itinerary queries

How many days do you have not counting the day you depart the USA and the day you return?

I would go straight to Sorrento on your arrival day from Rome and just take a daytrip to Pompeii from there. It is not that far.
Then go to Rome to Assisi to Cinque Terre to Venice to Salzburg

Mon-Thursday Rome - ok
Thursday-Saturday - you don't really have much time for the Amalfi coast. Do you want to stay in Sorrento or on the Amalfi Coast? Many do stop en route at Pompeii, but I question going to this area for only two nights.
Saturday-Monday Assisi - you need to check the transit time for this, as well as to Cinque Terre
Monday-Thursday Cinque Terre -- I'd reconsider this and add the time to the Amalfi Coast. You can get the same things in both places (coastal beauty/hiking, and March can be iffy weatherwise)--both in one trip eats a lot of travel time and is duplicative. You'll have to share why you want more time here than in Rome or Venice.
Thursday-Sunday - Venice

Carol - How many total days do you have for your vacation?

As I can make out, OP arrives Rome Tues March 10th and leaves Salzburg Mon. the 23rd

Weather could be a concern for CT in early March. 3 night CT and 2 nights Venice seems backwards to me.

Also think more nights in Rome and skip Amalfi Coast ( again check the weather) and it way off in the wrong direction for all your other destinations. Ostia Antica is a short trip from Rome and would satisfy the 'see an ancient Roman city' experience

No clue where home is for OP but Salzburg as the departure point is an interesting choice.

Too many far flung locations, too many too short stays, too much time spent in transit.
Looks like 13 nights?

Assuming flights are booked?

You are only giving Rome 2 nights which equals 1 full day, your first day is jet lag
2 nights Sorrento with a late in day arrival means 1 full day there- long way to go for such a short time
2 nights in Assisi- that's a long haul form Sorrento means only 1 full day (Looks like about 6.5 total with several train/bus changes)
Assisi to CT makes no sense- but you've given the most number of nights (3) to a place that might not be the best in March
Venice gets 2 nights that is 1 full day- You'll probably endue hating it- Venice need more time
Salzburg 2 nights- 1.5 days another long haul- 6-7 hour train

Consider
Rome- 4 or 5 nights with day trip to Pompeii- it's a long day but doable, recommend doing with a guided tour
Assisi- 2 nights this is a short trip from Rome
Venice 3 nights- (4 hour train from Assisi thru Florence)
Salzburg 3 nights (if you give Rome 4 nights add that other night here)

I like to use www.rome2rio.com to research my transportation options/travel time

Ditto to Christine's post, Carol: you've way too many locations for the time that you have, and they're too far apart. You'd be spending more time on transfer/transit processes than sightseeing!

As she's said, Sorrento is too far for just 2 nights, and it would be a REALLY long haul to Assisi from there. March isn't a great time for the CT, either: the ferries won't be running and there's little to do if Mother Nature doesn't cooperate; it could be cold, windy and wet, and trails are not safe or even open in that sort of weather.

Rome definitely needs more time - there's a LOT of ground to cover in that one - and Venice could use more as well. What with late winter weather being volatile, both offer more indoor things to enjoy on rainy, chilly days than the CT or Amalfi Coast. Ostia Antica is also a good substitute for Pompeii as it's so much closer to Rome.

I'd go with the Rome>Assisi>Venice itinerary suggested. 👍

The original plan only provides one full day in Venice, which is way too short to allow you to enjoy the city. You'd just be moving in lockstep with thousands of other tourists. So many people who see Venice that way don't like it. Don't be one of those people. Either skip Venice this time or add more time there.

Thank you all for your comments. With that in mind I have amended my itinerary. I did forget to mention that I am travelling in March with my granddaughter (age 16). We leave Toronto on March 9 and return on March 23. I have amended Rome to 3 nights, Amalfi Coast to 3 nights and Venice to 3 nights. The reason I want to include Amalfi is that it provides a hiking segment that we both will enjoy. I don't want to have just museums, art galleries, etc. And it gives us the opportunity to visit smaller communities. If anyone has suggestions of different activities we can do in these places, I would love to hear about them.
Carol

Please share the entire new itinerary--what have you eliminated? That way you can get transport tips and such.
I still think you need more time in each place--getting from place to place may take more time than you think!
Amalfi town is a good base for hiking, as you can just depart from town and do a loop--without having to take a bus or cab to a trail head.

Remember 3 nights means only 2 days. You really need to take your current itinerary and do a detailed version including travel times. I think you are still bouncing around way too much and will spend way too much time getting from one place to another. Sorrento to Venice is 12 hours!

I prefer to do Rome and north or Rome and south, not try to do both directions in one trip, especially in the amount of time you have.

Unlike in the US, where you might travel for 8 hours or more and not pass much of distinction, Italy has worthwhile things to see at least every few miles. You don't need to cover so much territory to see a lot of great places. In fact, you will see fewer if you move around that much because of all the dead time on trains.

Amalfi in March could be a bust. If the weather's bad, you won't enjoy hiking and the towns (villages really) are not very interesting, compared to others in Italy. The main attraction is the scenic coast, which needs clear, preferably sunny, weather.

I can't help you with scenic hiking. If you want to explore some charming towns, you could spend your nights in Bologna (about halfway between Rome and Venice) and day trip by train to Parma, Modena, Ferrara, Padua, Ravenna, among others. And you won't waste the better part of 2 days travelling to/from the Amalfi Coast.

An alternative to hiking in the Amalfi (which could indeed be a bust in early March)?

Take a look at the Appia Antica: the remains of the Roman Regina Viarum ("Queen of Roads") which once stretched from central Rome to Campania and eventually beyond. Constructed in 312 BC to efficiently move military personnel, supplies and equipment to the southern provinces, it was also a trade route and prestigious location of elaborate private villas and mausoleums, as burials were forbidden inside the city walls. A 10-mile or so piece of it closest to Rome is now a regional park, and our day spent walking a large chunk of that has been our most enjoyable adventure in Rome to date. Along with the crumbling remains of those tombs and villas are a couple of catacombs which provide interesting background on early Christian/pagan subterranean burial practices (small fee; tours required; tours in English available on a frequent schedule; no reservations needed.)

The further-out stretches are surrounded by countryside; very pleasant in the early morning! Anyway, there's MUCH more to the park than I've described but if interested in a fun walk, this one would eliminate a lot of time spent getting to/from the Amalfi Coast and the risk of late-winter weather complications. While you can get rained on in Rome as well, a longer stay provides more flexibility to work around wet days and the ability to choose this activity for a dry one. Oh, it can also be biked, although the section closest into the city can be pretty busy (believe it or not, it's still an active road!)

https://www.parcoappiaantica.it

If you don’t already have a place in Assisi, I recommend Istituto Beata Angelina which is right across from the Basilica. Book thru Monasterystays.com and request a room looking out at the basilica. Amazing view.