Cheap flights from Seattle to Belfast from $408
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to Belfast departing on 6/20. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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How to get the cheapest flight ticket from Seattle to Belfast
Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip
What is the cheapest day to depart on your flight to Belfast?
The cheapest day to depart from Seattle to Belfast is on a Tuesday when prices can be found for as low as $724. When flying out on a Wednesday, the most expensive travel day of the week, you can expect to see flight prices from Seattle to Belfast for around $1,208.
What is the cheapest time of day to depart on your flight to Belfast?
Our data shows that the cheapest Seattle to Belfast flights are usually those with departure times at noon. Our users have found flights to Belfast at noon for as low as $794. Try not to purchase tickets in the afternoon because they tend to be around $1,000. Of course, these prices can vary depending on the time of year and what airport you fly to.
Cheap Seattle to Belfast flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Seattle to Belfast
How far is Seattle/Tacoma Intl to Belfast by plane?
Belfast is 4463.0 mi away from Seattle/Tacoma Intl. In terms of flight time, this usually takes a little over 13h 40m.
When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to Belfast?
Prices for flights from Seattle/Tacoma Intl Airport to Belfast are refreshed on a daily basis.
How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to Belfast?
As of April 2025, there is 1 operator available to choose from for flights from Seattle/Tacoma Intl Airport to Belfast.
How old do you have to be to fly from Seattle/Tacoma Intl Airport to Belfast?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Seattle/Tacoma Intl Airport to Belfast.
What documentation or ID do you need to fly to Belfast?
The travel and health documents required for your trip to Belfast can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Belfast. We always recommend checking with your airline or a trusted third party such as IATA to get advice.
Best airlines flying from Seattle to Belfast
Compare and see reviews for airlines that fly from Seattle to Belfast with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $544 | Free Cancellation | Rating 6.6 6,829 reviews |
Why use momondo?
Why should I use momondo to find a flight deal from Seattle to Belfast?
momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Seattle to Belfast. Millions of users trust and use momondo every year so you are in good hands.
Can I find flights from Seattle to Belfast with flexible booking policies on momondo?
Yes. momondo enables you to select and highlight flights to Belfast from Seattle with this policy.
How can momondo help me find flights from Seattle to Belfast?
momondo provides multiple filters to help you find the best flight to Belfast from Seattle. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.
I’m not ready to book a flight from Seattle to Belfast right now. Can momondo alert me if prices change?
Yes. momondo can track prices for Seattle to Belfast flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.