WAS - SNN

$250 Find Cheap Flights from Washington, D.C. to Shannon - Compare and Save

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 9/1. 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

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Everything you should know

Cheapest round-trip
$732
United Airlines
Mon 9/21Tue 10/6
IAD - SNN • 1 stop
Cheapest one-way
$250
Multiple Airlines
Tue 9/1
IAD - SNN • 3 stops
Top airlines
Cheapest • from $732 (round-trip)
Best reviews • 7.8 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between Washington, D.C. and Shannon. You'll need at least 1 connection.
Insights
Insights
Insights
Insights
Top layover airports
Cheapest • Avg $749 (round-trip)
Shortest trip • 8h 55m (one-way)
Insights
Insights
Insights
Insights
When to travel
Cheapest • 100% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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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

Mon, Sep 21 - Tue, Oct 6
United Airlines Logo
6:13 am - 7:30 am
IAD
-
SNN
20h 17m
1 stop
United Airlines Logo
12:30 pm - 11:25 am
SNN
-
IAD
27h 55m
1 stop
$732United Airlines
Mon, Sep 21 - Tue, Oct 6
United Airlines Logo
8:25 am - 7:30 am
BWI
-
SNN
18h 05m
1 stop
United Airlines Logo
12:30 pm - 10:59 pm
SNN
-
BWI
15h 29m
2 stops
$735United Airlines
Mon, Sep 21 - Tue, Oct 6
United Airlines Logo
1:10 pm - 7:30 am
IAD
-
SNN
13h 20m
1 stop
United Airlines Logo
12:30 pm - 10:59 pm
SNN
-
IAD
15h 29m
1 stop
$735United Airlines
Tue, Sep 22 - Wed, Sep 30
Multiple Airlines Logo
8:25 pm - 1:40 pm
IAD
-
SNN
12h 15m
1 stop
Multiple Airlines Logo
6:05 am - 10:27 am
SNN
-
IAD
33h 22m
2 stops
$742Multiple Airlines
Tue, Sep 22 - Tue, Sep 29
Multiple Airlines Logo
8:25 pm - 1:40 pm
IAD
-
SNN
12h 15m
1 stop
Multiple Airlines Logo
1:00 pm - 10:27 am
SNN
-
IAD
50h 27m
2 stops
$749Multiple Airlines
Tue, Sep 22 - Sun, Oct 4
Multiple Airlines Logo
8:25 pm - 1:40 pm
IAD
-
SNN
12h 15m
1 stop
Multiple Airlines Logo
7:30 am - 10:17 am
SNN
-
IAD
31h 47m
2 stops
$758Multiple Airlines
Tue, Sep 1 - Fri, Sep 11
Delta Logo
7:15 pm - 11:10 am
IAD
-
SNN
10h 55m
1 stop
Delta Logo
1:05 pm - 12:41 am
SNN
-
IAD
16h 36m
2 stops
$834Delta
Wed, Aug 26 - Fri, Sep 11
Delta Logo
12:30 pm - 11:10 am
IAD
-
SNN
17h 40m
2 stops
Delta Logo
1:05 pm - 12:41 am
SNN
-
IAD
16h 36m
2 stops
$834Delta
Wed, Sep 23 - Tue, Sep 29
American Airlines Logo
5:45 pm - 11:20 am
IAD
-
SNN
12h 35m
1 stop
American Airlines Logo
7:30 am - 8:20 pm
SNN
-
IAD
17h 50m
1 stop
$940American Airlines
Wed, Oct 21 - Wed, Oct 28
American Airlines Logo
7:15 pm - 11:20 am
IAD
-
SNN
11h 05m
1 stop
American Airlines Logo
7:50 am - 8:55 pm
SNN
-
IAD
17h 05m
1 stop
$945American Airlines
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.

How much is a round-trip flight from Washington, D.C. to Shannon, Clare?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Washington, D.C. to Shannon, Clare departing in September.

Flight prices are typical for this route right now.

Flights to Shannon, Clare from Washington, D.C. usually cost between $536 and $737 in September.
The lowest price found in the past 5 days was $732 on United Airlines (Sep 21-Oct 6).

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 February, where tickets cost $0 (return) on average. On the other hand, the most expensive months are June and April, where the average cost of round-trip tickets is $1,339 and $1,007 respectively.

Good to know

Low season

November

Cheapest flight

$250
Best time to beat the crowds with an average 30% drop in price.
Most popular time to fly and prices are also 29% lower on average.
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 5 days, the lowest price for a flight from Washington, D.C. to Shannon was $250 for a one-way ticket and $732 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, Delta or United Airlines?

