Cheap Flights from Belfast to Seattle
No deal from Belfast to Seattle has cleared our price bar yet. What we have seen on the route is below.
Across 4 months of observations from Belfast to Seattle, the lowest round-trip fare we recorded was $769, in August. The typical fare was $886. August was the cheapest month we saw and July the dearest.
The most recent price we saw on this route was $943 on Delta and KLM, seen Oct 15. It is an unverified observation and may have changed.
See every deal <a href="/from/belfast">from Belfast</a>, <a href="/to/seattle">to Seattle</a>, or the return direction <a href="/from/seattle/to/belfast">Seattle to Belfast</a>.
Latest price we saw: Belfast to Seattle
The most recent round-trip fare our sweep found on this route. It is not verified and may have changed since the date shown.
| From | Price | Per mile | Travel dates | Airline | Seen | Check price |
|---|---|---|---|---|---|---|
| Belfast (BHD) to Seattle (SEA) | $943 | 10.5¢ | Nov 7 – Nov 13 | Delta and KLM | Oct 15 | Check price |
Price history: Belfast to Seattle
What we observed by month, from our signals database. Unverified observations, not bookable prices.
| Month | Low | Typical | Sightings |
|---|---|---|---|
| Oct 2026 | $851 | $914 | 4 |
| Sep 2026 | $778 | $778 | 1 |
| Aug 2026 | $769 | $925 | 10 |
| Jul 2026 | $926 | $926 | 1 |
Frequently asked questions
How many flight deals from Belfast to Seattle are on Sparkflights right now?
There are 0 verified deals from Belfast to Seattle on the board right now. The list refreshes hourly.
What is the lowest price ever seen from Belfast to Seattle?
The lowest fare we've recorded from Belfast to Seattle is $769, based on 16 price observations over 4 months.
How much does a flight from Belfast to Seattle cost?
The typical round-trip fare we observed from Belfast to Seattle is $886, against a recorded low of $769. These are observations, not quotes.
When is the cheapest month to fly Belfast to Seattle?
August was the cheapest month we observed from Belfast to Seattle and July the dearest, over 4 months of data.
What is the current price from Belfast to Seattle?
The most recent fare our sweep saw from Belfast to Seattle is $943, on Oct 15. It is an unverified observation rather than a verified deal, so check it before booking.