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Cheap flights from Portland to Shannon from $513

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 9/10. 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 to Shannon

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
5:00 am - 7:30 amPDX  Portland-SNN Shannon
18h 30m2 stops Denver Intl Chicago O'Hare Intl
United Airlines Logo
12:30 pm - 10:23 pmSNN  Shannon-PDX Portland
17h 53m2 stops Newark Chicago O'Hare Intl
$771United Airlines
Mon, Sep 21 - Tue, Oct 6
United Airlines Logo
7:02 am - 7:30 amPDX  Portland-SNN Shannon
16h 28m1 stop Chicago O'Hare Intl
United Airlines Logo
12:30 pm - 9:27 pmSNN  Shannon-PDX Portland
16h 57m1 stop Newark
$771United Airlines
Mon, Sep 21 - Tue, Oct 6
United Airlines Logo
8:15 am - 7:30 amPDX  Portland-SNN Shannon
15h 15m1 stop Chicago O'Hare Intl
United Airlines Logo
12:30 pm - 9:31 amSNN  Shannon-PDX Portland
29h 01m2 stops Newark Chicago O'Hare Intl
$771United Airlines
Mon, Sep 21 - Tue, Oct 6
United Airlines Logo
10:35 am - 7:30 amPDX  Portland-SNN Shannon
12h 55m1 stop Chicago O'Hare Intl
United Airlines Logo
12:30 pm - 10:03 pmSNN  Shannon-PDX Portland
17h 33m1 stop Newark
$813United Airlines
Tue, Sep 8 - Tue, Sep 15
Delta Logo
7:00 am - 11:10 amPDX  Portland-SNN Shannon
20h 10m1 stop New York John F Kennedy Intl
Delta Logo
1:05 pm - 9:03 pmSNN  Shannon-PDX Portland
15h 58m1 stop New York John F Kennedy Intl
$863Delta
Sun, Sep 6 - Sun, Sep 13
Air France Logo
9:45 am - 11:10 amPDX  Portland-SNN Shannon
17h 25m2 stops Salt Lake City New York John F Kennedy Intl
Air France Logo
1:05 pm - 9:03 pmSNN  Shannon-PDX Portland
15h 58m1 stop New York John F Kennedy Intl
$867Air France
Sun, Sep 6 - Sun, Sep 13
Delta Logo
10:35 pm - 11:10 amPDX  Portland-SNN Shannon
28h 35m1 stop New York John F Kennedy Intl
Delta Logo
1:05 pm - 9:03 pmSNN  Shannon-PDX Portland
15h 58m1 stop New York John F Kennedy Intl
$868Delta
Sat, Sep 5 - Sat, Sep 19
Delta Logo
7:10 am - 11:10 amPDX  Portland-SNN Shannon
20h 00m1 stop New York John F Kennedy Intl
Delta Logo
1:05 pm - 9:03 pmSNN  Shannon-PDX Portland
15h 58m1 stop New York John F Kennedy Intl
$890Delta
Wed, Sep 16 - Sun, Sep 20
Air France Logo
7:00 am - 11:10 amPDX  Portland-SNN Shannon
20h 10m1 stop New York John F Kennedy Intl
Air France Logo
1:05 pm - 9:03 pmSNN  Shannon-PDX Portland
15h 58m1 stop New York John F Kennedy Intl
$913Air France
Sat, Sep 5 - Sat, Sep 12
Air Canada Logo
7:10 pm - 4:45 pmPDX  Portland-SNN Shannon
38h 35m2 stops Vancouver Intl London Heathrow
Air Canada Logo
7:50 am - 8:46 pmSNN  Shannon-PDX Portland
20h 56m2 stops London Heathrow Vancouver Intl
$951Air Canada
Sat, Oct 31 - Wed, Nov 11

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United Airlines flights from Portland to Shannon, Clare

Our best United Airlines deals on Portland to Shannon, Clare flight tickets
United Airlines
Sep 21
PDX7:02 amPortland
16h 28m
1 stop
SNN7:30 amShannon
Oct 6
SNN12:30 pmShannon
16h 57m
1 stop
PDX9:27 pmPortland
$771
United Airlines
Sep 8
PDX10:35 amPortland
12h 55m
1 stop
SNN7:30 amShannon
Sep 15
SNN12:30 pmShannon
17h 33m
1 stop
PDX10:03 pmPortland
$813
United Airlines
Sep 8
PDX5:00 amPortland
18h 30m
2 stops
SNN7:30 amShannon
Sep 15
SNN12:30 pmShannon
18h 15m
2 stops
PDX10:45 pmPortland
$817

