$423 Cheap Flights from Washington (IAD) to Shannon (SNN)

View $423 flight on Mon, May 18, 2026Opens in a new window

Popular airlines from Washington Dulles Intl. Airport (IAD) to Shannon Airport (SNN)

Cheap Flights from Washington to Shannon (IAD-SNN)

Prices were available within the past 7 days and start at $423 for one-way flights and $563 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Sun, Apr 26 - Thu, May 14
IAD
Washington
SNN
Shannon
$563 Roundtrip, found 5 days ago
$563
Roundtrip
found 5 days ago
Select United flight, departing Sun, Apr 26 from Washington to Shannon, returning Thu, May 14, priced at $563 found 5 days ago
United
Wed, Apr 29 - Thu, May 14
IAD
Washington
SNN
Shannon
$574 Roundtrip, found 5 days ago
$574
Roundtrip
found 5 days ago
Select United flight, departing Wed, Apr 29 from Washington to Shannon, returning Thu, May 14, priced at $574 found 5 days ago
United
Sun, Apr 5 - Wed, Apr 15
IAD
Washington
SNN
Shannon
$586 Roundtrip, found 2 days ago
$586
Roundtrip
found 2 days ago
Select United flight, departing Sun, Apr 5 from Washington to Shannon, returning Wed, Apr 15, priced at $586 found 2 days ago
United
Sat, Apr 4 - Tue, Apr 14
IAD
Washington
SNN
Shannon
$592 Roundtrip, found 5 days ago
$592
Roundtrip
found 5 days ago
Select United flight, departing Sat, Apr 4 from Washington to Shannon, returning Tue, Apr 14, priced at $592 found 5 days ago
Lufthansa
Wed, Aug 12 - Tue, Aug 25
IAD
Washington
SNN
Shannon
$602 Roundtrip, found 3 days ago
$602
Roundtrip
found 3 days ago
Select Lufthansa flight, departing Wed, Aug 12 from Washington to Shannon, returning Tue, Aug 25, priced at $602 found 3 days ago
United
Tue, Apr 7 - Sat, Apr 18
IAD
Washington
SNN
Shannon
$613 Roundtrip, found 2 days ago
$613
Roundtrip
found 2 days ago
Select United flight, departing Tue, Apr 7 from Washington to Shannon, returning Sat, Apr 18, priced at $613 found 2 days ago
United
Tue, Apr 7 - Sat, Apr 18
IAD
Washington
SNN
Shannon
$624 Roundtrip, found 2 days ago
$624
Roundtrip
found 2 days ago
Select United flight, departing Tue, Apr 7 from Washington to Shannon, returning Sat, Apr 18, priced at $624 found 2 days ago
American Airlines
Tue, Mar 3 - Tue, Mar 10
IAD
Washington
SNN
Shannon
$689 Roundtrip, found 10 hours ago
$689
Roundtrip
found 10 hours ago
Select American Airlines flight, departing Tue, Mar 3 from Washington to Shannon, returning Tue, Mar 10, priced at $689 found 10 hours ago
Air Canada
Wed, Nov 12 - Wed, Nov 26
IAD
Washington
SNN
Shannon
$689 Roundtrip, just found
$689
Roundtrip
just found
Select Air Canada flight, departing Wed, Nov 12 from Washington to Shannon, returning Wed, Nov 26, priced at $689 just found
British Airways
Wed, Nov 26 - Wed, Dec 3
IAD
Washington
SNN
Shannon
$691 Roundtrip, found 8 hours ago
$691
Roundtrip
found 8 hours ago
Select British Airways flight, departing Wed, Nov 26 from Washington to Shannon, returning Wed, Dec 3, priced at $691 found 8 hours ago

Find the cheapest month to fly from Washington (IAD) to Shannon (SNN)

August is typically the cheapest month to fly

From $535 - $1,215 per traveler.

Alternative airports near Shannon

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Shannon Airport SNN. Cheapest and Closest option available. Average driving time to city center is 7 minutes. Flights from $795
SNN
Shannon Airport
CheapestClosest
Average driving time to city center7 min
Flights from $795

Frequently asked questions

How much does a flight from Washington Dulles Intl. Airport (IAD) to Shannon Airport (SNN) cost?
Lock in a cheap one-way flight from $423 or cheap return flight from $563 from Washington Dulles Intl. Airport (IAD) to Shannon Airport (SNN) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight deals on this route.
What is the cheapest month to fly from Washington Dulles Intl. Airport (IAD) to Shannon Airport (SNN)?
The cheapest month to fly from IAD to SNN is April, when demand is low. Off-peak months are often when you'll find lower airfares between these airports.
What is the cheapest airline that flies from Washington Dulles Intl. Airport (IAD) to Shannon Airport (SNN)?
Expedia's filter tool lets you easily compare airlines, flight times and baggage options all in one place. Tailor the search to your trip, then sort by "Price (lowest to highest)" to see which carrier offers the cheapest IAD to SNN flight.
How many flights per day from Washington Dulles Intl. Airport (IAD) to Shannon Airport (SNN)?
You'll have to book a flight with a layover when traveling from Washington Dulles Intl. Airport (IAD) to Shannon Airport (SNN). There are no daily direct flights on this route. However, just filter your search to include one or more stops to discover an option that works for you.
What day of the week has the most flights from IAD to SNN?
Usually you'll find the widest variety of flight choices on a Friday. Tuesdays are often the quietest.* But this can change based on the airline, time of year and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Washington Dulles Intl. Airport (IAD) to Shannon Airport (SNN)?
Book a flight from Washington Dulles Intl. Airport (IAD) to Shannon Airport (SNN) that takes off before 3 PM to reduce the risk of cancellations and delays. Later departures are on average 22% more likely to be canceled.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Washington Dulles Intl. Airport (IAD) to Shannon Airport (SNN) last-minute?
Last-minute fares from IAD to SNN are usually more expensive. To secure the lowest rates, start searching for flights ahead of time. That being said, if your travel plans are flexible, you may land a cheap ticket right before your trip.
Is it cheaper to book an IAD to SNN flight and hotel package?
Opting for an IAD to SNN flight and hotel package tends to be cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your trip in one place. Select from our wide range of accommodations and then add activities, car rentals and flights to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Washington Dulles Intl. Airport (IAD) to Shannon Airport (SNN)?
Typically, it's possible to reschedule or cancel your IAD to SNN flight. However, for bookings made more than 24 hours ago, additional fees may apply. Refer to your airline's policies in your itinerary to see what changes are possible and if any costs are involved. You'll also find more details on our Customer Service portal.

Travel information

Origin airport
Washington Dulles Intl.
Destination airport
Shannon
Airlines serving
Aer Lingus, Air Canada, Air France, American Airlines, British Airways, Delta, Lufthansa, United
Roundtrip price
$562
Distance
3297 mi

Book with confidence

Washington to Shannon Flights

The cheapest times to fly from Washington to Shannon

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Washington to Shannon are during the month of April. You can find some of the cheapest flights from Washington to Shannon with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Washington to Shannon

Sunday is one of the best days to book for cheap flights from Washington to Shannon: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Washington to Shannon

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Washington to Shannon in 2025. You can also book with separate airlines for your outbound and return journeys, from $423 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Washington to Shannon flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Washington to Shannon airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Washington to Shannon Flights

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*Available to One Key members.