Will the sun set?
 

I'm taking UA 930 SFO-LHR tomorrow (1:01PM - 7:10AM) and wondering if my flyertalkers would know if with this route (probably over the artic circle) and it being June, will the sun completely set or will the flight be in total daylight?

:cool: ...if we have an extended sunrise/dawn

My experience with that flight last year around this same time is, yes - it sets about 6 hours into the flight and it remains dark until approach in LHR begins...YMMV. Enjoy the flight!

Well, if you go to the Great Circle Mapper, you'll see that the flight path doesn't go that far into the arctic circle... so yeah, you should see sunset, probably around 10pm local time, which is about 6 hours into the flight as dll said. However, sunrise at LHR is at ~4:45am tomorrow so you should get some sunlight for the last couple of hours.

(Night may not be totally dark, either, i.e. you will probably see at least a faint glow to the north... but this is just an educated guess, I haven't actually flown this route.)

You'll definitely see a glow in the north. It will not be completely dark.

SFO to FRA on 5/25 or so last year (2pm departure), I was surprised to see how light it stayed most of the flight. We have beautiful shots of Greenland in daylight, so if your concern is sleeping with it not being completely dark, better to be prepared with eyeshades. You can bet someone will be bored and open window shades (like we did, as discreetly as we could).

It won't matter, since you have the shades down.

You will see a sunset. The rest depends on the flight path of the day. If you get up north enough, you will see no real darkness. If you stay further down it will be getting dark for a few hours.