OK, here is the helpful advice. Modern cars are very difficult(impossible in some cases) to open without a key even if you have a box of tools meant for the job - which I do. This is by design! The doors fit tightly, the lock mechanisms are shielded, deadlocks are common and if all the windows are electric you can't wind them down manually. All these things apply to Omegas, and so they are tricky.
Opening the car with a key is your best option. Which brings us back to having a spare that isn't in the car! Then your options revolve around getting the spare which is easier than moving a locked and otherwise immobile car. I did this for a customer who had locked their baby in the car; he had the idea of ringing his mother, but my suggestion of leaving her to watch the kid while I ran him home and collected the spare from his house half a mile away meant that the problem was solved quicker than any other way I know besides breaking a window. In 12 years of recovery work, I have never done that,and only had one job where the customer decided he was going to do it. Personally I think getting a replacement key cut from the VIN is a better route and is probably cheaper. I have met people stupid enough to carry their spare key on the same keyring.