You will need darkness to see the aurora. Isn't the flight over (from Europe to Seattle) during the day? If either flight will be at night, sit on the north side of the plane (right side coming over, left side on the return) for the best chance of seeing it.
In human anatomy, the inferior mesenteric artery, often abbreviated as IMA, is the third main branch of the abdominal aorta and arises at the level of L3, supplying the large intestine from the left colic (or splenic) flexure to the upper part of the rectum, which includes the descending colon, the sigmoid colon, and part of the rectum.
Its visceral branches provide blood to organs, while its parietal branches supply blood to the tissues of the abdominal body wall. The inferior phrenic artery is a parietal artery, the most superior branch of the abdominal aorta. It extends superiorly to provide blood to the diaphragm muscle at the top of the abdomen.