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prices we've seen · United States fares · USD

Flights from Seattle (SEA) to Belfast (BHD)

  • One way from $674
  • No nonstop seen
  • Fastest 32h 25m
  • 1 airline

The cheapest one-way fare from Seattle to Belfast we have seen is $674 USD, departing Nov 6 (seen Oct 26): Alaska Airlines AS 100, 1 stop, 32h 25m.

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Cheapest by month

Checked Oct 26

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  1. Nov 2026$674

Cheapest days to fly one way

Each day's cheapest fare we've seen, nonstop and with stops. Cheapest first.

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  1. FriNov 6

    18:45

    32h 25m1 stop

    11:10+2

    Cheapest$674 USD

    Alaska Airlines AS 100 · seen Oct 26

    Go to seller — $674

Compare other routes

Compared with Seattle → Belfast: $674 one way (Nov 6).

Other places from Seattle

Every route from Seattle →

To Belfast from other cities

Every route to Belfast →

Airlines seen on this route

  • Alaska Airlines

Marketing carriers; the operating airline is shown by the seller.

Seattle to Belfast in numbers

  • The one departure date seen has no nonstop fare — every fare has at least one stop; carriers seen: Alaska Airlines.
  • SEA serves Seattle, United States; BHD serves Belfast, United Kingdom.
  • Belfast runs 8 hours ahead of Seattle.

Questions

What is the cheapest fare from Seattle to Belfast?

The cheapest one-way fare from Seattle to Belfast we have seen is $674 USD, departing Nov 6 (seen Oct 26): Alaska Airlines AS 100, 1 stop, 32h 25m.

Is there a nonstop flight from Seattle to Belfast?

The one departure date seen has no nonstop fare — every fare has at least one stop; carriers seen: Alaska Airlines.

How old is this price?

It is the cheapest fare we've seen for that date; the date beside it is the day it was seen, or our last check. We look again at least once a day for the routes people search, and stop showing a route's prices two days after our last look. The seller's page shows the price right now.

How does a2bflight rank results?

By price and duration only; commission never enters the order. Cheapest means cheapest among the fares we've seen for this route. A click that books may earn a2bflight a commission from the seller; the price you see is the seller's own. See how we rank and what we keep.