checking in when i have two flights leaving the same time
 

is there any reason i would have issues by check-in if i have another flight in the system that i don't want to check-in for? i had originally booked a flight but decided i didn't want to take that one and it would cost more to cancel so i just booked another without canceling the initial one. They are on two different airlines. Thanks

If they are two different airlines there is no problem. It won't cost you "more to cancel the flight". You would just lose all the cost of the flight, which you will do anyway by no-showing.

checking in when i have two flights leaving the same time
 

But this way the airline can't resell the seat ;)

Not sure why the OP wouldn't want to cancel the flight s/he is not using--I'd assume there ought to be some residual value left on the ticket that can be used at a later date over the next 12 months.

And if there is residual value and you don't cancel your reservation, with most airlines you will lose that residual value.

it may sound weird but i assure you it would as i stated it will cost me additional money over the initial cost if i want to cancel

Perhaps you should explain that as it doesn't make any sense.

Unless, of course, you're playing "Hidden City" on one ticket and don't want to cancel the final leg.

getting warm :)
nonetheless the question still stands even without full explanation

And the question was answered in post #2. I find the deliberate obfuscation a little ridiculous, but whatever.

i am sorry, i was not intending to be confusing at all. i was under the impression that my reasoning behind not wanting to cancel would have no effect on the answer.
i did not specify exactly what i was doing as then it would be not to hard for the airline lurkers to track me down and make me issues, as what i am doing is not common in the slightest yet the airline would shut me down right away.
P.S. they have done that to me before for precisely this reason

Say, the ticket cost $150 and the change fee is $200. No residual value. None. Negative, even.

I wouldn't cancel it either; in the event WX happens, then I could get the full $150 back. It's a free option.

I think there's a misunderstanding here about how change fees work. There's no fee to simply cancel a ticket. You can always walk away and owe nothing more than you paid to purchase the ticket.

The change fee comes at the time of rebooking. If you want to reuse part of a canceled ticket, the airline subtracts the change fee from the ticket's value and applies that balance to your next purchase. If the fee is more than the ticket cost, the balance is zero. There is no such thing as a negative balance. For example, if your first ticket cost $109 and the change fee is $150, you don't have to pay the extra $41. You just buy the new ticket with no credit carried over from the previous ticket.