How the comparison works
Driving costs are mostly shared: one tank of gas serves the whole car. Flying costs scale with headcount: every traveler needs a fare and usually a bag. That is why group size flips the answer more than anything else. A solo traveler on a long trip often flies cheaper; a family of four on a medium trip almost always drives cheaper.
What people forget
- Bag fees are charged each way, so one bag is two charges.
- Airport parking and rides can add a hundred dollars or more.
- A rental car at the destination is a cost that driving avoids.
- Wear and tear. Fuel is not the whole cost of a mile; set the wear field to see it.
The full write-up, with the gas, airfare and ownership-cost sources, is in the guide: drive or fly for Thanksgiving 2026.