
10 Aug
SNN11:00Shannon
17h 51m
2 stops
PWM23:51Portland
€614
American Airlines
15 Apr
PWM15:02Portland
15h 18m
2 stops
SNN11:20Shannon
25 Apr
SNN07:30Shannon
20h 57m
2 stops
PWM23:27Portland
€877
American Airlines
15 Apr
PWM15:02Portland
15h 18m
2 stops
SNN11:20Shannon
25 Apr
SNN07:30Shannon
20h 57m
2 stops
PWM23:27Portland
€919

Delta flights from Portland, Maine to Shannon, Clare

Our best Delta deals on Portland, Maine to Shannon, Clare flight tickets
Delta
30 Jul
PWM06:30Portland
23h 40m
1 stop
SNN11:10Shannon
10 Aug
SNN13:05Shannon
15h 54m
1 stop
PWM23:59Portland
€550
Delta
30 Jul
PWM06:30Portland
23h 40m
1 stop
SNN11:10Shannon
10 Aug
SNN13:05Shannon
15h 54m
1 stop
PWM23:59Portland
€554
Delta
30 Jul
PWM06:30Portland
23h 40m
1 stop
SNN11:10Shannon
10 Aug
SNN13:05Shannon
15h 54m
1 stop
PWM23:59Portland
€571

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 26 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

Wed 15/4

14:12-10:15

2 stops15h 03m

Shannon

Sat 25/4

12:30-18:28

1 stop10h 58m

€515

PortlandShannon

PWM - SNN

PWMSNN

Portland

Fri 15/5

19:50-10:15

1 stop9h 25m

Shannon

Sun 24/5

09:30-17:44

1 stop13h 14m

€529

PortlandShannon

PWM - SNN

PWMSNN

Portland

Fri 15/5

19:50-10:15

1 stop9h 25m

Shannon

Sun 24/5

09:30-23:51

2 stops19h 21m

€532

PortlandShannon

PWM - SNN

PWMSNN

Portland

Wed 15/4

14:12-10:15

2 stops15h 03m

Shannon

Sat 25/4

12:30-18:28

1 stop10h 58m

€543

PortlandShannon

PWM - SNN

PWMSNN

Portland

Thu 30/7

06:30-11:10

1 stop23h 40m

Shannon

Mon 10/8

13:05-23:59

1 stop15h 54m

€550

PortlandShannon

PWM - SNN

PWMSNN

Portland

Thu 30/7

06:30-11:10

1 stop23h 40m

Shannon

Mon 10/8

13:05-23:59

1 stop15h 54m

€554

PortlandShannon

PWM - SNN

PWMSNN

Portland

Wed 15/4

06:04-10:15

2 stops23h 11m

Shannon

Sat 25/4

12:30-18:28

1 stop10h 58m

€570

PortlandShannon

PWM - SNN

PWMSNN

Portland

Thu 30/7

06:30-11:10

1 stop23h 40m

Shannon

Mon 10/8

13:05-23:59

1 stop15h 54m

€571

PortlandShannon

PWM - SNN

PWMSNN

Portland

Thu 30/7

06:00-07:30

2 stops20h 30m

Shannon

Mon 10/8

12:30-18:29

1 stop10h 59m

€596

PortlandShannon

PWM - SNN

PWMSNN

Portland

Wed 15/4

19:12-10:15

1 stop10h 03m

Shannon

Sat 25/4

12:30-18:28

1 stop10h 58m

€604

Flights are sorted by cheapest return flights first.

Showing 1-10 of 12 resultsSorted by cheapest first
1
2

See travel insights to Shannon from

How to get the cheapest flight ticket from Portland, Maine to Shannon, Clare

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest airline that flies from Portland to Shannon?

United Airlines is the most popular carrier operating from Portland to Shannon

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.

Travelling to a place near Shannon?

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