The following is a trip that I would like to take.

YVR CX HKG CX TPE CX TYO CX X/TPE CX X/HKG CX SYD QF BNE QF X/SYD QF AKL QF X/SYD CX X/HKG CX LON BA AMS BA X/LON BA DXB BA X/LON AA NYC AA X/ORD AA ANC AA X/ORD AA NYC CX YVR END!!

Is the routing valid for a 4 continent OWE fare? Or am I connecting in HKG, LON, and NYC too many times?

ORD-ANC?

The only flights AMR is flying to ANC are via Saint Louis on TWA (which you can't use). Otherwise, it is fine. AA flies from Dallas to Anchorage, but it is seasonal. I don't remember when it stops, but it is within a couple of weeks or so.

How about I do ...NYC AA X/DFW LAX AA SFO AA X/DFW AA X/NYC CX YVR END instead?

It is very important for me to fly CX from NYC to YVR (best quality)

What is your objective with your connections? For example, NYC-DFW-LAX is about 150 miles more than a non-stop NYC-LAX. If you're after the miles connecting in MIA will give about 1,000 miles more than the non-stop, connecting in SJU will give 2,500 more. If you're not after miles why bother changing at DFW? Same for SFO-NYC.

Only one transcontinental flight is allowed !! (I had already used NYC-YVR for it)

There were several posts here a month or so ago saying that the limit of one transcontinental flight is gone. Maybe someone can confirm?

Can confirm it isn't, unfortunately.

Daniel, it really depends on what your objective is. Are you flying just for miles? What are the places you want or need to stop at? What class are you flying? For example, I wouldn't go too far out of my way to fly CX on that route if you are in J. I would personally rather fly JFK-LAX on the flagship, then LAX-DFW-YVR. But that's just me. If you are flying in F, then good luck on getting CX to book you for the JFK-YVR sector without waitlisting you. Unless they have changed their tune, they don't offer A on the sector until they know they won't sell the seat to someone continuing on to HKG. As another example, you have a funny hop back and forth to TPE from Hong Kong. Do you need this? Or is it a way to just fly more 747 on CX? If the latter, you can get more for your money by flying to Jakarta.

To take your first question at face value, then you just need to change the ANC segments to something else.

Maybe do LON-LAX-DFW-JFK-YVR or something. You can transit or stop at a city as many times as you want, as long as you mind the segment limits. They put a transit max rule in a while back for certain cities (LON, HKG), but quickly dumped it as they realized how impractical it was.

It looks like he's stopping in HKG, TPE and TYO though. Of course, you may fly to SIN and catch either QF or BA to SYD.

the rules in sabre say (as of today):

172N . 6. WITHIN THE US/CANADA - 1 NONSTOP OR
173N . SINGLE PLANE TRANSCONTINENTAL FLIGHT
174N . PERMITTED. TRANSCONTINENTAL FLIGHT IS
175N . DEFINED AS TRAVEL BETWEEN THE
176N . FOLLOWING CITIES:
177N . BWI/BOS/FLL/BDL/ LAS/LAX/OAK/
178N . MIA/EWR/NYC/ORL/ - AND - PDX/SAN/SEA/
179N . PHL/SJU/YYZ/DCA SFO/SJC/YVR

What if I do the following instead:

YVR CX NYC CX HKG...ASIA...AUSTRALIA...X/ASIA..EUROPE..LON AA X/LAX AA SEA (Take bus home to YVR and go home for a few months, take bus back to SEA and use the remaining portion of ticket for a North American holiday) AA X/DFW AA MIA AA X/DFW YVR END

Change one thing. lon-dfw-sea instead of lon-lax-sea. AA doesn't have a direct LAX-SEA flight, so you will avoid a segment charge. Otherwise, it is fine.

old:
1. yvr-nyc
2. lax-sjc
3. sjc-sea
4. sea-dfw
5. dfw-mia
6. mia-dfw
7. dfw-yvr

new:
1. yvr-nyc
2. dfw-sea
3. sea-dfw
4. dfw-mia
5. mia-dfw
6. dfw-yvr

I don't know the rules as far as returning to your origin city, as those are different for the US and Canada when compared to everywhere else. Talk to the RTW desk and see if you can go into YVR more than once. That would save you a bus ride.

"Travel via the original point of origin is not permitted." So you will not be able to re-transit YVR. Also, you need to remember that USA/Canada are considered same country for the purpose of this fare and, you are only allowed two stopovers within the same continent of origin. Surface travel between SEA-YVR is considered a stopover.

yes. your itin is fine. i am pretty sure u can't go back to point of origin in any case.
(i think AA said canada and US is considered as "one country" as far in OWE context. but SEA and YVR are different locations)

I still count 3 stopovers in continent of origin which is not permitted.

Your itin shows a stop in JFK, SEA and MIA.

Only 2 stopovers permitted in continent of origin.

Not if I stay in MIA for less than 24 hours.

Or I could do LON AA X/LAX AA X/DFW AA SEA AA X/DFW AA YVR ENDinstead.

I just want to get the most out of my OWE