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Cheap flights from Portland, Maine to Shannon from $751

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 5/1. 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 round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
7:45 pm - 10:15 am
PWM
-
SNN
9h 30m1 stop
United Airlines Logo
12:30 pm - 6:13 pm
SNN
-
PWM
10h 43m1 stop
$751United Airlines
Fri, May 1 - Thu, May 21
United Airlines Logo
2:25 pm - 10:15 am
PWM
-
SNN
14h 50m2 stops
United Airlines Logo
12:30 pm - 6:13 pm
SNN
-
PWM
10h 43m1 stop
$756United Airlines
Fri, May 1 - Thu, May 21
American Airlines Logo
1:15 pm - 11:20 am
PWM
-
SNN
17h 05m2 stops
American Airlines Logo
7:40 am - 10:27 pm
SNN
-
PWM
19h 47m2 stops
$812American Airlines
Wed, Apr 15 - Sat, Apr 25
United Airlines Logo
6:00 am - 7:30 am
PWM
-
SNN
20h 30m1 stop
United Airlines Logo
12:30 pm - 6:13 pm
SNN
-
PWM
10h 43m1 stop
$846United Airlines
Mon, May 25 - Fri, Jun 12
United Airlines Logo
2:45 pm - 10:15 am
PWM
-
SNN
14h 30m2 stops
United Airlines Logo
9:30 am - 7:24 pm
SNN
-
PWM
14h 54m2 stops
$851United Airlines
Mon, May 25 - Fri, Jun 12
United Airlines Logo
7:37 pm - 10:15 am
PWM
-
SNN
9h 38m1 stop
United Airlines Logo
12:30 pm - 6:47 pm
SNN
-
PWM
11h 17m1 stop
$876United Airlines
Wed, Apr 15 - Sat, Apr 25
United Airlines Logo
8:58 am - 10:15 am
PWM
-
SNN
20h 17m2 stops
United Airlines Logo
12:30 pm - 6:47 pm
SNN
-
PWM
11h 17m1 stop
$881United Airlines
Wed, Apr 15 - Sat, Apr 25
American Airlines Logo
4:12 pm - 11:20 am
PWM
-
SNN
14h 08m2 stops
American Airlines Logo
7:40 am - 10:27 pm
SNN
-
PWM
19h 47m2 stops
$888American Airlines
Wed, Apr 15 - Sat, Apr 25
United Airlines Logo
7:37 pm - 10:15 am
PWM
-
SNN
9h 38m1 stop
United Airlines Logo
12:30 pm - 6:47 pm
SNN
-
PWM
11h 17m1 stop
$906United Airlines
Wed, Apr 15 - Sat, Apr 25
United Airlines Logo
8:58 am - 10:15 am
PWM
-
SNN
20h 17m2 stops
United Airlines Logo
12:30 pm - 6:47 pm
SNN
-
PWM
11h 17m1 stop
$911United Airlines
Wed, Apr 15 - Sat, Apr 25

United Airlines flights from Portland, Maine to Shannon, Clare

Our best United Airlines deals on Portland, Maine to Shannon, Clare flight tickets
United Airlines
May 1
PWM7:45 pmPortland
9h 30m
1 stop
SNN10:15 amShannon
May 21
SNN12:30 pmShannon
10h 43m
1 stop
PWM6:13 pmPortland
$751
Find similar
United Airlines
May 1
PWM2:25 pmPortland
14h 50m
2 stops
SNN10:15 amShannon
May 21
SNN12:30 pmShannon
10h 43m
1 stop
PWM6:13 pmPortland
$756
Find similar
United Airlines
May 25
PWM6:00 amPortland
20h 30m
1 stop
SNN7:30 amShannon
Jun 12
SNN12:30 pmShannon
10h 43m
1 stop
PWM6:13 pmPortland
$846
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
Apr 15
PWM4:12 pmPortland
18h 58m
2 stops
SNN4:10 pmShannon
Apr 25
SNN7:40 amShannon
19h 47m
2 stops
PWM10:27 pmPortland
$812
Find similar
American Airlines
Apr 15
PWM4:12 pmPortland
14h 08m
2 stops
SNN11:20 amShannon
Apr 25
SNN7:40 amShannon
19h 47m
2 stops
PWM10:27 pmPortland
$888
Find similar

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 December 14, 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

Fri 5/1

7:45 pm-10:15 am

1 stop9h 30m

Shannon

Thu 5/21

12:30 pm-6:13 pm

1 stop10h 43m

$751

PortlandShannon

PWM - SNN

PWMSNN

Portland

Fri 5/1

2:25 pm-10:15 am

2 stops14h 50m

Shannon

Thu 5/21

12:30 pm-6:13 pm

1 stop10h 43m

$756

PortlandShannon

PWM - SNN

PWMSNN

Portland

Wed 4/15

1:15 pm-11:20 am

2 stops17h 05m

Shannon

Sat 4/25

7:40 am-10:27 pm

2 stops19h 47m

$812

PortlandShannon

PWM - SNN

PWMSNN

Portland

Mon 5/25

6:00 am-7:30 am

1 stop20h 30m

Shannon

Fri 6/12

12:30 pm-6:13 pm

1 stop10h 43m

$846

PortlandShannon

PWM - SNN

PWMSNN

Portland

Mon 5/25

2:45 pm-10:15 am

2 stops14h 30m

Shannon

Fri 6/12

9:30 am-7:24 pm

2 stops14h 54m

$851

PortlandShannon

PWM - SNN

PWMSNN

Portland

Wed 4/15

7:37 pm-10:15 am

1 stop9h 38m

Shannon

Sat 4/25

12:30 pm-6:47 pm

1 stop11h 17m

$876

PortlandShannon

PWM - SNN

PWMSNN

Portland

Wed 4/15

8:58 am-10:15 am

2 stops20h 17m

Shannon

Sat 4/25

12:30 pm-6:47 pm

1 stop11h 17m

$881

PortlandShannon

PWM - SNN

PWMSNN

Portland

Wed 4/15

4:12 pm-11:20 am

2 stops14h 08m

Shannon

Sat 4/25

7:40 am-10:27 pm

2 stops19h 47m

$888

PortlandShannon

PWM - SNN

PWMSNN

Portland

Wed 4/15

7:37 pm-10:15 am

1 stop9h 38m

Shannon

Sat 4/25

12:30 pm-6:47 pm

1 stop11h 17m

$906

PortlandShannon

PWM - SNN

PWMSNN

Portland

Wed 4/15

8:58 am-10:15 am

2 stops20h 17m

Shannon

Sat 4/25

12:30 pm-6:47 pm

1 stop11h 17m

$911

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 is the cheapest day to depart on your flight to Shannon, Clare?

The cheapest day to depart from Portland, Maine to Shannon, Clare is on a Wednesday when prices can be found for as low as $662. The most expensive day to fly to Shannon, Clare is Thursday, with ticket prices averaging around $787.

What is the cheapest time of day to depart on your flight to Shannon, Clare?

Our data shows that the cheapest Portland, Maine to Shannon, Clare flights are usually those with departure times in the evening. Our users have found flights to Shannon, Clare in the evening for as low as $578. Flights in the morning are often more expensive with an average ticket price of $833.

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

9h 30m

Direct flights

None
The fastest flight from Portland, Maine to Shannon, Clare takes 9h 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 straight-line distance from Portland to Shannon is 2804.2 mi. A reasonable flight in good conditions will take 9h 30m.

  • 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
Adare
Bunratty
Ennis
Nenagh
Lahinch

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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