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Cheap flights from Portland, Maine to Shannon from $658

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Portland, Maine to Shannon departing on 8/22. 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
1 adult, Economy, 0 bags

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Find the cheapest flights from Portland, Maine to Shannon

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
8:15 pm - 10:15 am
PWM
-
SNN
9h 00m
1 stop
United Airlines Logo
9:30 am - 5:44 pm
SNN
-
PWM
13h 14m
1 stop
$658United Airlines
Sat, Aug 22 - Wed, Aug 26
United Airlines Logo
6:00 am - 7:30 am
PWM
-
SNN
20h 30m
1 stop
United Airlines Logo
9:30 am - 11:31 pm
SNN
-
PWM
19h 01m
2 stops
$662United Airlines
Sat, Aug 22 - Wed, Aug 26
United Airlines Logo
12:00 pm - 7:30 am
PWM
-
SNN
14h 30m
1 stop
United Airlines Logo
9:30 am - 10:01 pm
SNN
-
PWM
17h 31m
1 stop
$708United Airlines
Mon, Aug 24 - Wed, Aug 26
United Airlines Logo
2:35 pm - 10:15 am
PWM
-
SNN
14h 40m
2 stops
United Airlines Logo
9:30 am - 11:59 pm
SNN
-
PWM
19h 29m
2 stops
$713United Airlines
Mon, Aug 24 - Wed, Aug 26
United Airlines Logo
6:00 am - 7:30 am
PWM
-
SNN
20h 30m
1 stop
United Airlines Logo
9:30 am - 5:44 pm
SNN
-
PWM
13h 14m
1 stop
$719United Airlines
Thu, Jul 16 - Tue, Jul 28
United Airlines Logo
5:15 am - 7:30 am
PWM
-
SNN
21h 15m
2 stops
United Airlines Logo
9:30 am - 11:51 pm
SNN
-
PWM
19h 21m
2 stops
$724United Airlines
Thu, Jul 16 - Tue, Jul 28
United Airlines Logo
7:50 pm - 10:15 am
PWM
-
SNN
9h 25m
1 stop
United Airlines Logo
12:30 pm - 6:23 pm
SNN
-
PWM
10h 53m
1 stop
$739United Airlines
Fri, May 8 - Fri, May 15
United Airlines Logo
7:10 pm - 10:15 am
PWM
-
SNN
34h 05m
2 stops
United Airlines Logo
12:30 pm - 10:23 am
SNN
-
PWM
26h 53m
2 stops
$744United Airlines
Fri, May 8 - Fri, May 15
United Airlines Logo
8:16 pm - 10:15 am
PWM
-
SNN
8h 59m
1 stop
United Airlines Logo
9:30 am - 9:42 pm
SNN
-
PWM
17h 12m
1 stop
$769United Airlines
Thu, Jul 16 - Tue, Jul 28
United Airlines Logo
9:55 am - 7:30 am
PWM
-
SNN
16h 35m
2 stops
United Airlines Logo
9:30 am - 5:44 pm
SNN
-
PWM
13h 14m
1 stop
$774United Airlines
Thu, Jul 16 - Tue, Jul 28

United Airlines flights from Portland, Maine to Shannon, Clare

Our best United Airlines deals on Portland, Maine to Shannon, Clare flight tickets
United Airlines
Aug 22
PWM8:15 pmPortland
9h 00m
1 stop
SNN10:15 amShannon
Aug 26
SNN9:30 amShannon
13h 14m
1 stop
PWM5:44 pmPortland
$658
United Airlines
Aug 22
PWM6:00 amPortland
20h 30m
1 stop
SNN7:30 amShannon
Aug 26
SNN9:30 amShannon
19h 01m
2 stops
PWM11:31 pmPortland
$662
United Airlines
Aug 24
PWM12:00 pmPortland
14h 30m
1 stop
SNN7:30 amShannon
Aug 26
SNN9:30 amShannon
17h 31m
1 stop
PWM10:01 pmPortland
$708

Air Canada flights from Portland, Maine to Shannon, Clare

Our best Air Canada deals on Portland, Maine to Shannon, Clare flight tickets
Air Canada
Jul 16
PWM10:55 amPortland
19h 25m
3 stops
SNN11:20 amShannon
Jul 28
SNN7:30 amShannon
21h 00m
3 stops
PWM11:30 pmPortland
$1,086
Air Canada
Jul 16
PWM10:55 amPortland
19h 25m
3 stops
SNN11:20 amShannon
Jul 28
SNN7:30 amShannon
21h 00m
3 stops
PWM11:30 pmPortland
$1,146
Air Canada
Jun 1
PWM3:16 pmPortland
19h 54m
3 stops
SNN4:10 pmShannon
Jun 6
SNN7:30 amShannon
21h 00m
3 stops
PWM11:30 pmPortland
$1,337

momondo Fare Finder

 
Customize 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 832,500 searches. Data last updated March 27, 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

