I too am having issues with finding out what flights I was on while traveling between U-Tapao and CCK. I have a record of 315 TAW mission #475 leaving CCK at 0900 0n 3 Feb 71.
My DD214 doesn't list me as being in Vietnam but I do remember while on a return trip to CCK, we had to stop at Cam Rahn Bay for an engine change. While there I took a hop to Saigon and was able to get out of there a couple of days later. I was in-country I would say three days or so. If anyone knows about that particular situation, please let me know so I can add Vietnam to my DD214 paperwork.
BTW, I made three TDY trips from CCK to U-Tapao between 1970 1nd 1971.
Thanks for any assistance.
HV