i'm trying to get out of SLC to EWR earlier than my 1135pm redeye tomorrow, but most of the options are CO codeshare flights operated by DL/NW to one of their hubs, then on to EWR on CO metal... maybe this is just my sleep-deprived brain not thinking straight, but can i fly standby given that it's CO codeshare but they're not operating the flight? thanks...