We're planning a trip to see family for Christmas. It's a trip from Denver to the SF Bay Area with our family of 4. I had a good idea of how I plan to travel already, but I wanted to measure both the cost difference and emissions difference from flying.
We are taking some detours on this trip, so it is not the most economically or emissions efficient route. We are departing after the kids get out of school on Friday, which adds a hotel night. We are also taking them to Circus Circus (which I may regret), and doing a couple hundred mile detour through Death Valley to see the sights. The drive is as much a part of the experience as the destination.
FlyingCosts: Estimated $1,650 for the flight, and another $1,200 for a rental car for a total of $2,850.
Emissions: 2.14 metric tons per my preferred calculator (
https://coolclimate.berkeley.edu/calculator)
Driving by Gas Car (this is a hypothetical, as I don't own a gas car)
Costs: $920 assumed for hotel stays (3 days each direction; we may cut it to a single night on return, which would cut this dramatically). We would spend about $420 on gas assuming 25mpg and $3.75/gallon average. This gives us a total cost of $1,295.
Emissions: emissions from gasoline are 18.73lbs/gallon, creating 0.95 metric tons of emissions. Driving a gas car is more than a 50% savings over flying, although the math would be very different with one plane ticket instead of 4x.
Driving our EVCosts: We have the same $920 assumption for hotels. I'm assuming roughly 1,050kWh added from DC Fast chargers (1,330kWh total usage including residential charging and hotel charging) at an average rate of $0.45/kWh. This works out to $475 in charging expenses. So total costs will be around $1,395, which is slightly above that of a 25mpg car.
Emissions: Using the US average rate of 823lbs/kWh and 1,330kWh total, that works out to about 0.5 metric ton. In technical emissions accounting, this would actually be 0, as the major EV charging networks have renewal PPA's in place. But I think the actual average emissions is more useful for this purpose.
In summary, taking an EV for this trip is roughly 75% lower emissions than flying and costs roughly half as much. And we get to see a new national park along the way. With average household emissions in the US being around 15 tons, saving ~1.6 tons for a single trip is a meaningful reduction.