Bus Tickets from Ontario, CA to San Ysidro, CA

Find affordable bus tickets from Ontario, CA to San Ysidro, CA with flexible options. Book your trip now

Join 75M+ travelers booking 2M+ routes across 85+ countries.
Enjoy our 24/7 customer service to assist you at every step.
Cancel anytime and receive a 100% refund, no reason needed.
TodayAug 7
from $42
TomorrowAug 8
from $38
SatAug 9
from $37
SunAug 10
from $42
MonAug 11
from $42
TueAug 12
from $42
WedAug 13
from $42
ThuAug 14
from $42

Cheap buses leaving tomorrow

One passenger / one way

  • This trip is recommended because it is: Cheapest
    Departure time: August 8 at
    Departure city: Ontario
    Departure location: Montclair / Ontario / Claremont
    Arrival time: August 8 at
    Destination city: San Ysidro
    Destination location: San Ysidro Bus terminal
    Operated by: Greyhound Lines, Inc. + FlixBus
    Greyhound Lines, Inc. + FlixBus
    Vehicle: BusDuration:
  • This trip is recommended because it is: Fastest
    Departure time: August 8 at
    Departure city: Ontario
    Departure location: S Euclid Avenue
    Arrival time: August 8 at
    Destination city: San Ysidro
    Destination location: San Ysidro Bus Station
    Operated by: Executive LinesExecutive Lines
    Vehicle: BusDuration:
  • Departure time: August 8 at
    Departure city: Ontario
    Departure location: Montclair (Ontario)
    Arrival time: August 8 at
    Destination city: San Ysidro
    Destination location: San Ysidro Bus terminal
    Operated by: FlixBus + Greyhound Lines, Inc.
    FlixBus + Greyhound Lines, Inc.
    Vehicle: BusDuration:
  • Departure time: August 8 at
    Departure city: Ontario
    Departure location: Montclair (Ontario)
    Arrival time: August 8 at
    Destination city: San Ysidro
    Destination location: San Ysidro Bus terminal
    Operated by: FlixBusFlixBus
    Vehicle: BusDuration:
  • Departure time: August 8 at
    Departure city: Ontario
    Departure location: Montclair / Ontario / Claremont
    Arrival time: August 8 at
    Destination city: San Ysidro
    Destination location: San Ysidro Bus terminal
    Operated by: Greyhound Lines, Inc.Greyhound Lines, Inc.
    Vehicle: BusDuration:

Accepted payments

  • Visa
  • MasterCard
  • American Express
  • China Union Pay
  • Diners Club Canada
  • Discover Click to Pay
  • JCB payment
  • Klarna (Pay over time)
  • Google Pay

Bus Ontario, CA to San Ysidro, CA: Trip Overview

Average ticket price$42
Average bus trip duration5h 25m
Number of daily buses18
Earliest bus departure4:20am
Distance109 miles (175 km)
Latest bus departure10:25pm

Ontario to San Ysidro Bus

Busbud shows you the best bus ticket fares and bus schedules so you can easily plan and book a trip by bus from Ontario to San Ysidro.

We make it our job to connect you with the most dependable bus companies that cover bus service from Ontario to San Ysidro.

Whether it is cheap bus tickets or more luxurious buses going to San Ysidro from Ontario, we help you find what you're looking for based on how much of a budget you have.

Frequently asked questions for your trip Ontario, CA - San Ysidro, CA

Find cheapest prices for buses

Price is for a one-way ticket for one passenger and based on past searches.

Best price found
08/05
$42
08/06
$42
Today
$34
08/08
$31
08/09
$29
08/10
$34
08/11
$40
08/12
$39
busbud logoThe cheapest trip from Ontario, CA to San Ysidro, CA was searched and found on Aug 9, 2025 with a price of $29

To save money and be sure you have the best seat, it's a good idea to buy your bus tickets from Ontario, CA to San Ysidro, CA, as early as possible.

You can expect to pay from $29 to $61 for a bus ticket from Ontario, CA to San Ysidro, CA based on the last 2 days. You can expect to find the cheapest price for the trip at $29 which is on 2025-08-09.

Usually LLIO will charge you higher prices for tickets closer to the departure date. To find the best prices, you should be flexible on your date of travel.

About Bus Travel

Bus Travel Tips

If you're abroad, study some local language. Not only could it get you out of a pickle during your bus trip from Ontario to San Ysidro but it'll also be endearing to native speakers who will surely appreciate your effort.

From miles long of beauteous natural landscapes to impressive man-crafted sights, you're bound to be in for a visual treat on your bus trip from Ontario to San Ysidro.

Buses are energy-efficient. Carrying a passenger over 100 kms by coach only takes 0.6-0.9 liters of gas. Compare that to the 2.6 liters required by high-speed train, 6.6 liters by airplane and 7.6 liters by gas-powered car, and it's clear that the bus is a more environmentally-conscious option for your bus transportation from Ontario to San Ysidro.

Make a music playlist for your bus ride from Ontario to San Ysidro, and enjoy the scenery to tunes from your own personal soundtrack.

Did you know?

The word 'bus' is an abbreviation of 'omnibus" which means 'for all' in Latin as buses were meant to be transportation for everybody.

The bus driver with the longest career in the world drove more than 2,000,000 miles and is a happy World Record holder.

The average number of passengers on a coach bus is 32 meaning that a bus could replace a minimum of at least 30 cars!

Will you be returning to Ontario, CA by bus?

Bus from Ontario, CA to San Ysidro, CA

Why choose Busbud?

The Best Way To Book Bus and Train Tickets

Busbud helps you easily search, compare and book intercity bus tickets on a worldwide scale with our comprehensive list of bus routes and schedules. With several language and currency options available, Busbud seeks to cater to international bus travelers no matter where they are in the world. With Busbud, you can buy tickets with confidence. We ensure that you make the most out of your bus trip by partnering up with reliable bus companies from all around the world such as Greyhound, Eurolines, ALSA, OUIBUS (BlaBlaBus), National Express and many others.

People from around the world trust Busbud

‌

Popular Buses Connecting Ontario

Buses Leaving from Ontario

Buses Going to Ontario

Popular Buses Connecting San Ysidro

Buses Leaving from San Ysidro

Buses Going to San Ysidro