About the Drive vs Fly Calculator
This drive vs fly calculator compares the full cost and door-to-door travel time of taking the car, flying or catching the train for the same trip. Driving costs fuel, wear and tear, tolls and parking, and on long trips an overnight hotel; flying costs a ticket and checked bags for every traveller plus parking, rideshares or a rental car at the other end; the train sits somewhere in between.
It is built for families and groups deciding how to get to a holiday, business travellers weighing a 300–600 mile trip, and anyone who suspects the cheap flight is not really cheap once airport time is added. Because car costs are shared while fares are per person, the answer often flips as the group grows — try changing the number of travellers.
Flight time is entered as time in the air, and the airport overhead covers getting to the airport, security, boarding and baggage claim. Add a value for your time if hours matter to you as well as dollars; the cheapest option is then judged on total cost including time. Fares are for the whole trip per person, so enter round-trip prices for a round trip.
How to use the drive vs fly calculator
- 1Enter the one-way driving distance, the number of travelers and whether it is a round trip.
- 2Fill in your car’s mpg, the gas price, tolls and parking, and hotel cost for long drives.
- 3Enter the airfare and bag fees per person for the whole trip, plus airport ground costs.
- 4Add the train fare and journey time if a train is an option.
- 5Optionally set a value for your time, then compare total cost and door-to-door hours.
Formula and method
Driving cost is fuel (distance ÷ fuel economy × gas price) plus wear and tear per mile, multiplied by the number of legs (2 for a round trip), plus tolls and parking. If one leg takes longer than your maximum driving hours per day, an overnight hotel is added for each extra day on each leg. Car costs are shared, so they do not grow with the number of travelers.
Flying and train costs multiply the per-person fare (and bag fees) by the number of travelers and add ground transport. Door-to-door time is driving distance ÷ average speed for the car, and time in the air or on the train plus the airport or station overhead for the others, times the number of legs. If you set a value of time, each mode’s hours × value × travelers is added before choosing the cheapest.
- legs
- 2 for a round trip, 1 for one way
- wear
- Maintenance and tire cost per mile
- ground
- Airport parking, rideshares and rental car
Worked examples
400-mile round trip for two
Each 400-mile leg uses 14.3 gallons ($48.57) plus $40 of wear, so the round trip costs $177.14 plus $20 tolls = $197.14. Flying costs ($250 + $70) × 2 + $120 = $760 and takes 9 hours door to door; the train costs $270 but takes 16.5 hours. Driving is cheapest, $72.86 less than the train.
900-mile solo trip, valuing time at $40/hour
Driving 900 miles each way takes 15 hours, so each leg needs one hotel night: fuel and wear ($199.29 per leg) × 2 + $20 + $300 hotels = $718.57. Flying costs $280 and 10.5 hours. With time valued at $40/hour, flying totals $700 against $1,918.57 for driving.
Family of five, 250 miles one way
One car carrying five people costs about $35.42 in fuel and $25 in wear plus $20 tolls, $80.42 in total. Five airfares with bags cost $955 and five train tickets $340, so driving wins easily for a group.
Frequently asked questions
At what distance is flying better than driving?+
For most travelers, driving is competitive on time up to about 300–500 miles each way, because airport overhead adds three hours or more to every flight. Beyond roughly 500 miles, or when an overnight hotel is needed, flying usually wins on time and often on cost for solo travelers.
Is it cheaper to drive or fly for a family?+
Driving usually wins for families and groups because the car cost is shared while airfare and bag fees are paid per person. A trip that is cheaper to fly alone can be several hundred dollars cheaper to drive with four or five people.
What costs should I include when driving?+
Include fuel, wear and tear (tires, oil and maintenance, roughly 8–12 cents a mile), tolls, parking at your destination and any hotel nights on long drives. Depreciation can also be added to the per-mile figure if the trip adds significant mileage.
How much time should I add for the airport?+
Allow time to reach the airport, arrive about 2 hours before a domestic flight, board, then collect bags and get to your destination. Three hours of overhead each way is a reasonable default for domestic trips; international trips need more.
How does valuing my time change the answer?+
Setting an hourly value adds each mode’s door-to-door hours × value × travelers to its cost. A long drive that is cheapest in cash can become the most expensive option once a day of travel time is priced in.