WAS - SNN

$427 Find Cheap Flights from Washington, D.C. 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 Washington, D.C. to Shannon departing on 1/5. 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 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
Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 24% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Bundle and saveSave money when you bundle your flight + hotel.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Everything you should know

Cheapest round-trip
$488
American Airlines
Tue 1/13Tue 1/20
BWI - SNN • 1 stop
Cheapest one-way
$427
Aer Lingus
Mon 1/5
IAD - SNN • 2 stops
Top airlines
American Airlines
Cheapest • from $488 (round-trip)
United Airlines
Best reviews • 7.4 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to travel
August
Cheapest • 21% price drop
May
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
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 Washington, D.C. to Shannon (WAS-SNN)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Washington, D.C. 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 Washington, D.C. to Shannon

Tue, Jan 13 - Tue, Jan 20
American Airlines Logo
8:35 pm - 4:45 pmBWI-SNN
15h 10m1 stop
American Airlines Logo
7:50 am - 6:45 pmSNN-BWI
15h 55m1 stop
$488American Airlines
Find Deal
Tue, Jan 13 - Tue, Jan 20
American Airlines Logo
6:20 pm - 11:30 amIAD-SNN
12h 10m1 stop
American Airlines Logo
7:50 am - 7:55 pmSNN-IAD
17h 05m1 stop
$488American Airlines
Find Deal
Tue, Jan 13 - Tue, Jan 20
American Airlines Logo
6:31 pm - 4:45 pmBWI-SNN
17h 14m2 stops
American Airlines Logo
7:50 am - 6:45 pmSNN-BWI
15h 55m1 stop
$494American Airlines
Find Deal
Sun, Jan 11 - Tue, Jan 27
American Airlines Logo
6:20 pm - 11:30 amIAD-SNN
12h 10m1 stop
American Airlines Logo
7:50 am - 11:12 pmSNN-IAD
20h 22m2 stops
$495American Airlines
Find Deal
Thu, Jan 22 - Tue, Jan 27
Multiple Airlines Logo
5:30 pm - 6:05 pmIAD-SNN
19h 35m2 stops
Multiple Airlines Logo
5:30 pm - 9:00 pmSNN-IAD
32h 30m2 stops
$553Multiple Airlines
Find Deal
Tue, Jan 13 - Tue, Jan 20
Multiple Airlines Logo
7:40 pm - 9:30 pmBWI-SNN
20h 50m2 stops
Multiple Airlines Logo
5:30 pm - 6:40 pmSNN-BWI
30h 10m2 stops
$623Multiple Airlines
Find Deal
Tue, Jan 13 - Tue, Jan 20
British Airways Logo
5:05 pm - 11:30 amIAD-SNN
13h 25m2 stops
British Airways Logo
8:05 pm - 3:35 pmSNN-IAD
24h 30m2 stops
$647British Airways
Find Deal
Tue, Jan 13 - Tue, Jan 20
British Airways Logo
6:20 pm - 11:30 amIAD-SNN
12h 10m1 stop
British Airways Logo
5:30 pm - 3:35 pmSNN-IAD
27h 05m2 stops
$649British Airways
Find Deal
Mon, Jan 12 - Mon, Jan 19
Air Canada Logo
6:00 am - 11:30 amDCA-SNN
24h 30m2 stops
Air Canada Logo
5:30 pm - 10:23 amSNN-DCA
45h 53m2 stops
$652Air Canada
Find Deal
Sun, Jan 11 - Tue, Jan 27
Air Canada Logo
4:10 pm - 11:30 amDCA-SNN
14h 20m2 stops
Air Canada Logo
7:50 am - 9:58 pmSNN-DCA
19h 08m2 stops
$658Air Canada
Find Deal
Booking Insights

KAYAK's insights & trends for Washington, D.C. to Shannon flights

Get data-powered insights and trends into flights from Washington, D.C. 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. to Shannon?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Washington, D.C. 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. to Shannon is August, where tickets cost $693 (return) on average. On the other hand, the most expensive months are June and October, where the average cost of round-trip tickets is $1,141 and $936 respectively.

Good to know

Low seasonDecember
Cheapest flight$427
Best time to beat the crowds with an average 20% drop in price.
Most popular time to fly with an average 3% increase in price.
Flight from Washington Dulles Airport to Shannon

When to book flights from Washington, D.C. to Shannon

Are your dates flexible? Find out the best times to travel from Washington, D.C. 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 Washington, D.C. to Shannon

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

    In the last 3 days, the lowest price for a flight from Washington, D.C. to Shannon was $427 for a one-way ticket and $488 for a round-trip.

  • Do I need a passport to fly between Washington, D.C. and Shannon?

