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Cheap flights from Portland, Maine to Shannon from €450

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 23/2. 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
12:29 - 11:30
PWM
-
SNN
18h 01m2 stops
American Airlines Logo
07:50 - 22:50
SNN
-
PWM
20h 00m2 stops
€450American Airlines
Mon, 23 Feb - Mon, 2 Mar
Air Canada Logo
06:00 - 11:30
PWM
-
SNN
24h 30m3 stops
Air Canada Logo
07:50 - 23:20
SNN
-
PWM
20h 30m3 stops
€603Air Canada
Mon, 23 Feb - Mon, 2 Mar
American Airlines Logo
10:47 - 05:55
PWM
-
SNN
14h 08m2 stops
American Airlines Logo
07:40 - 23:10
SNN
-
PWM
20h 30m2 stops
€637American Airlines
Wed, 15 Apr - Sat, 25 Apr
American Airlines Logo
10:47 - 05:55
PWM
-
SNN
14h 08m2 stops
American Airlines Logo
07:40 - 23:22
SNN
-
PWM
20h 42m2 stops
€661American Airlines
Wed, 15 Apr - Sat, 25 Apr
KLM Logo
14:35 - 11:10
PWM
-
SNN
15h 35m1 stop
KLM Logo
13:05 - 23:59
SNN
-
PWM
15h 54m1 stop
€704KLM
Fri, 12 Jun - Mon, 22 Jun
Multiple Airlines Logo
12:50 - 11:10
PWM
-
SNN
17h 20m2 stops
Multiple Airlines Logo
13:05 - 23:59
SNN
-
PWM
15h 54m1 stop
€708Multiple Airlines
Fri, 12 Jun - Mon, 22 Jun
United Airlines Logo
06:04 - 10:15
PWM
-
SNN
23h 11m2 stops
United Airlines Logo
12:30 - 18:40
SNN
-
PWM
11h 10m1 stop
€709United Airlines
Wed, 15 Apr - Sat, 25 Apr
Delta Logo
12:50 - 11:10
PWM
-
SNN
17h 20m2 stops
Delta Logo
13:05 - 11:55
SNN
-
PWM
27h 50m2 stops
€717Delta
Fri, 12 Jun - Mon, 22 Jun
United Airlines Logo
06:04 - 10:15
PWM
-
SNN
23h 11m2 stops
United Airlines Logo
12:30 - 18:40
SNN
-
PWM
11h 10m1 stop
€842United Airlines
Wed, 15 Apr - Sat, 25 Apr
United Airlines Logo
19:22 - 10:15
PWM
-
SNN
33h 53m2 stops
United Airlines Logo
12:30 - 18:13
SNN
-
PWM
10h 43m1 stop
€896United Airlines
Fri, 12 Jun - Mon, 22 Jun

American Airlines flights from Portland, Maine to Shannon, Clare

Our best American Airlines deals on Portland, Maine to Shannon, Clare flight tickets
American Airlines
23 Feb
PWM12:29Portland
18h 01m
2 stops
SNN11:30Shannon
2 Mar
SNN07:50Shannon
20h 00m
2 stops
PWM22:50Portland
€450
American Airlines
15 Apr
PWM10:47Portland
14h 08m
2 stops
SNN05:55Shannon
25 Apr
SNN07:40Shannon
20h 30m
2 stops
PWM23:10Portland
€637
American Airlines
15 Apr
PWM10:47Portland
14h 08m
2 stops
SNN05:55Shannon
25 Apr
SNN07:40Shannon
20h 42m
2 stops
PWM23:22Portland
€661

Air Canada flights from Portland, Maine to Shannon, Clare

Our best Air Canada deals on Portland, Maine to Shannon, Clare flight tickets
Air Canada
23 Feb
PWM06:00Portland
24h 30m
3 stops
SNN11:30Shannon
2 Mar
SNN07:50Shannon
20h 30m
3 stops
PWM23:20Portland
€603
Air Canada
12 Jun
PWM11:17Portland
19h 03m
3 stops
SNN11:20Shannon
22 Jun
SNN21:15Shannon
25h 58m
3 stops
PWM18:13Portland
€1,148
Air Canada
15 Apr
PWM11:09Portland
19h 11m
3 stops
SNN11:20Shannon
25 Apr
SNN17:30Shannon
30h 10m
3 stops
PWM18:40Portland
€2,255

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 11 January 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

Mon 23/2

12:29-11:30

2 stops18h 01m

Shannon

Mon 2/3

07:50-22:50

2 stops20h 00m

€450

PortlandShannon

PWM - SNN

PWMSNN

Portland

Mon 23/2

06:00-11:30

3 stops24h 30m

Shannon

Mon 2/3

07:50-23:20

3 stops20h 30m

€603

PortlandShannon

PWM - SNN

PWMSNN

Portland

Wed 15/4

10:47-05:55

2 stops14h 08m

Shannon

Sat 25/4

07:40-23:10

2 stops20h 30m

€637

PortlandShannon

PWM - SNN

PWMSNN

Portland

Wed 15/4

10:47-05:55

2 stops14h 08m

Shannon

Sat 25/4

07:40-23:22

2 stops20h 42m

€661

PortlandShannon

PWM - SNN

PWMSNN

Portland

Fri 12/6

14:35-11:10

1 stop15h 35m

Shannon

Mon 22/6

13:05-23:59

1 stop15h 54m

€704

PortlandShannon

PWM - SNN

PWMSNN

Portland

Fri 12/6

12:50-11:10

2 stops17h 20m

Shannon

Mon 22/6

13:05-23:59

1 stop15h 54m

€708

PortlandShannon

PWM - SNN

PWMSNN

Portland

Wed 15/4

06:04-10:15

2 stops23h 11m

Shannon

Sat 25/4

12:30-18:40

1 stop11h 10m

€709

PortlandShannon

PWM - SNN

PWMSNN

Portland

Fri 12/6

12:50-11:10

2 stops17h 20m

Shannon

Mon 22/6

13:05-11:55

2 stops27h 50m

€716

PortlandShannon

PWM - SNN

PWMSNN

Portland

Wed 15/4

06:04-10:15

2 stops23h 11m

Shannon

Sat 25/4

12:30-18:40

1 stop11h 10m

€842

PortlandShannon

PWM - SNN

PWMSNN

Portland

Fri 12/6

19:22-10:15

2 stops33h 53m

Shannon

Mon 22/6

12:30-18:13

1 stop10h 43m

€896

Flights are sorted by cheapest return flights first.

Showing 1-10 of 14 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

15h 35m

Direct flights

None
The fastest flight from Portland, Maine to Shannon, Clare takes 15h 35m
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. 15h 35m 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
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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