It's very strange to me that both the outbound *and* the inbound have the same flight numbers, especially since one is non-stop and the other stops in CKB... hmmm. in any case, my experience is that with legs that have the same flight nuumber, you get the "non-stop" mileage. Normally, you'd get 500 each way, but with the same flight number in both directions.... dunno. Given the limited timeframe and if the extra $$$ aren't a huge issue, my sense would be to avail yourself of one of the other options posted here and guarantee yourself the 500 miles each way.. Good Luck!