| Year | Date | Historical Events |
| 1942 | Sep 30 | Keel laid down by the Electric Boat Co., Groton, CT. |
| 1943 | Jun 20 | Launched. |
| | Sep 25 | Commissioned with LCDR. Reuben T. Whitaker in command.
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| | Dec 15 | Flasher arrived at Pearl Harbor, HI. from New London, CT., to prepare for her 1st war patrol. |
| 1944 | Jan 6 | Flasher sailed on her 1st war patrol, bound for her patrol area off Mindoro. |
| | Jan 18 | Flasher sank her first target, sending a 2,900 ton former gunboat to the bottom. |
| | Feb 5 | Flasher sank a freighter off Manila. |
| | Feb 14 | Flasher sank 2 cargo ships of the same convoy. The 2 vessels sunk were the Minryo Maru and the Hokuan Maru. |
| | Feb 29 | Flasher arrived at Fremantle, Australia to refit. |
| | Apr 4 | Action bound once more, Flasher departed Fremantle, Australia for the coast of French Indochina on her 2nd war patrol. |
| | Apr 29 | Flasher contacted the river gunboat Tahure guarding a freighter off Hon Doi Islands, and sank both. |
| | May 3 | Flasher sank a large cargo ship in the Sulu Sea. |
| | May 28 | Flasher arrived at Fremantle, Australia for refit. |
| | Jun 19 | Flasher made her 3rd war patrol in the South China Sea. |
| | Jun 28 | Flasher contacted a heavily escorted convoy of 13 ships. She made a cautious approach, undeterred by the escort. |
| | Jun 29 | Shortly after midnight,Flasher broke into the convoy to sink a freighter and badly damage a large passenger cargo ship. |
| | Jul 7 | Flasher sank a freighter. |
| | Jul 19 | Flasher sighted the cruiser Oi escorted by a destroyer. 2 attacks, sufficed to sink this choice target, a fact confirmed several hours later when a periscope observation revealed only the destroyer in sight. |
| | Jul 26 | Flasher sank another important target, a merchant tanker, and the same day damaged another tanker later sunk by one of her sisters. |
| | Aug 7 | With all her torpedoes gone, Flasher put back for Fremantle, Australia, where she replenished and refitted. |
| | Aug 30 | During her 4th war patrol, in the Philippines, Flasher headed a coordinated attack group which included two other submarines, Hawkbill and Becuna. Although she was on lifeguard station during part of this patrol, Flasher sank 3 ships. |
| | Sep 18 | Flasher sank a former light cruiser. |
| | Sep 27 | Flasher sank a transport ship. |
| | Oct 4 | Flasher sank a cargo ship. |
| | Oct 20 | Flasher returned to Fremantle, Australia. |
| | Nov 15 | Heading the same attack group, Flasher now commanded by LCDR. G. W. Grider, sailed on her 5th war patrol, bound for Camranh Bay. |
| | Dec 4 | One of Flasher's companions reported a tanker convoy, and she set a course which would bring her to the target. As she made her approach, a destroyer suddenly loomed up before her, and Flasher launched her first spread of torpedoes at the escort. |
| | Dec 4 | (Cont'd.) The destroyer was stopped by 2 hits, and began listing and smoking heavily. Flasher got a spread of torpedoes away at a tanker before she was forced deep by a second destroyer, which dropped 16 depth charges. |
| | Dec 4 | (Cont'd.) Rising to periscope depth, Flasher saw the tanker burning and covered by yet a 3rd destroyer. Reloading, she prepared to sink the destroyer and finish off the tanker, and though almost blinded by rainsqualls, she did just this with 4 torpedoes. |
| | Dec 4 | (Cont'd.) 2 of which hit the destroyer, and 2 of which passed beneath her as planned to hit the tanker. Once more, counter-attack forced Flasher down, and when she surfaced she found no trace of the two damaged destroyers. |
| | Dec 4 | (Cont'd.) The tanker, blazing away, was still guarded by 3 escorts until abandoned at sunset, when Flasher sank her with one torpedo. The 2 destroyers, both found after the war to have been sunk, were the Kishinami and Iwanami. |
| | Dec 4 | (Cont'd.) Flasher's war patrol reported that her count of destroyers may have been inaccurate, but this seems to have been ignored, and it is likely that "Flasher" actually finished off previously crippled Kishinami and did not hit any other destroyer. |
| | Dec 21 | Flasher contacted another well-guarded tanker convoy, and she began a long chase, getting into position to attack from the unguarded shoreward side. In rapid succession, Flasher attacked and sank 3 of the tankers. |
| | Dec 21 | (Cont'd.) Receiving no counter-attack, the enemy apparently believed he had stumbled into a minefield. One of these tankers was the largest she sank during the war, the other 2, of the same displacement, were tied for 3rd largest.
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| 1945 | Jan 2 | Flasher returned to Fremantle, Australia for refit. |
| | Jan 29 | Flasher made her 6th war patrol on the coast of Indochina. |
| | Feb 21 | Flasher sank a sea truck by surface gunfire. |
| | Feb 25 | Flasher sank a cargo ship with torpedoes. |
| | Apr 3 | Flasher completed her patrol upon her arrival at Pearl Harbor, HI., and sailed a few days later for a West Coast overhaul. Bound for Guam on her 7th war patrol, at the close of the war, Flasher was ordered back to New London, CT.
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| 1946 | Mar 16 | Decommissioned at New London, CT. and placed "In Reserve" in the Atlantic Reserve Fleet. |
| 1959 | Jun 1 | Struck from the Naval Register. |
| 1963 | Jun 8 | Flasher was sold for scrap. Her conning tower was removed and placed on display as a memorial at the entrance to Nautilus Park, a Navy housing area in Groton, CT. |