getting to Trastevere

Are you wanting to know how to get there from the airport?

I can only help with how to get to the destination when I know where you are trying to get there from. Also, it is a fairly large area. Where exactly are you going?

Are you trying to get to Dar Poeta for some fabulous pizza?

Presuming that you are arriving from the airport...just take a cab. It's a bit pricey but after spending the night in a plane, possibly transferring somewhere to get Rome, just getting to where you are staying is worth the effort.
If you feel comfortable taking the train, that is an option...and then once at the Trastevere station, take the cab.
There are busses and trams that you could use but why make it complicated after long day of travel? Get to your accommodation, drop the bags, take a shower and go for a nice walk...have a spritz or two and enjoy a nice meal...

From where is the question of the hour...This is what we’ve got planned. We are staying in Trastevere on the same street as Dar Poeta (!) for 5 nights this summer. We will arrive by train to the main station, Termini, so we plan to take a taxi to our apartment (there are 4 of us). For the next five days we plan to walk, use google maps and/or https://www.atac.roma.it/?lingua=ENG to plot our way through Rome to the sites we want to see. When we leave Rome we fly to Paris so we will take a taxi from our apartment to the airport. This is how we plan to get around for 5 days. We are also flexible enough that we will grab a cab to get back to our apartment if we are out across Rome for the day and people are too tired to walk back or piece together a bus/tram ride back to our neighborhood.

Note that the tram now departs from Piazza Venezia and not Largo Argentina. It doesn't even stop at Largo Argentina, but there is a stop a short walk further along the street leading to Trastevere. Without knowing at least the general area where you'll be staying, it's difficult to provide good information regarding public transit options.

So sorry to leave this critical info out! From hotel Oceania on Via Firenze. Since I posted I've done a little more research on busses and it seems like the H bus will get me there. We've not used the bus system much when we've been there but it seems a little more clear with Google Maps. Anyone offering any other suggestions are welcome!

The bus system is very easy. Just be sure to buy your ticket ahead of time, from any tobacco shop, and validate in one of the ticket machines as soon as you get on the bus. Downloaded the Rome map into your offline Google Maps, before you get to Rome. Then while your there you can see where the bus routes and stops are. The ticket is good for buses, trams and the metro. We use public transportation a lot and usually by a multiday pass.

The H bus doesn't stop at the bus stop on Via Nazionale near Via Firenze when traveling towards Trastevere, so I always take the rarely-crowded #60 bus to Piazza Venezia and then walk around the corner to catch the #8 tram. Get off at the stop right after the bus makes the left turn into Piazza Venezia (near Mussolini's balcony) and you won't have to cross any busy streets. The H bus does stop near Via Firenze on its trip from Trastevere back to Termini, but sometimes in the evening it's a fairly long wait between buses. If that happens, take the #8 tram back to Piazza Venezia and then catch a #40 or #64 bus at the bus stop one short block towards the stairway to the Capitoline Hill.

I have also stayed on Via Firenze many times at the Hotel Aberdeen. And it's possible to get to Trastevere without a bus change, just requires a bit longer walk. Walk up Via Nazionale toward Piazza Republica. There is a bus stop where the H bus stops, about in front of the Santa Mari Degli Angeli Church entrance. There is a board above the stop showing which busses stop there and how long before the next one. The H bus will get you directly to Trastevere without having to change busses. Once you go across the Tiber River, the first stop is Sonnino/San Gallicano, which is the stop to go just about anywhere in Trastevere.

As background information, I have visited Rome 3 times in the past year and a half. I feel very comfortable riding the Metro. I was hesitant to ride a bus or tram because I wasn't sure it would be clearly shown in the bus/tram when I'd reached my exit. But, I did take the H bus to Trastavere. It was easy: I got on the bus in front of Termini and exited at the first stop after crossing the Tiber.