Latest deals
Insights
When to book
FAQs
Price Alerts

Cheap flights from Portland, Maine to Shannon from $487

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 2/24. 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

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Find the cheapest flights from Portland, Maine to Shannon

Cheap round-trip flights

Enter your travel dates to find the best prices.
American Airlines Logo
5:40 pm - 4:45 pm
PWM
-
SNN
18h 05m
2 stops
American Airlines Logo
7:50 am - 10:30 pm
SNN
-
PWM
19h 40m
2 stops
$487American Airlines
Tue, Feb 24 - Tue, Mar 3
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
$489United Airlines
Fri, May 1 - Tue, May 12
United Airlines Logo
4:45 pm - 10:15 am
PWM
-
SNN
36h 30m
2 stops
United Airlines Logo
12:30 pm - 6:23 pm
SNN
-
PWM
10h 53m
1 stop
$504United Airlines
Fri, May 1 - Tue, May 12
American Airlines Logo
12:29 pm - 11:30 am
PWM
-
SNN
18h 01m
2 stops
American Airlines Logo
2:00 pm - 11:50 pm
SNN
-
PWM
14h 50m
2 stops
$684American Airlines
Wed, Feb 25 - Wed, Mar 4
American Airlines Logo
12:29 pm - 11:30 am
PWM
-
SNN
18h 01m
2 stops
American Airlines Logo
2:45 pm - 10:40 am
SNN
-
PWM
24h 55m
2 stops
$696American Airlines
Mon, Feb 23 - Fri, Feb 27
Air Canada Logo
6:00 am - 11:30 am
PWM
-
SNN
24h 30m
3 stops
Air Canada Logo
7:50 am - 11:20 pm
SNN
-
PWM
20h 30m
3 stops
$698Air Canada
Mon, Feb 23 - Fri, Feb 27
American Airlines Logo
6:00 am - 5:25 am
PWM
-
SNN
18h 25m
2 stops
American Airlines Logo
7:30 am - 6:58 pm
SNN
-
PWM
16h 28m
2 stops
$700American Airlines
Fri, May 1 - Tue, May 12
Air Canada Logo
6:00 am - 11:30 am
PWM
-
SNN
24h 30m
3 stops
Air Canada Logo
7:50 am - 11:20 pm
SNN
-
PWM
20h 30m
3 stops
$703Air Canada
Tue, Feb 24 - Tue, Mar 3
American Airlines Logo
5:40 pm - 4:45 pm
PWM
-
SNN
18h 05m
2 stops
American Airlines Logo
2:45 pm - 10:40 am
SNN
-
PWM
24h 55m
2 stops
$706American Airlines
Sun, Feb 22 - Fri, Feb 27
United Airlines Logo
7:12 pm - 10:15 am
PWM
-
SNN
10h 03m
1 stop
United Airlines Logo
12:30 pm - 6:40 pm
SNN
-
PWM
11h 10m
1 stop
$821United Airlines
Wed, Apr 15 - Sat, Apr 25

American Airlines flights from Portland, Maine to Shannon, Clare

Our best American Airlines deals on Portland, Maine to Shannon, Clare flight tickets
American Airlines
Feb 24
PWM5:40 pmPortland
18h 05m
2 stops
SNN4:45 pmShannon
Mar 3
SNN7:50 amShannon
19h 40m
2 stops
PWM10:30 pmPortland
$487
American Airlines
Feb 25
PWM12:29 pmPortland
18h 01m
2 stops
SNN11:30 amShannon
Mar 4
SNN2:00 pmShannon
14h 50m
2 stops
PWM11:50 pmPortland
$684
American Airlines
Feb 23
PWM12:29 pmPortland
18h 01m
2 stops
SNN11:30 amShannon
Feb 27
SNN2:45 pmShannon
24h 55m
2 stops
PWM10:40 amPortland
$696

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
PWM7:50 pmPortland
9h 25m
1 stop
SNN10:15 amShannon
May 12
SNN12:30 pmShannon
10h 53m
1 stop
PWM6:23 pmPortland
$489
United Airlines
May 1
PWM4:45 pmPortland
36h 30m
2 stops
SNN10:15 amShannon
May 12
SNN12:30 pmShannon
10h 53m
1 stop
PWM6:23 pmPortland
$504
United Airlines
Apr 15
PWM7:12 pmPortland
10h 03m
1 stop
SNN10:15 amShannon
Apr 25
SNN12:30 pmShannon
11h 10m
1 stop
PWM6:40 pmPortland
$821

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 January 29, 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

Tue 2/24

5:40 pm-4:45 pm

2 stops18h 05m

Shannon

Tue 3/3

7:50 am-10:30 pm

2 stops19h 40m

$487

PortlandShannon

PWM - SNN

PWMSNN

Portland

Fri 5/1

7:50 pm-10:15 am

1 stop9h 25m

Shannon

Tue 5/12

12:30 pm-6:23 pm

1 stop10h 53m

$489

PortlandShannon

PWM - SNN

PWMSNN

Portland

Fri 5/1

4:45 pm-10:15 am

2 stops36h 30m

Shannon

Tue 5/12

12:30 pm-6:23 pm

1 stop10h 53m

$504

PortlandShannon

PWM - SNN

PWMSNN

Portland

Wed 2/25

12:29 pm-11:30 am

2 stops18h 01m

Shannon

Wed 3/4

2:00 pm-11:50 pm

2 stops14h 50m

$684

PortlandShannon

PWM - SNN

PWMSNN

Portland

Mon 2/23

12:29 pm-11:30 am

2 stops18h 01m

Shannon

Fri 2/27

2:45 pm-10:40 am

2 stops24h 55m

$696

PortlandShannon

PWM - SNN

PWMSNN

Portland

Mon 2/23

6:00 am-11:30 am

3 stops24h 30m

Shannon

Fri 2/27

7:50 am-11:20 pm

3 stops20h 30m

$698

PortlandShannon

PWM - SNN

PWMSNN

Portland

Fri 5/1

6:00 am-5:25 am

2 stops18h 25m

Shannon

Tue 5/12

7:30 am-6:58 pm

2 stops16h 28m

$700

PortlandShannon

PWM - SNN

PWMSNN

Portland

Tue 2/24

6:00 am-11:30 am

3 stops24h 30m

Shannon

Tue 3/3

7:50 am-11:20 pm

3 stops20h 30m

$703

PortlandShannon

PWM - SNN

PWMSNN

Portland

Sun 2/22

5:40 pm-4:45 pm

2 stops18h 05m

Shannon

Fri 2/27

2:45 pm-10:40 am

2 stops24h 55m

$706

PortlandShannon

PWM - SNN

PWMSNN

Portland

Wed 4/15

7:12 pm-10:15 am

1 stop10h 03m

Shannon

Sat 4/25

12:30 pm-6:40 pm

1 stop11h 10m

$821

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 82% 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

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 straight-line distance from Portland to Shannon is 2804.2 mi. A reasonable flight in good conditions will take 9h 25m.

  • 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
Adare
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.

An easier way to manage your Shannon, Clare trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Sat 2/28
Sat 3/7
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Ireland