    The two airlines most popular with KAYAK users for flights from Washington, D.C. to Shannon are Delta and United Airlines. With an average price for the route of $633 and an overall rating of 7.8, Delta is the most popular choice. United Airlines is also a great choice for the route, with an average price of $823 and an overall rating of 7.4.

  • 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 3 airlines serving 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.
7.8
DeltaOverall score based on 8487 reviews
8.5Crew
7.8Comfort
7.2Food
8.1Boarding
7.8Entertainment
Airline reviews

No tv. No free wifi. They need to ipgrade these planes - especially on a 2 hour flight.

6.0 GoodDavid, Jul 2026
DAL - ATL
Read more Delta reviews

No tv. No free wifi. They need to ipgrade these planes - especially on a 2 hour flight.

Flight was delayed for about an hour but overall good experience

The gentleman at the gate I think his name is RIE was exceptional

This flight was no comparison to our prior flight. I'm thinking it all has to do with the age of the aircraft.

2 of the seats in row 31 the entertainment system was not working, and one seat the tray table did not go all the way down. Flight arrived early and departed on time which was great.

Waited at the usual crowded gate at DCA where one ends up standing up because there aren't enough seats.

Delayed take-off. Very small plane so very scary with lots of bumps during the flight. Would never fly Delta on short flights in small 80 seaters plane again! Felt relieved when landed.

Inexpensive, got an exit row aisle aeat with no middle passenger, bought a great breakfast sandwich, flight comfortable & arrived ahead of schedule.

I wouldn't say I liked being forced to check my small roller bag at the gate; too many people had bags and were in a higher boarding group.

715PM departure was 2.5 hours late. Received hotel & food voucher but after we already booked a room. Entire team just seemed like they were 2-3 steps behind in execution, and notifcations.

My flight was delayed so bad i missed u it so i just said never mind

Delayed 2 hours while stuck on the aircraft. If the luggage was properly loaded the first time we probably wouldn’t have been delayed at all

1. Everything was satisfactory concerning the flight. 2. Can't think of what could be better right now.

Onboard staff was courteous, helpful, responsive and friendly. The boarding process was disorganized, poorly communicated, and disheveled. Gate agents were yelling instead of using the PA system, didn’t communicate the timing delay of our flight, and created an atmosphere of chaos rather than order and communication. As far as I know, there was no reason for their. I would hate to see how it operated under extreme conditions. I’ve never seen United Airlines operations in such a state.

The flight did not have its customary snacks during the flight. Apparently they were never loaded on the plane.

Worst service- attendants dont want to help and sat us in front of bathroom

We sat on the hot plane for ours with very conflicting messages. Some (most?) of this may be due to the flight control staff, but we were also repeatedly getting "we are leaving"/"we are not" messages. It was very uncomfortable

Staff could’ve been a little more cordial. The men were much more friendlier than the women. My daughter and I also missed the 2nd to last meal as we were sleeping but that is on us.

Like: departed and arrived on time. Unlike: Food options for purchase allways bad, 1 of 2 of the crew members not very friendly at all. Seats and leg room aweful. At this point I am thinking on switching to AA.

The Economy Plus rows weren’t as roomy as expected, and the meal service left a lot to be desired for.

Patrons with larger bags were asked to check the bags when boarding. Seems like the most effective, and least costly way, way to successfully use the cramped space.

They cancelled our flight two times after rebooking us for a later flight. We never got on the plane. We found another solution by driving.

Mostly great. Only issue was with the WiFi. Halfway through the flight it was spotty and I was unable to work as I planned. This impacted my work products as I am traveling for business and it was an unexpected hindrance which was inconvenient. Flight here was amazing. For a 5 hour flight something more than a Biscoff would be nice but I’m just swinging at windmills I guess…

Delayed boarding because a flight attendant couldn't find the gate...sat on the plane for over an hour at the gate because AA couldn't get one of the planes behind us to move

The seats were extremely cramped, with very little legroom or personal space. There was no room left in the overhead bins for a backpack, and the space under the seat in front was so limited that I could barely fit my bag underneath. Overall, the seating arrangement felt very uncomfortable and overcrowded.

As always, most AA flights that we fly are almost ALWAYS delayed and that too multiple times. Very frustrating

The small flights with Valet Luggage has a poor service

Overall a good experience, however Wifi was not working on the flight.

THe flight was an hour late. You got us on the plan and we sat on the ground for 45 minutes with no information from the pilot whatsoever. Worst flight this year.

Going non stop to lax like I paid for. Not stopping in MCI for gas. Too long of delays

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

Information on your arrival and departure airports