Is there a train to SF?

Amtrak's California Zephyr goes to Emeryville, where you can take a bus connection into San Francisco.

What is the best airport?

SFO is the primary international airport, while OAK is a good alternative across the bay.

How long is the drive?

It takes about 30 hours of driving time, usually split over three to four days.

No, San Francisco is very walkable and has excellent public transit compared to other US cities.

Yes, the route is well-traveled, but be prepared for mountain passes and potential winter weather.

O'Fallon

San Francisco

Flight Driving

O'Fallon to San Francisco

Updated: 28 May 2026

The journey from O'Fallon to San Francisco spans approximately 2,000 miles. You can fly from St. Louis Lambert (STL) to San Francisco International (SFO) in about 4.5 hours. Driving involves taking I-70 West to I-80 West, crossing the Rockies and the Sierra Nevada mountains. This is a scenic route that takes you through diverse landscapes, from the plains of the Midwest to the coastal hills of Northern California.

Total Distance: 3,218 km driving, 2,700 km air distance.

Fastest Way

A direct flight from STL to SFO takes 4.5 hours, saving you over 25 hours of travel time.

Cheapest Way

Flying is generally the most economical option when considering the high cost of fuel and overnight stays for a 30-hour drive.

Compare O'Fallon to San Francisco Routes

	Flight Direct	Driving Direct
Duration	4 hours 30 mins	30 hours
Avg Price	$200 - $600	$400 - $700 in fuel
Operator	United Airlines	Personal Vehicle
Route	STL to SFO	I-70 W to I-80 W
Tip	SFO can experience fog delays; check your flight status before heading to the airport.	Be prepared for snow on the Donner Pass in the Sierra Nevada during winter months.

Travel Tips

Layers
San Francisco weather is famously unpredictable; always carry a light jacket or sweater, even in summer.
Public Transit
Use the BART system to get from SFO to downtown and the historic cable cars for a classic city experience.
Parking
Parking in the city is extremely difficult and expensive; rely on public transit or rideshares instead.
Walking
The city is very hilly; wear comfortable walking shoes and be prepared for steep inclines.
Reservations
Book popular restaurants and attractions like Alcatraz tours well in advance.

Safety Tips

Vehicle Security
Never leave anything visible in your car, as break-ins are common in tourist areas.
Neighborhoods
Be aware of your surroundings, especially in areas like the Tenderloin, which can be rough at night.
Emergency
Keep a list of local emergency numbers and a physical map in your car for remote stretches of I-80.
Pedestrian Safety
Be cautious when walking in busy areas; always use crosswalks and obey traffic signals.