Delta flights from Portland to Shannon, Clare

Our best Delta deals on Portland to Shannon, Clare flight tickets
Delta
Sep 6
PDX7:00 amPortland
20h 10m
1 stop
SNN11:10 amShannon
Sep 13
SNN1:05 pmShannon
15h 58m
1 stop
PDX9:03 pmPortland
$863
Delta
Sep 5
PDX10:35 pmPortland
28h 35m
1 stop
SNN11:10 amShannon
Sep 19
SNN1:05 pmShannon
15h 58m
1 stop
PDX9:03 pmPortland
$868
Delta
Sep 16
PDX7:10 amPortland
20h 00m
1 stop
SNN11:10 amShannon
Sep 20
SNN1:05 pmShannon
15h 58m
1 stop
PDX9:03 pmPortland
$890

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 August 11, 2026.
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

Cheapest round-trip

PortlandShannon

PDX Portland - SNN Shannon

PDXSNN

Portland

Mon 9/21

5:00 am-7:30 am

2 stops18h 30m

Shannon

Tue 10/6

12:30 pm-10:23 pm

2 stops17h 53m

$771

PortlandShannon

PDX Portland - SNN Shannon

PDXSNN

Portland

Mon 9/21

7:02 am-7:30 am

1 stop16h 28m

Shannon

Tue 10/6

12:30 pm-9:27 pm

1 stop16h 57m

$771

PortlandShannon

PDX Portland - SNN Shannon

PDXSNN

Portland

Mon 9/21

8:15 am-7:30 am

1 stop15h 15m

Shannon

Tue 10/6

12:30 pm-9:31 am

2 stops29h 01m

$771
Quickest round-trip

PortlandShannon

PDX Portland - SNN Shannon

PDXSNN

Portland

Tue 9/8

10:35 am-7:30 am

1 stop12h 55m

Shannon

Tue 9/15

12:30 pm-10:03 pm

1 stop17h 33m

$813

PortlandShannon

PDX Portland - SNN Shannon

PDXSNN

Portland

Sun 9/6

7:00 am-11:10 am

1 stop20h 10m

Shannon

Sun 9/13

1:05 pm-9:03 pm

1 stop15h 58m

$863

PortlandShannon

PDX Portland - SNN Shannon

PDXSNN

Portland

Sun 9/6

9:45 am-11:10 am

2 stops17h 25m

Shannon

Sun 9/13

1:05 pm-9:03 pm

1 stop15h 58m

$867

PortlandShannon

PDX Portland - SNN Shannon

PDXSNN

Portland

Sat 9/5

10:35 pm-11:10 am

1 stop28h 35m

Shannon

Sat 9/19

1:05 pm-9:03 pm

1 stop15h 58m

$868

PortlandShannon

PDX Portland - SNN Shannon

PDXSNN

Portland

Wed 9/16

7:10 am-11:10 am

1 stop20h 00m

Shannon

Sun 9/20

1:05 pm-9:03 pm

1 stop15h 58m

$890

PortlandShannon

PDX Portland - SNN Shannon

PDXSNN

Portland

Sat 9/5

7:00 am-11:10 am

1 stop20h 10m

Shannon

Sat 9/12

1:05 pm-9:03 pm

1 stop15h 58m

$913

PortlandShannon

PDX Portland - SNN Shannon

PDXSNN

Portland

Sat 10/31

7:10 pm-4:45 pm

2 stops38h 35m

Shannon

Wed 11/11

7:50 am-8:46 pm

2 stops20h 56m

$951

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 14 resultsSorted by cheapest first
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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

Can stopping save me money on Portland to Shannon, Clare flights?

You could potentially save up to 16% on your flight if you consider stops on a Portland to Shannon, Clare flight.

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

Fastest flight time

12h 55m

Direct flights

None
The fastest flight from Portland to Shannon, Clare takes 12h 55m
There are no direct flights from Portland to Shannon, Clare. There are no popular flight routes from Portland to Shannon, Clare.
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Frequently asked questions about flying from Portland to Shannon, Clare

  • 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 12h 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
American AirlinesPriceFrom $480Free CancellationRating
7.1
11,902 reviews
Search American Airlines flights
DeltaPriceFrom $488Free CancellationRating
7.8
8,505 reviews
Search Delta flights
United AirlinesPriceFrom $608Free CancellationRating
7.4
10,103 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
Tipperary

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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