Driving across the United States is one of those experiences that sits on a lot of people's bucket lists. The open road, the changing landscapes, the freedom of going wherever the highway takes you. But before you leave the driveway, you need an honest fuel budget. The numbers are more manageable than most people assume, but they vary significantly depending on your vehicle, your route, and gas prices in the states you cross. This guide breaks down the real cost of driving coast to coast in 2026 with specific numbers for the most popular routes and vehicle types.
Expert Note
Use the GasBudgeter Road Trip Gas Calculator to plug in your specific route distance, vehicle MPG, and current gas prices for a personalized total before you finalize your plans.
The Three Most Popular Transcontinental Routes
I-90 Northern Route: New York to Seattle (~2,840 miles)
The northern route following Interstate 90 from New York City to Seattle covers approximately 2,840 miles. This is the longest of the three major transcontinental routes but also the one with the most dramatic scenery, crossing the Northern Plains, the Black Hills of South Dakota, and the Cascades. Gas prices along this route vary considerably, with the lowest prices found in Wyoming and Montana and the highest in the final stretch through Washington state.
I-80 Central Route: New York to San Francisco (~2,900 miles)
The I-80 central route from New York to San Francisco spans approximately 2,900 miles. This is the classic American road trip route that crosses the Midwest, the Salt Flats of Utah, and the Sierra Nevada before dropping into the Bay Area. The fuel cost challenge on this route is the final 300 miles through California, where gas prices are consistently 50 to 90 cents per gallon above the national average.
I-10 Southern Route: Jacksonville to Los Angeles (~2,460 miles)
The southern I-10 route from Jacksonville, Florida to Los Angeles covers approximately 2,460 miles. It is the shortest of the three routes and passes through some of the cheapest fuel states in the country, including Alabama, Mississippi, Louisiana, and Texas, before the price spike in California for the final stretch. This is often the lowest-fuel-cost option for a coast-to-coast drive.
What It Costs by Vehicle Type: The Real Numbers
All estimates below use a route distance of 2,800 miles and a blended fuel price of $3.65 per gallon, which reflects higher California prices diluted across the full multi-state route.
| Vehicle | Highway MPG | Gallons Needed | Total Fuel Cost |
|---|---|---|---|
| Toyota Prius | 52 | ~54 | ~$197 |
| Honda CR-V (loaded) | 29 | ~97 | ~$354 |
| Ford F-150 (2.7L EcoBoost) | 24 | ~117 | ~$427 |
| Full-Size SUV (loaded) | 16-17 | ~170 | ~$621 |
| Class C RV | 10 | ~280 | ~$1,022 |
Expert Note
For a family of four in a mid-size SUV getting 24 MPG highway, the fuel cost for a 2,800-mile coast-to-coast drive is approximately $425 total, or $106 per person. That breaks down to approximately $85 per day for a five-day trip covering 560 miles per day. Fuel is often the most manageable of the major road trip expenses when put in perspective.
State-by-State Gas Price Considerations
Your route choices can meaningfully affect your total fuel cost because state gas price differences can reach 80 cents per gallon between the cheapest and most expensive states.
- Cheapest states: Mississippi, Louisiana, Texas, Oklahoma, Missouri, Kansas, Wyoming, and South Carolina typically offer the lowest prices. Targeting fill-ups in these states saves meaningful money on a long trip.
- Most expensive states: California, Washington, Oregon, and Illinois near Chicago tend to run significantly above the national average. Plan to minimize fill-up volumes in these states by arriving with a full tank from a cheaper state.
Total Cross-Country Road Trip Budget Beyond Fuel
Fuel is usually the third largest expense on a cross-country road trip after lodging and food, but it is the most predictable and plannable. Here is a typical complete budget breakdown for a five-day coast-to-coast drive for two adults:
- Fuel: $200 to $650 depending on vehicle
- Lodging: $400 to $800 for five nights at mid-range motels
- Food: $300 to $600 for two adults over five days
- Tolls: $30 to $120 depending on route
- Miscellaneous: $100 to $200 for entertainment, park fees, and incidentals
- Total trip budget range: $1,030 to $2,370 for two adults in a mid-range vehicle
How to Minimize Your Cross-Country Fuel Costs
- Drive at 65 mph rather than 75 mph whenever conditions allow. The 15 percent fuel economy improvement at lower speed saves approximately $45 to $90 in fuel on a coast-to-coast run depending on your vehicle.
