Nut Flush Draw w/ pair

[lonn19]

.25/.50 NL 6 max
CO is LAG
Stack sizes are approximate

SB ($32)
BB ($24)
UTG ($55)
MP ($30)
CO ($130)
Hero ($63.25)

Hero is dealt KcQs
UTG raises to 1.75, MP folds, CO calls, Hero calls, SB and BB fold.

Flop: As Ks 7s
UTG checks, CO bets 5.50, Hero calls, UTG calls.

turn: Qd
UTG checks, CO checks, Hero bets 15, UTG folds, CO calls.

River: Ah
CO goes all in, Hero?

I know this is a fold. My question is how could I have played differently after the flop and turn.

[TheRenaissance]

Fold preflop, flop ok, turn I'd check behind - think about what hands UTG and CO could have here. River ez fold.

[raiden]

Fold preflop. You just get into tough situations w/ KQo (RIO).
Flop is fine. Some times I might raise but agains two opponents call is maybe better.

I check behind on the turn and hope to hit the flush. We're usually behind their combined calling range.