Aer LingusEI100% on time
Flights EI135 15:40 daily
live
Direct flights from Shannon (SNN) to Boston (BOS): 7 nonstop departures observed each week across 1 airline. 100% of the last 6 operated flights arrived within 15 minutes of schedule. The median arrival is 7 minutes early. No cancellations were recorded across the 6 tracked flights. The nonstop covers 4,646 km, an estimated 6 hours 27 minutes in the air. Measured by Pro Flight Search from live flight boards at Shannon and Boston. Updated 21 September 2026 at 20:00 UTC.
SNN
Shannon
tracking
BOS
Boston
heavy · +43
4,646 km · ~6h 27m est.
Runs reliable · 1 airline · 7x weekly · nonstop
100% on time
of the last 6 operated SNN → BOS flights arrived within 15 minutes
Median arrival delay is −7 min. 0 of 6 tracked legs cancelled in the sample. Will a delayed flight be cancelled? →
Median arrival−7 minacross the last 6 operated legs
Flight time~6h 27mestimated from route distance
Weekly departures7x1 direct airline on the leg
The week
scheduled departures · origin local time06121824
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Aer Lingus
Each mark is a scheduled departure at its origin-local time, observed operating in the last 7 days. Today is highlighted.
Who flies it
observed on the boards · 7 daysHistory
operated legs · board outcomesActual board outcomes rather than schedules, paired departure and arrival per flight and day.
Full board history, day by day →
Airports right now
live boardsnext sweep in 120s
How the Shannon to Boston route actually runs
Pro Flight Search records official board updates for nonstop SNN to BOS flights through the day: schedules, estimates, gate pushes and actual departures. The verdict above comes from operated flights, so it reflects what this route does rather than what the timetable promises.
Planning around a delay? Live airport delays · Weather delay risk map · Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
Cite this data
Journalists, bloggers, and researchers may cite this page with attribution and a link to Pro Flight Search.
Suggested citation
Pro Flight Search — Shannon (SNN) to Boston (BOS) route reliability, measured from operated flights on official airport boards.
Canonical URL
How we measure this →
https://proflightsearch.com/search-flights/SNN-BOS
SNN to BOS questions
Is SNN–BOS running on time right now?
Significant delay risk. The arrival side at BOS is the weaker end, route health score 42/100. The airports section above carries the live status and delay window at both ends.
How long is the flight from SNN to BOS?
Great-circle distance is 4,646 km. With typical jet cruise speed plus taxi, climb and descent, expect roughly 358–428 min gate-to-gate on this route.
How often does SNN–BOS fly?
Aer Lingus runs the route with about 7 flights a week (daily). Since one carrier owns the route, a single disruption tends to ripple through the day.
What does the route health score measure?
A blend of departure-side delay at SNN and arrival-side delay at BOS, computed from rolling delay windows (refreshed every 40 minutes) with a daily-rollup fallback. Current MVFR, IFR, or LIFR endpoint weather caps the score when flight rules can limit throughput. Higher is healthier: 100 means operations are clean at both ends.
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