Yes, flying saves over 17 hours of travel time.

How long is the drive?

Typically 18 to 20 hours of pure driving time.

Yes, the Amtrak California Zephyr runs from the Bay Area to Denver, but it takes over 30 hours.

What is the best way to get around Denver?

The RTD light rail and bus system are very efficient.

Yes, but like any major city, be cautious in less populated areas at night.

Millbrae

Denver

Flight Driving

Millbrae to Denver

Updated: 28 May 2026

The distance from Millbrae to Denver is approximately 2,000 kilometers. Flying from SFO to Denver International Airport (DEN) is the most practical method, taking about 2.5 hours. Driving is a major cross-country undertaking, taking 18 to 20 hours via I-80 East. Flying is highly recommended to avoid the long, arduous drive through the desert and mountains.

Total Distance: 2,000 km driving, 1,500 km air distance.

Fastest Way

Flight, taking only 2.5 hours.

Cheapest Way

Driving, if you have multiple passengers to share costs.

Compare Millbrae to Denver Routes

	Flight Direct	Driving Direct
Duration	2 hrs 30 mins	20 hrs
Avg Price	$150 - $350	$250 - $350 (fuel)
Operator	United Airlines, Southwest	N/A
Route	SFO to DEN.	I-80 East.
Tip	DEN is a major hub with many direct flight options.	Prepare for high-altitude driving and potential snow.

Travel Tips

Airport Transit
Use the A-Line commuter train from DEN airport to downtown Denver.
Altitude
Denver is at a high altitude; drink plenty of water to avoid altitude sickness.
Flight Booking
Book early, as flights to Denver are popular for both business and leisure.
Driving Route
If driving, check weather reports for mountain passes, especially in winter.
Weather
Denver weather is unpredictable; pack layers for all seasons.

Safety Tips

Driving Safety
Be cautious of high winds and sudden snowstorms on I-80 in Wyoming.
Airport Security
Arrive at SFO at least 2 hours early.
Urban Safety
Stay aware of your surroundings in downtown Denver, especially at night.
Emergency
Keep a winter emergency kit in your car if driving.