Delayed
I had a flight that was supposed to depart at ~6pm today. At 3:46, I received an email saying the flight was delayed 40 minutes.

Canceled.
About 40 minutes later, I overheard a co-worker mention that his flight was cancelled. We were on the same flight . No notice from Delta.

Reaction
I realize my flight is the last DL flight and I burst into action and called the diamond desk to try and get re-booked. Agent answers and I try to re-book from several airports within 100 miles, but I can't make any of the flights

I ask the cause of the cancellation. I'm told that it was due to air traffic. I challenged this and even the agent said he had never heard of a cancellation due to traffic, only delays. After 10 precious minutes on hold, the agent came back on and told me it was mx. So, I try to re-booking and all but the last flight to O'hare is Y0. The only connecting flight to ATL on AA is canceled.

Questions
Why didn't I get a notification or call? I'm 100% certain I could have made another flight at a close airport with another 15-20 minutes notice. I'm also pretty confident that those flights weren't oversold until my flight was canceled.

I'm mad I didn't get a call and that I was re-booked on the 3rd flight the next morning. Can't switch to anything earlier. I thought i had protection priority?

So, now that i'm not going anywhere, what should i complain about and what compensation should i ask for? Let me add, there were 7 remaining flights to DFW, CLT, ORD, EWR, and LGA. I should have had plenty of options.

Ask for a hotel voucher or reimbursement

Oh, I'm already going to do that. IMO, this deserves more. I should have been able to get out.

Also, this place is an 1.5 hr flight from ATL. I'm not saying they should fly another bird out, but they certainly could. Original equipment was a CR200. Flight was full.

How did you co worker get notified?

What happened to him?

You will get a hotel/meal package and 15k skymiles

Checked his app. Got rebooked on the same flight. He's a gold and didn't really care enough to try to figure out a way home tonight.

1. There is no cancellation compensation in the US. You are thinking of Europe.

2. As an MX cancellation, OP will be entitled to a hotel and meal vouchers.

3. DL may also make a customer service gesture of a few miles. But, that's not compensation.

Can't explain why you didn't get an email when your flight cancelled. It's all software based, not as though somebody at DL sits there tapping out individual emails. DL clearly had your email and had that associated with your flight and clearly sent out at least two emails: the delay and the cancellation. It's unlikely that you were deliberately left off the second email.

I know there is no compensation requirement in the us. I know the emails are automated. I'm pissed their IT sucks and clearly they don't have humans watching DM itineraries encountering IRROPs necessitating an overnight rebooking. I'm pissed they tried to lie to me.

I realize this rant may have come off diva-esque. It's just frustrating that I could have gotten out tonight if they had simply sent an email when the cancellation happened.

I know IRROPs happen. I just hate the terrible IT and the attempt to avoid putting me on another airline's flight.

I wish they had to pay me a farking change fee.

You're confident they sent the second email? You've never experienced different levels of communication during IRROPs? I'm saying their IT has a high error rate.