$459 Cheap Flights from Shannon (SNN) to Washington (IAD)

View $459 flight on Wed, Jan 28, 2026Opens in a new window

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

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Cheap Flights from Shannon to Washington (SNN-IAD)

Prices were available within the past 7 days and start at $459 for one-way flights and $603 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

British Airways
Tue, Mar 3 - Tue, Mar 10
SNN
Shannon
IAD
Washington
$603 Roundtrip, found 1 day ago
$603
Roundtrip
found 1 day ago
Select British Airways flight, departing Tue, Mar 3 from Shannon to Washington, returning Tue, Mar 10, priced at $603 found 1 day ago
British Airways
Thu, Jan 8 - Sat, Jan 24
SNN
Shannon
IAD
Washington
$604 Roundtrip, found 2 days ago
$604
Roundtrip
found 2 days ago
Select British Airways flight, departing Thu, Jan 8 from Shannon to Washington, returning Sat, Jan 24, priced at $604 found 2 days ago
Aer Lingus
Fri, Feb 27 - Sat, Mar 7
SNN
Shannon
IAD
Washington
$622 Roundtrip, found 4 days ago
$622
Roundtrip
found 4 days ago
Select Aer Lingus flight, departing Fri, Feb 27 from Shannon to Washington, returning Sat, Mar 7, priced at $622 found 4 days ago
British Airways
Tue, Mar 3 - Tue, Mar 10
SNN
Shannon
IAD
Washington
$624 Roundtrip, found 1 day ago
$624
Roundtrip
found 1 day ago
Select British Airways flight, departing Tue, Mar 3 from Shannon to Washington, returning Tue, Mar 10, priced at $624 found 1 day ago
British Airways
Thu, Jan 8 - Sat, Jan 24
SNN
Shannon
IAD
Washington
$625 Roundtrip, found 2 days ago
$625
Roundtrip
found 2 days ago
Select British Airways flight, departing Thu, Jan 8 from Shannon to Washington, returning Sat, Jan 24, priced at $625 found 2 days ago
British Airways
Wed, Dec 10 - Wed, Dec 17
SNN
Shannon
IAD
Washington
$634 Roundtrip, found 6 days ago
$634
Roundtrip
found 6 days ago
Select British Airways flight, departing Wed, Dec 10 from Shannon to Washington, returning Wed, Dec 17, priced at $634 found 6 days ago
Aer Lingus
Tue, Mar 3 - Tue, Mar 10
SNN
Shannon
IAD
Washington
$657 Roundtrip, found 1 day ago
$657
Roundtrip
found 1 day ago
Select Aer Lingus flight, departing Tue, Mar 3 from Shannon to Washington, returning Tue, Mar 10, priced at $657 found 1 day ago
Lufthansa
Sat, Apr 11 - Sat, Apr 18
SNN
Shannon
IAD
Washington
$681 Roundtrip, found 15 hours ago
$681
Roundtrip
found 15 hours ago
Select Lufthansa flight, departing Sat, Apr 11 from Shannon to Washington, returning Sat, Apr 18, priced at $681 found 15 hours ago
American Airlines
Thu, Jan 8 - Sat, Jan 24
SNN
Shannon
IAD
Washington
$703 Roundtrip, found 2 days ago
$703
Roundtrip
found 2 days ago
Select American Airlines flight, departing Thu, Jan 8 from Shannon to Washington, returning Sat, Jan 24, priced at $703 found 2 days ago
United
Sat, Apr 11 - Sat, Apr 18
SNN
Shannon
IAD
Washington
$719 Roundtrip, found 15 hours ago
$719
Roundtrip
found 15 hours ago
Select United flight, departing Sat, Apr 11 from Shannon to Washington, returning Sat, Apr 18, priced at $719 found 15 hours ago

Frequently asked questions

How much does a flight from Shannon Airport (SNN) to Washington Dulles Intl. Airport (IAD) cost?
Lock in a cheap one-way flight from $459 or cheap return flight from $603 from Shannon Airport (SNN) to Washington Dulles Intl. Airport (IAD) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight offers on this route.
What is the cheapest month to fly from Shannon Airport (SNN) to Washington Dulles Intl. Airport (IAD)?
Flying in March may help you find better deals, as it's the cheapest month for flights between SNN and IAD. You'll usually find the lowest fares during off-peak months.
What is the cheapest airline that flies from Shannon Airport (SNN) to Washington Dulles Intl. Airport (IAD)?
To find the cheapest airline flying from SNN to IAD, use Expedia's filter tool. Tailor your search based on your travel style, such as preferred carriers and cabin class. You can then sort your results by "Price (lowest to highest)" to list the most affordable options first.
How many flights per day from Shannon Airport (SNN) to Washington Dulles Intl. Airport (IAD)?
You'll need to book a flight with a layover if you're traveling from Shannon Airport (SNN) to Washington Dulles Intl. Airport (IAD). There are no daily direct flights on this route. However, just filter your search to include one or more stops to find an option that works for you.
What day of the week has the most flights from SNN to IAD?
You'll generally find Tuesday the quietest day for flights, while Fridays tend to be the busiest.* However this can change from season to season and during peak travel times or public holidays.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Shannon Airport (SNN) to Washington Dulles Intl. Airport (IAD)?
Choose a flight from Shannon Airport (SNN) to Washington Dulles Intl. Airport (IAD) that takes off before 3 PM to reduce the risk of delays and cancellations. Departures after this time have a 22% higher chance of being canceled, on average.**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 Shannon Airport (SNN) to Washington Dulles Intl. Airport (IAD) last-minute?
Booking your plane ticket from SNN to IAD shortly before your journey is usually more expensive. However, if there's some wiggle room with your travel times and dates, you could grab a cheap last-minute fare.
Is it cheaper to book a SNN to IAD flight and hotel package?
Compared with arranging hotels and flights separately, booking a SNN to IAD flight and hotel package with Expedia could lead to significant savings. Better still, managing everything in one place takes the hassle out of travel planning. Simply secure your flights and select from our extensive range of stays, then personalize your trip with extras like activities and car rentals.
Can I cancel or change the date of my flight from Shannon Airport (SNN) to Washington Dulles Intl. Airport (IAD)?
If you booked your SNN to IAD flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the fare type you purchased, additional charges may apply for changes after that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, go to our Customer Service portal if you want more information.

Travel information

Origin airport
Shannon
Destination airport
Washington Dulles Intl.
Airlines serving
Aer Lingus, American Airlines, British Airways, United
Roundtrip price
$602
Distance
3297 mi

Book with confidence

Shannon to Washington Flights

The cheapest times to fly from Shannon to Washington

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 Shannon to Washington are during the month of March. You can find some of the cheapest flights from Shannon to Washington with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Shannon to Washington

Sunday is one of the best days to book for cheap flights from Shannon to Washington: 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 Shannon to Washington

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 Shannon to Washington in 2025. You can also book with separate airlines for your outbound and return journeys, from $459 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 Shannon to Washington 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 Shannon to Washington 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.

 

Shannon to Washington Flights

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