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Cheap flights from Portland, Maine to Shannon from €475

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 8/9. 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 (PWM-SNN)

Cheap return flights

United Airlines Logo
17:41 - 10:15PWM-SNN
11h 34m1 stop
United Airlines Logo
12:30 - 18:23SNN-PWM
10h 53m1 stop
€550United Airlines
Find Deal
Wed, 15 Oct - Wed, 22 Oct
United Airlines Logo
17:41 - 10:15PWM-SNN
11h 34m1 stop
United Airlines Logo
12:30 - 21:44SNN-PWM
38h 14m2 stops
€565United Airlines
Find Deal
Wed, 15 Oct - Wed, 22 Oct
American Airlines Logo
15:56 - 11:20PWM-SNN
14h 24m2 stops
American Airlines Logo
21:15 - 17:39SNN-PWM
25h 24m2 stops
€607American Airlines
Find Deal
Mon, 15 Sep - Tue, 23 Sep
United Airlines Logo
14:14 - 10:15PWM-SNN
15h 01m2 stops
United Airlines Logo
09:30 - 21:59SNN-PWM
17h 29m1 stop
€643United Airlines
Find Deal
Mon, 15 Sep - Tue, 23 Sep
American Airlines Logo
06:00 - 16:45PWM-SNN
29h 45m2 stops
American Airlines Logo
14:45 - 11:50SNN-PWM
26h 05m2 stops
€650American Airlines
Find Deal
Wed, 12 Nov - Sun, 16 Nov
American Airlines Logo
16:15 - 11:20PWM-SNN
14h 05m2 stops
American Airlines Logo
07:40 - 22:48SNN-PWM
20h 08m2 stops
€652American Airlines
Find Deal
Wed, 15 Oct - Wed, 22 Oct
American Airlines Logo
15:52 - 11:30PWM-SNN
14h 38m2 stops
American Airlines Logo
14:00 - 23:59SNN-PWM
14h 59m2 stops
€676American Airlines
Find Deal
Wed, 12 Nov - Sun, 16 Nov
Air Canada Logo
15:45 - 16:10PWM-SNN
19h 25m3 stops
Air Canada Logo
07:40 - 23:13SNN-PWM
20h 33m3 stops
€877Air Canada
Find Deal
Wed, 15 Oct - Wed, 22 Oct
Air Canada Logo
15:11 - 16:10PWM-SNN
19h 59m3 stops
Air Canada Logo
07:40 - 23:03SNN-PWM
20h 23m3 stops
€956Air Canada
Find Deal
Mon, 15 Sep - Tue, 23 Sep
JetBlue Logo
07:09 - 05:55PWM-SNN
17h 46m1 stop
JetBlue Logo
14:35 - 13:22SNN-PWM
27h 47m1 stop
€1,244JetBlue
Find Deal
Mon, 15 Sep - Tue, 23 Sep

United Airlines flights from Portland, Maine to Shannon, Clare

Our best United Airlines deals on Portland, Maine to Shannon, Clare flight tickets
United Airlines
15 Oct
PWM17:41Portland
11h 34m
1 stop
SNN10:15Shannon
22 Oct
SNN12:30Shannon
10h 53m
1 stop
PWM18:23Portland
€550
Find similar
United Airlines
15 Oct
PWM17:41Portland
11h 34m
1 stop
SNN10:15Shannon
22 Oct
SNN12:30Shannon
38h 14m
2 stops
PWM21:44Portland
€565
Find similar
United Airlines
15 Sept
PWM14:14Portland
15h 01m
2 stops
SNN10:15Shannon
23 Sept
SNN09:30Shannon
17h 29m
1 stop
PWM21:59Portland
€643
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
15 Sept
PWM15:56Portland
14h 24m
2 stops
SNN11:20Shannon
23 Sept
SNN21:15Shannon
25h 24m
2 stops
PWM17:39Portland
€607
Find similar
American Airlines
12 Nov
PWM06:00Portland
29h 45m
2 stops
SNN16:45Shannon
16 Nov
SNN14:45Shannon
26h 05m
2 stops
PWM11:50Portland
€650
Find similar
American Airlines
15 Oct
PWM16:15Portland
14h 05m
2 stops
SNN11:20Shannon
22 Oct
SNN07:40Shannon
20h 08m
2 stops
PWM22:48Portland
€652
Find similar

momondo Fare Finder

 
Customise 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 13,528 searches. Data last updated 2 September 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 15/10

17:41-10:15

1 stop11h 34m

Shannon

Wed 22/10

12:30-18:23

1 stop10h 53m

€550

PortlandShannon

PWM - SNN

PWMSNN

Portland

Wed 15/10

17:41-10:15

1 stop11h 34m

Shannon

Wed 22/10

12:30-21:44

2 stops38h 14m

€565

PortlandShannon

PWM - SNN

PWMSNN

Portland

Mon 15/9

15:56-11:20

2 stops14h 24m

Shannon

Tue 23/9

21:15-17:39

2 stops25h 24m

€607

PortlandShannon

PWM - SNN

PWMSNN

Portland

Mon 15/9

14:14-10:15

2 stops15h 01m

Shannon

Tue 23/9

09:30-21:59

1 stop17h 29m

€643

PortlandShannon

PWM - SNN

PWMSNN

Portland

Wed 12/11

06:00-16:45

2 stops29h 45m

Shannon

Sun 16/11

14:45-11:50

2 stops26h 05m

€650

PortlandShannon

PWM - SNN

PWMSNN

Portland

Wed 15/10

16:15-11:20

2 stops14h 05m

Shannon

Wed 22/10

07:40-22:48

2 stops20h 08m

€652

PortlandShannon

PWM - SNN

PWMSNN

Portland

Wed 12/11

15:52-11:30

2 stops14h 38m

Shannon

Sun 16/11

14:00-23:59

2 stops14h 59m

€676

PortlandShannon

PWM - SNN

PWMSNN

Portland

Wed 15/10

15:45-16:10

3 stops19h 25m

Shannon

Wed 22/10

07:40-23:13

3 stops20h 33m

€877

PortlandShannon

PWM - SNN

PWMSNN

Portland

Mon 15/9

15:11-16:10

3 stops19h 59m

Shannon

Tue 23/9

07:40-23:03

3 stops20h 23m

€956

PortlandShannon

PWM - SNN

PWMSNN

Portland

Mon 15/9

07:09-05:55

1 stop17h 46m

Shannon

Tue 23/9

14:35-13:22

1 stop27h 47m

€1,244

Flights are sorted by cheapest return flights first.

Showing 1-10 of 13 resultsSorted by cheapest first
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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?

American Airlines, KLM, and JetBlue are the most popular carriers operating from Portland to Shannon

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 return 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.
Search flight deals

  • How far is Portland to Shannon by plane?

    The distance between Portland and Shannon is about 4512.9 km. 11h 34m is a normal flight duration for this route.

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

    Prices for flights from Portland Airport to Shannon Airport were last updated today.

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

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and stopovers. 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 licence 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.

Travelling to a place near Shannon?

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

Why use momondo?

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

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Shannon from Portland.

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

Flights from Portland to Shannon with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Shannon from Portland.

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

Of course. momondo tracks the price of Portland to Shannon flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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