$339+ Cheap flights from Seattle (SEA) to Northern Ireland
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 5/4. Fares are subject to change and may not be available on all flights or dates of travel.
Find cheap flights from Seattle to Northern Ireland with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Seattle to Northern Ireland
Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Northern Ireland (GBNIR). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated January 21, 2025.
Round-trip from | $698 (Trip.com) |
|---|---|
One-way from | $339 (Kiwi.com) |
Find flight deals from Seattle to Northern Ireland
Cheapest flights from Seattle to Northern IrelandExplore the most affordable flight options available from Seattle to Northern Ireland. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 21, 2025.
Explore the most affordable flight options available from Seattle to Northern Ireland. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 21, 2025.
This Trip.com deal was found by Cheapflights users on 1/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Finnair deal was found by Cheapflights users on 1/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This American Airlines deal was found by Cheapflights users on 1/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Delta deal was found by Cheapflights users on 1/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Cheapflightsfares deal was found by Cheapflights users on 1/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Booking.com deal was found by Cheapflights users on 1/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This American Airlines deal was found by Cheapflights users on 1/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Find flights from Seattle to Northern Ireland within your budget
Customize your flight search to find flights from Seattle to Northern Ireland that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated January 21, 2025.
Fly from
Fly to
Route
Depart
Return
Price
SeattleBelfast
SEA - BFS
SEABFS
Seattle/Tacoma Intl
Wed 3/5
2:35 pm-5:55 pm
2 stops19h 20m
Belfast Intl
Wed 3/12
6:30 am-6:00 pm
2 stops18h 30m
SeattleBelfast
SEA - BHD
SEABHD
Seattle/Tacoma Intl
Thu 2/20
6:50 pm-4:40 pm
1 stop13h 50m
Belfast City
Thu 2/27
6:35 am-4:55 pm
1 stop18h 20m
SeattleBelfast
SEA - BHD
SEABHD
Seattle/Tacoma Intl
Thu 2/20
1:33 pm-4:40 pm
2 stops19h 07m
Belfast City
Thu 2/27
11:05 am-4:55 pm
1 stop13h 50m
SeattleBelfast
SEA - BHD
SEABHD
Seattle/Tacoma Intl
Thu 3/6
7:10 am-4:50 pm
2 stops25h 40m
Belfast City
Thu 3/13
5:20 pm-12:40 pm
1 stop26h 20m
SeattleBelfast
SEA - BHD
SEABHD
Seattle/Tacoma Intl
Fri 5/2
8:20 pm-8:45 pm
1 stop16h 25m
Belfast City
Sun 5/11
11:00 am-6:20 pm
1 stop15h 20m
SeattleBelfast
SEA - BHD
SEABHD
Seattle/Tacoma Intl
Wed 5/14
6:45 pm-7:55 pm
2 stops17h 10m
Belfast City
Fri 5/16
8:05 pm-4:59 pm
2 stops28h 54m
SeattleBelfast
SEA - BHD
SEABHD
Seattle/Tacoma Intl
Wed 5/14
11:20 am-1:30 pm
2 stops18h 10m
Belfast City
Fri 5/16
4:20 pm-11:35 am
1 stop27h 15m
SeattleBelfast
SEA - BHD
SEABHD
Seattle/Tacoma Intl
Sun 5/4
6:00 am-8:20 pm
2 stops30h 20m
SeattleBelfast
SEA - BFS
SEABFS
Seattle/Tacoma Intl
Fri 3/7
3:15 pm-8:50 pm
3 stops45h 35m
SeattleBelfast
SEA - BHD
SEABHD
Seattle/Tacoma Intl
Sun 5/4
8:20 pm-8:45 pm
1 stop16h 25m
Best time to book a flight from Seattle to Northern Ireland
Have a flexible travel schedule? Discover the best time to fly to Northern Ireland from Seattle with our price prediction graph.
Travel insights for flights from Seattle to Northern Ireland
Get recent, data-driven insights about flights from Seattle to Northern Ireland including ideal travel times, pricing trends, and more.
What is the cheapest month to book a flight from Seattle to Northern Ireland?
Currently, February is the cheapest month in which you can book a flight from Seattle to Northern Ireland (average of $657). Flying from Seattle to Northern Ireland in June is currently the most expensive (average of $1,189). 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.
What is the cheapest time of day to fly from SEA to NIR?
Find hourly flight availability from Seattle to Northern Ireland. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated January 21, 2025.
When flying from Seattle to Northern Ireland, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.
Rainfall in Northern Ireland by month
Plan your trip to Northern Ireland by taking into account the average rainfall totals by month.
In terms of precipitation, rainfall in Northern Ireland ranges from 2.0 - 3.5 inches per month. October is typically the wettest month, when rainfall can reach 3.5 in. April is typically the driest time to visit Northern Ireland when rainfall is around 2.0 in.
Temperature in Northern Ireland by month
Plan your trip to Northern Ireland by taking into account the average temperature totals by month.
If weather is an important factor for your trip to Northern Ireland, 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 60.8 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 41.0 F).
Reviews of airlines servicing Northern Ireland
Get insights into the airlines that provide service to Northern Ireland. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Northern Ireland. Reviews last updated January 21, 2025.
Food
Crew
Boarding
Entertainment
Overall
Comfort
Reviews
This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Food
Crew
Boarding
Entertainment
Overall
Comfort
Reviews
This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Food
Crew
Boarding
Entertainment
Overall
Comfort
Reviews
This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Food
Crew
Boarding
Entertainment
Overall
Comfort
Reviews
This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Food
Crew
Boarding
Entertainment
Overall
Comfort
Reviews
This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Food
Crew
Boarding
Entertainment
Overall
Comfort
Reviews
This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Related info for your journey
Find useful and relevant information for your journey from Seattle to Northern Ireland. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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Alternative routes for Seattle to Northern Ireland
See prices for flight routes from nearby airports that may be better suited for you.
Top 2 airlines flying from Seattle to Northern Ireland
Discover the top 2 airlines that operate flights from Seattle to Northern Ireland. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated January 21, 2025.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$544 | Average$891 | FlexibilityNo cancel fee | On-time70% | |
| Cheapest$573 | Average$791 | FlexibilityNo cancel fee | On-time71% |