Cheapest round-trip

PortlandShannon

PWM - SNN

PWMSNN

Portland

Sat 8/22

8:15 pm-10:15 am

1 stop9h 00m

Shannon

Wed 8/26

9:30 am-5:44 pm

1 stop13h 14m

$658

PortlandShannon

PWM - SNN

PWMSNN

Portland

Sat 8/22

6:00 am-7:30 am

1 stop20h 30m

Shannon

Wed 8/26

9:30 am-11:31 pm

2 stops19h 01m

$662

PortlandShannon

PWM - SNN

PWMSNN

Portland

Mon 8/24

12:00 pm-7:30 am

1 stop14h 30m

Shannon

Wed 8/26

9:30 am-10:01 pm

1 stop17h 31m

$708

PortlandShannon

PWM - SNN

PWMSNN

Portland

Mon 8/24

2:35 pm-10:15 am

2 stops14h 40m

Shannon

Wed 8/26

9:30 am-11:59 pm

2 stops19h 29m

$713

PortlandShannon

PWM - SNN

PWMSNN

Portland

Thu 7/16

6:00 am-7:30 am

1 stop20h 30m

Shannon

Tue 7/28

9:30 am-5:44 pm

1 stop13h 14m

$719

PortlandShannon

PWM - SNN

PWMSNN

Portland

Thu 7/16

5:15 am-7:30 am

2 stops21h 15m

Shannon

Tue 7/28

9:30 am-11:51 pm

2 stops19h 21m

$724
Quickest round-trip

PortlandShannon

PWM - SNN

PWMSNN

Portland

Fri 5/8

7:50 pm-10:15 am

1 stop9h 25m

Shannon

Fri 5/15

12:30 pm-6:23 pm

1 stop10h 53m

$739

PortlandShannon

PWM - SNN

PWMSNN

Portland

Fri 5/8

7:10 pm-10:15 am

2 stops34h 05m

Shannon

Fri 5/15

12:30 pm-10:23 am

2 stops26h 53m

$744

PortlandShannon

PWM - SNN

PWMSNN

Portland

Thu 7/16

8:16 pm-10:15 am

1 stop8h 59m

Shannon

Tue 7/28

9:30 am-9:42 pm

1 stop17h 12m

$769

PortlandShannon

PWM - SNN

PWMSNN

Portland

Thu 7/16

9:55 am-7:30 am

2 stops16h 35m

Shannon

Tue 7/28

9:30 am-5:44 pm

1 stop13h 14m

$774

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

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 airlines fly to Shannon, Clare?

Aer Lingus, American Airlines and United Airlines are the top three most popular airlines that fly to Shannon, Clare from Portland, Maine according to our data. Aer Lingus is the first choice among our users, with 80% of people opting to fly with this airline when traveling to Shannon, Clare. Keep in mind that there are 7 different airlines that fly to Shannon, Clare on a routine basis, so you have a few additional options to choose from.

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 round-trip 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

8h 59m

Direct flights

None
The fastest flight from Portland, Maine to Shannon, Clare takes 8h 59m
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 straight-line distance from Portland to Shannon is 2804.2 mi. A reasonable flight in good conditions will take 8h 59m.

  • When did momondo last update prices for flights from Portland Airport to Shannon Airport?

    Prices for flights from Portland Airport to Shannon Airport refresh daily.

  • How old do you have to be to fly from Portland Airport to Shannon Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. 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 license 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.

Traveling to a place near Shannon?

Book flights to Shannon if you plan to visit one of these locations
Limerick
Bunratty
Ennis
Adare
Lahinch
Nenagh

Why use momondo?

Why should I use momondo to find a flight deal from Portland to Shannon?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Portland to Shannon for you.

Can I find flights from Portland to Shannon with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Shannon from Portland with this policy.

How can momondo help me find flights from Portland to Shannon?

momondo helps you find the best flight between Portland and Shannon by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from Portland to Shannon right now. Can momondo alert me if prices change?

Price alerts on flights to Shannon from Portland are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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