Thanks all. Looking back this was happening quickly so I can see where I made it confusing. While at one point they did book a one way DL ticket I cautioned against taking that path since I was concerned Norwegian wouldn’t honor the return segment. Flash forward a few hours and I got a text saying they were flying AF in J and we’re planning to cancel their Norwegian ticket. They landed a few hours ago so still unclear on the whole picture but assuming that AF J is a round trip, which they booked because Norwegian cancelled their original flight, do they have an EU261 claim? They’re planning to get the original Norwegian ticket refunded in addition.

I’ve advised them to get with Chase as soon as possible to discuss options, what’s covered etc. My hope is somewhere between 261 and Chase they chip away at the cost of what I’m sure was a costly last minute J fare. Thanks.