PDX - SNN

$474 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 1/28. 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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Everything you should know

Cheapest round-trip
$474
American Airlines
Thu 3/5Wed 3/11
PDX - SNN • 2 stops
Cheapest one-way
$361
Multiple Airlines
Wed 1/28
PDX - SNN • 3 stops
Top airlines
American Airlines
Cheapest • from $474 (round-trip)
Delta
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
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Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Portland to Shannon (PDX-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

Thu, Mar 5 - Wed, Mar 11
American Airlines Logo
1:51 pm - 4:45 pm
PDX
-
SNN
18h 54m2 stops
American Airlines Logo
7:50 am - 4:55 pm
SNN
-
PDX
16h 05m1 stop
$474American Airlines
Tue, Jan 20 - Tue, Jan 27
American Airlines Logo
6:00 am - 11:30 am
PDX
-
SNN
21h 30m2 stops
American Airlines Logo
7:50 am - 8:27 pm
SNN
-
PDX
20h 37m2 stops
$484American Airlines
Thu, Apr 30 - Thu, May 14
United Airlines Logo
5:30 am - 10:15 am
PDX
-
SNN
20h 45m3 stops
United Airlines Logo
12:30 pm - 9:16 pm
SNN
-
PDX
16h 46m1 stop
$572United Airlines
Thu, Apr 30 - Thu, May 14
Lufthansa Logo
3:27 pm - 11:15 am
PDX
-
SNN
35h 48m2 stops
Lufthansa Logo
10:55 am - 12:48 am
SNN
-
PDX
21h 53m2 stops
$603Lufthansa
Thu, Apr 30 - Thu, May 14
American Airlines Logo
7:30 pm - 4:10 pm
PDX
-
SNN
12h 40m1 stop
American Airlines Logo
7:40 am - 5:40 pm
SNN
-
PDX
18h 00m1 stop
$612American Airlines
Thu, Apr 2 - Sat, Apr 11
Multiple Airlines Logo
2:10 pm - 11:15 am
PDX
-
SNN
37h 05m2 stops
Multiple Airlines Logo
7:40 am - 9:15 am
SNN
-
PDX
33h 35m2 stops
$615Multiple Airlines
Thu, Apr 30 - Thu, May 14
American Airlines Logo
3:18 pm - 4:10 pm
PDX
-
SNN
16h 52m2 stops
American Airlines Logo
7:40 am - 5:40 pm
SNN
-
PDX
18h 00m1 stop
$616American Airlines
Thu, Mar 5 - Wed, Mar 11
American Airlines Logo
11:46 am - 4:45 pm
PDX
-
SNN
20h 59m2 stops
American Airlines Logo
7:50 am - 4:55 pm
SNN
-
PDX
16h 05m1 stop
$629American Airlines
Thu, Mar 5 - Wed, Mar 11
American Airlines Logo
11:46 am - 11:30 am
PDX
-
SNN
15h 44m2 stops
American Airlines Logo
7:50 am - 10:02 pm
SNN
-
PDX
21h 12m2 stops
$642American Airlines
Thu, Apr 2 - Sat, Apr 11
American Airlines Logo
7:30 pm - 8:35 pm
PDX
-
SNN
17h 05m1 stop
American Airlines Logo
7:40 am - 11:37 pm
SNN
-
PDX
23h 57m2 stops
$655American 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 72 hours.

In the past 3 days, the cheapest round-trip tickets from Portland to Shannon were found on American Airlines ($474) and United Airlines ($572).

Which airlines fly non-stop between Portland and Shannon?

Airline and price data is aggregated from results in KAYAK’s search results from the last 2 weeks for round-trip flights from Portland to Shannon.

There are 4 airlines that fly nonstop from Portland to Shannon. They are: Aer Lingus, American Airlines, Delta and United Airlines. The cheapest price of all airlines flying this route was found with Delta at $497 for a round-trip flight. On average, the best prices for this route can be found at Delta.

Good to know

Cheapest flight$361
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

  • How can I get from Shannon Airport to downtown Shannon?

