Is it hard to drive to Denver?

The drive across Kansas is easy, but mountain driving requires caution.

How long is the flight?

The flight is approximately 2.5 hours.

Do I need a car in Denver?

Downtown is walkable, but a car is needed for mountain trips.

What is the best way to get to the mountains?

Rent a car or use the Snowstang bus service.

It is moderately priced compared to other major US cities.

Kirkwood

Denver

Flight Driving

Kirkwood to Denver

Updated: 31 May 2026

The journey from Kirkwood to Denver covers roughly 900 miles. Driving via I-70 West is the most direct route, taking about 14 hours. Alternatively, fly from St. Louis Lambert International Airport to Denver International Airport in about 2.5 hours. This route takes you across the plains of Missouri and Kansas before reaching the Rocky Mountains. Be prepared for changing weather conditions, especially during winter months.

Total Distance: 1,448 km driving distance; 1,220 km straight-line air distance.

Fastest Way

Flying from STL to DEN is the fastest method.

Cheapest Way

Flying is often cheaper than driving when factoring in fuel and hotel costs.

Compare Kirkwood to Denver Routes

	Flight Direct	Driving Direct
Duration	2 hours 30 mins	14 hours
Avg Price	$120-$300	$150-$220 in fuel
Operator	Southwest Airlines	Personal Vehicle
Route	STL to DEN	I-70 West all the way to Denver.
Tip	Southwest allows two free checked bags, perfect for ski gear.	Kansas can be monotonous; plan for frequent stops.

Travel Tips

Altitude Sickness
Denver is a mile high; drink plenty of water to adjust to the altitude.
Winter Driving
If driving in winter, ensure your vehicle has snow tires or chains for mountain passes.
Sun Protection
The sun is stronger at high altitudes; wear sunscreen even in winter.
Public Transit
The RTD light rail system is excellent for getting from the airport to downtown.
Weather Changes
Colorado weather is unpredictable; always dress in layers.

Safety Tips

Mountain Safety
If driving into the mountains, stay alert for steep grades and sharp curves.
Hydration
Dehydration is common at high altitudes; carry a water bottle.
Emergency Prep
Keep a winter emergency kit in your car if traveling between November and April.
Wildlife
Be cautious of wildlife on mountain roads, especially at dawn and dusk.