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Cheap flights from Portland, Maine to Shannon from $510

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 8/13. 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

Discover deals from 900+ travel sites with momondo.

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
3:45 pm - 10:15 am
PWM
-
SNN
13h 30m
1 stop
United Airlines Logo
9:30 am - 5:42 pm
SNN
-
PWM
13h 12m
1 stop
$709United Airlines
Wed, Aug 19 - Wed, Aug 26
United Airlines Logo
5:15 am - 10:15 am
PWM
-
SNN
24h 00m
2 stops
United Airlines Logo
9:30 am - 7:24 pm
SNN
-
PWM
14h 54m
2 stops
$713United Airlines
Wed, Aug 19 - Wed, Aug 26
United Airlines Logo
6:00 am - 7:30 am
PWM
-
SNN
20h 30m
1 stop
United Airlines Logo
9:30 am - 9:23 pm
SNN
-
PWM
16h 53m
1 stop
$739United Airlines
Thu, Aug 6 - Thu, Aug 13
United Airlines Logo
6:00 am - 7:30 am
PWM
-
SNN
20h 30m
1 stop
United Airlines Logo
12:30 pm - 11:59 pm
SNN
-
PWM
16h 29m
2 stops
$743United Airlines
Thu, Aug 6 - Thu, Aug 13
United Airlines Logo
5:15 am - 10:15 am
PWM
-
SNN
24h 00m
2 stops
United Airlines Logo
9:30 am - 11:59 pm
SNN
-
PWM
19h 29m
2 stops
$754United Airlines
Thu, Aug 13 - Mon, Aug 17
United Airlines Logo
8:16 pm - 10:15 am
PWM
-
SNN
8h 59m
1 stop
United Airlines Logo
12:30 pm - 11:30 pm
SNN
-
PWM
16h 00m
1 stop
$769United Airlines
Thu, Jul 30 - Mon, Aug 10
United Airlines Logo
6:00 am - 7:30 am
PWM
-
SNN
20h 30m
2 stops
United Airlines Logo
12:30 pm - 11:30 pm
SNN
-
PWM
16h 00m
1 stop
$773United Airlines
Thu, Jul 30 - Mon, Aug 10
United Airlines Logo
5:15 am - 10:15 am
PWM
-
SNN
24h 00m
2 stops
United Airlines Logo
12:30 pm - 10:04 am
SNN
-
PWM
26h 34m
2 stops
$784United Airlines
Thu, Jul 30 - Mon, Aug 10
Delta Logo
2:59 pm - 11:10 am
PWM
-
SNN
15h 11m
1 stop
Delta Logo
1:05 pm - 12:59 am
SNN
-
PWM
16h 54m
1 stop
$847Delta
Thu, Jul 30 - Mon, Aug 10
Delta Logo
2:59 pm - 11:10 am
PWM
-
SNN
15h 11m
1 stop
Delta Logo
1:05 pm - 12:59 am
SNN
-
PWM
16h 54m
1 stop
$848Delta
Thu, Jul 30 - Mon, Aug 10

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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
PWM10:45 amPortland
18h 30m
1 stop
SNN10:15 amShannon
Aug 29
SNN9:30 amShannon
16h 53m
1 stop
PWM9:23 pmPortland
$709
United Airlines
Aug 22
PWM5:15 amPortland
21h 15m
2 stops
SNN7:30 amShannon
Aug 29
SNN9:30 amShannon
14h 47m
2 stops
PWM7:17 pmPortland
$713
United Airlines
Aug 6
PWM6:00 amPortland
20h 30m
1 stop
SNN7:30 amShannon
Aug 13
SNN9:30 amShannon
16h 53m
1 stop
PWM9:23 pmPortland
$739

