SNN→JFK

Aer Lingus flew 73% of the 838 flights between SNN and JFK in the DOT's count, with Delta Air Lines on 226. Loads averaged 148 passengers a flight, which on this route means wide-body aircraft nearly full.

The DOT's international report puts 124 flights on the pair in July 2025, the busiest month of the window, and 0 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.

John F. Kennedy International is scored on this site from the DOT's domestic data: 74.3% of its 102,713 domestic departures arrived on time over the last twelve months, with delayed flights running a little over an hour late, and 3.98% 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 JFK 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.

John F. Kennedy International (JFK) delay statistics, hour by hour and month by month

Every flight that departs Shannon falls under Regulation (EC) 261/2004, whichever airline flies it and wherever it lands. If it arrives at John F. Kennedy 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 JFK is covered only when the carrier is EU based. The sector is about 3,073 miles, 4,944 km, which puts it in the top distance band.

Delayed three hours or more? Check a claim with Compensair →

There is no grade to give SNN to JFK 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 choice of two carriers, a departure airport that EUROCONTROL does not score and an arrival airport that runs 74% on time domestically. Leave two hours for any onward connection at JFK; immigration comes before the connecting flight.

• Shannon (SNN): every US route
• John F. Kennedy International (JFK) delay statistics
• SNN to BOS, Boston (BOS)753 flights
• SNN to EWR, Newark (EWR)408 flights
• SNN to ORD, Chicago (ORD)251 flights
• LHR to JFK, from London14,572 flights
• CDG to JFK, from Paris7,055 flights
• FCO to JFK, from Rome3,990 flights
• FRA to JFK, from Frankfurt3,168 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.