DAL chance is probably 0%, unless the industry really changes or you have some seriously epic aviation or whole-person credentials. As for the rest of the Big-6, you might have a shot eventually if you accumulate thousands of hours, years of experience, and multiple type ratings.

Relatively "good" regionals, yes after some 135 TPIC. AA wholly-owned? I don't know, I think they may have hard standards for number of busts, you should ask around to see if anyone can share specifics.

There are lots of people who don’t bust the initial CFI....they’re smart enough not to take it til they’re ready.

Nick Foles said this after he won the super bowl. I think he’s spot on!

“I think the big thing is don’t be afraid to fail,” Foles said. “In our society today, with Instagram and Twitter, it’s a highlight. It’s all the good things. When you look at it, you have a bad day, you think your life isn’t as good, you’re failing. Failure is a part of life. It’s a part of building character and growing. Without failure, who would you be? I wouldn’t be up here if I hadn’t fallen thousands of times, made mistakes. We all are human. We all have weaknesses. Just being able to share that and be transparent.

“I know when people speak and share they’re weaknesses, I listen. Because I can (relate). I’m not perfect. I’m not Superman. We might be in the NFL and we might have just won the Super Bowl, but we all have daily struggles. That’s where my faith comes in. That’s where my family comes in. I think when you look at a struggle in your life, just know that it’s an opportunity for your character to grow.”

You stated that your checkride failures are not a reflection of the pilot you are today. Understood. What you need is something that does reflect the the pilot you are today, and that something will be found in building some distance and space and a spotless work history and track record. Three years is a start, but not a lot of time or distance.

There may be some valid reasons why your training was not a success, but you may also have some difficulty finding someone to listen to those reasons. First you need to get to that point, and what will get you there is establishing a strong work history. You can put the past behind you.

Others have noted that failed checkrides never go away, and they're correct. There's a balance to everything, however, and what you need right now is the ability to paint a picture of what you hope others will see in you.

Understand that the 121 world is neither the be-all nor end-all of aviation. There are many career paths, many choices. Not all of them are open to everyone; not everyone can find a military training billet. Not everyone has a degree. Not everyone has a future here or there, but that doesn't need to stay true forever, and likewise just because one direction is not the path, does not preclude another. Choose another method to skin the cat.

You can come back to the cat later, if you wish.

If you're instructing right now, look to 135. Look to ag, look to doing something else, somewhere, that involves your being vetted, checked, and approved under a program that's known and recognized. Go fly jumpers for a while. Spend a summer flying air attack on a fire contract. Go do air ambulance, cloud seeding, aerial photography or survey work.

The real question is how badly do you want it?

Did you go to " ALL ATPs"?
 

I've met many people that have multiple failures there.
I think some regional airlines will realize that some schools generate a high # of pink slips. Not sure what a major will think.

You didn’t answer yet.
It’s certainly not over yet but settle down.
You’re out of the fast lane.
Better get good at what you do before moving on.
I’ve missed two hiring booms in my career myself , I’ll never fly for Delta, get used to it.

And there are apparently many DPEs who make it a point to fail everyone on their first CFI-initial.

Yes, ATP is notorious for forcing students to take checkrides even if they are not prepared.

Try Mountain Air Cargo. Be willing to be assigned a base. It’s all C208. If you can fly basic IFR, you’ll do fine. If your basics are the root of the problem, it may be time to make tougher choices.

ATP strikes again!

I had a problem in this regard. I failed my initial commercial checkride twice by the same DPE. I did a little soul searching and resolved it to three different things:

Case 1) My flying skills are so poor that, despite my instructor’s best efforts, the FAA cannot certify me as a commercial pilot.

Case 2) I’m a competent pilot but was poorly trained by my CFIs and cannot be licensed by the FAA with my current flying standards.

Case 3) I’m a competent pilot, my CFIs trained me well but the DPE was gunning to fail me before the checkride even began.

So I went up with no less than three (3) CFIs who couldn’t find anything wrong with my flying ability. I then took the commercial checkride with a different DPE, who passed me with flying colors. Conclusion: the first DPE was a total prick and either trying to fail applicants or specifically part 61 applicants.

Now try explaining that to a potential employer.

I’ll continue on and get my CFI, CFII, MEI, maybe a seaplane rating or possibly add helicopter onto my list of checkride. If I fail another, I’ll give up on the idea of flying for a career.