PWM - SNN

$454 Find Cheap Flights from Portland to Shannon

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Portland to Shannon departing on 7/18. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Shannon

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Portland to Shannon, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Portland to Shannon, as well as popular online travel agencies
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41,299,237 searches in the past 7 days on KAYAK

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Everything you should know

Cheapest round-trip
$709
United Airlines
Sat 9/5Mon 9/14
PWM - SNN • 1 stop
Cheapest one-way
$454
Multiple Airlines
Sat 7/18
PWM - SNN • 2 stops
Top airlines
United Airlines
Cheapest • from $709 (round-trip)
United Airlines
Best reviews • 7.4 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between Portland and Shannon. You'll need at least 1 connection.
Insights
Insights
Insights
Insights
Top layover airports
Newark (EWR)
Cheapest • Avg $853 (round-trip)
Newark (EWR)
Shortest trip • 9h 40m (one-way)
Insights
Insights
Insights
Insights
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Shannon!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Portland to Shannon (PWM-SNN)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Portland to Shannon that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Portland to Shannon

Sat, Sep 5 - Mon, Sep 14
United Airlines Logo
6:00 am - 7:30 am
PWM
-
SNN
20h 30m
1 stop
United Airlines Logo
9:30 am - 5:54 pm
SNN
-
PWM
13h 24m
1 stop
$709United Airlines
Sat, Sep 5 - Mon, Sep 14
United Airlines Logo
3:47 pm - 10:15 am
PWM
-
SNN
13h 28m
1 stop
United Airlines Logo
9:30 am - 11:32 pm
SNN
-
PWM
19h 02m
2 stops
$714United Airlines
Sun, Sep 6 - Mon, Sep 14
United Airlines Logo
3:47 pm - 10:15 am
PWM
-
SNN
13h 28m
1 stop
United Airlines Logo
12:30 pm - 6:29 pm
SNN
-
PWM
10h 59m
1 stop
$737United Airlines
Sun, Sep 6 - Mon, Sep 14
United Airlines Logo
6:00 am - 10:15 am
PWM
-
SNN
23h 15m
2 stops
United Airlines Logo
9:30 am - 5:54 pm
SNN
-
PWM
13h 24m
1 stop
$742United Airlines
Sun, Sep 6 - Mon, Sep 14
United Airlines Logo
6:00 am - 10:15 am
PWM
-
SNN
23h 15m
2 stops
United Airlines Logo
12:30 pm - 10:04 am
SNN
-
PWM
26h 34m
2 stops
$752United Airlines
Sun, Sep 6 - Thu, Sep 10
United Airlines Logo
10:45 am - 10:15 am
PWM
-
SNN
18h 30m
1 stop
United Airlines Logo
12:30 pm - 11:32 pm
SNN
-
PWM
16h 02m
1 stop
$761United Airlines
Sun, Sep 6 - Thu, Sep 10
United Airlines Logo
6:00 am - 10:15 am
PWM
-
SNN
23h 15m
2 stops
United Airlines Logo
9:30 am - 5:54 pm
SNN
-
PWM
13h 24m
1 stop
$766United Airlines
Sun, Sep 6 - Thu, Sep 10
United Airlines Logo
5:51 am - 7:30 am
PWM
-
SNN
20h 39m
2 stops
United Airlines Logo
12:30 pm - 11:59 pm
SNN
-
PWM
40h 29m
2 stops
$777United Airlines
Thu, Jul 30 - Mon, Aug 10
Lufthansa Logo
3:16 pm - 10:15 am
PWM
-
SNN
13h 59m
1 stop
Lufthansa Logo
12:30 pm - 11:30 pm
SNN
-
PWM
16h 00m
1 stop
$800Lufthansa
Thu, Jul 30 - Mon, Aug 10
United Airlines Logo
10:55 am - 10:15 am
PWM
-
SNN
18h 20m
1 stop
United Airlines Logo
12:30 pm - 11:30 pm
SNN
-
PWM
16h 00m
1 stop
$801United Airlines
Booking Insights

KAYAK's insights & trends for Portland to Shannon flights

Get data-powered insights and trends into flights from Portland to Shannon to help you find the cheapest flights, the best time to fly and much more.

Which airlines provide the cheapest flights from Portland to Shannon?

The cheapest round-trip price for the route for each airline clicked by KAYAK users in the last 3 days.

