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IAD - SNN

Find cheap flights from Washington Dulles Airport to Shannon from $388

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Dulles Intl to Shannon departing on 8/19. 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
0 bags
Mon 6/3
Mon 6/10

Search 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 Washington, D.C. 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 Washington, D.C. to Shannon, as well as popular online travel agencies
In the last 7 days travelers have searched 43,369,418 times on KAYAK, and here is why:

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Cheap flight deals from Dulles Intl to Shannon (IAD-SNN)

Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Dulles Intl 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 and deals for you by selecting your travel dates.
Choose your dates
4:55 pm - 10:50 amIAD-SNN
12h 55m1 stop
12:50 pm - 12:10 pmSNN-IAD
28h 20m1 stop
$828Delta
Find Deal
Tue, Sep 24 - Wed, Oct 2
4:55 pm - 10:50 amIAD-SNN
12h 55m1 stop
12:50 pm - 12:07 amSNN-IAD
16h 17m2 stops
$852KLM
Find Deal
Tue, Sep 24 - Wed, Oct 2
2:05 pm - 8:35 pmIAD-SNN
25h 30m2 stops
9:25 pm - 11:47 pmSNN-IAD
31h 22m2 stops
$854American Airlines
Find Deal
Thu, Sep 12 - Mon, Sep 16
8:25 am - 7:30 amIAD-SNN
18h 05m1 stop
9:30 am - 5:54 pmSNN-IAD
13h 24m1 stop
$861United Airlines
Find Deal
Thu, Sep 5 - Fri, Sep 13
8:25 am - 7:30 amIAD-SNN
18h 05m1 stop
9:30 am - 12:15 amSNN-IAD
19h 45m1 stop
$900United Airlines
Find Deal
Tue, Sep 10 - Mon, Sep 16
2:05 pm - 11:20 amIAD-SNN
16h 15m2 stops
9:25 pm - 11:47 pmSNN-IAD
31h 22m2 stops
$906American Airlines
Find Deal
Wed, Sep 11 - Sun, Sep 15
8:40 pm - 4:10 pmIAD-SNN
14h 30m2 stops
9:25 pm - 3:40 pmSNN-IAD
23h 15m2 stops
$910Aer Lingus
Find Deal
Thu, Sep 5 - Fri, Sep 13
8:40 pm - 8:35 pmIAD-SNN
18h 55m2 stops
9:25 pm - 3:40 pmSNN-IAD
23h 15m2 stops
$925Aer Lingus
Find Deal
Wed, Sep 25 - Tue, Oct 1
5:55 pm - 11:20 amIAD-SNN
12h 25m1 stop
9:25 pm - 3:35 pmSNN-IAD
23h 10m1 stop
$1,016British Airways
Find Deal
Mon, Sep 23 - Wed, Oct 2
5:55 pm - 11:20 amIAD-SNN
12h 25m1 stop
9:25 pm - 3:40 pmSNN-IAD
23h 15m2 stops
$1,025British Airways
Find Deal
Mon, Sep 23 - Mon, Sep 30

Flights from Dulles Intl to Shannon - Travel Insights & Trends

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

What is the cheapest month to fly from Washington, D.C. Dulles Intl Airport to Shannon?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights from Washington, D.C. Dulles Intl Airport to Shannon, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.
The cheapest month for flights from Washington, D.C. Dulles Intl Airport to Shannon is March, where tickets cost $701 on average. On the other hand, the most expensive months are November and July, where the average cost of tickets is $1,544 and $1,390 respectively.

Good to know

Low season

January

High season

September

Cheapest flight

$388
Best time to beat the crowds with an average 21% drop in price.
Most popular time to fly and prices are also 17% lower on average.
Flight from Washington Dulles Airport to Shannon

When to book flights from Dulles Intl to Shannon

Are your dates flexible? Find out the best times to travel from Dulles Intl 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 Washington Dulles Airport to Shannon flights

  • What is the cheapest flight from Washington, D.C. Dulles Intl Airport to Shannon?

    In the last 3 days, the lowest price for a flight from Washington, D.C. Dulles Intl Airport to Shannon was $388 for a one-way ticket and $828 for a round-trip.

  • Do I need a passport to fly between Washington Dulles Airport and Shannon?

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

  • Which airports will I be using when flying from Washington Dulles Airport to Shannon?

    When flying out of Washington Dulles Airport you will be using Washington, D.C. Dulles Intl. You will be landing at Shannon, also known as Shannon.

  • Which aircraft models fly most regularly from Washington Dulles Airport to Shannon?

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

  • Which airline alliances offer flights from Washington Dulles Airport to Shannon?

