Question 1

How long is the flight from Northern Ireland to Seattle?

Accepted Answer

For as low as £556, British Airways can have you in Seattle from Northern Ireland in 12h 55m. Airlines will cover a distance of 4472 mi.

Question 2

What is the cheapest month to book a flight from Northern Ireland to Seattle?

Accepted Answer

Currently, January is the cheapest month in which you can book a flight from Northern Ireland to Seattle (average of £622). Flying from Northern Ireland to Seattle in July is currently the most expensive (average of £946). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Question 3

E

Accepted Answer

In terms of precipitation, rainfall in Seattle ranges from 18.0 - 168.0 inches per month. November is typically the wettest month, when rainfall can reach 168.0 mm. July is typically the driest time to visit Seattle when rainfall is around 18.0 mm.

Question 4

E

Accepted Answer

If weather is an important factor for your trip to Seattle, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 19.0 C. Travellers hoping to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 5.0 C).

Question 5

What is the cheapest month to fly from Northern Ireland to Seattle?

Accepted Answer

May is one of the best times of the year to fly to Seattle from Northern Ireland. Prices for May average £614 per person but you can even find prices for as low as £435. The most expensive prices can be found in the month of November. Opting for a May flight can save you 31% on your journey compared to booking in November

Question 6

What is the cheapest time of day to fly from NIR to SEA?

Accepted Answer

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Northern Ireland to Seattle as you normally would.

Question 7

What airport do you fly into for flights to Seattle from Northern Ireland?

Accepted Answer

Most people fly into Seattle/Tacoma Intl (SEA) if they book a flight to Seattle from Northern Ireland. Seattle/Tacoma Intl is conveniently located just 11.4 mi from Seattle’s city center.

Question 8

Can I find deals for flights from Northern Ireland to Seattle that include hotel bookings?

Accepted Answer

Yes. In addition to deals on Northern Ireland to Seattle flights, Cheapflights offers holiday packages that include both flights and hotel.

Question 9

How can I find direct flights from Northern Ireland to Seattle?

Accepted Answer

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Northern Ireland to Seattle.

Question 10

Can I find deals for business class flights from Northern Ireland to Seattle?

Accepted Answer

Yes. Cheapflights offers flight deals from Northern Ireland to Seattle by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

Question 11

How does Cheapflights help users find flights from Northern Ireland to Seattle?

Accepted Answer

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Northern Ireland to Seattle. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

Question 12

Why should you use Cheapflights to find cheap flight tickets from Northern Ireland to Seattle?

Accepted Answer

Cheapflights helps you find that perfect flight to Seattle from Northern Ireland by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Question 13

Can Cheapflights find flights from Northern Ireland to Seattle with no change fees?

Accepted Answer

Yes! Cheapflights helps users easily find flights from Northern Ireland to Seattle with no change fees.

Question 14

Can Cheapflights notify me if prices for flights from Northern Ireland to Seattle become cheaper?

Accepted Answer

Yes! Start tracking prices for Northern Ireland to Seattle flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

Round-trip from	£556
One-way from	£420
Popular in	November
Cheapest in	May
Average price	£771

Airline	Cheapest	Average	Flexibility	On-time
British Airways	Cheapest£438	Average£536	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
American Airlines	Cheapest£559	Average£559	FlexibilityNo cancel fee	On-time71%	Search American Airlines flights

Cheap flights from Northern Ireland to Seattle from £420

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 28/8. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Northern Ireland to Seattle

Keep the following information in mind while searching for Northern Ireland to Seattle flight deals. Data was last updated 22 August 2025.

Round-trip from

One-way from

Popular in

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Average price

Find flight deals from Northern Ireland to Seattle

Cheapest flights from Northern Ireland to SeattleExplore the most affordable flight options available from Northern Ireland to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 22 August 2025.

Explore the most affordable flight options available from Northern Ireland to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 22 August 2025.

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Best time to book a flight from Northern Ireland to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from Northern Ireland with our price prediction graph.

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Everything you need to know about your flight from Northern Ireland to Seattle

Related info for your journey

Find useful and relevant information for your journey from Northern Ireland to Seattle. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

What airport do you fly into for flights to Seattle from Northern Ireland?

How long is the flight from Northern Ireland to Seattle?

Can I find deals for flights from Northern Ireland to Seattle that include hotel bookings?

How can I find direct flights from Northern Ireland to Seattle?

Can I find deals for business class flights from Northern Ireland to Seattle?

What is the cheapest month to book a flight from Northern Ireland to Seattle?

Travelling to a place near Seattle?

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Alternative routes for Northern Ireland to Seattle

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Top 2 airlines flying from Northern Ireland to Seattle

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How does Cheapflights help users find flights from Northern Ireland to Seattle?

Why should you use Cheapflights to find cheap flight tickets from Northern Ireland to Seattle?

Can Cheapflights find flights from Northern Ireland to Seattle with no change fees?

Can Cheapflights notify me if prices for flights from Northern Ireland to Seattle become cheaper?

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Cheapest flights from Northern Ireland to Seattle
Explore the most affordable flight options available from Northern Ireland to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 22 August 2025.