- Fill up in cheap states and time your California or Washington entry with a full tank. A 20-gallon fill at $3.20 in Texas versus $4.80 in California saves $32 on that single fill-up.
- Travel Tuesday through Thursday when possible. Gas prices peak Friday and Saturday due to weekend travel demand, and driving on cheaper days can save 8 to 12 cents per gallon.
- Use cruise control on the flat stretches of the Midwest and Great Plains for maximum efficiency benefits on long uninterrupted highway segments.
Frequently Asked Questions
How much does it cost in gas to drive from New York to California?
For the approximately 2,800-mile I-80 route, fuel costs range from approximately $197 in a Prius to approximately $621 for a full-size SUV at 2026 average gas prices. A mid-size sedan or crossover getting 30 MPG will spend approximately $336 in fuel for the complete journey from New York to Los Angeles.
How many days does it take to drive across the US?
Driving non-stop at legal speeds, the transcontinental routes take 40 to 45 hours of actual driving time. Most travelers split this into four to six days of driving, covering 500 to 700 miles per day with fuel, food, and sight-seeing stops. A comfortable cross-country pace of five days allows approximately 560 miles per driving day.
Which cross-country route is cheapest for gas?
The I-10 southern route from Florida to California is generally the cheapest for fuel because it passes through some of the lowest-price gas states in the nation, including Alabama, Mississippi, Louisiana, and Texas. The high-price California segment at the western end is unavoidable regardless of route, but the I-10 route minimizes high-price state exposure on the majority of the journey.
How do I find the cheapest gas on a cross-country drive?
Use the GasBudgeter Price Tracker and GasBuddy app in combination. Each morning, identify your planned stopping point for fuel and compare prices at stations near that location. Then fill up completely at the cheapest option rather than stopping at the first exit. Plan fills to land in cheaper states and avoid low-tank emergency fills in high-price states like California.
How much does a cross-country trip cost in a Tesla?
A Tesla Model 3 Long Range uses approximately 25 to 30 kWh per 100 miles at highway speeds. For a 2,800-mile trip, total energy consumption is approximately 700 to 840 kWh. At Supercharger rates of approximately 30 to 45 cents per kWh, total charging cost ranges from $210 to $378. This is comparable to a gasoline crossover in cost but eliminates the unpredictability of gas price variation across states.
Are there states where I should definitely fill up before entering?
Yes. Fill up completely before entering California from Nevada or Arizona, where prices are typically 40 to 80 cents per gallon cheaper. Similarly, fill up in Indiana before entering Illinois near Chicago, where city taxes push prices higher. And fill up in Wyoming before entering California via I-80.
How much should I budget for unexpected fuel costs on a cross-country trip?
Add 15 to 20 percent to your calculated fuel estimate as a contingency. This covers detours, unexpected price spikes in specific areas, higher consumption from mountain grades, and the real-world loading penalty from luggage and passengers. On a $400 fuel estimate, this means budgeting $460 to $480.
Is it worth renting a more fuel-efficient car for a cross-country road trip?
If you own a large truck or SUV and your planned route is 2,500 or more miles, renting a compact sedan or hybrid can genuinely save money versus your personal vehicle. Calculate the fuel cost difference between your vehicle and a 35 MPG rental for your planned miles. If the savings exceed the rental cost, renting makes financial sense for that specific trip.
How do mountain states like Colorado affect my cross-country fuel budget?
The I-70 corridor through the Colorado Rockies includes some of the steepest sustained grades on any major interstate. A vehicle that normally gets 28 MPG highway may achieve only 20 to 22 MPG through the mountain sections. Budget for a 15 to 20 percent fuel economy reduction for Colorado and any other route segments with significant mountain crossings.
Should I check my car before a cross-country drive?
Absolutely. A pre-trip inspection should confirm correct tire pressure for the loaded vehicle, fresh oil and coolant, functioning air filter, and no active check engine codes that could indicate fuel system issues. A vehicle in peak maintenance condition achieves fuel economy much closer to its rated figures than one with deferred service, and the gap matters significantly over 2,800 miles.
Does driving at night save gas on a long road trip?
The net fuel economy effect of night driving is very small. More importantly, lower nighttime traffic often allows more consistent speed maintenance. The primary advantage of night driving in summer is avoiding heat-related AC load. The primary disadvantage is increased fatigue risk, which is a meaningful safety concern on long drives.