Air Canada flights from Portland, Maine to Shannon, Clare

Our best Air Canada deals on Portland, Maine to Shannon, Clare flight tickets
Air Canada
Aug 22
PWM3:45 pmPortland
19h 20m
3 stops
SNN4:05 pmShannon
Aug 29
SNN7:30 amShannon
21h 02m
3 stops
PWM11:32 pmPortland
$1,173
Air Canada
Oct 8
PWM10:43 amPortland
19h 37m
3 stops
SNN11:20 amShannon
Oct 12
SNN7:30 amShannon
20h 58m
3 stops
PWM11:28 pmPortland
$1,631
Air Canada
Jul 30
PWM3:16 pmPortland
19h 54m
3 stops
SNN4:10 pmShannon
Aug 10
SNN7:30 amShannon
21h 00m
3 stops
PWM11:30 pmPortland
$1,744

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 July 10, 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

Wed 8/19

3:45 pm-10:15 am

1 stop13h 30m

Shannon

Wed 8/26

9:30 am-5:42 pm

1 stop13h 12m

$709

PortlandShannon

PWM - SNN

PWMSNN

Portland

Wed 8/19

5:15 am-10:15 am

2 stops24h 00m

Shannon

Wed 8/26

9:30 am-7:24 pm

2 stops14h 54m

$713

PortlandShannon

PWM - SNN

PWMSNN

Portland

Thu 8/6

6:00 am-7:30 am

1 stop20h 30m

Shannon

Thu 8/13

9:30 am-9:23 pm

1 stop16h 53m

$739

PortlandShannon

PWM - SNN

PWMSNN

Portland

Thu 8/6

6:00 am-7:30 am

1 stop20h 30m

Shannon

Thu 8/13

12:30 pm-11:59 pm

2 stops16h 29m

$743

PortlandShannon

PWM - SNN

PWMSNN

Portland

Thu 8/13

5:15 am-10:15 am

2 stops24h 00m

Shannon

Mon 8/17

9:30 am-11:59 pm

2 stops19h 29m

$754
Quickest round-trip

PortlandShannon

PWM - SNN

PWMSNN

Portland

Thu 7/30

8:16 pm-10:15 am

1 stop8h 59m

Shannon

Mon 8/10

12:30 pm-11:30 pm

1 stop16h 00m

$769

PortlandShannon

PWM - SNN

PWMSNN

Portland

Thu 7/30

6:00 am-7:30 am

2 stops20h 30m

Shannon

Mon 8/10

12:30 pm-11:30 pm

1 stop16h 00m

$773

PortlandShannon

PWM - SNN

PWMSNN

Portland

Thu 7/30

5:15 am-10:15 am

2 stops24h 00m

Shannon

Mon 8/10

12:30 pm-10:04 am

2 stops26h 34m

$784

PortlandShannon

PWM - SNN

PWMSNN

Portland

Thu 7/30

2:59 pm-11:10 am

1 stop15h 11m

Shannon

Mon 8/10

1:05 pm-12:59 am

1 stop16h 54m

$847

PortlandShannon

PWM - SNN

PWMSNN

Portland

Thu 7/30

2:59 pm-11:10 am

1 stop15h 11m

Shannon

Mon 8/10

1:05 pm-12:59 am

1 stop16h 54m

$848

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 13 resultsSorted by cheapest first
1
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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 and Air Canada are the most popular carriers operating from Portland to Shannon

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 81% of people opting to fly with this airline when traveling to Shannon, Clare. Keep in mind that there are 8 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

13h 44m

Direct flights

None
The fastest flight from Portland, Maine to Shannon, Clare takes 13h 44m
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

Frequently asked questions about flying from Portland, Maine to Shannon, Clare

  • 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 13h 44m.

  • 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 many operators does momondo search for flights from Portland Airport to Shannon Airport?

  • 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.

  • What is the most popular airline from Portland, Maine to Shannon, Clare?

Best airlines flying from Portland, Maine to Shannon, Clare

Compare and see reviews for airlines that fly from Portland, Maine to Shannon, Clare with momondo
Airline
Rating
Free Cancellation
Price
United AirlinesPriceFrom $606Free CancellationRating
7.4
9,966 reviews
Search United Airlines flights

Traveling to a place near Shannon?

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

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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