Flights from Seattle / Tacoma International Airport to Northern Ireland

Flight deals from Seattle / Tacoma International Airport to Northern Ireland

Looking for cheap tickets from Seattle / Tacoma International Airport to Northern Ireland, or a last-minute trip? Find the lowest prices on one-way and return tickets right here.

Belfast.$322 per passenger.Departing Sun, 4 Oct.One-way flight with British Airways.Outbound indirect flight with British Airways, departs from Seattle / Tacoma International on Sun, 4 Oct, arriving in Belfast City.Price includes taxes and charges.From $322, select.

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Flying from Seattle / Tacoma International Airport to Northern Ireland

Arm yourself with these facts on the fly.

Cheapest flight found	$322
Cheapest month to fly	October

How to find cheap flights from Seattle / Tacoma International Airport to Northern Ireland

We've compared the best online travel agents and flight providers on the internet to find the cheapest plane tickets from Seattle / Tacoma International Airport to Northern Ireland. Other savvy travellers recently found return flights from $987 and one-way tickets from $322. Ready to join them? Here are a few tips to help you do it the smart way.

Fly in September

The cheapest time to fly from Seattle / Tacoma International Airport to Northern Ireland is currently September.

Flex your dates for the best rates

If you’re flexible on your departure dates, you can use Skyscanner's whole month tool to find the cheapest day of the year to fly from Seattle / Tacoma International Airport to anywhere you choose in Northern Ireland.

Watch as fares rise and fall

With Price Alerts, we'll let you know when flight prices from Seattle / Tacoma International Airport to your chosen airport in Northern Ireland go up or down so you can book when the time is just right.

Relax – these are fee-free flight tickets

With us, there are no added fees – the Northern Ireland Airport to Northern Ireland flight price you see when you search with us is what you pay to the provider.

Frequently asked questions

Are there any direct flights from Seattle / Tacoma International Airport to Northern Ireland?

There are currently no direct flights from Seattle / Tacoma International Airport to Northern Ireland, but we've found some other routes to United Kingdom – check them out now.

What is the average price of a flight from Seattle / Tacoma International Airport to Northern Ireland?

We looked at all of the upcoming return flights from Seattle / Tacoma International Airport to Northern Ireland we could find over the next 12 months. It looks like $987 is the best price. This is good, compared to the average Northern Ireland ticket price of $1,466.

What is the cheapest month to fly from Seattle / Tacoma International Airport to Northern Ireland?

The cheapest month to fly from Seattle / Tacoma International Airport to Belfast City Airport is currently September.
The cheapest month to fly from Seattle / Tacoma International Airport to Derry Airport is usually March.

Which upcoming date is cheapest to fly from Seattle / Tacoma International Airport to Northern Ireland on?

After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from Seattle / Tacoma International Airport to Northern Ireland on Tuesday, 22 September 2026.

If I'm flying from Seattle / Tacoma International Airport, where in Northern Ireland is cheapest to fly into?

If you're flying from Seattle / Tacoma International, the cheapest city in Northern Ireland to fly into is Belfast. The cheapest airport serving Belfast at the moment is Belfast City.