Find coaches from Ontario, CA to San Diego, CA, US

Find affordable coach tickets from Ontario, CA to San Diego, CA, US with flexible options. Book your journey now

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Today2 Sept
from US$52
Tomorrow3 Sept
Thu4 Sept
Fri5 Sept
from US$35
Sat6 Sept
from US$43
Sun7 Sept
from US$37
Mon8 Sept
from US$43
Tue9 Sept

Cheap buses leaving Friday

One passenger / one way

  • This trip is recommended because it is the: Cheapest
    Departure time: 5 September at
    Departure city: Ontario
    Departure location: Montclair / Ontario / Claremont
    Arrival time: 5 September at
    Destination city: San Diego
    Destination location: San Diego (Old Town-FlixBus)
    Operated by: Greyhound Lines, Inc. + FlixBus
    Greyhound Lines, Inc. + FlixBus
    Vehicle: BusDuration:
  • This trip is recommended because it is the: Fastest
    Departure time: 5 September at
    Departure city: Ontario
    Departure location: Ontario Convention Center
    Arrival time: 6 September at
    Destination city: San Diego
    Destination location: Cross Border Xpress CBX (USA)
    Operated by: Los LimousinesLos Limousines
    Vehicle: BusDuration:
  • Departure time: 5 September at
    Departure city: Ontario
    Departure location: Montclair (Ontario)
    Arrival time: 5 September at
    Destination city: San Diego
    Destination location: San Diego (Old Town-FlixBus)
    Operated by: FlixBusFlixBus
    Vehicle: BusDuration:
  • Departure time: 5 September at
    Departure city: Ontario
    Departure location: Montclair (Ontario)
    Arrival time: 5 September at
    Destination city: San Diego
    Destination location: Greyhound Bus Stop
    Operated by: FlixBus + Greyhound Lines, Inc.
    FlixBus + Greyhound Lines, Inc.
    Vehicle: BusDuration:
  • Departure time: 5 September at
    Departure city: Ontario
    Departure location: Montclair / Ontario / Claremont
    Arrival time: 5 September at
    Destination city: San Diego
    Destination location: Greyhound Bus Stop
    Operated by: Greyhound Lines, Inc.Greyhound Lines, Inc.
    Vehicle: BusDuration:

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Bus Ontario, CA to San Diego, CA, US: Trip Overview

Average ticket priceUS$41
Average bus trip duration6h 5m
Number of daily buses31
Earliest bus departure04:20
Distance88 miles
Latest bus departure22:25

Ontario to San Diego 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 Diego.

We make sure you can find a bus service from Ontario to San Diego from the most reliable bus companies operating this trip.

From cheap bus tickets to more luxurious buses travelling from Ontario to San Diego, we offer a wide range of bus services to best suit your needs depending on how much your budget is.

Frequently asked questions on the trip Ontario, CA - San Diego, CA, US

  1. What's the distance between Ontario and San Diego by coach?

    The distance between Ontario and San Diego by coach is approximately 98 miles (157 km).

  2. How can I get from Ontario to San Diego without driving?

    You can travel to San Diego from Ontario by coach, which provides a smooth ride and an affordable and convenient trip. Depending on your preferences, another alternative is to explore ridesharing trips.

Find cheapest prices for buses

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

Best price found
31/08
US$38
01/09
US$50
Today
US$44
03/09
US$34
04/09
US$29
05/09
US$28
06/09
US$35
07/09
US$30
busbud logoThe cheapest trip from Ontario, CA to San Diego, CA, US was searched and found on 5 Sept 2025 with a price of US$28

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 Diego, CA, US as early as possible.

You can expect to pay from US$28 to US$58 for a bus ticket from Ontario, CA to San Diego, CA, US based on the last 2 days. You can expect to find the cheapest price for the trip at US$28, which is on 2025-09-05.

Usually Los Limousines 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 Diego but it'll also be endearing to native speakers who will surely appreciate your effort.

Start sightseeing the minute your bus leaves the station. If you're on the night bus from Ontario to San Diego, get comfy and count the stars.

Taking the bus creates the smallest carbon footprint compared to other modes of transport. Not to mention that buses will allow you to discover scenic gems from Ontario to San Diego that are otherwise impossible to come by with a plane.

Make a music playlist for your bus ride from Ontario to San Diego, 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.

Did you know there are on average 4,400 intercity bus departures every day in the US only? This number has been growing for 9 years in a row, yay!

Did you know some bus companies in Germany offer to their passenger low-costs snacks and regional beer based on their destination? Prosit!

Will you be returning to Ontario, CA by bus?

Bus from San Diego, CA, US to Ontario, 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 worlwide scale with our comprehensive list of bus routes and schedules. With Busbud, wherever you go, you have a worldwide bus station within reach and available in your own language and currency. Busbud partners with safe and reliable bus companies throughout the world such as Greyhound, Eurolines, ALSA, OUIBUS (BlaBlaBus), National Express and many others so you can buy tickets without a worry.

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