Quick Summary:
- Allow 14 days to drive and stop properly across all eight states.
- Ten days works only with longer days and fewer small-town pauses.
- Choose 18 to 21 days for museums, detours, and proper rest days.
- Add one extra rental day for pickup, return, and a time zone buffer.
Route 66 runs roughly 2,400 miles between Chicago and Santa Monica, and the question is rarely whether you can drive it quickly, it is whether you will enjoy it. For most travellers, the right car hire length comes down to how many hours you want to drive each day, how many nights you want in classic Route 66 towns, and whether you will add big detours such as the Grand Canyon or Las Vegas.
A useful starting point is to plan around 170 to 220 miles per day for a comfortable pace. That distance keeps you on the road for about four to six hours most days once you include photo stops, roadside diners, short walks, and the slower speeds through historic town centres. If you regularly push 300 to 400 miles a day, you will finish sooner, but you will also skip the small details that make the route memorable.
Below is a realistic guide to how many days to rent a car for the full Route 66, with sample pacing and what you gain or lose at each duration.
What “full Route 66” usually means in practice
Because Route 66 is no longer a single continuous highway, “full” usually means following the best preserved alignments and key towns across Illinois, Missouri, Kansas, Oklahoma, Texas, New Mexico, Arizona, and California. You will often swap between interstate sections and historic stretches, and your total mileage can vary by 100 to 300 miles depending on how strictly you chase original alignments.
For car hire planning, assume you will need time for navigation, parking, and frequent stops. It is also wise to build in a buffer day. Weather, roadworks, and unexpected finds such as a local museum or a sunset viewpoint can easily change your schedule.
The ideal sweet spot: 14-day car hire
If you want a straightforward answer, two weeks is the most balanced car hire length for a full Route 66. Fourteen days gives you room to drive the full distance without feeling rushed, and still stop in the places that define the route.
With 14 days, you can typically manage 160 to 230 miles per day, with a few longer days in flatter sections and shorter days where there is more to see. It also allows for one or two slower days in high-interest areas, such as northern Arizona or the stretch between Oklahoma City and Tulsa if you enjoy neon signs and small museums.
Car hire logistics also tend to work well over two weeks. You can pick up in one city and return in another, which avoids backtracking. If you are comparing airport pickups, you can review options such as car hire Dallas DFW for a centrally connected hub, or build your flight plan around the coasts and connect by rail or domestic flight to your start point.
Fast but doable: 10 to 12 days
A 10 to 12-day rental is feasible for confident drivers who are happy with longer days. Think 250 to 320 miles per day on average, plus at least one very long day if you want time for the best preserved segments rather than staying on the interstate.
The trade-off is that many iconic stops become “drive-by” moments. You will still get highlights such as classic diners, a few neon towns, and the Arizona desert, but you may not have time for places that require a detour or an unrushed visit.
If you choose this pace, consider adding comfort to your car hire selection. A vehicle with supportive seats and enough boot space for luggage makes a bigger difference when you are driving six to eight hours most days. Also plan your overnight stops in larger towns where late arrivals are easier.
The immersive option: 18 to 21 days
If Route 66 is a once-in-a-lifetime trip and you want to treat it as a moving road holiday, 18 to 21 days is ideal. This length supports 120 to 180 miles on many days, leaving time for walks, local diners, short hikes, and quirky roadside attractions that you only discover once you are there.
Three weeks also lets you add major detours without stress. Popular add-ons include the Grand Canyon, Sedona, Las Vegas, or extra days on the California coast after reaching Santa Monica. You can also build in rest days to avoid driver fatigue, which becomes a bigger factor on long multi-state trips than many first-timers expect.
One-way rental, return planning, and why an extra day helps
Most full Route 66 trips are easiest as one-way car hire, picking up near the start and returning near the finish. One-way rentals can carry different fees and may have location limitations, so it is worth checking options early. You may find it convenient to start from a major airport pickup point and finish at another, especially if you are flying in from the UK.
Add one extra day to your rental if you can. This buffer helps with pickup time, jet lag, and any delays. It also protects you from return-day pressure. Dropping a vehicle off early, fuelling up, and reaching the airport is much easier when it is not squeezed into the same morning as a long final drive.
If your travel plans involve other US cities before or after Route 66, you can also compare car hire availability at key airports, for example Payless car rental New York JFK for an east-coast stopover, or car rental Boston BOS if you are combining the trip with New England.
If you are travelling with more people or extra luggage, consider space and comfort. Some groups prefer a larger vehicle category for long road days, and you can compare options like van rental Santa Ana SNA if you finish in Southern California and want room for everyone’s bags.
FAQ
How many days do most people take to drive Route 66? Most travellers plan 14 days because it balances driving time with stops, meals, and a few short detours.
Is 7 days enough for the full Route 66? Seven days is technically possible but very rushed, with long driving days and limited time in towns. It is better suited to a highlights-only approach.
Should I rent a car for extra days at the start or end? Yes, adding one extra day helps with pickup, jet lag, and avoiding a stressful return day, especially on a one-way itinerary.
How many miles per day is comfortable on Route 66? For most drivers, 170 to 220 miles per day feels comfortable while still leaving time for roadside stops and meals.
Do I need more days if I want the Grand Canyon? Add at least two days to include the Grand Canyon without rushing, plus another day if you want nearby scenic drives.
