Some people may disagree with me, but I think 350 replaces 340. 350's got a long range and it's extremely fuel efficient (more so than the new 787). 340 is a fo

Some people may disagree with me, but I think 350 replaces 340. 350's got a long range and it's extremely fuel efficient (more so than the new 787). 340 is a four engine airliner and it's not fuel efficient at all. That fact alone makes 340 pretty much obsolete. Operating costs for both 787 and 350 is probably much less than 340 (totally speculating here) so it's hard to justify operating 340s when there are much better airliners out there that can save you a lot of money in the long term. Operating other 4 engine airliners like 747 and 380 is justifiable because they carry way more people than 340 does AND their new models (380 is already a new plane and 747 has gotten an upgrade) are fuel efficient as well. 340s are already out of production and I'm pretty sure it's gonna be rare to see one of them in the skies over time. Which is a shame. I like 340s.