No, there is no direct passenger train service between Flagstaff and Denver.

How long is the drive?

It typically takes 9 hours depending on traffic.

Is the flight reliable?

Yes, United Airlines offers reliable service from FLG.

What is the best time to leave?

Early morning to avoid the heat and traffic.

No, the highways are toll-free.

Flagstaff

Denver

Flight Driving

Flagstaff to Denver

Updated: 28 May 2026

The journey from Flagstaff to Denver covers approximately 850 km. You will take I-40 East to Albuquerque and then transition to I-25 North toward Denver. This drive takes about 9 hours. Alternatively, you can fly from Flagstaff Pulliam Airport (FLG) to Denver International Airport (DEN) with a connection. The drive offers a spectacular journey through the high desert and the Rocky Mountains.

Total Distance: 850 km driving, 700 km air distance.

Fastest Way

Flight via Phoenix, taking about 4 hours total.

Cheapest Way

Driving your own vehicle is the most cost-effective option.

Compare Flagstaff to Denver Routes

	Flight Connecting	Driving Direct
Duration	4 hours	9 hours
Avg Price	$250 - $450	$100 - $150 in fuel
Operator	United Airlines	Personal Vehicle
Route	FLG to PHX to DEN	I-40 E to I-25 N
Tip	Flying is much faster than driving but requires a connection in Phoenix.	The drive through the mountains can be challenging in winter; check road conditions before leaving.

Travel Tips

Altitude
Denver is at a high altitude; stay hydrated to avoid altitude sickness.
Traffic
Denver traffic can be heavy; avoid driving during rush hour.
Parking
Parking in Denver can be expensive; use apps to find affordable lots.
Public Transit
Denver has a good light rail system; consider using it.
Weather
Denver weather can change rapidly; dress in layers.