$400 Cheap Flights from Dublin (DUB) to Seattle (SEA)

View $400 flight on Sun, May 3, 2026Opens in a new window

Popular airlines from Dublin Airport (DUB) to Seattle-Tacoma International Airport (SEA)

Cheap Flights from Dublin to Seattle (DUB-SEA)

Prices were available within the past 7 days and start at $400 for one-way flights and $495 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Fri, Jan 30 - Fri, Feb 6
DUB
Dublin
SEA
Seattle
$495 Roundtrip, found 1 day ago
$495
Roundtrip
found 1 day ago
Select American Airlines flight, departing Fri, Jan 30 from Dublin to Seattle, returning Fri, Feb 6, priced at $495 found 1 day ago
American Airlines
Thu, Feb 12 - Fri, Feb 20
DUB
Dublin
SEA
Seattle
$495 Roundtrip, found 4 days ago
$495
Roundtrip
found 4 days ago
Select American Airlines flight, departing Thu, Feb 12 from Dublin to Seattle, returning Fri, Feb 20, priced at $495 found 4 days ago
Icelandair
Thu, Jan 15 - Wed, Jan 21
DUB
Dublin
SEA
Seattle
$496 Roundtrip, found 15 hours ago
$496
Roundtrip
found 15 hours ago
Select Icelandair flight, departing Thu, Jan 15 from Dublin to Seattle, returning Wed, Jan 21, priced at $496 found 15 hours ago
British Airways
Thu, Jan 15 - Wed, Jan 21
DUB
Dublin
SEA
Seattle
$497 Roundtrip, found 15 hours ago
$497
Roundtrip
found 15 hours ago
Select British Airways flight, departing Thu, Jan 15 from Dublin to Seattle, returning Wed, Jan 21, priced at $497 found 15 hours ago
British Airways
Mon, Mar 2 - Tue, Mar 10
DUB
Dublin
SEA
Seattle
$498 Roundtrip, found 5 days ago
$498
Roundtrip
found 5 days ago
Select British Airways flight, departing Mon, Mar 2 from Dublin to Seattle, returning Tue, Mar 10, priced at $498 found 5 days ago
British Airways
Thu, Feb 12 - Sat, Feb 21
DUB
Dublin
SEA
Seattle
$498 Roundtrip, found 3 days ago
$498
Roundtrip
found 3 days ago
Select British Airways flight, departing Thu, Feb 12 from Dublin to Seattle, returning Sat, Feb 21, priced at $498 found 3 days ago
Scandinavian Airlines
Thu, May 21 - Fri, Jun 12
DUB
Dublin
SEA
Seattle
$511 Roundtrip, found 2 days ago
$511
Roundtrip
found 2 days ago
Select Scandinavian Airlines flight, departing Thu, May 21 from Dublin to Seattle, returning Fri, Jun 12, priced at $511 found 2 days ago
Aer Lingus
Fri, Nov 14 - Fri, Dec 5
DUB
Dublin
SEA
Seattle
$518 Roundtrip, found 4 days ago
$518
Roundtrip
found 4 days ago
Select Aer Lingus flight, departing Fri, Nov 14 from Dublin to Seattle, returning Fri, Dec 5, priced at $518 found 4 days ago
Iberia
Fri, Nov 14 - Fri, Nov 28
DUB
Dublin
SEA
Seattle
$535 Roundtrip, just found
$535
Roundtrip
just found
Select Iberia flight, departing Fri, Nov 14 from Dublin to Seattle, returning Fri, Nov 28, priced at $535 just found
Lufthansa
Thu, Feb 12 - Fri, Feb 20
DUB
Dublin
SEA
Seattle
$739 Roundtrip, found 4 days ago
$739
Roundtrip
found 4 days ago
Select Lufthansa flight, departing Thu, Feb 12 from Dublin to Seattle, returning Fri, Feb 20, priced at $739 found 4 days ago

Find the cheapest month to fly from Dublin (DUB) to Seattle (SEA)

April is typically the cheapest month to fly

From $379 - $914 per traveler.