    The public transport available from SNN airport to Shannon city center is the 343 bus, which takes around seven minutes to get you to town. The bus departs every 30 minutes and offers daily services. However, if you need a quick journey, you can take a taxi or a town car to arrive in the city in approximately five minutes.

  • What business or first-class amenities can I expect when flying from Portland to Shannon?

    Most airlines have special amenities for their first-class passengers. If flying with British Airways, you enjoy comfortable and spacious seats, a cotton duvet, a pillow, and a quilted mattress on your 12-hour flight. If flying with Aer Lingus, you can enjoy lie-flat seats, magazines, and dental kits. However, your airline sends you an email after booking so you know what to expect during your flight.

  • Which airlines offer sustainable journeys from Portland to Shannon?

    If you prefer a more eco-friendly journey when booking cheap flights from Portland to Shannon, choose Aer Lingus. These airlines use sustainable aviation fuel (SAF) and aim to achieve zero carbon emissions by 2050. You can also use British Airways, which creates a better sustainable future through Project Speedbird, to reduce carbon emissions.

  • Can I upgrade to first-class flights from Portland to Shannon?

    Some airlines give you an allowance for upgrading your class of ticket when flying from Portland to Shannon. Mostly, your airline sends you an email after you book to offer the opportunity to upgrade, especially if first-class seats are available. This is a great opportunity because the journey from Portland to Shannon is longer, and comfortable first-class seats give you a smooth travel experience.

  • 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 $361 for a one-way ticket and $474 for a round-trip.

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

    A passport is required to fly from Portland to Shannon.

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

    Portland and Shannon are both served by 1 main airport. You will leave Portland from Portland and will be arriving at 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?

    oneworld, SkyTeam, and Star Alliance are the airline alliances operating flights between Portland and Shannon, with oneworld being the most commonly used for this route.

  • Which is the best airline for flights from Portland to Shannon, Delta or United Airlines?

    The two airlines most popular with KAYAK users for flights from Portland to Shannon are Delta and United Airlines. With an average price for the route of $687 and an overall rating of 7.9, Delta is the most popular choice. United Airlines is also a great choice for the route, with an average price of $744 and an overall rating of 7.4.

  • 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.

KAYAK’s top tips for finding a cheap flight from Portland to Shannon

  • Shannon Airport (SNN) serves several nearby cities. Upon arrival, you can visit a few cities, such as Limerick to the southeast, Ennis to the north, Adare to the south, and Gort to the north. These cities have many attractions and new cultures to make your days lively.
  • Most airlines from Portland to Shannon, including British Airways, Aer Lingus, and United Airlines, have layovers in New York. Before booking, check the layover period to book an airline that arrives at your convenience.
  • Portland International Airport (PDX) is a hub for Alaska Airlines, while SNN airport is a hub for Aer Lingus. These airports serve several domestic and international cities, in North American and European countries.
  • One of the most convenient ways to travel from downtown Portland to PDX airport is taking the MAX Red Line tram to arrive in around 39 minutes. Also, you can board a Line 12 or MAX Line bus to get to the airport in approximately 1h 6min. If you need a quick journey, a taxi or rental car gets you to the airport in about 17 minutes.
  • United Airlines is your best choice if you need a special diet when flying with cheap flights from Portland to Shannon. All you need to do is select one of the available special meals and preorder your meal five days before your flight.

Reviews of the top 4 airlines serving 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.
7.9
DeltaOverall score based on 8014 reviews
7.9Comfort
7.3Food
8.1Boarding
8.5Crew
7.9Entertainment
Airline reviews

The plant way delayed departing by 3 hours. It was an old airplane with broken seats and armrests. The bathroom made a hollering sound. A really crappy flight experience and travel day all around.

2.0 MediocrePeter, Dec 2025
JFK - MEM
Read more Delta reviews

The plant way delayed departing by 3 hours. It was an old airplane with broken seats and armrests. The bathroom made a hollering sound. A really crappy flight experience and travel day all around.

