Transatlantic route · frequency, carriers and airport records
SNN→BOS
Shannon to Boston
- Flights
- 753 both ways
- Carriers
- 1
- Distance
- 2,887 mi
- Period
- July 2025 to June 2026
No public record scores Shannon to Boston Logan International flight by flight. The US Department of Transportation's on-time database covers domestic flights only, and in Europe only the United Kingdom publishes punctuality by route, so what follows is built from the three measurements that do exist. The DOT's international report counts 753 flights between the two airports in the twelve months to June 2026, about one departure a day in each direction, flown by Aer Lingus. EUROCONTROL publishes no punctuality series for Shannon. At the other end, 74.6% of BOS's domestic departures arrived on time in the DOT data, which says something about how the airport itself runs, not about this route.
EUROCONTROL does not publish a punctuality series for Shannon, so the departure end of this route cannot be ranked against other European gateways here.
Key figures
Flights
753
Both directions, July 2025 to June 2026 (DOT)
Carriers
1
Aer Lingus
SNN departures on time
—
Not published for this airport
BOS domestic on time
74.6%
US DOT, last twelve months of domestic departures
Without a route-level record, the useful question is what the two airports do to a schedule. In the DOT data, a delayed domestic departure from BOS ran a little over an hour late on average over the last twelve months, and 3.05% of its scheduled flights were cancelled.
Carrier by carrier
Who flies SNN to BOS
Aer Lingus is the only carrier the DOT report shows on SNN to BOS, with 753 flights and an average of 143 passengers aboard each. A single-carrier route gives a delayed passenger no same-day alternative on the same ticket, which is worth knowing before booking a tight onward connection.
| Airline | Flights | Share | Per month | Passengers / flight |
|---|---|---|---|---|
| Aer Lingus | 753 | 100% | 63 | 143 |
DOT international report, July 2025 to June 2026; flights in both directions together. No delay figures exist for this pair in any public source.
Across the year
How often SNN to BOS flies through the year
The DOT's international report puts 86 flights on the pair in June 2026, the busiest month of the window, and 54 in February 2026, the thinnest. A summer-to-winter swing of that size means the winter schedule is a different operation: fewer frequencies, so a cancellation leaves a longer wait for the next seat.
Flights per month, both directions
- July 202562
- August 202562
- September 202560
- October 202562
- November 202560
- December 202558
- January 202658
- February 202654
- March 202660
- April 202660
- May 202671
- June 202686
The DOT's international report counts flights in both directions together: 753 between SNN and BOS from July 2025 to June 2026, about one departure a day in each direction, carrying 107,565 passengers. That makes it the 2nd busiest of 4 US routes from Shannon and the 12th busiest of 21 European routes into BOS.
The arrival airport
Landing at Boston Logan International
Boston Logan International is scored on this site from the DOT's domestic data: 74.6% of its 144,174 domestic departures arrived on time over the last twelve months, with delayed flights running a little over an hour late, and 3.05% were cancelled. Those are domestic flights, not this route, but an arriving transatlantic flight shares the same runways, the same weather and the same ground delay programmes, so a bad day at BOS reaches a flight from SNN just as surely. The airport's own page has the hour-by-hour and month-by-month detail, and its live FAA status appears above when the FAA has something to say.
Domestic on time
74.6%
Arrivals under 15 minutes late (DOT)
Avg delay
73 min
Delayed domestic flights only
Cancelled
3.05%
Domestic departures
144,174
Last twelve months
Boston Logan International (BOS) delay statistics, hour by hour and month by month
Your rights
EC 261/2004 on SNN to BOS
Every flight that departs Shannon falls under Regulation (EC) 261/2004, whichever airline flies it and wherever it lands. If it arrives at Boston Logan International three hours or more late, or is cancelled with under 14 days' notice, and the cause was within the airline's control, each passenger is owed €600 (€300 if the airline got you there under four hours late), on top of rebooking and care. Weather, air traffic control restrictions and strikes outside the airline are the usual exemptions. The return flight from BOS is covered only when the carrier is EU based. The sector is about 2,887 miles, 4,645 km, which puts it in the top distance band.
Delayed three hours or more? Check a claim with Compensair →
What to do with this
Booking SNN to BOS
There is no grade to give SNN to BOS without a route record, and this site does not invent one. What the three sources support: about one departure a day in each direction, a single carrier, a departure airport that EUROCONTROL does not score and an arrival airport that runs 75% on time domestically. Leave two hours for any onward connection at BOS; immigration comes before the connecting flight.
Common questions
SNN to BOS questions
How often are SNN to BOS flights delayed?
No public dataset records delays for this route flight by flight: the US on-time database is domestic only and only the UK publishes route-level punctuality in Europe. The nearest measurements are the departure airport's EUROCONTROL punctuality (not published for this airport) and BOS's domestic record in the DOT data (74.6% on time).
Which airlines fly SNN to BOS?
Aer Lingus. Aer Lingus accounted for 100% of the 753 flights the DOT counted on the pair.
Can I claim compensation for a delayed SNN to BOS flight?
Yes, if the flight arrived three hours or more late or was cancelled at short notice for a reason within the airline's control: departures from Shannon are covered by EC 261/2004 whichever airline operates them. The fixed amount for a sector of this length is €600 a passenger, €300 if the airline got you there under four hours late. The return from BOS is covered only on an EU carrier.
How many flights a day are there from SNN to BOS?
About one departure a day in each direction: the DOT counted 753 flights in both directions over twelve months, peaking at 86 in June 2026 and falling to 54 in February 2026.
Related
Where to go next
- Shannon (SNN): every US route
- Boston Logan International (BOS) delay statistics
- SNN to JFK, New York (JFK)838 flights
- SNN to EWR, Newark (EWR)408 flights
- SNN to ORD, Chicago (ORD)251 flights
- LHR to BOS, from London5,370 flights
- CDG to BOS, from Paris2,530 flights
- DUB to BOS, from Dublin2,476 flights
- AMS to BOS, from Amsterdam2,230 flights
- Every Europe-to-US route and airport
Ireland publishes no route-level punctuality, so this page cannot grade the route. The UK pages in this section can, because the CAA does.
Sources: US DOT Bureau of Transportation Statistics, International Report (flights and passengers by carrier and airport pair), July 2025 to June 2026. Rebuilt 22 October 2026; the EUROCONTROL figures refresh with each weekly build, the others when their publisher releases a month. How these sources differ.