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Cheap flights from Portland to Shannon from $382

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 to Shannon departing on 10/26. 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 to Shannon

Cheap round-trip flights

American Airlines Logo
5:45 pm - 4:45 pmPDX-SNN
15h 00m1 stop
American Airlines Logo
7:50 am - 3:55 pmSNN-PDX
16h 05m1 stop
$485American Airlines
Find Deal
Sun, Mar 1 - Sun, Mar 8
American Airlines Logo
6:00 am - 11:30 amPDX-SNN
21h 30m2 stops
American Airlines Logo
7:50 am - 4:55 pmSNN-PDX
16h 05m1 stop
$489American Airlines
Find Deal
Thu, Mar 5 - Wed, Mar 11
American Airlines Logo
2:10 pm - 4:45 pmPDX-SNN
18h 35m2 stops
American Airlines Logo
7:50 am - 4:55 pmSNN-PDX
16h 05m1 stop
$490American Airlines
Find Deal
Thu, Mar 5 - Wed, Mar 11
American Airlines Logo
12:02 pm - 4:45 pmPDX-SNN
20h 43m2 stops
American Airlines Logo
7:50 am - 11:13 pmSNN-PDX
22h 23m2 stops
$500American Airlines
Find Deal
Thu, Mar 5 - Wed, Mar 11
Air Canada Logo
3:15 pm - 11:30 amPDX-SNN
36h 15m2 stops
Air Canada Logo
8:05 pm - 9:15 amSNN-PDX
45h 10m2 stops
$685Air Canada
Find Deal
Wed, Nov 12 - Sun, Nov 16
Air Canada Logo
3:15 pm - 4:45 pmPDX-SNN
17h 30m2 stops
Air Canada Logo
7:50 am - 9:15 amSNN-PDX
32h 25m3 stops
$691Air Canada
Find Deal
Thu, Mar 5 - Wed, Mar 11
Multiple Airlines Logo
3:15 pm - 4:45 pmPDX-SNN
17h 30m2 stops
Multiple Airlines Logo
7:50 am - 9:15 amSNN-PDX
32h 25m3 stops
$692Multiple Airlines
Find Deal
Thu, Mar 5 - Wed, Mar 11
Multiple Airlines Logo
7:11 am - 11:30 amPDX-SNN
20h 19m3 stops
Multiple Airlines Logo
7:50 am - 2:45 pmSNN-PDX
37h 55m2 stops
$696Multiple Airlines
Find Deal
Thu, Mar 5 - Wed, Mar 11
British Airways Logo
9:34 am - 11:30 amPDX-SNN
18h 56m2 stops
British Airways Logo
8:05 pm - 4:31 pmSNN-PDX
28h 26m2 stops
$4,185British Airways
Find Deal
Sat, Nov 1 - Fri, Nov 7
British Airways Logo
12:45 am - 11:30 amPDX-SNN
27h 45m2 stops
British Airways Logo
7:50 am - 3:55 pmSNN-PDX
16h 05m1 stop
$9,027British Airways
Find Deal
Sat, Nov 1 - Fri, Nov 7

Air Canada flights from Portland to Shannon, Clare

Our best Air Canada deals on Portland to Shannon, Clare flight tickets
Air Canada
Nov 12
PDX3:15 pmPortland
36h 15m
2 stops
SNN11:30 amShannon
Nov 16
SNN8:05 pmShannon
45h 10m
2 stops
PDX9:15 amPortland
$685
Find similar
Air Canada
Mar 5
PDX3:15 pmPortland
17h 30m
2 stops
SNN4:45 pmShannon
Mar 11
SNN7:50 amShannon
32h 25m
3 stops
PDX9:15 amPortland
$691
Find similar
Air Canada
Mar 5
PDX7:11 amPortland
20h 19m
3 stops
SNN11:30 amShannon
Mar 11
SNN7:50 amShannon
32h 25m
3 stops
PDX9:15 amPortland
$703
Find similar

American Airlines flights from Portland to Shannon, Clare

Our best American Airlines deals on Portland to Shannon, Clare flight tickets
American Airlines
Mar 1
PDX5:45 pmPortland
15h 00m
1 stop
SNN4:45 pmShannon
Mar 8
SNN7:50 amShannon
16h 05m
1 stop
PDX3:55 pmPortland
$485
Find similar
American Airlines
Mar 5
PDX6:00 amPortland
21h 30m
2 stops
SNN11:30 amShannon
Mar 11
SNN7:50 amShannon
16h 05m
1 stop
PDX4:55 pmPortland
$489
Find similar
American Airlines
Mar 5
PDX2:10 pmPortland
18h 35m
2 stops
SNN4:45 pmShannon
Mar 11
SNN7:50 amShannon
16h 05m
1 stop
PDX4:55 pmPortland
$490
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Portland 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 September 17, 2025.
Use the filters below to find and compare flights from Portland to Shannon, Clare that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

