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Cheap flights from Portland, Maine to Shannon from $606

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 4/15. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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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 amPWM-SNN
9h 30m1 stop
United Airlines Logo
12:30 pm - 6:20 pmSNN-PWM
10h 50m1 stop
$606United Airlines
Find Deal
Wed, Apr 15 - Sat, Apr 25
United Airlines Logo
11:50 am - 10:15 amPWM-SNN
17h 25m2 stops
United Airlines Logo
12:30 pm - 6:20 pmSNN-PWM
10h 50m1 stop
$611United Airlines
Find Deal
Wed, Apr 15 - Sat, Apr 25
American Airlines Logo
12:38 pm - 4:45 pmPWM-SNN
23h 07m2 stops
American Airlines Logo
2:45 pm - 11:46 amSNN-PWM
26h 01m2 stops
$801American Airlines
Find Deal
Wed, Nov 12 - Sun, Nov 16
American Airlines Logo
6:00 am - 11:30 amPWM-SNN
24h 30m2 stops
American Airlines Logo
2:45 pm - 3:11 pmSNN-PWM
53h 26m2 stops
$814American Airlines
Find Deal
Wed, Nov 12 - Sun, Nov 16
American Airlines Logo
1:15 pm - 11:20 amPWM-SNN
17h 05m2 stops
American Airlines Logo
7:40 am - 10:27 pmSNN-PWM
19h 47m2 stops
$889American Airlines
Find Deal
Wed, Apr 15 - Sat, Apr 25
Air Canada Logo
11:17 am - 11:20 amPWM-SNN
19h 03m3 stops
Air Canada Logo
5:30 pm - 6:20 pmSNN-PWM
29h 50m3 stops
$1,780Air Canada
Find Deal
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
Apr 15
PWM7:45 pmPortland
9h 30m
1 stop
SNN10:15 amShannon
Apr 25
SNN12:30 pmShannon
10h 50m
1 stop
PWM6:20 pmPortland
$606
Find similar
United Airlines
Apr 15
PWM11:50 amPortland
17h 25m
2 stops
SNN10:15 amShannon
Apr 25
SNN12:30 pmShannon
10h 50m
1 stop
PWM6:20 pmPortland
$611
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
Nov 12
PWM12:38 pmPortland
23h 07m
2 stops
SNN4:45 pmShannon
Nov 16
SNN2:45 pmShannon
26h 01m
2 stops
PWM11:46 amPortland
$801
Find similar
American Airlines
Nov 12
PWM6:00 amPortland
24h 30m
2 stops
SNN11:30 amShannon
Nov 16
SNN2:45 pmShannon
53h 26m
2 stops
PWM3:11 pmPortland
$814
Find similar
American Airlines
Apr 15
PWM1:15 pmPortland
17h 05m
2 stops
SNN11:20 amShannon
Apr 25
SNN7:40 amShannon
19h 47m
2 stops
PWM10:27 pmPortland
$889
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 October 30, 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

Wed 4/15

7:45 pm-10:15 am

1 stop9h 30m

Shannon

Sat 4/25

12:30 pm-6:20 pm

1 stop10h 50m

$606

PortlandShannon

PWM - SNN

PWMSNN

Portland

Wed 4/15

11:50 am-10:15 am

2 stops17h 25m

Shannon

Sat 4/25

12:30 pm-6:20 pm

1 stop10h 50m

$611

PortlandShannon

PWM - SNN

PWMSNN

Portland

Wed 11/12

12:38 pm-4:45 pm

2 stops23h 07m

Shannon

Sun 11/16

2:45 pm-11:46 am

2 stops26h 01m

$801

PortlandShannon

PWM - SNN

PWMSNN

Portland

Wed 11/12

6:00 am-11:30 am

2 stops24h 30m

Shannon

Sun 11/16

2:45 pm-3:11 pm

2 stops53h 26m

$814

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

$889

PortlandShannon

PWM - SNN

PWMSNN

Portland

Wed 4/15

11:17 am-11:20 am

3 stops19h 03m

Shannon

Sat 4/25

5:30 pm-6:20 pm

3 stops29h 50m

$1,780

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 JetBlue 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

Direct flights

None
There are no direct flights from Portland, Maine to Shannon, Clare. There are no popular flight routes from Portland, Maine to Shannon, Clare.
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  • 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
Lahinch
Ennis
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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