Alternative airports near Seattle

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

Select flight to Seattle - Tacoma Intl. SEA. Cheapest option available. Average driving time to city center is 20 minutes. Flights from $787
SEA
Seattle - Tacoma Intl.
Cheapest
Average driving time to city center20 min
Flights from $787

Frequently asked questions

How much does a flight from Dublin Airport (DUB) to Seattle - Tacoma Intl. Airport (SEA) cost?
Snag a cheap one-way flight from $400 or cheap return flight from $495 from Dublin Airport (DUB) to Seattle - Tacoma Intl. Airport (SEA) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight offers on this route.
What is the cheapest month to fly from Dublin Airport (DUB) to Seattle - Tacoma Intl. Airport (SEA)?
January is the most affordable month to fly from DUB to SEA. Planning your trip for the off-season is often the key to finding better deals on flights.
What is the cheapest airline that flies from Dublin Airport (DUB) to Seattle - Tacoma Intl. Airport (SEA)?
Expedia's filter tool lets you easily compare different airlines, travel time and fares all in one place. Select your preferences, then sort by "Price (lowest to highest)" to find out which carrier offers the cheapest DUB to SEA flight.
How many flights per day from Dublin Airport (DUB) to Seattle - Tacoma Intl. Airport (SEA)?
Direct flights from Dublin Airport (DUB) to Seattle - Tacoma Intl. Airport (SEA) aren't available daily, so you'll have to take a flight with a layover. Explore your options with our filter tool. Enter your dates and select either "1 Stop" or "2+ Stops."
What day of the week has the most flights from DUB to SEA?
Usually you'll have the most choice when it comes to flights on a Friday. Tuesdays tend to be the quietest.* However, this can vary depending on the season, airline 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 Dublin Airport (DUB) to Seattle - Tacoma Intl. Airport (SEA)?
To touch down at Seattle - Tacoma Intl. Airport (SEA) on time, opt for a flight that leaves Dublin Airport (DUB) before 3 PM. The likelihood of cancellations is 22% higher, on average, for departures after this hour.**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 Dublin Airport (DUB) to Seattle - Tacoma Intl. Airport (SEA) last-minute?
Holding off until right before your break to book a ticket from DUB to SEA generally means paying more. While you might find some last-minute deals, there's no guarantee. Keep your travel plans flexible for a better chance of landing a bargain.
Is it cheaper to book a DUB to SEA flight and hotel package?
You'll typically save money by booking a DUB to SEA flight and hotel package compared to booking separately. In fact, travelers could save hundreds of dollars by bundling with Expedia. And it's easy to manage it all in one convenient place. After choosing your preferred flights and accommodations, consider adding extras like tours, car rentals and activities.
Can I cancel or change the date of my flight from Dublin Airport (DUB) to Seattle - Tacoma Intl. Airport (SEA)?
In most cases, you can cancel or reschedule your DUB to SEA flight. However, additional fees may apply, especially if you booked over 24 hours ago. Double-check your itinerary for the airline's rules and fees on flight changes, or if you need more information, head to our Customer Service portal.

Travel information

Origin airport
Dublin
Destination airport
Seattle - Tacoma Intl.
Airlines serving
Aer Lingus, Air Canada, Air France, American Airlines, British Airways, Brussels Airlines, Delta, Finnair, Iberia, Icelandair, JetBlue Airways, KLM, Lufthansa, Scandinavian Airlines, Swiss International Air Lines, United, WestJet
Roundtrip price
$494
Distance
4526 mi
Average flight time
9 hours 50 mins

Book with confidence

Dublin to Seattle Flights

The cheapest times to fly from Dublin to Seattle

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

 

The best time to book a flight from Dublin to Seattle

Sunday is one of the best days to book for cheap flights from Dublin to Seattle: 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 Dublin to Seattle

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 Dublin to Seattle in 2025. You can also book with separate airlines for your outbound and return journeys, from $400 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 Dublin to Seattle 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 Dublin to Seattle 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.

 

Dublin to Seattle Flights

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*Available to One Key members.