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

  • Which is the best airline for flights from Washington, D.C. to Shannon, United Airlines or Aer Lingus?

    The two airlines most popular with KAYAK users for flights from Washington, D.C. to Shannon are United Airlines and Aer Lingus. With an average price for the route of $1,068 and an overall rating of 7.3, United Airlines is the most popular choice. Aer Lingus is also a great choice for the route, with an average price of $972 and an overall rating of 7.2.

  • How does KAYAK find such low prices on flights from Washington Dulles Airport 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 Washington Dulles Airport to Shannon.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Shannon from Washington Dulles Airport 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 Washington Dulles Airport 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 Washington Dulles Airport with another airline. Booking your flights between Washington Dulles Airport 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 Washington Dulles Airport 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 Washington Dulles Airport up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

Top 3 airlines serving from Dulles Intl to Shannon

 
See real verified KAYAK customer reviews for airlines flying from Washington, D.C. 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 Dulles Intl 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.
7.3
United AirlinesOverall score based on 11125 reviews
7.2Comfort
6.7Food
8.1Crew
7.7Boarding
7.1Entertainment
Airline reviews

Food was terrible Not many options Stewards dont care Delay

2.0 MediocreAnonymous, Apr 2024IAD - FRA
Read more about United Airlines reviews

Food was terrible Not many options Stewards dont care Delay

The ride was good but no food ot entertainment hence, it was just over an hour flight.

they made me check my carryon. There was space in the overhead bins.

The plane was delayed 2 hours. The wifi did not work. The seat in first class was not comfortable because the bottom felt like it lost all of its padding. And I did not like when the flight attendant made me wait at my seat to use the bathroom and didn't tell me why. If there were too many people using the 1st Class bathroom, she should have told me to go in the back, coach bathrooms. I guess I have to feel fortunate that they found 2 local pilots to still fly the plane tonight after the original pilots ended up at an airport 60 miles away due to high winds.

The crew were really great, but the 4 hour delay in small chunks was the worst.

Every experience was good except for the lack of comfort in those economy seats. I never had knee pain until that flight. Those seats are uncomfortable.

I bought internet for the flight. Don’t waste your money. I wasn’t able to download a 1 Mb file from Google Docs during a 3-4 hr period. You can only use WhatsApp and email if you are willing to wait.

Just a crappy airline. The same every time. You feel you are a cow on a farm. You are being being whipped and pulled.

Wasn’t very crowded. Seamless processes. No issues traveling with two little kids.

Kayak, the site I went through to book our flight, sent very unclear emails about flight changes. Kayak was incredibly unhelpful in their communications with me about this, promising to work on resolving the issue, and failing to do so. As a result, I needed to get a hotel in Brussels and am now in the process of trying to get reimbursed. On the other hand, the flight personnel in Brussels were very helpful, taking time to look into the issue and determine if they could help. I am very grateful for them and have no problems with the airline. For Kayak, however, I will never use it again and will never recommend it to anyone, and will even discourage people who consider going through that site. My worst experience ever....

Are Longus was fine. I booked thru Kayak and was unable to get my business class seat early. Sat next to galley. Crew forgot to wake me for breakfast.

I was pleasantly surprised - it has been awhile since I traveled with them - other than being delayed leaving Malaga everything ran very smoothly- yes I would travel with aer Lingus again and yes I would recommended

I loved how they arrange boarding (starting with people seated in back and moving to the front). Flight crew was very polite and welcoming. Seating was ok, I felt like there was enough leg space however it is noticeable when the passenger in front of you sets their seat back.

Flight staff very friendly and helpful where possible. Late flight and travelling with young child, cabin lights remained on for the duration of the flight which was a little disappointing considering the time of the flight. Overall very happy to travel with Aer Lingus.

Nice to be on a flight that wasn't fully booked so there were only two of us in the three seat row.

The only problem was there are games on the entertaiment system. The guy behind me played poker the entire time and poking the back of my seat. I hope they remove these.

Delayed due to weather... fine. But then the board us. Rows 15 and back had to go down the stairs and back up the back stair entrance to the plane. No assistance offered. Then they inform us that we are delayed for paperwork for an hour. So why did we board? Then, about 45min later they inform us that it'll be another 60-90mins. Really? No wifi, no seat entertainment, no drink or snacks offered. And we were not allowed to deboard.

Great travel. Wonderful experience. Hope to do it again in the near future. God willing

Aer Lingus doesn't have plug ins for devices at each seat. They also did not give me a dairy free meal as requested and confirmed by staff. It was as if I had not requested anything. Otherwise, they were great!

