Originally Posted by
jrl767
I also flew DL939 IAD-SLC-SEA, which was a tail swap of 738s (and despite several rounds of negotiations, did NOT get credit for the two segments on a wholly domestic flight

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It's annoying that airlines do this. But whether it is the same plane, different planes, domestic, or international.... you'll never get two segments or actual MQM for a 1-stop direct flight if it is ticketed as such. You'll get 1 segment and MQM as the P2P distance ignoring the connection.