Flight delays both to Detroits and return flight . The flight to Detroit was associated with mechanical difficulty

I am extremely disappointed that delta internal pilot manuals now refer to the Gulf of Mexico as the “gulf of America”. You can bow down to the Orange turd on your own. I will never fly delta again

Wasn't a Delta issue I don't think, but seems there was a Delta flight at each of the 2 Dallas airports at the same exact time, both to Atlanta. I was evidently booked on the one at Love Airport, but the Carey transport shuttle took me to DFW instead and I ended up missing the flight by just a few minutes. Was able to book a Southwest flight from Love Airport, but was a big loss of time and an inconvenience.

Great. I had to modify a flight. That was easy and free. Thank You

I noticed that the planes seem to be outdated. There was no entertainment per se. Also, the waiting area did not have any working electrical outlets

None of the airplane features were available during the flight.

Original flight was cancelled and when i was rebooked by the airline, they couldn't seat me in the same type of seat as I had originally booked (went from window/aisle to middle/middle and one was a bulkhead seat, and other wasn't in the same class)

Lady Pilot was perfect in every way wheels up to wheels down communication, professionalism, excellent on time departure and on time arrival, excellent communication! Fantastic job with Superb attitude!!

The food is terrible. The staff is wonderful. Comfort is good.

They did the one thing that really matters - got to Chicago early.

I liked the snacks and the flight attendants were friendly.

Gate agent at Frankfurt was terrible. She denied PRE boarding even as it was printed on the boarding pass. Refused to look at the boarding pass and literally shouting for no reason. Frankfurt airport has horrible and rude staff who avoids trying to answer any question at all. Overall, horrible experience.

The Crew and the food was the worst I ever had in Business Class. First they told us there were no space for carry on. It was plenty of space over our 2 row seats, we had to ask to let us travel with it which was accepted. They were aware that we had to run for the connection due to the previous flight delay. Have us one hour waiting for more customers and not even offer a glass of water. Then started the service and they started to serve other passengers drinks in business and did not offer any drinks until they serve our pre ordered meal and I ask for something to drink. I had to wait until they finished to serve all passengers until Inget something. The crew was the worts I ever had for Business Class in my life.

Very turbulent trip made it pretty bearable, plus the lack of refreshments served and the lack of any air conditioning before takeoff which took an hour or more.

Flight was late - I was downgraded from first class to coach

Not good - outbound flight was delayed and missed my connection even though I got to the gate after running through the airport - the agent would not let me on because the door was closed (flight had not left). There was no notification from United - overall experience was very disappointing. Additionally, I was downgraded from first class to coach on the alternative flight

The flight was on time. I generally don’t drink or eat on short flights and the seats were good and the flight attendants were friendly. That’s all I expect

It was nice to have gotten up upgraded to first class with a meal on a three hour flight

Not great experience - we were super late boarding due to issues with aircraft. Then when we finally all got onboard and seated and they started taxiing out to the runway they just stopped then turned around and went back to the airport. Apparently the crew “ran out of time” to legally fly us. They mentioned that they were about 2 minutes away from taking off. I understand the rules and safety but kinda wonder why they would have bothered boarding us in the first place? Had to go all the way back and de plane and then wait in a HUGE line to get a hotel (this is somewhere around 2:30am) finally got to hotel by Uber (no shuttle after 20min so gave up) and they ended up putting us all back on the same aircraft at 10am next morning so got about 2.5 hours sleep. They did give us. $250 credit, but it was a São Paulo Brazil flight out of Dulles. The flight and everything was fine.

Great flight - friendly and attentive team! Seats in coach were comfy, but a little cramped - but that is the case with all airlines ;)

The boarding by groups is pointless. The first two groups worked fine, but almost Noone boarded in goups three thru five leaving the vast majority boarding when group six was called. It defeated the purpose of spreading out the crowd.

I don’t know who decides what food to serve on these flights but I would be so embarrassed if I served this to anyone and call it food…

For whatever reason, the flight was not catered -we were told it would be a 45 minute delay waiting for catering - so no food. There were opened candy and peanuts in the seatback pocket. Flight landed early in DFW but due to the assigned gate not being available, we sat on the ground for 30 minutes waiting for the gate to open - making the flight actually arrive at the gate late.

