KEF→JFK

Icelandair flew 76% of the 1,713 flights between KEF and JFK in the DOT's count, with Delta Air Lines on 413. Loads averaged 134 passengers a flight, which on this route means wide-body aircraft nearly full.

The DOT's international report puts 190 flights on the pair in May 2026, the busiest month of the window, and 81 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.

EUROCONTROL's figures for Keflavík as a whole, every airline and every destination: 69.0% of departures and 77.8% of arrivals within 15 minutes of schedule from 1 January to 21 October 2026, with 88.5% of scheduled flights operated. The last seven days ran at 70.5% for departures, 2 points better than the year so far. Air traffic flow management delay attributed to the airport averaged 0.0 minutes per arriving flight this year, 0.0 over the last week.

Every US route from Keflavík, and its full punctuality record

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 KEF 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 Keflavík 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 2,587 miles, 4,162 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 KEF to JFK without a route record, and this site does not invent one. What the three sources support: about two departures a day in each direction, a choice of two carriers, a departure airport that gets 69% of its departures away on time 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.

• Keflavík (KEF): every US route
• John F. Kennedy International (JFK) delay statistics
• KEF to SEA, Seattle (SEA)1,413 flights
• KEF to BOS, Boston (BOS)1,377 flights
• KEF to ORD, Chicago (ORD)1,276 flights
• KEF to IAD, Washington (IAD)1,015 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

Iceland publishes no route-level punctuality, so this page cannot grade the route. The UK pages in this section can, because the CAA does.