Cheap Flights from Seattle to Castletown
No deal from Seattle to Castletown has cleared our price bar yet. What we have seen on the route is below.
Across 4 months of observations from Seattle to Castletown, the lowest round-trip fare we recorded was $786, in September. The typical fare was $1072. September was the cheapest month we saw and July the dearest.
The most recent price we saw on this route was $970 on Aer Lingus, seen Oct 28. It is an unverified observation and may have changed.
See every deal <a href="/from/seattle">from Seattle</a>, <a href="/to/castletown">to Castletown</a>, or the return direction <a href="/from/castletown/to/seattle">Castletown to Seattle</a>.
Latest price we saw: Seattle to Castletown
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 |
|---|---|---|---|---|---|---|
| Seattle (SEA) to Castletown (IOM) | $970 | 10.7¢ | Apr 5 – Apr 13 | Aer Lingus | Oct 28 | Check price |
Price history: Seattle to Castletown
What we observed by month, from our signals database. Unverified observations, not bookable prices.
| Month | Low | Typical | Sightings |
|---|---|---|---|
| Oct 2026 | $966 | $1085 | 29 |
| Sep 2026 | $786 | $881 | 35 |
| Aug 2026 | $1022 | $1146 | 47 |
| Jul 2026 | $1175 | $1175 | 1 |
Frequently asked questions
How many flight deals from Seattle to Castletown are on Sparkflights right now?
There are 0 verified deals from Seattle to Castletown on the board right now. The list refreshes hourly.
What is the lowest price ever seen from Seattle to Castletown?
The lowest fare we've recorded from Seattle to Castletown is $786, based on 112 price observations over 4 months.
How much does a flight from Seattle to Castletown cost?
The typical round-trip fare we observed from Seattle to Castletown is $1072, against a recorded low of $786. These are observations, not quotes.
When is the cheapest month to fly Seattle to Castletown?
September was the cheapest month we observed from Seattle to Castletown and July the dearest, over 4 months of data.
What is the current price from Seattle to Castletown?
The most recent fare our sweep saw from Seattle to Castletown is $970, on Oct 28. It is an unverified observation rather than a verified deal, so check it before booking.