Cheap flights from Belfast to Seattle from £595
This is the cheapest return flight price found by a momondo user in the last 72 hours by searching for a flight from Belfast to Seattle departing on 8/5. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
Discover deals from 900+ travel sites with momondo.
Big names, great deals
Big names, great deals
Search 100s of travel sites to compare prices.Filter for what you want
Filter for what you want
Free Wi-Fi? Stopover? Instantly customise your results.Trusted and free
Trusted and free
We’re completely free to use - no hidden charges or fees.Price Alerts
Price Alerts
Not ready to book? to track prices.Find the cheapest flights from Belfast to Seattle
Cheap return flights
Delta flights from Belfast to Seattle
Our best Delta deals on Belfast to Seattle flight tickets
British Airways flights from Belfast to Seattle
Our best British Airways deals on Belfast to Seattle flight tickets
See travel insights to Seattle from
How to get the cheapest flight ticket from Belfast to Seattle
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
Cheap Belfast to Seattle flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Belfast to Seattle
How far is Belfast to Seattle/Tacoma Intl by plane?
Seattle/Tacoma Intl is 4463.0 mi away from Belfast. By plane, this route typically takes 12h 45m.
When did momondo last update prices for flights from Belfast to Seattle/Tacoma Intl Airport?
Prices for flights from Belfast to Seattle/Tacoma Intl Airport are refreshed on a daily basis.
How many operators does momondo search for flights from Belfast to Seattle/Tacoma Intl Airport?
As of March 2025, there is 1 operator available to choose from for flights from Belfast to Seattle/Tacoma Intl Airport.
How old do you have to be to fly from Belfast to Seattle/Tacoma Intl Airport?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Belfast to Seattle/Tacoma Intl Airport.
What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?
The travel and health documents required for your trip to Seattle/Tacoma Intl Airport 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 Seattle/Tacoma Intl Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.
Best airlines flying from Belfast to Seattle
Compare and see reviews for airlines that fly from Belfast to Seattle with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom £458 | Free Cancellation | Rating 6.6 6,712 reviews |
Travelling to a place near Seattle?
Book flights to Seattle if you plan to visit one of these locationsWhy use momondo?
Why should I use momondo to find a flight deal from Belfast to Seattle?
momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Belfast to Seattle. momondo saves you time and could save you money on your trip.
Can I find flights from Belfast to Seattle with flexible booking policies on momondo?
momondo does allow users to show only those flights to Seattle from Belfast which offer a flexible booking policy as well as other useful filters and features.
How can momondo help me find flights from Belfast to Seattle?
momondo provides multiple filters to help you find the best flight to Seattle from Belfast. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.
I’m not ready to book a flight from Belfast to Seattle right now. Can momondo alert me if prices change?
Yes momondo offers price alerts on flights to Seattle from Belfast. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.