There were a lot of empty rows. As a single passenger I should not have been seated with 2 others. The WiFi didn’t work. The Kosher meal was awful.

We missed the flight to Barcelona because the flight from Baltimore was delayed. We flew on Vueling VW6653. Our luggage didn’t arrive. Please help us get our luggage. We are staying at Hotel Gran Via in Barcelona

The seats were tiny, being of a fairly petite build, I don’t usually expect to feel crammed and cramped in a seat, but I definitely was on this flight. I couldn’t even bend over to get anything out from under the seat in front and getting up to go to the bathroom at night with the seat backs reclined was nearly impossible. I had to do gymnastics to get over and out. For an airline that does long flights overnight, it’s kind of ridiculous.

Not connecting flights. Missed my flight from Dublin to Liverpool because I arrived at Dublin one hour too late. For this mistake, they offered me a flight from Dublin to Manchester. Thats great and all, but I waste time and money to commute to Liverpool. Be sure to check the time of your connecting flights, because they sure don’t when they sell it to you

Excellent! Great flight attendants, good food (in business class, at least), very comfortable. Touchscreen and remote wasn’t great.

In economy and food was ok, but with limited leg space (and I was in a 2 seat configuration) it was difficult to eat with a tiny seat tray. I spilt wine on my trousers. First time on British Air (I usually fly Turkish Air) and in a 777. Heathrow was pleasant but changing terminals awkward.

Starting with the flight Cairo to London the plain was so poor no entertainment at all uncomfortable seats although it’s 5 hours long,then an American airline plain took me from London to Miami it was a bad experience the crew most of flight time not available and they asked us to help our selves for any snacks if we need. From Miami to London actually was perfect flight with a huge plain and perfect crew but from London to Cairo was horrible plain with stiff fixed seats not movable no entertainment or wi fi very poor Menu which is unacceptable for a business class

I've done hundreds of flights in my life, and this flight was one of the best I've ever taken, From beginning to end, everything went smoothly, professionally, and with a smile and friendly attitude from all employees I interacted with. The food was delicious (and free), as were the drinks. There was just a genial and effective way in the way that British Airways organized the flight -that reminded of days in the 70's, 80's, and 90's, when flying was a fun, and exciting adventure. I enjoyed and had confidence in the abilities of the flight crew, I'll be flying British Airways several more times this summer. Thank you so much for the great experience! Cheryl Olso

My baggage did not arrived with me. Took 3 days to get it after so may calls and follow up

Terrible! I missed my flight to my final destination and British airlines and American Airlines keep pointing fingers on each other’s. Nobody wants to take responsibility

Terrible. Flight was 3 hours delayed and I missed my other flight to my final destination

Book cheap flights from Washington, D.C. to Shannon

Recent one-way flight deals

 
Only flying one-way? Below are some of the best one-way flight deals from Washington, D.C. to Shannon found on KAYAK in the last 72 hours.
8/19Mon
3 stops
55h 35mIAD-SNN
$388
8/19Mon
2 stops
14h 40mIAD-SNN
$410
8/19Mon
1 stop
16h 50mIAD-SNN
$653
6/13Thu
2 stops
20h 45mIAD-SNN
$670
6/13Thu
3 stops
26h 35mIAD-SNN
$693
6/13Thu
1 stopUnited Airlines
33h 00mIAD-SNN
$1,152

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Last minute flights from Dulles Intl to Shannon

Last minute flight, train and bus deals

 
These last-minute flight deals are the cheapest flights found on KAYAK in the last 72 hours for flights from Washington, D.C. to Shannon that are departing in the next 10 days.
5/9Thu
multi-stopBritish Airways
31h 35mIAD-SNN
5/16Thu
multi-stopBritish Airways
28h 05mSNN-IAD
$1,054
5/9Thu
multi-stopBritish Airways
31h 35mIAD-SNN
5/16Thu
multi-stopBritish Airways
31h 36mSNN-IAD
$1,071
5/9Thu
multi-stopAmerican Airlines
49h 18mIAD-SNN
5/16Thu
multi-stopAmerican Airlines
31h 36mSNN-IAD
$1,117
5/9Thu
multi-stop
35h 30mIAD-SNN
5/16Thu
multi-stop
25h 15mSNN-IAD
$1,445
5/9Thu
multi-stop
17h 45mIAD-SNN
5/16Thu
multi-stop
25h 15mSNN-IAD
$1,826

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Washington Dulles Airport - Shannon Flights

Departure:

Washington Dulles Airport (IAD)United States

Destination:

Shannon (SNN)Ireland

Return flight deals:

Shannon - Washington Dulles Airport

Cabin classes:

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