Not great. Booked Extra seats and got nothing extra at all. It’s basically a big budget airline.

The pilot greased the landing and the crew was fantastic.

I bought wifi and most of the flight could not even use it my apps would just spin. I couldn't even listen to music. super frustrating.

delayed due to weather. Could not communicate with family since the wifi was broken

Experience was good, however I had a delay due to weather happening and had to re purchase a seat on a new plane for a higher price (could be my own issue and misunderstanding) but other than that situation. First time flyer (by myself) was terrific!! The last from ORD to ALO didn't have wifi, but it was only 45 minutes so I'm sure that was part of the reason. Overall my experience was great! Next time I will remember to buy tickets with longer layovers. The delays really saved my overall anxiety. :)

Flight was delayed 17 hours due to aircraft issues. American did provide hotel, transportation and meals, 3 hours past boarding time, but it took us another hour to get the vouchers.

Canceled my flight couple hours before takeoff. They could not find a decent re-routing and refused to pay for when i subjected alternative with Lufthansa.

Seats a little to soft on the SFO DUB flight

I was not admitted to the flight!!! I need a refund for this

Well, I think we left close to on time. Crew was “eh”.

This is a bit of a rant, but I'll try to keep it civil. The flight was delayed for 2 hours with almost ZERO updates from agents. Just "there's technical issues, we don't know if or when it'll be resolved" once an hour maybe? And the gate signs, and app never updated to show the delay until it was finally resolved. So when I called Aer Lingus to see if I could rebook, I had literally the dumbest conversation with the person on the phone there where he says "It's showing your flight departed at 11:10. So it's already departed!", where I responded, "Well, it's 12:45 and I'm on the phone with you, standing in the airport, staring at the plane. So...I'm not sure what your system is saying, but we aren't in the air right now.". He said "Nothing I can do. Since it doesn't show delayed in my system, you would be charged to reschedule." Once we finally departed 2 hours late, things were going smoothly as I would expect, except in another very strange way. The stewardesses were rolling the cart down the aisle offering drinks and I asked for a water, to which they said "Sure, you can buy a bottle". I'm not sure if this is an Aer Lingus thing. Maybe something I'd expect from Ryan Air, but for a 3 hour international flight, to not have complimentary water available for customers is an absolute first, in 15 years of flying for me. I'm not upset with the plane staff at all. They were very friendly, but Aer Lingus' policies, how they handled the delay, and the unbelievable conversation with the customer service representative, leaves a lot to be desired in those areas. Also, I'm not upset about the delay. Things happen. Technical issues. But this is a place where airlines really need to clearly communicate with their customers. They also changed gates from 12N to 13N and there was no notification on any app, or announcement over the PA. End of rant. I hope they get some feedback on how to improve communication, because otherwise, they were great. And the second leg of my trip was incredibly smooth - no nickle and diming water, no communication issues. Very professional and efficient and even landed early

The folks and flights were fantastic. I unfortunately wasn’t able to order a meal that I could eat (I’m gluten free) because I got my ticket through kayak, but they tried their best to find something to help me get through the long flight and I’ll forever remember their kindness.

Flight takeoff was delayed an hour, but arrival time was not updated at the same time as departure time, so those picking me up at the other end were not alerted to the change in my arrival.

Seats are terribly cramped. I’m only 5’2” and my knees were practically in my face. No room to put a normal size bag under the seat and when the person in front of you reclined their seat your tray table was in your lap. This is the airline’s way of cramming more seats into the plane to make more money. I’ll think twice about taking Aer Lingus again since there are a few other options from Boston to the Emerald Isle.

Couldn’t check In online, message was couldn’t check in until Sunday morning though plane left Saturday night. Checked in okay at airport but caused slot if stress.

It all went very well, except for the ramp coordination upon landing in Boston. That, however, was resolved in fairly short order.

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

Information on your arrival and departure airports