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Cheap flights from Portland, Maine to Shannon from €198

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 8/8. 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
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
06:00 - 07:30
PWM
-
SNN
20h 30m
1 stop
United Airlines Logo
12:30 - 18:27
SNN
-
PWM
10h 57m
1 stop
€437United Airlines
Thu, 30 Jul - Mon, 10 Aug
United Airlines Logo
06:00 - 07:30
PWM
-
SNN
20h 30m
2 stops
United Airlines Logo
12:30 - 18:27
SNN
-
PWM
10h 57m
1 stop
€441United Airlines
Thu, 30 Jul - Mon, 10 Aug
United Airlines Logo
06:04 - 10:15
PWM
-
SNN
23h 11m
2 stops
United Airlines Logo
12:30 - 21:40
SNN
-
PWM
38h 10m
2 stops
€535United Airlines
Wed, 15 Apr - Sat, 25 Apr
United Airlines Logo
19:12 - 10:15
PWM
-
SNN
10h 03m
1 stop
United Airlines Logo
12:30 - 21:40
SNN
-
PWM
38h 10m
2 stops
€551United Airlines
Wed, 15 Apr - Sat, 25 Apr
United Airlines Logo
19:12 - 10:15
PWM
-
SNN
10h 03m
1 stop
United Airlines Logo
12:30 - 21:40
SNN
-
PWM
38h 10m
2 stops
€559United Airlines
Wed, 15 Apr - Sat, 25 Apr
American Airlines Logo
14:39 - 10:25
PWM
-
SNN
14h 46m
2 stops
American Airlines Logo
11:00 - 23:24
SNN
-
PWM
17h 24m
2 stops
€609American 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 - 18:40
SNN
-
PWM
11h 10m
1 stop
€689United Airlines
Wed, 15 Apr - Sat, 25 Apr
United Airlines Logo
06:04 - 10:15
PWM
-
SNN
23h 11m
2 stops
United Airlines Logo
12:30 - 17:32
SNN
-
PWM
34h 02m
2 stops
€696United Airlines
Wed, 15 Apr - Sat, 25 Apr
United Airlines Logo
19:12 - 10:15
PWM
-
SNN
10h 03m
1 stop
United Airlines Logo
12:30 - 18:40
SNN
-
PWM
11h 10m
1 stop
€697United Airlines
Wed, 15 Apr - Sat, 25 Apr
Air Canada Logo
15:15 - 16:10
PWM
-
SNN
19h 55m
3 stops
Air Canada Logo
07:30 - 23:30
SNN
-
PWM
21h 00m
3 stops
€1,773Air Canada
Thu, 30 Jul - Mon, 10 Aug

United Airlines flights from Portland, Maine to Shannon, Clare

Our best United Airlines deals on Portland, Maine to Shannon, Clare flight tickets
United Airlines
30 Jul
PWM06:00Portland
20h 30m
1 stop
SNN07:30Shannon
10 Aug
SNN12:30Shannon
10h 57m
1 stop
PWM18:27Portland
€437
United Airlines
30 Jul
PWM06:00Portland
20h 30m
2 stops
SNN07:30Shannon
10 Aug
SNN12:30Shannon
10h 57m
1 stop
PWM18:27Portland
€441
United Airlines
15 Apr
PWM06:04Portland
23h 11m
2 stops
SNN10:15Shannon
25 Apr
SNN12:30Shannon
38h 10m
2 stops
PWM21:40Portland
€535

Air Canada flights from Portland, Maine to Shannon, Clare

Our best Air Canada deals on Portland, Maine to Shannon, Clare flight tickets
Air Canada
30 Jul
PWM15:15Portland
19h 55m
3 stops
SNN16:10Shannon
10 Aug
SNN07:30Shannon
21h 00m
3 stops
PWM23:30Portland
€1,773
Air Canada
30 Jul
PWM15:15Portland
19h 55m
3 stops
SNN16:10Shannon
10 Aug
SNN07:30Shannon
21h 00m
3 stops
PWM23:30Portland
€1,774
Air Canada
30 Jul
PWM15:15Portland
19h 55m
3 stops
SNN16:10Shannon
10 Aug
SNN07:30Shannon
21h 00m
3 stops
PWM23:30Portland
€1,777

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 12 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

Thu 30/7

06:00-07:30

1 stop20h 30m

Shannon

Mon 10/8

12:30-18:27

1 stop10h 57m

€437

PortlandShannon

PWM - SNN

PWMSNN

Portland

Thu 30/7

06:00-07:30

2 stops20h 30m

Shannon

Mon 10/8

12:30-18:27

1 stop10h 57m

€441

PortlandShannon

PWM - SNN

PWMSNN

Portland

Wed 15/4

06:04-10:15

2 stops23h 11m

Shannon

Sat 25/4

12:30-21:40

2 stops38h 10m

€535

PortlandShannon

PWM - SNN

PWMSNN

Portland

Wed 15/4

19:12-10:15

1 stop10h 03m

Shannon

Sat 25/4

12:30-21:40

2 stops38h 10m

€551

PortlandShannon

PWM - SNN

PWMSNN

Portland

Wed 15/4

19:12-10:15

1 stop10h 03m

Shannon

Sat 25/4

12:30-21:40

2 stops38h 10m

€559

PortlandShannon

PWM - SNN

PWMSNN

Portland

Thu 30/7

14:39-10:25

2 stops14h 46m

Shannon

Mon 10/8

11:00-23:24

2 stops17h 24m

€609

PortlandShannon

PWM - SNN

PWMSNN

Portland

Wed 15/4

19:12-10:15

1 stop10h 03m

Shannon

Sat 25/4

12:30-18:40

1 stop11h 10m

€689

PortlandShannon

PWM - SNN

PWMSNN

Portland

Wed 15/4

06:04-10:15

2 stops23h 11m

Shannon

Sat 25/4

12:30-17:32

2 stops34h 02m

€696

PortlandShannon

PWM - SNN

PWMSNN

Portland

Wed 15/4

19:12-10:15

1 stop10h 03m

Shannon

Sat 25/4

12:30-18:40

1 stop11h 10m

€697

PortlandShannon

PWM - SNN

PWMSNN

Portland

Thu 30/7

15:15-16:10

3 stops19h 55m

Shannon

Mon 10/8

07:30-23:30

3 stops21h 00m

€1,773

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

20h 30m

Direct flights

None
The fastest flight from Portland, Maine to Shannon, Clare takes 20h 30m
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. 20h 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.

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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