PortlandShannon

PDX - SNN

PDXSNN

Portland

Sun 3/1

5:45 pm-4:45 pm

1 stop15h 00m

Shannon

Sun 3/8

7:50 am-3:55 pm

1 stop16h 05m

$485

PortlandShannon

PDX - SNN

PDXSNN

Portland

Thu 3/5

6:00 am-11:30 am

2 stops21h 30m

Shannon

Wed 3/11

7:50 am-4:55 pm

1 stop16h 05m

$489

PortlandShannon

PDX - SNN

PDXSNN

Portland

Thu 3/5

2:10 pm-4:45 pm

2 stops18h 35m

Shannon

Wed 3/11

7:50 am-4:55 pm

1 stop16h 05m

$490

PortlandShannon

PDX - SNN

PDXSNN

Portland

Thu 3/5

12:02 pm-4:45 pm

2 stops20h 43m

Shannon

Wed 3/11

7:50 am-11:13 pm

2 stops22h 23m

$500

PortlandShannon

PDX - SNN

PDXSNN

Portland

Wed 11/12

3:15 pm-11:30 am

2 stops36h 15m

Shannon

Sun 11/16

8:05 pm-9:15 am

2 stops45h 10m

$685

PortlandShannon

PDX - SNN

PDXSNN

Portland

Thu 3/5

3:15 pm-4:45 pm

2 stops17h 30m

Shannon

Wed 3/11

7:50 am-9:15 am

3 stops32h 25m

$691

PortlandShannon

PDX - SNN

PDXSNN

Portland

Thu 3/5

3:15 pm-4:45 pm

2 stops17h 30m

Shannon

Wed 3/11

7:50 am-9:15 am

3 stops32h 25m

$692

PortlandShannon

PDX - SNN

PDXSNN

Portland

Thu 3/5

7:11 am-11:30 am

3 stops20h 19m

Shannon

Wed 3/11

7:50 am-2:45 pm

2 stops37h 55m

$696

PortlandShannon

PDX - SNN

PDXSNN

Portland

Sat 11/1

9:34 am-11:30 am

2 stops18h 56m

Shannon

Fri 11/7

8:05 pm-4:31 pm

2 stops28h 26m

$4,185

PortlandShannon

PDX - SNN

PDXSNN

Portland

Sat 11/1

12:45 am-11:30 am

2 stops27h 45m

Shannon

Fri 11/7

7:50 am-3:55 pm

1 stop16h 05m

$9,027

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 15 resultsSorted by cheapest first
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See travel insights to Shannon from

How to get the cheapest flight ticket from Portland 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 to Shannon, Clare is on a Wednesday when prices can be found for as low as $623. The most expensive day to fly to Shannon, Clare is Friday, with ticket prices averaging around $1,029.

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

Our data shows that the cheapest Portland to Shannon, Clare flights are usually those with departure times at noon. Our users have found flights to Shannon, Clare at noon for as low as $554. Flights in the evening are often more expensive with an average ticket price of $924.

When to book flights from Portland to Shannon, Clare

Are you open to changing your travel dates? Check out the ideal times to fly from Portland to Shannon, Clare according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Portland to Shannon, Clare (PDX to SNN) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Portland to Shannon, Clare

Direct flights

None
There are no direct flights from Portland to Shannon, Clare. There are no popular flight routes from Portland to Shannon, Clare.
Search flight deals

  • How far is Portland to Shannon by plane?

    Portland and Shannon are 4602.4 mi apart from one another. In terms of flight time, this usually takes a little over 14h 55m.

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

    Prices for flights from Portland Airport to Shannon Airport are updated 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?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check 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 required for your trip to Shannon Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Shannon Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

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

Best airlines flying from Portland to Shannon, Clare

Compare and see reviews for airlines that fly from Portland to Shannon, Clare with momondo
Airline
Rating
Free Cancellation
Price
DeltaPriceFrom $546Free CancellationRating
7.9
7,961 reviews
Search Delta flights
United AirlinesPriceFrom $561Free CancellationRating
7.4
8,926 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
Bunratty
Lahinch
Nenagh

Why use momondo?

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

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Portland to Shannon. momondo saves you time and could save you money on your trip.

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

All flight searches from Portland to Shannon on momondo can be filtered to show those which offer flexible booking policies.

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

Once all potential Portland to Shannon flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

If you are simply researching potential flights to Shannon, momondo offers a useful price alert feature which will track prices for flights to Shannon from Portland and alert you when they change.

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