    Yes

  • Which airports will I be using when flying from Washington, D.C. to Shannon?

    Washington, D.C. is served by 2 major airports and there is only 1 main airport in Shannon. You will leave Washington, D.C. from one of these airports: Washington, D.C. Reagan-National or Washington, D.C. Dulles Intl. You will be arriving at Shannon.

  • Which aircraft models fly most regularly from Washington, D.C. to Shannon?

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

  • Which airline alliances offer flights from Washington, D.C. to Shannon?

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

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

    The two airlines most popular with KAYAK users for flights from Washington, D.C. to Shannon are United Airlines and American Airlines. With an average price for the route of $878 and an overall rating of 7.4, United Airlines is the most popular choice. American Airlines is also a great choice for the route, with an average price of $907 and an overall rating of 7.2.

  • How does KAYAK find such low prices on flights from Washington, D.C. 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, D.C. to Shannon.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Shannon from Washington, D.C. 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, D.C. 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, D.C. with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Washington, D.C. 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, D.C. up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airlines flying from Washington, D.C. 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 Washington, D.C. 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 9057 reviews
7.1Entertainment
8.1Crew
6.6Food
7.3Comfort
7.7Boarding
Airline reviews

Starlink wifi on the Embraer E175 is an excellent experience. I was able to connect and work from IAD all the way to approach into BTV.

10.0 ExcellentDavid, Nov 2025IAD - BTV
Read more United Airlines reviews

Starlink wifi on the Embraer E175 is an excellent experience. I was able to connect and work from IAD all the way to approach into BTV.

7 hours delayed due to operational issues on United’s end. Basically laziness.

Short flight but an "eager to help" crew made the journey more enjoyable!

During booking, I kept trying submitting my payment from the Mexican website and it didn't work. After I had the idea to change it to the Canadian website, it worked but I had to be charged the equivalent of 50 CAD more. I received the clear instruction that I would only be able to check-in at the airport and that it was impossible to select a seat 24 hours before departure, that I had to pay 144 CAD to do so, although not only was I able to check-in 24 hours before departure, but I could have selected my seats for free then. All in all, I almost threw $200 out the window due to misleading information. Besides, the app kept crashing, the information to get to the gate on the app was inaccurate, my gate was switched and I was only informed once in the air (luckily I had noticed the departure pannel), I was not addressed in my language beforehand and even if I tried I was immediately answered in English (which meant the crew understood but didn't want to answer accordingly), there was only one snack & beverage service on my medium haul flight and no beverage service on my short haul flight. To be fair, the planes were comfortable, the crew apart from the language issue was helpful, dynamic and engaging, the plane was clean and the directions were clear and direct. United has a lot of potential to be one of my favourite airlines, but the devil is in the details and a lot of them missed the target.

Better WiFi. I cannot understand that in 2025, United is so behind on a technology that is now a necessity and still painfully unreliable, slow and keeps disconnecting.

Great service on board. Boarding a bit slow due to process. Food was pretty average.

Very small cramped plane for an international flight. Everything else was good, but it was maybe the smallest comfort-wise I've ever been on for longer than 3-4 hours and the trip was 7.5

Flight was delayed 3 hours. No food and drink vouchers was provided. They offered a mini pretzel bag and water .

Staff was rude. Didn’t give water for 2 hours. Worst service

Was on time until within 1 hour of flight-how does that happen? Staff very friendly.

My flight was delayed about three hours. I got home at 3:30 in the morning very bad experience.

I like that the crew kept us informed but we moved back and forth from gate to gate before the aircraft arrived.

The flight was delayed multiple times, again no fault of American but again the extra cost, for everything makes it feel like a cheap airline! Especially when flights are outrageously expensive already

Horrible. Both legs of my flight were delayed more than 6 hours. No compensation, no screens on the plane, and the plane was not clean.

I had a positive experience on American. I'm blind and traveling with a guide dog and the flight attendants were so kind, friendly, and helpful towards us. They checked in on us during the flight and they made us feel comfortable and welcomed. There was an hour delay before depature, but overall the flight was a smooth ride. I appreciate that there were no issues on this long flight back home.

We were told the flight was delayed 5 times, then it was moved to the next day.

Flight delay was communicated before leaving for airport which caused it to be a non-event. Great flight and crew!

The flight attendant, a black woman with curly hair who sat near Row 21, was wonderful and kind.

It took way too long to diagnose and solve the problem of a broken crew member cabin seat. Though compensation for the volunteer who left the flight was very kind.

We fly American Airlines quite a bit. And we always fly business class when traveling internationally. We were a bit disappointed with the comfort of this particular plane as well as the entertainment options.

Everything you need to know for your flight from Washington, D.C. to Shannon

Information on your arrival and departure airports