Playing a $10+$1 SnG on Pacific Poker, three of us left.

Dealer has $2490, calls.
SB has $690, calls.
BB (me!) has $820. I see 55 and check.

Flop: 5 J 3

Pot is $90
SB checks. The board is a rainbow with no real draws. Three-handed it's a good chance we all missed so I wanted to see if dealer hit at all or would at least try to buy the pot... I check.

Dealer bets $60, small folds, and I raise to $150. He re-raises me to $320 and I call.

Pot: $730
Turn: A

I check, he checks.

River: 9

What would you do here? I have $470 left, pot is $730, I'm in the money. Opponent limped in as dealer, bet 2/3rd pot to start with, but then re-raised me. Then just checked on turn. River's just been dealt, I'm first to act obviously. What's the move?

All-in on the flop.

agreed, when he re-raised you on the flop that was a great opportunity to get all the chips in.

If you only called you should bet out on 4th street.

How did it turn out?

I agree with the other two: all-in the re-raise.

In retrospect, I have no idea why I simply called his re-raise. Unless I thought he had pocket hooks (which I didn't), I clearly had him beat and should've had all my chips in while I had the best hand, instead of waiting to put them in after I was out-drawn.

As it turns out, he limped with AA and hit his trips on the turn. He would've called my all-in anyways so outcome would've been the same but at least then I would've known I played it right. Thanks for the help all.

Yep outcome would have been the same, either you way you lose all your chips here, but you like you said, at least you would've played your hand right.

Easy all-in on the river as well, if you decide to take the original line on earlier streets