According to the U.S. Bureau of Labor Statistics, prices for other intercity transportation were 5.54% lower in 2020 versus 2018 (a $1.11 difference in value).

**Between 2018 and 2020:** Other intercity transportation experienced an average inflation rate of -2.81% per year.
This rate of change indicates significant deflation.
In other words, other intercity transportation costing $20 in the year 2018 would cost $18.89 in 2020 for an equivalent purchase.
Compared to the overall inflation rate of 1.37% during this same period, inflation for other intercity transportation was
significantly lower.

Raw Consumer Price Index data from U.S. Bureau of Labor Statistics for *Other intercity transportation*:

Year |
2018 | 2019 | 2020 |

CPI |
160.175 | 159.111 | 151.305 |

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Below are calculations of equivalent buying power for Other intercity transportation, over time, for $20 beginning in 2018. Each of the amounts below is equivalent in terms of what it could buy at the time:

Year | USD Value | Inflation Rate |
---|---|---|

2018 | $20.00 | - |

2019 | $19.87 | -0.66% |

2020 | $18.89 | -4.91%* |

CPI in 2020 / CPI in 2018 * 2018 USD value = 2020 USD value

Then plug in historical CPI values from above. The CPI for Other intercity transportation was 160.175 in the year 2018 and 151.305 in 2020:

151.305 / 160.175 * $20 =

Therefore, according to U.S. Bureau of Labor Statistics, $20 in 2018 has the same "purchasing power" as $18.89 in 2020 (in the CPI category of Other intercity transportation).