The 34% number is year over year. I haven't looked at 2019 to 2020 or 2020 to 2021.
Edit: found some numbers on the BLS website:
2020: -18.4%
2021 +1.4%
Those are airline ticket prices
Good questions.
CPI (I'm not using core CPI because no need to exclude food and energy over a longer period of time) from BLS statistics:
2019 2.3%
2020 1.4%
2021 7.0%
2022J .6%
F .8%
M 1.2%
A .3%
2019 through April 2022 Total: 13.6%
Projected CPI: well, the administration had told us that inflation was 'transitory' until recently. I don't think they've put out any updated forecasts.
I found a forecast from March 2022, but you'll laugh:
2022: 4.3% (we're already at 3.1% for the first four months of the year)
2023 2.7%
Like all government forecasts, these numbers are almost certainly WAY too optimistic.
CPI and airline ticket prices came from the bls website:
https://www.bls.gov/
Feel free to check my work; no guarantees that there aren't any errors.