In the past 3 days, the cheapest round-trip tickets from Portland to Shannon were found on United Airlines ($709) and Lufthansa ($800).

Find deals

Good to know

Cheapest flight$454
Flight from Portland to Shannon

When to book flights from Portland to Shannon

Are your dates flexible? Find out the best times to travel from Portland to Shannon based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Portland to Shannon

  • What is the cheapest flight from Portland to Shannon?

    In the last 3 days, the lowest price for a flight from Portland to Shannon was $454 for a one-way ticket and $709 for a round-trip.

  • Do I need a passport to fly between Portland and Shannon?

    Yes, you'll most likely have to show a valid passport before boarding the plane in Portland and on arrival in Shannon.

  • Which airports will I be using when flying from Portland to Shannon?

    When flying out of Portland you will be using Portland. You will be landing at Shannon, also known as Shannon.

  • Which aircraft models fly most regularly from Portland to Shannon?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Portland to Shannon?

    Star Alliance is the only airline alliance operating flights between Portland and Shannon.

  • How does KAYAK find such low prices on flights from Portland to Shannon?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Portland to Shannon.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Portland to Shannon?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Shannon from Portland is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Portland to Shannon?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Shannon with an airline and back to Portland with another airline. Booking your flights between Portland and SNN can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Portland to Shannon?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Shannon from Portland up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airline flying from Portland to Shannon

 
See real verified KAYAK customer reviews for airlines flying from Portland to Shannon. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Portland to Shannon? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.4
United AirlinesOverall score based on 9763 reviews
7.3Comfort
8.1Crew
7.7Boarding
7.1Entertainment
6.6Food
Airline reviews

Flight was delayed but more than 90 minutes. This caused me to miss my available windows for pick-up by a friend. I had to pay $125 for an uber back home from the airport which was an added expense that I had not budgeted for my trip. Staff was friendly.

4.0 OkayAnonymous, May 2026
LAX - RNO
Read more United Airlines reviews

Flight was delayed but more than 90 minutes. This caused me to miss my available windows for pick-up by a friend. I had to pay $125 for an uber back home from the airport which was an added expense that I had not budgeted for my trip. Staff was friendly.

I felt scammed. The priced advertised was different than what I paid. I paid the whole some online. I then got a call 20 minutes later saying I need to paid 70 more person. She said the price online is not the guaranteed price.

Seat pitch is horrible especially on the 15 hour flight. Gate crew at SFO was Outstanding. The flight crew was also great.

Easy of boarding, helpfully staff at check in, surprisingly comfortable seating

Check in was chaotic with only one counter for business class and first class. The luggage conveyor belt at JFK airport was broken so the flight departure was delayed which made the flight stressful as I had a tight connection. Although the captain said they could make up the delay, they didn’t do so.

Had a one hour delay due to mechanical issue. I didn’t think I’d be able to make my connecting flight, but they waited for me and greeted me when I arrived to help things run smooth.

Lost of requested seat assignments. Lost my husband's meal choice

6 1/2 hours from Tampa to SFO on a Boeing 737. Cramped. No Service. No real food. One pass for coffee at the beginning and a second pass THREE hours later. And check-in in Tampa was nasty even by United standards. And I am at almost TWO million miles on United. It's a non-stop. But terrible service.

MY FAMILY'S LUGGAGE WAS LOST FROM ROME TO BARI. I WAS THE ONLY ONE THAT RECEIVED MY LUGGAGE FROM ROME TO BARI. AFTER DEPLANING IN BARI, WE WASTED A LOT OF TIME AT BAG CLAIMS LOST AND FOUND REPORTING THE CLAIM AND PLEADING FOR THE BAGS TO BE DELIVERED THE NEXT DAY. WE WERE TOLD THAT IT TAKES 3 DAYS MINIMUM TO DELIVER. MY DAUGHTER AND MY GIRLFRIEND NEEDED THEIR PERSONAL THINGS AND WE WERE STAYING 3 HOURS AWAY FROM THE BARI AIRPORT. WE HAD TO DRIVE 3 HOURS TO THE AIRPORT TO COLLECT OUR LOST LUGGAGE THE NEXT DAY. WE ARE NOT HAPPY WITH THE EXPERIENCE

We had a delay, but thankfully I made it to my connection. Overall it went smooth

Everything you need to know for your flight from Portland to Shannon

Information on your arrival and departure airports

Portland (PWM)
Shannon (SNN)